Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2017-4

Closed-End Strategy: Global Income Portfolio 2017-4

The unit investment trusts named above (the “Portfolios”), included in Invesco Unit Trusts, Series 1811, eachinvest in a portfolio of closed-end investment companies (known as “closed-end funds”). Of course, we cannotguarantee that a Portfolio will achieve its objective.

An investment can be made in the underlying funds directly rather than through a Portfolio. These directinvestments can be made without paying a Portfolio’s sales charge, operating expenses and organization costs.

October 20, 2017

You should read this prospectus and retain it for future reference.

The Securities and Exchange Commission has not approved or disapproved of the Unitsor passed upon the adequacy or accuracy of this prospectus.

Any contrary representation is a criminal offense.

INVESCO

Investment Objective. The Portfolio seeks toprovide current income and the potential for capitalappreciation.

Principal Investment Strategy. The Portfolioseeks to achieve its objective by investing in a portfolioprimarily consisting of common stock of closed-endinvestment companies (known as “closed-end funds”)that invest in senior corporate loans or other debtsecurities of limited duration. “Duration” is a measureof the sensitivity of a debt security’s price to changesin interest rates, expressed in years. Higher durationssignify greater price volatility. Invesco Capital Markets,Inc. is the Sponsor of the Portfolio.

In selecting securities for the Portfolio, the Sponsorsought to invest in funds representative of assetclasses with generally attractive senior loan and limitedduration income opportunities. In addition, theSponsor assembled the final portfolio based onconsideration of factors including, but not limited to:

• Manager Performance – Performance relativeto its benchmark and peer group

• Valuation – Premium/Discount to net assetvalue relative to itself and its peer group

• Dividend – Current dividend level andsustainability

• Diversification – Analysis of asset class mix

• Credit Quality – Analysis of fixed incomeholdings

• Liquidity – Analysis of fund trading volume

Approximately 40% of the closed-end funds in thePortfolio are funds classified as “non-diversified”under the Investment Company Act of 1940. Thesefunds have the ability to invest a greater portion oftheir assets in obligations of a single issuer. As aresult, these funds may be more susceptible tovolatility than a more diversified fund.

Of course, we cannot guarantee that your Portfoliowill achieve its objective. The value of your Units may

fall below the price you paid for the Units. You shouldread the “Risk Factors” section before you invest.

The Portfolio is designed as part of a long-terminvestment strategy. The Sponsor may offer asubsequent series of the portfolio when the currentPortfolio terminates. As a result, you may achievemore consistent overall results by following thestrategy through reinvestment of your proceeds overseveral years if subsequent series are available.Repeatedly rol l ing over an investment in a unitinvestment trust may differ from long-term investmentsin other investment products when considering thesales charges, fees, expenses and tax consequencesattributable to a Unitholder. For more information see“Rights of Unitholders--Rollover”.

Principal Risks. As with all investments, you canlose money by investing in this Portfolio. The Portfolioalso might not perform as well as you expect. This canhappen for reasons such as these:

• Security prices will fluctuate. The value ofyour investment may fall over time.

• The Portfolio invests in shares ofclosed-end funds. You should understandthe section titled “Closed-End Funds” beforeyou invest. In particular, shares of these fundstend to trade at a discount from their net assetvalue and are subject to risks related to factorssuch as management’s ability to achieve afund’s objective, market conditions affecting afund’s investments and use of leverage. Theunderlying funds have management andoperating expenses. You will bear not only yourshare of the Portfolio’s expenses, but also theexpenses of the underlying funds. By investingin other funds, the Portfolio incurs greaterexpenses than you would incur if you investeddirectly in the funds.

• The value of fixed income securities inthe closed-end funds will generally fallif interest rates rise. Given the historicallylow interest rate environment in the U.S., risks

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Closed-End Strategy: Senior Loan and Limited Duration Portfolio

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associated with rising rates are heightened.The negative impact on fixed income securitiesfrom any interest rate increases could be swiftand significant. No one can predict whetherinterest rates will rise or fall in the future.

• In the future, a closed-end fund may beunable or unwilling to make dividendpayments, and senior loan borrowersmay be unable to make payments ofinterest or principal. Any of these eventsmay reduce the level of dividends a closed-endfund pays which would reduce your incomeand cause the value of your Units to fall.

• The financial condition of a loanborrower may worsen or its creditratings may drop, resulting in areduction in the value of your units. Thismay occur at any point in time, including duringthe primary offering period.

• You could experience dilution of yourinvestment if the size of the Portfolio isincreased as Units are sold. There is noassurance that your investment will maintainits proportionate share in the Portfolio’s profitsand losses.

• The closed-end funds held by thePortfolio invest in senior loans. Althoughsenior loans in which the closed-end fundsinvest may be secured by specific collateral,there can be no assurance that liquidation ofcollateral would satisfy the borrower’s obligationin the event of non-payment of scheduledprincipal or interest or that such collateral couldbe readily liquidated. Senior loans in which theclosed-end funds invest generally are of belowinvestment grade credit quality, may be unratedat the time of investment, generally are notregistered with the Securities and ExchangeCommission or any state securit iescommission, and generally are not listed on anysecurities exchange. In addition, the amount ofpublic information available on senior loans

generally is less extensive than that available forother types of assets.

• The yield on closed-end funds investingin senior loans may fluctuate withchanges in interest rates. Generally, yieldson senior loans decline in a falling interest rateenvironment and increase in a rising interestrate environment. Because interest rates onsenior loans are reset periodically, an increasein interest rates may not be immediatelyreflected in the rates of the loans.

• The closed-end funds may invest insecurities rated below investment gradeand considered to be “junk” or “high-yield” securities. Securities rated below“BBB-” by Standard & Poor’s or below “Baa3”by Moody’s are considered to be belowinvestment grade. These securit ies areconsidered to be speculative and are subjectto greater market and credit risks. Accordingly,the r isk of default is higher than withinvestment grade securities. In addition, thesesecurities may be more sensitive to interestrate changes and may be more likely to makeearly returns of principal.

• We do not actively manage thePortfolio. While the closed-end funds havemanaged portfol ios, except in l imitedcircumstances, the Portfolio will hold, andcontinue to buy, shares of the same fundseven if their market value declines.

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Fee Table

The amounts below are estimates of the direct and indirectexpenses that you may incur based on a $10 Public Offering Price perUnit. Actual expenses may vary.

As a % of Public Amount Offering Per 100Sales Charge Price Units _________ _________

Initial sales charge 0.000% $ 0.000Deferred sales charge 2.250 22.500Creation and development fee 0.500 5.000 ______ ______Maximum sales charge 2.750% $27.500 ______ ______ ______ ______

As a % Amount of Net Per 100 Assets Units _________ _________

Estimated Organization Costs 0.472% $ 4.571 ______ ______ ______ ______

Estimated Annual Expenses Trustee’s fee and operating expenses 0.210% $ 2.029Supervisory, bookkeeping

and administrative fees 0.054 0.518Underlying fund expenses 2.422 23.447 ______ ______

Total 2.686% $25.994* ______ ______ ______ ______

Example

This example helps you compare the cost of the Portfolio with otherunit trusts and mutual funds. In the example we assume that theexpenses do not change and that the Portfolio’s annual return is 5%. Youractual returns and expenses will vary. This example also assumes thatyou continue to follow the Portfolio strategy and roll your investment,including all distributions, into a new trust every two years subject to asales charge of 2.75%. Based on these assumptions, you would pay thefollowing expenses for every $10,000 you invest in the Portfolio:

1 year $ 5813 years 1,4255 years 2,27910 years 4,286

* The estimated annual expenses are based upon the estimated trust sizefor the Portfolio determined as of the initial date of deposit. Becausecertain of the operating expenses are fixed amounts, if the Portfolio doesnot reach the estimated size, or if the value of the Portfolio or number ofoutstanding units decline over the life of the trust, or if the actual amountof the operating expenses exceeds the estimated amounts, the actualamount of the operating expenses per 100 units would exceed theestimated amounts. In some cases, the actual amount of operatingexpenses may substantially differ from the amounts reflected above.

The maximum sales charge is 2.75% of the Public Offering Priceper Unit. There is no initial sales charge at a Public Offering Price of $10or less. If the Public Offering Price exceeds $10 per Unit, the initial salescharge is the difference between the total sales charge (maximum of2.75% of the Public Offering Price) and the sum of the remainingdeferred sales charge and the creation and development fee. Thedeferred sales charge is fixed at $0.225 per Unit and accrues daily fromFebruary 10, 2018 through July 9, 2018. Your Portfolio pays aproportionate amount of this charge on the 10th day of each monthbeginning in the accrual period until paid in full. The combination of theinitial and deferred sales charges comprises the “transactional salescharge”. The creation and development fee is fixed at $0.05 per unit andis paid at the earlier of the end of the initial offering period (anticipated tobe three months) or six months following the Initial Date of Deposit. Formore detail, see “Public Offering Price - General.”

Although not an actual operating expense, the Portfolio, andtherefore the Unitholders, will indirectly bear the operating expenses of thefunds held by the Portfolio in the estimated amount provided above.Estimated fund expenses are based upon the net asset value of thenumber of fund shares held by the Portfolio per Unit multiplied by theannual operating expenses of the funds for the most recent fiscal year. TheTrustee or Sponsor will waive fees otherwise payable by the Portfolio in anamount equal to any 12b-1 fees or other compensation the Trustee, theSponsor or an affiliate receives from the funds in connection with thePortfolio’s investment in the funds, including license fees receivable by anaffiliate of the Sponsor from a fund.

Essential Information

Unit Price at Initial Date of Deposit $10.0000

Initial Date of Deposit October 20, 2017

Mandatory Termination Date October 18, 2019

Estimated Net Annual Income1,2 $0.74019 per Unit

Record Dates2 10th day of each month

Distribution Dates2 25th day of each month

CUSIP Numbers Cash – 46140E640

Reinvest – 46140E657

Wrap Fee Cash – 46140E665

Wrap Fee Reinvest – 46140E673

1 As of close of business day prior to Initial Date of Deposit. The actualdistributions you receive will vary from the estimated amount due tochanges in the Portfolio’s fees and expenses, in actual income receivedby the Portfolio, currency fluctuations and with changes in the Portfoliosuch as the acquisition or liquidation of securities. See “Rights ofUnitholders--Estimated Distributions.”

2 The Trustee will make distributions of income and capital on eachmonthly Distribution Date to Unitholders of record on the precedingRecord Date, provided that the total cash held for distribution equals atleast $0.01 per Unit. Undistributed income and capital wil l bedistributed in the next month in which the total cash held for distributionequals at least $0.01 per Unit. Based on the foregoing, it is currentlyestimated that the initial distribution will occur in November 2017.

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Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2017-4

Portfolio____________________________________________________________________________________________________________ Current Cost ofNumber Market Value Dividend Securities toof Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) __________ ___________________________________ _______________ ___________ _____________

Limited Duration - 29.95% 359 Barings Global Short Duration High Yield Fund $ 20.710 8.89% $ 7,434.89 866 Franklin Limited Duration Income Trust 12.080 10.55 10,461.28 565 Ivy High Income Opportunities Fund 15.740 9.15 8,893.10 438 KKR Income Opportunities Fund 16.900 8.88 7,402.20 785 Wells Fargo Multi-Sector Income Fund 13.220 9.77 10,377.70 Senior Loan - 70.05% 545 Ares Dynamic Credit Allocation Fund, Inc. 16.380 7.69 8,927.10 812 Avenue Income Credit Strategies Fund 14.630 9.84 11,879.56 548 Blackstone / GSO Long-Short Credit Income Fund 16.350 7.56 8,959.80 426 Blackstone / GSO Senior Floating Rate Term Fund 17.640 6.60 7,514.64 653 Blackstone / GSO Strategic Credit Fund 15.950 7.90 10,415.35 356 Eaton Vance Floating-Rate Income Plus Fund 16.680 5.47 5,938.08 510 Eaton Vance Floating-Rate Income Trust 14.620 5.50 7,456.20 504 Eaton Vance Senior Floating-Rate Trust 14.780 5.60 7,449.12* 876 Invesco Dynamic Credit Opportunities Fund 11.890 7.17 10,415.64 1,316 Nuveen Senior Income Fund 6.790 6.98 8,935.64 600 Nuveen Short Duration Credit Opportunities Fund 17.320 7.34 10,392.00 346 THL Credit Senior Loan Fund 17.200 6.70 5,951.20__________ ____________

10,505 $ 148,803.50__________ ______________________ ____________

See “Notes to Portfolios”.

Investment Objective. The Portfolio seeks toprovide current income and the potential for capitalappreciation.

Principal Investment Strategy. The Portfolioseeks to achieve its objective by investing in a portfolioconsist ing of common stocks of closed-endinvestment companies (known as “closed-end funds”)that invest in various global equity and fixed incomesecurities. These closed-end funds may invest in awide range of sectors and strategies such as globalreal estate, global stocks, global bonds, preferredsecurities, covered call option strategies, convertiblesecurities, emerging markets bonds and other totalreturn strategies. Invesco Capital Markets, Inc. is theSponsor of the Portfolio.

In selecting securities for the Portfolio, the Sponsorsought to invest in funds that have significant globalinvestment exposure. In addit ion, the Sponsorassembled the f inal portfol io based on factorsincluding valuation, current yield, share price at adiscount to net asset value, credit quality and assetclass mix of each of the underlying funds.

In selecting securities for the Portfolio, the Sponsorsought to invest in funds representative of assetclasses with generally attractive global incomeopportunities. In addition, the Sponsor assembled thefinal portfolio based on consideration of factorsincluding, but not limited to:

• Manager Performance – Performance relativeto its benchmark and peer group

• Valuation – Premium/Discount to net assetvalue relative to itself and its peer group

• Dividend – Current dividend level andsustainability

• Diversification – Analysis of asset class mix

• Credit Quality – Analysis of fixed incomeholdings

• Liquidity – Analysis of fund trading volume

Approximately 48% of the closed-end funds in thePortfolio are funds classified as “non-diversified” underthe Investment Company Act of 1940. These fundshave the ability to invest a greater portion of theirassets in obligations of a single issuer. As a result,these funds may be more susceptible to volatility thana more diversified fund.

Of course, we cannot guarantee that your Portfoliowill achieve its objective. The value of your Units mayfall below the price you paid for the Units. You shouldread the “Risk Factors” section before you invest.

The Portfolio is designed as part of a long-terminvestment strategy. The Sponsor may offer asubsequent series of the portfolio when the currentPortfolio terminates. As a result, you may achievemore consistent overall results by following thestrategy through reinvestment of your proceeds overseveral years if subsequent series are available.Repeatedly rol l ing over an investment in a unitinvestment trust may differ from long-term investmentsin other investment products when considering thesales charges, fees, expenses and tax consequencesattributable to a Unitholder. For more information see“Rights of Unitholders--Rollover”.

Principal Risks. As with all investments, you canlose money by investing in this Portfolio. The Portfolioalso might not perform as well as you expect. This canhappen for reasons such as these:

• Security prices will fluctuate. The value ofyour investment may fall over time.

• The Portfolio invests in shares ofclosed-end funds. You should understandthe section titled “Closed-End Funds” beforeyou invest. In particular, shares of these fundstend to trade at a discount from their net assetvalue and are subject to risks related to factorssuch as management’s ability to achieve afund’s objective, market conditions affecting afund’s investments and use of leverage. Theunderlying funds have management andoperating expenses. You will bear not only your

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Closed-End Strategy: Global Income Portfolio

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share of the Portfolio’s expenses, but also theexpenses of the underlying funds. By investingin other funds, the Portfolio incurs greaterexpenses than you would incur if you investeddirectly in the funds.

• The value of fixed income securities inthe closed-end funds will generally fallif interest rates rise. Given the historicallylow interest rate environment in the U.S., risksassociated with rising rates are heightened.The negative impact on fixed income securitiesfrom any interest rate increases could be swiftand significant. No one can predict whetherinterest rates will rise or fall in the future.

• A security issuer may be unable tomake payments of interest, dividends orprincipal in the future. This may reduce thelevel of dividends a closed-end fund payswhich would reduce your income and causethe value of your Units to fall.

• The financial condition of a securityissuer may worsen or its credit ratingsmay drop, resulting in a reduction in thevalue of your Units. This may occur at anypoint in time, including during the primaryoffering period.

• You could experience dilution of yourinvestment if the size of the Portfolio isincreased as Units are sold. There is noassurance that your investment will maintainits proportionate share in the Portfolio’s profitsand losses.

• The closed-end funds may invest insecurities of foreign issuers, presentingrisks beyond those of U.S. issuers.These risks may include market and politicalfactors related to an issuer’s foreign market,international trade conditions, less regulation,smaller or less l iquid markets, increasedvolatility, differing accounting and tax practicesand changes in the value of foreign currencies

which may have both economic and taxconsequences.

• The closed-end funds may invest insecurities rated below investment gradeand considered to be “junk” or “high-yield” securities. Securities rated below“BBB-” by Standard & Poor’s or below “Baa3”by Moody’s are considered to be belowinvestment grade. These securit ies areconsidered to be speculative and are subjectto greater market and credit risks. Accordingly,the r isk of default is higher than withinvestment grade securities. In addition, thesesecurities may be more sensitive to interestrate changes and may be more likely to makeearly returns of principal.

• Certain of the closed-end funds heldby the Portfolio invest in preferredsecurities. Preferred securities are typicallysubordinated to bonds and other debtinstruments in a company’s capital structurein terms of priority to corporate income andtherefore are subject to greater risk thanthose debt instruments. Preferred securitiesare subject to interest rate risk, meaning thattheir values may fal l i f interest rates, ingeneral, rise. In addition to the other risksdescr ibed here in, income payments oncertain preferred securities may be deferredwhich may reduce the amount of income youreceive on your Units.

• Certain of the closed-end funds held bythe Portfolio invest in shares of REITsand other real estate companies. Sharesof REITs and other real estate companies mayappreciate or depreciate in value, or paydividends depending upon global and localeconomic conditions, changes in interest ratesand the strength or weakness of the overall realestate market. Negative developments in thereal estate industry will affect the value of yourinvestment more than would be the case in amore diversified investment.

• Certain of the closed-end funds heldby the Portfolio invest in senior loans.Although senior loans in which the closed-end funds invest may be secured by specificcollateral, there can be no assurance thatliquidation of collateral would satisfy theborrower’s obl igat ion in the event ofnon-payment of scheduled pr inc ipal orinterest or that such col lateral could bereadily liquidated. Senior loans in which theclosed-end funds invest generally are ofbelow investment grade credit quality, maybe unrated at the t ime of investment,genera l ly are not registered with theSecurities and Exchange Commission or anystate securities commission, and generallyare not listed on any securities exchange. Inaddition, the amount of public informationavailable on senior loans generally is lessextensive than that available for other typesof assets.

• The yield on closed-end funds investingin senior loans may fluctuate withchanges in interest rates. Generally, yieldson senior loans decline in a falling interest rateenvironment and increase in a rising interestrate environment. Because interest rates onsenior loans are reset periodically, an increasein interest rates may not be immediatelyreflected in the rates of the loans.

• Certain of the funds held by thePortfolio write call options on theirassets. The use of options may require anunderlying fund to sell portfolio securities atinopportune times or at prices other thancurrent market values, may limit the amount ofappreciat ion a fund can real ize on aninvestment, or may cause a fund to hold asecurity it might otherwise sell. To the extent anunderlying fund purchases options pursuant toa hedging strategy, the fund could lose itsentire investment in the option.

• We do not actively manage thePortfolio. While the closed-end funds havemanaged portfol ios, except in l imitedcircumstances, the Portfolio will hold, andcontinue to buy, shares of the same fundseven if their market value declines.

8

Fee Table

The amounts below are estimates of the direct and indirectexpenses that you may incur based on a $10 Public Offering Price perUnit. Actual expenses may vary.

As a % of Public Amount Offering Per 100Sales Charge Price Units _________ _________

Initial sales charge 0.000% $ 0.000Deferred sales charge 2.250 22.500Creation and development fee 0.500 5.000 ______ ______Maximum sales charge 2.750% $27.500 ______ ______ ______ ______

As a % Amount of Net Per 100 Assets Units _________ _________

Estimated Organization Costs 0.517% $ 5.000 ______ ______ ______ ______

Estimated Annual Expenses Trustee’s fee and operating expenses 0.313% $ 3.033Supervisory, bookkeeping

and administrative fees 0.057 0.550Underlying fund expenses 1.935 18.724 ______ ______

Total 2.305% $22.307* ______ ______ ______ ______

Example

This example helps you compare the cost of the Portfolio with otherunit trusts and mutual funds. In the example we assume that theexpenses do not change and that the Portfolio’s annual return is 5%. Youractual returns and expenses will vary. This example also assumes thatyou continue to follow the Portfolio strategy and roll your investment,including all distributions, into a new trust every two years subject to asales charge of 2.75%. Based on these assumptions, you would pay thefollowing expenses for every $10,000 you invest in the Portfolio:

1 year $ 5483 years 1,3275 years 2,12210 years 3,996

* The estimated annual expenses are based upon the estimated trust sizefor the Portfolio determined as of the initial date of deposit. Becausecertain of the operating expenses are fixed amounts, if the Portfolio doesnot reach the estimated size, or if the value of the Portfolio or number ofoutstanding units decline over the life of the trust, or if the actual amountof the operating expenses exceeds the estimated amounts, the actualamount of the operating expenses per 100 units would exceed theestimated amounts. In some cases, the actual amount of operatingexpenses may substantially differ from the amounts reflected above.

The maximum sales charge is 2.75% of the Public Offering Priceper Unit. There is no initial sales charge at a Public Offering Price of $10or less. If the Public Offering Price exceeds $10 per Unit, the initial salescharge is the difference between the total sales charge (maximum of2.75% of the Public Offering Price) and the sum of the remainingdeferred sales charge and the creation and development fee. Thedeferred sales charge is fixed at $0.225 per Unit and accrues daily fromFebruary 10, 2018 through July 9, 2018. Your Portfolio pays aproportionate amount of this charge on the 10th day of each monthbeginning in the accrual period until paid in full. The combination of theinitial and deferred sales charges comprises the “transactional salescharge”. The creation and development fee is fixed at $0.05 per unit andis paid at the earlier of the end of the initial offering period (anticipated tobe three months) or six months following the Initial Date of Deposit. Formore detail, see “Public Offering Price - General.”

Although not an actual operating expense, the Portfolio, andtherefore the Unitholders, will indirectly bear the operating expenses ofthe funds held by the Portfolio in the estimated amount provided above.Estimated fund expenses are based upon the net asset value of thenumber of fund shares held by the Portfolio per Unit multiplied by theannual operating expenses of the funds for the most recent fiscal year.The Trustee or Sponsor will waive fees otherwise payable by thePortfolio in an amount equal to any 12b-1 fees or other compensationthe Trustee, the Sponsor or an affiliate receives from the funds inconnection with the Portfolio’s investment in the funds, including licensefees receivable by an affiliate of the Sponsor from a fund.

Essential Information

Unit Price at Initial Date of Deposit $10.0000Initial Date of Deposit October 20, 2017Mandatory Termination Date October 18, 2019Estimated Net Annual Income1,2 $0.70126 per UnitRecord Dates2 10th day of each monthDistribution Dates2 25th day of each monthCUSIP Numbers Cash – 46140E608 Reinvest – 46140E616 Wrap Fee Cash – 46140E624 Wrap Fee Reinvest – 46140E632

1 As of close of business day prior to Initial Date of Deposit. The actualdistributions you receive will vary from the estimated amount due tochanges in the Portfolio’s fees and expenses, in actual income receivedby the Portfolio, currency fluctuations and with changes in the Portfoliosuch as the acquisition or liquidation of securities. See “Rights ofUnitholders--Estimated Distributions.”

2 The Trustee will make distributions of income and capital on eachmonthly Distribution Date to Unitholders of record on the precedingRecord Date, provided that the total cash held for distribution equals atleast $0.01 per Unit. Undistributed income and capital wil l bedistributed in the next month in which the total cash held for distributionequals at least $0.01 per Unit. Based on the foregoing, it is currentlyestimated that the initial distribution will occur in December 2017.

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Closed-End Strategy: Global Income Portfolio 2017-4

Portfolio____________________________________________________________________________________________________________ Current Cost ofNumber Market Value Dividend Securities toof Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) __________ ___________________________________ _______________ ___________ _____________

Covered Call and Income - 7.98% 611 Cohen & Steers Global Income Builder, Inc. $ 9.690 8.54% $ 5,920.59 735 Voya Global Equity Dividend and Premium Opportunity Fund 8.070 9.07 5,931.45 Emerging Market Equity - 3.98% 627 Voya Emerging Markets High Dividend Equity Fund 9.420 7.86 5,906.34 Emerging Market Income - 3.99% 739 Morgan Stanley Emerging Markets Domestic Debt Fund, Inc. 8.010 7.49 5,919.39 Equity Tax-Advantaged - 8.02% 343 Eaton Vance Tax-Advantaged Global Dividend Income Fund 17.310 7.11 5,937.33 349 Nuveen Tax-Advantaged Dividend Growth Fund 17.120 7.24 5,974.88 Global Equity - 8.00% 231 BlackRock Science & Technology Trust 25.740 5.13 5,945.94 366 Voya Infrastructure, Industrials and Materials Fund 16.220 7.15 5,936.52 Global Equity Dividend - 4.01% 553 Alpine Global Dynamic Dividend Fund 10.760 7.25 5,950.28 Global Growth & Income - 8.01% 653 Calamos Global Dynamic Income Fund 9.120 9.21 5,955.36 348 Lazard Global Total Return and Income Fund, Inc. 17.080 5.75 5,943.84 Global Income - 12.00% 508 First Trust/Aberdeen Global Opportunity Income Fund 11.700 7.69 5,943.60 342 Nuveen Global High Income Fund 17.350 8.30 5,933.70 578 Western Asset Global High Income Fund, Inc. 10.280 7.76 5,941.84 Global Real Estate - 8.03% 874 Alpine Global Premier Properties Fund 6.830 8.78 5,969.42 332 Nuveen Real Asset Income and Growth Fund 17.920 7.10 5,949.44

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Closed-End Strategy: Global Income Portfolio 2017-4

Portfolio (continued)____________________________________________________________________________________________________________ Current Cost ofNumber Market Value Dividend Securities toof Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) __________ ___________________________________ _______________ ___________ _____________

High-Yield - 8.00% 287 Barings Global Short Duration High Yield Fund $ 20.710 8.89% $ 5,943.77 603 New America High Income Fund, Inc. 9.850 7.31 5,939.55 Investment Grade - 4.00% 328 John Hancock Investors Trust 18.120 7.27 5,943.36 Limited Duration - 4.00% 416 Eaton Vance Short Duration Diversified Income Fund 14.290 6.42 5,944.64 Multi-Sector - 3.98% 282 DoubleLine Income Solutions Fund 20.970 8.58 5,913.54 Preferred and Income - 7.99% 239 First Trust Intermediate Duration Preferred & Income Fund 24.670 7.42 5,896.13 233 Nuveen Preferred & Income Term Fund 25.610 6.63 5,967.13 Senior Loan - 4.00% 406 Avenue Income Credit Strategies Fund 14.630 9.84 5,939.78 Utilities - 4.01% 257 Cohen & Steers Infrastructure Fund, Inc. 23.180 6.94 5,957.26__________ ____________

11,240 $ 148,505.08__________ ______________________ ____________

See “Notes to Portfolios”.

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Notes to Portfolios

(1) The Securities are initially represented by “regular way” contracts for the performance of which an irrevocable letter ofcredit has been deposited with the Trustee. Contracts to acquire Securities were entered into on October 19, 2017 andhave a settlement date of October 23, 2017 (see “The Portfolios”).

(2) The value of each Security is determined on the bases set forth under “Public Offering--Unit Price” as of the close of theNew York Stock Exchange on the business day before the Initial Date of Deposit. In accordance with FASB AccountingStandards Codification (“ASC”), ASC 820, Fair Value Measurements and Disclosures, the Portfolio’s investments areclassified as Level 1, which refers to security prices determined using quoted prices in active markets for identicalsecurities. Other information regarding the Securities, as of the Initial Date of Deposit, is as follows:

Profit Cost to (Loss) To Sponsor Sponsor ______________ _____________

Closed-End Strategy: Senior Loan and Limited Duration Portfolio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 149,066 $ (262)

Closed-End Strategy: Global Income Portfolio . . . . . . . . . . . . . $ 148,786 $ (281)

“*” The investment advisor of this fund is an affiliate of the Sponsor.

(3) Current Dividend Yield for each Security is based on the estimated annual dividends per share and the Security’s valueas of the most recent close of trading on the New York Stock Exchange on the business day before the Initial Date ofDeposit. Generally, estimated annual dividends per share are calculated by annualizing the most recently declaredregular dividends or by adding the most recent regular interim and final dividends declared and reflect any foreignwithholding taxes. In certain cases, this calculation may consider several recently declared dividends in order for theCurrent Dividend Yield to be more reflective of recent historical dividend rates.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Unitholders of Invesco Unit Trusts, Series 1811:

We have audited the accompanying statements of condition including the related portfolios of Closed-EndStrategy: Senior Loan and Limited Duration Portfolio 2017-4 and Closed-End Strategy: Global IncomePortfolio 2017-4 (the “Trust,” included in Invesco Unit Trusts, Series 1811) as of October 20, 2017. Thestatements of condition are the responsibility of the Sponsor. Our responsibility is to express an opinion onsuch statements of condition based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting OversightBoard (United States). Those standards require that we plan and perform the audits to obtain reasonableassurance about whether the statements of condition are free of material misstatement. We were notengaged to perform an audit of the Trust’s internal control over financial reporting. Our audits includedconsideration of internal control over financial reporting as a basis for designing audit procedures that areappropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of theTrust’s internal control over financial reporting. Accordingly, we express no such opinion. An audit alsoincludes examining, on a test basis, evidence supporting the amounts and disclosures in the statements ofcondition, assessing the accounting principles used and significant estimates made by the Sponsor, as wellas evaluating the overall statements of condition presentation. Our procedures included confirmation withThe Bank of New York Mellon, Trustee, of cash or irrevocable letters of credit deposited for the purchase ofSecurities as shown in the statements of condition as of October 20, 2017. We believe that our audits of thestatements of condition provide a reasonable basis for our opinion.

In our opinion, the statements of condition referred to above present fairly, in all material respects, the financialposition of Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2017-4 and Closed-End Strategy:Global Income Portfolio 2017-4 (included in Invesco Unit Trusts, Series 1811) as of October 20, 2017, inconformity with accounting principles generally accepted in the United States of America.

/s/ GRANT THORNTON LLP

New York, New YorkOctober 20, 2017

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STATEMENTS OF CONDITIONAs of October 20, 2017

Closed-End Strategy: Senior Closed-End Loan and Strategy: Limited Global Duration IncomeINVESTMENT IN SECURITIES Portfolio Portfolio _____________ _____________Contracts to purchase Securities (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 148,804 $ 148,505 _____________ _____________ Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 148,804 $ 148,505 _____________ _____________ _____________ _____________

LIABILITIES AND INTEREST OF UNITHOLDERSLiabilities-- Organization costs (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 680 $ 743 Deferred sales charge liability (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,348 3,341 Creation and development fee liability (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 744 743Interest of Unitholders-- Cost to investors (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148,804 148,505Less: deferred sales charge, creation and development fee and organization costs (2)(4)(5)(6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,772 4,827 _____________ _____________ Net interest to Unitholders (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144,032 143,678 _____________ _____________ Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 148,804 $ 148,505 _____________ _____________ _____________ _____________Units outstanding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,881 14,851 _____________ _____________ _____________ _____________Net asset value per Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 9.679 $ 9.675 _____________ _____________ _____________ _____________

(1) The value of the Securities is determined by the Trustee on the bases set forth under “Public Offering--Unit Price”. The contracts to purchaseSecurities are collateralized by separate irrevocable letters of credit which have been deposited with the Trustee.

(2) A portion of the Public Offering Price represents an amount sufficient to pay for all or a portion of the costs incurred in establishing a Portfolio.The amount of these costs are set forth in the “Fee Table”. A distribution will be made as of the earlier of the close of the initial offering period(approximately three months) or six months following the Initial Date of Deposit to an account maintained by the Trustee from which theorganization expense obligation of the investors will be satisfied. To the extent that actual organization costs of a Portfolio are greater than theestimated amount, only the estimated organization costs added to the Public Offering Price will be reimbursed to the Sponsor and deductedfrom the assets of the Portfolio.

(3) Represents the amount of mandatory distributions from a Portfolio on the bases set forth under “Public Offering”.(4) The creation and development fee is payable by a Portfolio on behalf of Unitholders out of the assets of the Portfolio as of the close of the

initial offering period. If Units are redeemed prior to the close of the initial public offering period, the fee will not be deducted from the proceeds.(5) The aggregate public offering price and the aggregate sales charge are computed on the bases set forth under “Public Offering”.(6) Assumes the maximum sales charge.

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THE PORTFOLIOS

The Portfolios were created under the laws of theState of New York pursuant to a Trust Indenture andTrust Agreement (the “Trust Agreement”), dated thedate of this prospectus (the “Initial Date of Deposit”),among Invesco Capital Markets, Inc., as Sponsor,Invesco Investment Advisers LLC, as Supervisor andThe Bank of New York Mellon, as Trustee.

Each Portfolio offers investors the opportunity topurchase Units representing proportionate interests ina portfol io of shares of closed-end funds. EachPortfolio may be an appropriate medium for investorswho desire to participate in a portfolio of securitieswith greater diversification than they might be able toacquire individually.

On the Initial Date of Deposit, the Sponsor depositeddelivery statements relating to contracts for thepurchase of the Securities and an irrevocable letter ofcredit in the amount required for these purchases withthe Trustee. In exchange for these contracts the Trusteedelivered to the Sponsor documentation evidencing theownership of Units of the Portfolios. Unless otherwiseterminated as provided in the Trust Agreement, aPortfolio will terminate on the Mandatory TerminationDate and any remaining Securities will be liquidated ordistributed by the Trustee within a reasonable time. Asused in this prospectus the term “Securities” means thesecurities (including contracts to purchase thesesecurities) listed in each “Portfolio” and any additionalsecurities deposited into a Portfolio.

Additional Units of a Portfolio may be issued at anytime by depositing in the Portfolio (i) additional Securities,(ii) contracts to purchase Securities together with cash orirrevocable letters of credit or (iii) cash (or a letter of creditor the equivalent) with instructions to purchase additionalSecurities. As additional Units are issued by a Portfolio,the aggregate value of the Securities will be increased andthe fractional undivided interest represented by each Unitmay be decreased. The Sponsor may continue to makeadditional deposits into a Portfolio following the Initial Dateof Deposit provided that the additional deposits will be inamounts which will maintain, as nearly as practicable, thesame percentage relationship among the number of

shares of each Security in the Portfolio that existedimmediately prior to the subsequent deposit. Investorsmay experience a dilution of their investments and areduction in their anticipated income because offluctuations in the prices of the Securities between thetime of the deposit and the purchase of the Securities andbecause a Portfolio will pay the associated brokerage oracquisition fees. In addition, during the initial offering ofUnits it may not be possible to buy a particular Securitydue to regulatory or trading restrictions, or corporateactions. While such limitations are in effect, additionalUnits would be created by purchasing each of theSecurities in your Portfolio that are not subject to thoselimitations. This would also result in the dilution of theinvestment in any such Security not purchased andpotential variances in anticipated income. Purchases andsales of Securities by your Portfolio may impact the valueof the Securities. This may especially be the case duringthe initial offering of Units, upon Portfolio termination andin the course of satisfying large Unit redemptions.

Each Unit of your Portfolio initially offered representsan undivided interest in the Portfolio. At the close of theNew York Stock Exchange on the Initial Date of Deposit,the number of Units may be adjusted so that the PublicOffering Price per Unit equals $10. The number of Units,fractional interest of each Unit in your Portfolio and theestimated distributions per Unit will increase or decreaseto the extent of any adjustment. To the extent that anyUnits are redeemed by the Trustee or additional Units areissued as a result of additional Securities being depositedby the Sponsor, the fractional undivided interest in yourPortfolio represented by each unredeemed Unit willincrease or decrease accordingly, although the actualinterest in your Portfolio will remain unchanged. Units willremain outstanding until redeemed upon tender to theTrustee by Unitholders, which may include the Sponsor,or until the termination of the Trust Agreement.

Each Portfolio consists of (a) the Securities (includingcontracts for the purchase thereof) listed under theapplicable “Portfolio” as may continue to be held fromtime to time in the Portfolio, (b) any additional Securitiesacquired and held by the Portfolio pursuant to theprovisions of the Trust Agreement and (c) any cash heldin the related Income and Capital Accounts. Neither the

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Sponsor nor the Trustee shall be liable in any way forany contract failure in any of the Securities.

OBJECTIVES AND SECURITIES SELECTION

The objective of each Portfolio is described in theindividual Portfolio sections. There is no assurance thata Portfolio will achieve its objective.

The Sponsor does not manage the Portfolios. Youshould note that the Sponsor applied the selectioncriteria to the Securities for inclusion in the Portfoliosprior to the Initial Date of Deposit. After this time, theSecurities may no longer meet the selection criteria.Should a Security in your Portfolio no longer meet theselection criteria, it will generally not be removed fromthe Portfolio. In offering the Units to the public, neitherthe Sponsor nor any broker-dealers are recommendingany of the individual Securities but rather the entire poolof Securities in the Portfolios, taken as a whole, whichare represented by the Units.

CLOSED-END FUNDS

Closed-end funds are a type of investment companythat hold an actively managed portfolio of securities.Closed-end funds issue shares in “closed-end” offeringswhich generally trade on a stock exchange (althoughsome closed-end fund shares are not listed on asecurities exchange). The funds in the Portfolios all arecurrently l isted on a securit ies exchange. Sinceclosed-end funds maintain a relatively fixed pool ofinvestment capital, portfolio managers may be betterable to adhere to their investment philosophies throughgreater flexibility and control. In addition, closed-endfunds don’t have to manage fund liquidity to meetpotentially large redemptions.

Closed-end funds are subject to various risks,including management’s ability to meet the closed-endfund’s investment objective, and to manage the closed-end fund portfolio when the underlying securities areredeemed or sold, during periods of market turmoil andas investors’ perceptions regarding closed-end funds ortheir underlying investments change.

Shares of closed-end funds frequently trade at adiscount from their net asset value in the secondary

market. This risk is separate and distinct from the riskthat the net asset value of closed-end fund shares maydecrease. The amount of such discount from net assetvalue is subject to change from time to time in responseto various factors.

The closed-end funds included in the Portfolios mayemploy the use of leverage in their portfolios through theissuance of preferred stock or other methods. Whileleverage often serves to increase the yield of aclosed-end fund, this leverage also subjects theclosed-end fund to increased risks. These risks mayinclude the likelihood of increased volatility and thepossibility that the closed-end fund’s common shareincome will fall if the dividend rate on the preferred sharesor the interest rate on any borrowings rises. The potentialinability for a closed-end fund to employ the use ofleverage effectively, due to disruptions in the market forthe various instruments issued by closed-end funds orother factors, may result in an increase in borrowingcosts and a decreased yield for a closed-end fund.

Certain of the funds in the Portfol ios may beclassified as “non-diversified” under the InvestmentCompany Act of 1940. These funds have the ability toinvest a greater portion of their assets in securities of asingle issuer which could reduce diversification.

Only the Trustee may vote the shares of theclosed-end funds held in the Portfolios. The Trustee willvote the shares in the same general proportion asshares held by other shareholders of each fund. YourPortfolio is generally required, however, to reject anyoffer for securities or other property in exchange forportfolio securities as described under “PortfolioAdministration--Portfolio Administration.”

RISK FACTORS

All investments involve risk. This section describesthe main risks that can impact the value of the securitiesin your Portfolio or in the underlying funds. You shouldunderstand these risks before you invest. If the value ofthe securities falls, the value of your Units will also fall.We cannot guarantee that your Portfolio will achieve itsobjective or that your investment return will be positiveover any period.

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Market Risk. Market risk is the risk that the value ofthe securities in your Portfolio or in the underlying fundswill fluctuate. This could cause the value of your Units tofall below your original purchase price. Market valuefluctuates in response to various factors. These caninclude changes in interest rates, inflation, the financialcondition of a security’s issuer, perceptions of the issuer,or ratings on a security. Even though your Portfolio issupervised, you should remember that we do notmanage your Portfolio. Your Portfolio will not sell asecurity solely because the market value falls as ispossible in a managed fund.

Dividend Payment Risk. Dividend payment risk isthe risk that an issuer of a security, a fund or an underlyingsecurity in a fund is unwilling or unable to pay dividendson a security. Stocks represent ownership interests in theissuers and are not obligations of the issuers. Commonstockholders have a right to receive dividends only afterthe company has provided for payment of its creditors,bondholders and preferred stockholders. Common stocksdo not assure dividend payments. Dividends are paid onlywhen declared by an issuer’s board of directors and theamount of any dividend may vary over time. If dividendsreceived by a Portfolio are insufficient to cover expenses,redemptions or other Portfolio costs, it may be necessaryfor the Portfolio to sell Securities to cover such expenses,redemptions or other costs. Any such sales may result incapital gains or losses to you. See “Taxation”.

Interest Rate Risk. Interest rate risk is the risk thatthe value of securities held by a closed-end fund will fallif interest rates increase. The securities held by theclosed-end funds typically fall in value when interestrates rise and rise in value when interest rates fall. Thesecurities held by the closed-end funds with longerperiods before maturity are often more sensitive tointerest rate changes. Given the historically low interestrate environment in the U.S., risks associated with risingrates are heightened. The negative impact on fixedincome securities from any interest rate increases couldbe swift and significant and, as a result, a rise in interestrates may adversely affect the value of your Units.

Credit Risk. Credit risk is the risk that a borrower isunable to meet its obligation to pay principal or intereston a security held by a closed-end fund. This may

reduce the level of dividends a closed-end fund payswhich would reduce your income and could cause thevalue of your Units to fall.

Closed-End Funds. Each Portfolio invests in sharesof closed-end funds. You should understand thepreceding section titled “Closed-End Funds” before youinvest. Shares of closed-end funds frequently trade at adiscount from their net asset value in the secondarymarket. This risk is separate and distinct from the riskthat the net asset value of fund shares may decrease.The amount of such discount from net asset value issubject to change from time to time in response tovarious factors. Closed-end funds are subject to variousrisks, including management’s ability to meet the fund’sinvestment objective, and to manage the fund portfoliowhen the underlying securities are redeemed or sold,during periods of market turmoil and as investors’perceptions regarding closed-end funds or theirunderlying investments change. The Portfolios and theunderlying funds have operating expenses. You will bearnot only your share of your Portfolio’s expenses, but alsothe expenses of the underlying funds. By investing inother funds, your Portfolio incurs greater expenses thanyou would incur if you invested directly in the funds.

Senior Loans. The Portfolios may invest significantlyin closed-end funds that invest in secured senior loans(or “senior loans”). Senior loans are debt instrumentsissued by various financial institutions and other issuersto corporations, partnerships, limited liability companiesand other entities to finance leveraged buyouts,recapital izations, mergers, acquisit ions, stockrepurchases, debt refinancings and, to a lesser extent,for general operating and other purposes. Senior loansare backed by a company’s assets and generally holdthe most senior posit ion in a company’s capitalstructure, ahead of other types of debt securities, as wellas preferred and common stock. Senior secured loansare typically backed by assets such as inventory,receivables, real estate property, buildings, intellectualproperty such as patents or trademarks, and even thestock of other companies or subsidiaries. In the event ofnon-payment, there is no assurance that such collateralcould be readily liquidated, or that liquidation wouldsatisfy the borrower’s obligation. In addition, while

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secured creditors generally receive greater protection ininsolvency situations, there is no assurance thatcollateral could be readily liquidated, or that liquidation ofcollateral will be sufficient to repay interest and/orprincipal in such situations. In the event of non-paymentconcerning a loan held by a fund in your Portfolio, thevalue of your Units may be adversely affected.

Additionally, the underlying loan interest rates “float”above indices, which can move up or down with marketrate movements, such as the prime rate offered by oneor more major banks, the London Interbank OfferedRate (“LIBOR”) or other alternative benchmark rates(LIBOR may be discontinued as early as 2018 and maybe completely phased out by 2021) or the certificate ofdeposit rate or other base lending rates used bycommercial lenders. As a result, the yield on closed-endfunds investing in senior loans will generally decline in afalling interest rate environment and increase in a risinginterest rate environment. Additionally, since senior loansgenerally have floating interest rates, they are typicallynot as sensitive as fixed-income investments to pricefluctuations due to changes in interest rates. Seniorloans have historically paid a higher rate of interest thanmost short-term investments. Of course, there is noguarantee that this will occur in the future.

Senior loans are generally below investment gradequality and may be unrated at the time of investment; aregenerally not registered with the Securities and ExchangeCommission (“SEC”) or state securities commissions; andare generally not listed on any securities exchange. Inaddition, the amount of public information available onsenior loans is generally less extensive than that typicallyavailable for other types of securities.

High-Yield Security Risk. Certain of the closed-endfunds held by the Portfolios may invest in high-yieldsecurities or unrated securities. High-yield, high risksecurities are subject to greater market fluctuations andrisk of loss than securities with higher investment ratings.The value of these securities will decline significantly withincreases in interest rates, not only because increases inrates generally decrease values, but also becauseincreased rates may indicate an economic slowdown. Aneconomic slowdown, or a reduction in an issuer’screditworthiness, may result in the issuer being unable to

maintain earnings at a level sufficient to maintain interestand principal payments.

High-yield or “junk” securities, the generic names forsecurities rated below “BBB-” by Standard & Poor’s or“Baa3” by Moody’s, are frequently issued by corporationsin the growth stage of their development or by establishedcompanies who are highly leveraged or whose operationsor industries are depressed. Securities rated below BBB-or Baa3 are considered speculative as these ratingsindicate a quality of less than investment grade. Becausehigh-yield securities are generally subordinated obligationsand are perceived by investors to be riskier than higherrated securities, their prices tend to fluctuate more thanhigher rated securities and are affected by short-termcredit developments to a greater degree.

The market for high-yield securities is smaller andless liquid than that for investment grade securities.High-yield securities are generally not listed on anational securities exchange but trade in the over-the-counter markets. Due to the smaller, less liquid marketfor high-yield securities, the bid-offer spread on suchsecurities is generally greater than it is for investmentgrade securities and the purchase or sale of suchsecurities may take longer to complete.

Foreign Issuer Risk. Some of the underlyingsecurities held by certain of the closed-end funds held bythe Global Income Portfolio may be issued by foreignissuers. This subjects your Portfolio to more risks than if itonly invested in closed-end funds which invest solely insecurities of domestic issuers. Risks of foreign issuersinclude restrictions on foreign investments and exchangeof securities and inadequate financial information. Foreignsecurities may also be affected by market and politicalfactors specific to the issuer’s country as well asfluctuations in foreign currency exchange rates. Risksassociated with investing in foreign securities may bemore pronounced in emerging markets where thesecurities markets are substantially smaller, lessdeveloped, less liquid, less regulated, and more volatilethan the securities markets of the U.S. and developedforeign markets. Investments in debt securities of foreigngovernments present special risks, including the fact thatissuers may be unable or unwilling to repay principaland/or interest when due in accordance with the terms of

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such debt, or may be unable to make such repaymentswhen due in the currency required under the terms of thedebt. Political, economic and social events also may havea greater impact on the price of debt securities issued byforeign governments than on the price of U.S. securities.In addition, brokerage and other transaction costs onforeign securities exchanges are often higher than in theUnited States and there is generally less governmentsupervision and regulation of exchanges, brokers andissuers in foreign countries.

Emerging Market Risk. Certain closed-end fundsheld by the Global Income Portfolio invest in securitiesissued by entit ies located in emerging markets.Emerging markets are generally defined as countries inthe initial states of their industrialization cycles with lowper capita income. The markets of emerging marketscountries are generally more volatile than the markets ofdeveloped countries with more mature economies. All ofthe risks of investing in foreign securities describedabove are heightened by investing in emerging marketscountries. Risks of investing in developing or emergingcountries are even greater than the risks associated withforeign investments in general. These increased risksinclude, among other risks, the possibility of investmentand trading limitations, greater liquidity concerns, higherprice volati l ity, greater delays and disruptions insettlement transactions, greater political uncertaintiesand greater dependence on international trade ordevelopment assistance. In addition, emerging marketcountries may be subject to over-burdenedinfrastructures, obsolete f inancial systems andenvironmental problems. For these reasons, investmentsin emerging markets are often considered speculative.

Option Risk. Certain closed-end funds held in theGlobal Income Portfolio may invest using a covered calloption strategy or similar income-oriented investmentstrategies. You should understand the risks of thesestrategies before you invest. In employing a covered callstrategy, a closed-end fund will generally write (sell) calloptions on a significant portion of the fund’s managedassets. These call options will give the option holder theright, but not the obligation, to purchase a security fromthe fund at the strike price on or prior to the option’sexpiration date. The ability to successfully implement the

fund’s investment strategy depends on the fund adviser’sability to predict pertinent market movements, whichcannot be assured. Thus, the use of options may requirea fund to sell portfolio securities at inopportune times orfor prices other than current market values, may limit theamount of appreciation the fund can realize on aninvestment, or may cause the fund to hold a security thatit might otherwise sell. The writer (seller) of an option hasno control over the time when it may be required to fulfillits obligation as a writer (seller) of the option. Once anoption writer (seller) has received an exercise notice, itcannot effect a closing purchase transaction in order toterminate its obligation under the option and must deliverthe underlying security at the exercise price. As the writer(seller) of a covered call option, a fund forgoes, during theoption’s life, the opportunity to profit from increases in themarket value of the security underlying the call optionabove the sum of the premium and the strike price of thecall option, but has retained the risk of loss should theprice of the underlying security decline. The value of theoptions written (sold) by a fund, which will be marked-to-market on a daily basis, will be affected by changes in thevalue and dividend rates of the underlying securities, anincrease in interest rates, changes in the actual orperceived volatil ity of securities markets and theunderlying securities and the remaining time to theoptions’ expiration. The value of the options may also beadversely affected if the market for the options becomesless liquid or smaller. An option is generally considered“covered” if a closed-end fund owns the securityunderlying the call option or has an absolute andimmediate right to acquire that security without additionalcash consideration (or, if required, liquid cash or otherassets are segregated by the fund) upon conversion orexchange of other securities held by the fund. In certaincases, a call option may also be considered covered if afund holds a call option on the same security as the calloption written (sold) provided that certain conditions aremet. By writing (selling) covered call options, a fundgenerally seeks to generate income, in the form of thepremiums received for writing (selling) the call options.Investment income paid by a fund to its shareholders(such as the Portfolio) may be derived primarily from thepremiums it receives from writing (selling) call options and,to a lesser extent, from the dividends and interest it

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receives from the equity securities or other investmentsheld in the fund’s portfolio and short-term gains thereon.Premiums from writing (selling) call options and dividendsand interest payments made by the securities in a fund’sportfolio can vary widely over time.

To the extent that a fund purchases options pursuantto a hedging strategy, the fund will be subject to thefollowing additional risks. If a put or call option purchasedby a fund is not sold when it has remaining value, and ifthe market price of the underlying security remains equalto or greater that the exercise price (in the case of a put),or remains less than or equal to the exercise price (in thecase of a call), the fund will lose its entire investment inthe option. Also, where a put or call option on a particularsecurity is purchased to hedge against price movementsin a related security, the price of the put or call optionmay move more or less than the price of the relatedsecurity. If restrictions on exercise were imposed, thefund might be unable to exercise an option it hadpurchased. If the fund were unable to close out andoption that it had purchased on a security, it would haveto exercise the option in order to realize any profit or theoption may expire worthless.

Preferred Securities Risk. Certain closed-endfunds held by the Global Income Portfolio invest inpreferred securities including preferred stocks, trustpreferred securities or other similar securities.

Preferred stocks are unique securities that combinesome of the characteristics of both common stocks andbonds. Preferred stocks generally pay a fixed rate ofreturn and are sold on the basis of current yield, likebonds. However, because they are equity securities,preferred stocks provide equity ownership of a companyand the income is paid in the form of dividends.Preferred stocks typically have a yield advantage overcommon stocks as well as comparably-rated fixedincome investments. Preferred stocks are typicallysubordinated to bonds and other debt instruments in acompany’s capital structure, in terms of priority tocorporate income, and therefore will be subject togreater credit risk than those debt instruments.

Trust preferred securities are securities typically issuedby corporations, generally in the form of interest-bearing

notes or preferred securities, or by an affiliated businesstrust of a corporation, generally in the form of beneficialinterests in subordinated debentures or similarlystructured securities. Distribution payments of thePortfolio preferred securities generally coincide withinterest payments on the underlying obligations. Trustpreferred securities generally have a yield advantage overtraditional preferred stocks, but unlike preferred stocks, insome cases distributions are treated as interest ratherthan dividends for federal income tax purposes andtherefore, are not eligible for the dividends-receiveddeduction. Trust preferred securities prices fluctuate forseveral reasons including changes in investors’ perceptionof the financial condition of an issuer or the generalcondition of the market for trust preferred securities, orwhen political or economic events affecting the issuersoccur. Trust preferred securities are also sensitive tointerest rate fluctuations, as the cost of capital rises andborrowing costs increase in a rising interest rateenvironment and the risk that a trust preferred securitymay be called for redemption in a falling interest rateenvironment. Certain trust preferred securities are alsosubject to unique risks which include the fact thatdividend payments will only be paid if interest paymentson the underlying obligations are made, which interestpayments are dependent on the financial condition of theissuer and may be deferred. During any deferral period,investors are generally taxed as if they had receivedcurrent income. In such a case, an investor may haveincome taxes due prior to receiving cash distributions topay such taxes. In addition, the underlying obligations,and thus the trust preferred securities, may be pre-paidafter a stated call date or as a result of certain tax orregulatory events. Preferred securities are typicallysubordinated to bonds and other debt instruments in acompany’s capital structure, in terms of priority tocorporate income, and therefore will be subject to greatercredit risk than those debt instruments.

Real Estate Companies. The Global IncomePortfolio is exposed to real estate investment companieswhich consist primarily of real estate investment trusts(“REITs”), and, to a lesser extent, real estate investmentcompanies (“REOCs”) (collectively “real estatecompanies”) through investment in the underlying

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securities in the closed-end funds. You should understandthe risks of real estate companies before you invest. Manyfactors can have an adverse impact on the performanceof a particular real estate company, including its cashavailable for distribution, the credit quality of a particularcompany or the real estate industry generally. Thesuccess of real estate companies depends on variousfactors, including the quality of property management,occupancy and rent levels, appreciation of the underlyingproperty and the ability to raise rents on those properties.Economic recession, over-building, tax law changes,environmental issues, higher interest rates or excessivespeculation can all negatively impact these companies,their future earnings and share prices.

Risks associated with the direct ownership of realestate include, among other factors,

• general U.S. and global as well as localeconomic conditions,

• decline in real estate values,

• possible lack of availability of mortgagefunds,

• the financial health of tenants,

• over-building and increased competition fortenants,

• over-supply of properties for sale,

• changing demographics,

• changes in interest rates, tax rates andother operating expenses,

• changes in government regulations,

• faulty construction and the ongoing needfor capital improvements,

• regulatory and judicial requirements,including relating to l iabil ity forenvironmental hazards,

• the ongoing financial strength and viabilityof government sponsored enterprises,such as Fannie Mae and Freddie Mac,

• changes in neighborhood values and buyerdemand, and

• the unavailability of construction financingor mortgage loans at rates acceptable todevelopers.

Variations in rental income and space availability andvacancy rates in terms of supply and demand areadditional factors affecting real estate generally and realestate companies in particular. Properties owned by acompany may not be adequately insured against certainlosses and may be subject to significant environmentalliabilities, including remediation costs.

You should also be aware that real estate companiesmay not be diversified and are subject to the risks offinancing projects. The real estate industry may becyclical, and, if your Portfolio acquires securities at ornear the top of the cycle, there is increased risk of adecline in value of the securities during the life of yourPortfolio. Real estate companies are also subject todefaults by borrowers and the market’s perception of thereal estate industry generally.

Because of the structure of certain real estatecompanies, and legal requirements in many countriesthat these companies distribute a certain minimumamount of their taxable income to shareholders annually,real estate companies often require frequent amounts ofnew funding, through both borrowing money and issuingstock. Thus, many real estate companies historicallyhave frequently issued substantial amounts of newequity shares (or equivalents) to purchase or build newproperties. This may have adversely affected securitymarket prices. Both existing and new share issuancesmay have an adverse effect on these prices in the future,especially when companies continue to issue stockwhen real estate prices are relatively high and stockprices are relatively low.

Convertible Securities Risk. Certain closed-endfunds held by the Global Income Portfolio may invest inconvertible securities. Convertible securities generallyoffer lower interest or dividend yields than non-convertible fixed-income securities of similar creditquality because of the potential for capital appreciation.The market values of convertible securities tend todecline as interest rates increase and, conversely, toincrease as interest rates decline. However, a convertible

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security’s market value also tends to reflect the marketprice of the common stock of the issuing company,particularly when the stock price is greater than theconvertible security’s conversion price. The conversionprice is defined as the predetermined price or exchangeratio at which the convertible security can be convertedor exchanged for the underlying common stock. As themarket price of the underlying common stock declinesbelow the conversion price, the price of the convertiblesecurity tends to be increasingly influenced more by theyield of the convertible security than by the market priceof the underlying common stock. Thus, it may notdecline in price to the same extent as the underlyingcommon stock, and convertible securities generally haveless potential for gain or loss than common stocks.However, mandatory convertible securities (as discussedbelow) generally do not limit the potential for loss to thesame extent as securities convertible at the option of theholder. In the event of a liquidation of the issuingcompany, holders of convertible securities would be paidbefore that company’s common stockholders.Consequently, an issuer’s convertible securities generallyentail less risk than its common stock. However,convertible securities fall below debt obligations of thesame issuer in order of preference or priority in the eventof a liquidation and are typically unrated or rated lowerthan such debt obligations.

Mandatory convertible securities are distinguished as asubset of convertible securities because the conversion isnot optional and the conversion price at maturity is basedsolely upon the market price of the underlying commonstock, which may be significantly less than par or theprice (above or below par) paid. For these reasons, therisks associated with investing in mandatory convertiblesecurities most closely resemble the risks inherent incommon stocks. Mandatory convertible securitiescustomarily pay a higher coupon yield to compensate forthe potential risk of additional price volatility and lossupon conversion. Because the market price of amandatory convertible security increasingly correspondsto the market price of its underlying common stock asthe convertible security approaches its conversion date,there can be no assurance that the higher coupon willcompensate for the potential loss.

Legislation/Litigation. From time to time, variouslegislative initiatives are proposed in the United Statesand abroad which may have a negative impact oncertain of the companies represented in the Portfolios oron the tax treatment of your Portfolio or of yourinvestment in a Portfolio. In addition, litigation regardingany of the issuers of the Securities or of the industriesrepresented by these issuers may negatively impact theshare prices of these Securities. No one can predictwhat impact any pending or threatened litigation willhave on the share prices of the Securities.

Liquidity Risk. Liquidity risk is the risk that the valueof a security will fall if trading in the security is limited orabsent. The market for certain investments may becomeless liquid or illiquid due to adverse changes in theconditions of a particular issuer or due to adverse marketor economic conditions. In the absence of a liquid tradingmarket for a particular security, the price at which suchsecurity may be sold to meet redemptions, as well as thevalue of the Units of your Portfolio, may be adverselyaffected. No one can guarantee that a liquid tradingmarket will exist for any security.

No FDIC Guarantee. An investment in your Portfoliois not a deposit of any bank and is not insured orguaranteed by the Federal Deposit InsuranceCorporation or any other government agency.

PUBLIC OFFERING

General. Units are offered at the Public OfferingPrice which consists of the net asset value per Unitplus organization costs plus the sales charge. The netasset value per Unit is the value of the securities,cash and other assets in your Portfolio reduced bythe liabilities of the Portfolio divided by the total Unitsoutstanding. The maximum sales charge equals2.75% of the Public Offering Price per Unit (2.828% ofthe aggregate offering price of the Securities) at thetime of purchase.

The initial sales charge is the difference between thetotal sales charge amount (maximum of 2.75% of thePublic Offering Price per Unit) and the sum of theremaining fixed dollar deferred sales charge and thefixed dollar creation and development fee (initially

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$0.275 per Unit). Depending on the Public OfferingPrice per Unit, you pay the initial sales charge at thetime you buy Units. The deferred sales charge is fixedat $0.225 per Unit. Your Portfolio pays the deferredsales charge in installments as described in the “FeeTable.” If any deferred sales charge payment date isnot a business day, we will charge the payment on thenext business day. If you purchase Units after the initialdeferred sales charge payment, you will only pay thatportion of the payments not yet collected. If youredeem or sell your Units prior to collection of the totaldeferred sales charge, you will pay any remainingdeferred sales charge upon redemption or sale of yourUnits. The initial and deferred sales charges arereferred to as the “transactional sales charge.” Thetransactional sales charge does not include thecreation and development fee which compensates theSponsor for creating and developing your Portfolio andis described under “Expenses.” The creation anddevelopment fee is fixed at $0.05 per Unit. YourPortfolio pays the creation and development fee as ofthe close of the initial offering period as described inthe “Fee Table.” If you redeem or sell your Units prior tocollection of the creation and development fee, you willnot pay the creation and development fee uponredemption or sale of your Units. After the initial offeringperiod the maximum sales charge will be reduced by0.50%, reflecting the previous collection of the creationand development fee. Because the deferred salescharge and creation and development fee are fixeddollar amounts per Unit, the actual charges will exceedthe percentages shown in the “Fee Table” if the PublicOffering Price per Unit falls below $10 and will be lessthan the percentages shown in the “Fee Table” if thePublic Offering Price per Unit exceeds $10. In no eventwill the maximum total sales charge exceed 2.75% ofthe Public Offering Price per Unit.

The “Fee Table” shows the sales charge calculationat a $10 Public Offering Price per Unit. At a $10Public Offering Price, there is no initial sales chargeduring the initial offering period. If the Public OfferingPrice exceeds $10 per Unit, you will pay an initialsales charge equal to the difference between the totalsales charge and the sum of the remaining deferred

sales charge and the creation and development fee.For example, if the Public Offering Price per Unit roseto $14, the maximum sales charge would be $0.385(2.75% of the Publ ic Offer ing Pr ice per Uni t ) ,consisting of an initial sales charge of $0.110, adeferred sales charge of $0.225 and the creation anddevelopment fee of $0.050. Since the deferred salescharge and creation and development fee are fixeddollar amounts per Unit, your Portfolio must chargethese amounts per Unit regardless of any decrease innet asset value. However, if the Public Offering Priceper Unit falls to the extent that the maximum salescharge percentage results in a dollar amount that isless than the combined fixed dollar amounts of thedeferred sales charge and creation and developmentfee, your initial sales charge will be a credit equal tothe amount by which these fixed dollar chargesexceed your sales charge at the time you buy Units.In such a situation, the value of securities per Unitwould exceed the Public Offering Price per Unit bythe amount of the initial sales charge credit and thevalue of those securities will fluctuate, which couldresult in a benefit or detriment to Unitholders thatpurchase Units at that price. The initial sales chargecredit is paid by the Sponsor and is not paid by yourPortfolio. If the Public Offering Price per Unit fell to $6,the maximum sales charge would be $0.165 (2.75%of the Public Offering Price per Unit), which consistsof an initial sales charge (credit) of -$0.110, a deferredsales charge of $0.225 and a creat ion anddevelopment fee of $0.050.

The actual sales charge that may be paid by aninvestor may differ slightly from the sales chargesshown herein due to rounding that occurs in thecalculation of the Public Offering Price and in thenumber of Units purchased.

The minimum purchase is 100 Units (25 Units forretirement accounts) but may vary by selling firm.Certain broker-dealers or selling firms may charge anorder handling fee for processing Unit purchases.

Reducing Your Sales Charge. The Sponsoroffers ways for you to reduce the sales charge thatyou pay. It is your financial professional’s responsibilityto alert the Sponsor of any discount when you

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purchase Units. Before you purchase Units you musta lso inform your f inancia l professional of yourqualification for any discount to be eligible for areduced sales charge. Since the deferred salescharges and creation and development fee are fixeddollar amounts per Unit, your Portfolio must chargethese amounts per Unit regardless of any discounts.However, if you are eligible to receive a discount suchthat your total sales charge is less than the fixeddollar amounts of the deferred sales charges andcreation and development fee, you will receive a creditequal to the difference between your total salescharge and these fixed dollar charges at the time youbuy Units.

Fee Accounts. Investors may purchase Units throughregistered investment advisers, certified financialplanners and registered broker-dealers who in eachcase either charge periodic fees for brokerage services,f inancial planning, investment advisory or assetmanagement services, or provide such services inconnection with the establishment of an investmentaccount for which a comprehensive “wrap fee” charge(“Wrap Fee”) is imposed (“Fee Accounts”). If Units of aPortfolio are purchased for a Fee Account and thePortfolio is subject to a Wrap Fee (i.e., the Portfolio is“Wrap Fee Eligible”), then the purchase will not besubject to the transactional sales charge but will besubject to the creation and development fee of $0.05per Unit that is retained by the Sponsor. Please refer tothe section called “Fee Accounts” for additionalinformation on these purchases. The Sponsor reservesthe right to limit or deny purchases of Units described inthis paragraph by investors or selling firms whosefrequent trading activity is determined to be detrimentalto a Portfolio. Wrap Fee Eligible Units are not eligible forany sales charge discounts in addition to that which isdescribed in this paragraph and under the “FeeAccounts” section found below.

Employees. Employees, officers and directors( inc luding thei r spouses (or the equiva lent i frecognized under local law) and children or step-children under 21 l iving in the same household,parents or step-parents and trustees, custodians orfiduciaries for the benefit of such persons) of Invesco

Capital Markets, Inc. and its affiliates, and dealers andtheir aff i l iates may purchase Units at the PublicOffering Price less the applicable dealer concession.All employee discounts are subject to the policies ofthe related selling firm. Only employees, officers anddirectors of companies that allow their employees toparticipate in this employee discount program areeligible for the discounts.

Distribution Reinvestments. We do not charge anysales charge when you reinvest distributions from yourPortfolio into additional Units of your Portfolio. Since thedeferred sales charge and creation and developmentfee are fixed dollar amounts per unit, your Portfolio mustcharge these amounts per unit regardless of thisdiscount. If you elect to reinvest distributions, theSponsor will credit you with additional Units with a dollarvalue sufficient to cover the amount of any remainingdeferred sales charge and creation and developmentfee that will be collected on such Units at the time ofreinvestment. The dollar value of these Units willfluctuate over time.

Unit Price. The Public Offering Price of Units will varyfrom the amounts stated under “Essential Information” inaccordance with fluctuations in the prices of theunderlying Securities in the Portfolios. The initial price ofthe Securities upon deposit by the Sponsor wasdetermined by the Trustee. The Trustee will generallydetermine the value of the Securities as of the EvaluationTime on each business day and will adjust the PublicOffering Price of Units accordingly. The Evaluation Time isthe close of the New York Stock Exchange on eachbusiness day. The term “business day”, as used hereinand under “Rights of Unitholders--Redemption of Units”,means any day on which the New York Stock Exchangeis open for regular trading. The Public Offering Price perUnit will be effective for all orders received prior to theEvaluation Time on each business day. Orders received bythe Sponsor prior to the Evaluation Time and ordersreceived by authorized financial professionals prior to theEvaluation Time that are properly transmitted to theSponsor by the time designated by the Sponsor, arepriced based on the date of receipt. Orders received bythe Sponsor after the Evaluation Time, and ordersreceived by authorized financial professionals after the

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Evaluation Time or orders received by such persons thatare not transmitted to the Sponsor until after the timedesignated by the Sponsor, are priced based on the dateof the next determined Public Offering Price per Unitprovided they are received timely by the Sponsor on suchdate. It is the responsibility of authorized financialprofessionals to transmit orders received by them to theSponsor so they will be received in a timely manner.

The value of portfolio securities is based on thesecurities’ market price when available. When a marketprice is not readily available, including circumstancesunder which the Trustee determines that a security’smarket price is not accurate, a portfolio security is valuedat its fair value, as determined under proceduresestablished by the Trustee or an independent pricingservice used by the Trustee. In these cases, a Portfolio’snet asset value will reflect certain portfolio securities’ fairvalue rather than their market price. With respect tosecurities that are primarily listed on foreign exchanges,the value of the portfolio securities may change on dayswhen you will not be able to purchase or sell Units. Thevalue of any foreign securities is based on the applicablecurrency exchange rate as of the Evaluation Time. TheSponsor will provide price dissemination and oversightservices to the Portfolios.

During the initial offering period, part of the PublicOffering Price represents an amount that will pay thecosts incurred in establishing your Portfolio. Thesecosts include the costs of preparing documents relatingto your Portfolio (such as the registration statement,prospectus, trust agreement and legal documents),federal and state registration fees, the initial fees andexpenses of the Trustee and the initial audit. YourPortfolio will sell securities to reimburse us for thesecosts at the end of the initial offering period or after sixmonths, if earlier. The value of your Units will declinewhen your Portfolio pays these costs.

Unit Distribution. Units will be distributed to thepublic by the Sponsor, broker-dealers and others at thePublic Offering Price. Units repurchased in thesecondary market, if any, may be offered by thisprospectus at the secondary market Public OfferingPrice in the manner described above.

Unit Sales Concessions. Brokers, dealers andothers will be allowed a regular concession or agencycommission in connection with the distribution of Unitsduring the initial offering period of 2.00% of the PublicOffering Price per Unit.

Volume Concession Based Upon Annual Sales. Asdescribed below, broker-dealers and other sellingagents may in certa in cases be e l ig ib le for anadditional concession based upon their annual eligiblesales of all Invesco fixed income and equity unitinvestment trusts. Eligible sales include all units of anyInvesco uni t investment t rust underwr i t ten orpurchased directly from Invesco during a trust’s initialoffering period. For purposes of this concession,trusts designated as either “Invesco Unit Trusts,Taxable Income Series” or “Invesco Unit Trusts,Municipal Series” are fixed income trusts, and trustsdesignated as “Invesco Unit Trusts Series” are equitytrusts. In addition to the regular concessions oragency commissions described above in “Unit SalesConcessions” all broker-dealers and other sellingf i rms wi l l be e l ig ib le to receive addi t ionalcompensation based on total initial offering periodsales of all eligible Invesco unit investment trustsduring the previous consecutive 12-month periodthrough the end of the most recent month. TheVolume Concession, as applicable to equity and fixedincome trust units, is set forth in the following table:

Volume Concession ____________________ Total Sales Equity Trust Fixed Income (in millions) Units Trust Units______________________ ____________ ______________

$25 but less than $100 0.035% 0.035%$100 but less than $150 0.050 0.050$150 but less than $250 0.075 0.075$250 but less than $1,000 0.100 0.100$1,000 but less than $5,000 0.125 0.100$5,000 but less than $7,500 0.150 0.100$7,500 or more 0.175 0.100

Broker-dealers and other selling firms will not receivethe Volume Concession on the sale of units purchased inFee Accounts, however, such sales will be included indetermining whether a firm has met the sales levelbreakpoints set forth in the Volume Concession table

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above. Secondary market sales of all unit investmenttrusts are excluded for purposes of the VolumeConcession. Eligible dealer firms and other selling agentsinclude clearing firms that place orders with Invesco andprovide Invesco with information with respect to therepresentatives who initiated such transactions. Eligibledealer firms and other selling agents will not include firmsthat solely provide clearing services to other broker-dealerfirms or firms who place orders through clearing firms thatare eligible dealers. We reserve the right to change theamount of the concessions or agency commissions fromtime to time. For a trust to be eligible for this additionalcompensation, the trust’s prospectus must includedisclosure related to this additional compensation.

Additional Information. Except as provided in thissection, any sales charge discount provided to investorswill be borne by the selling broker-dealer or agent. For allsecondary market transactions the total concession oragency commission will amount to 80% of the applicablesales charge. Notwithstanding anything to the contraryherein, in no case shall the total of any concessions,agency commissions and any additional compensationallowed or paid to any broker, dealer or other distributor ofUnits with respect to any individual transaction exceed thetotal sales charge applicable to such transaction. TheSponsor reserves the right to reject, in whole or in part,any order for the purchase of Units and to change theamount of the concession or agency commission todealers and others from time to time.

We may provide, at our own expense and out of ourown profits, additional compensation and benefits tobroker-dealers who sell Units of these Portfolios and ourother products. This compensation is intended to resultin additional sales of our products and/or compensatebroker-dealers and financial advisors for past sales. Wemay make these payments for marketing, promotionalor related expenses, including, but not limited to,expenses of entertaining retail customers and financialadvisors, advert ising, sponsorship of events orseminars, obtaining shelf space in broker-dealer firmsand similar activities designed to promote the sale ofthe Portfolios and our other products. Fees may includepayment for travel expenses, including lodging, incurredin connection with trips taken by invited registered

representatives for meetings or seminars of a businessnature. These arrangements will not change the priceyou pay for your Units.

Sponsor Compensation. The Sponsor will receivethe total sales charge applicable to each transaction.Except as provided under “Unit Distribution” above, anysales charge discount provided to investors will be borneby the selling dealer or agent. In addition, the Sponsorwill realize a profit or loss as a result of the differencebetween the price paid for the Securities by the Sponsorand the cost of the Securities to a Portfolio on the InitialDate of Deposit as well as on subsequent deposits. See“Notes to Portfolios”. Invesco Advisers, Inc., an affiliate ofthe Sponsor, acts as investment advisor to certain of theunderlying funds in the Closed-End Strategy: Senior Loanand Limited Duration Portfolio, and wil l receivecompensation in this capacity. The Sponsor has notparticipated as sole underwriter or as manager or as amember of the underwriting syndicates or as an agent ina private placement for any of the Securities. TheSponsor may realize profit or loss as a result of thepossible fluctuations in the market value of Units held bythe Sponsor for sale to the public. In maintaining asecondary market, the Sponsor will realize profits orlosses in the amount of any difference between the priceat which Units are purchased and the price at whichUnits are resold (which price includes the applicable salescharge) or from a redemption of repurchased Units at aprice above or below the purchase price. Cash, if any,made available to the Sponsor prior to the date ofsettlement for the purchase of Units may be used in theSponsor’s business and may be deemed to be a benefitto the Sponsor, subject to the limitations of the SecuritiesExchange Act of 1934, as amended (“1934 Act”).

The Sponsor or an affiliate may have participated ina public offering of one or more of the Securities. TheSponsor, an affiliate or their employees may have along or short position in these Securities or relatedsecurities. An affi l iate may act as a specialist ormarket maker for these Securities. An officer, directoror employee of the Sponsor or an affiliate may be anofficer or director for issuers of the Securities.

Market for Units. Although it is not obligated to doso, the Sponsor may maintain a market for Units and to

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purchase Units at the secondary market repurchaseprice (which is described under “Right of Unitholders--Redemption of Units”). The Sponsor may discontinuepurchases of Units or discontinue purchases at thisprice at any time. In the event that a secondary marketis not maintained, a Unitholder will be able to dispose ofUnits by tendering them to the Trustee for redemptionat the Redemption Price. See “Rights of Unitholders--Redemption of Units”. Unitholders should contact theirbroker to determine the best price for Units in thesecondary market. Units sold prior to the time the entiredeferred sales charge has been collected will beassessed the amount of any remaining deferred salescharge at the time of sale. The Trustee will notify theSponsor of any Units tendered for redemption. If theSponsor’s bid in the secondary market equals orexceeds the Redemption Price per Unit, i t maypurchase the Units not later than the day on whichUnits would have been redeemed by the Trustee. TheSponsor may sell repurchased Units at the secondarymarket Public Offering Price per Unit.

RETIREMENT ACCOUNTS

Units are available for purchase in connection withcertain types of tax-sheltered retirement plans, includingIndividual Retirement Accounts for individuals, SimplifiedEmployee Pension Plans for employees, qualified plansfor self-employed individuals, and qualified corporatepension and profit sharing plans for employees. Theminimum purchase for these accounts is reduced to 25Units but may vary by selling firm. The purchase of Unitsmay be limited by the plans’ provisions and does notitself establish such plans.

FEE ACCOUNTS

As described above, Units may be available forpurchase by investors in Fee Accounts where aPortfolio is Wrap Fee Eligible. You should consult yourfinancial professional to determine whether you canbenefit from these accounts. This table illustrates thesales charge you will pay if a Portfolio is Wrap FeeEligible as a percentage of the initial Public OfferingPrice per Unit on the Initial Date of Deposit (thepercentage will vary thereafter).

Initial sales charge 0.00%Deferred sales charge 0.00 ______ Transactional sales charge 0.00% ______ ______Creation and development fee 0.50% ______ Total sales charge 0.50% ______ ______

You should consult the “Public Offering--ReducingYour Sales Charge” section for specific information onthis and other sales charge discounts. That sectiongoverns the calculation of all sales charge discounts.The Sponsor reserves the r ight to l imit or denypurchases of Units in Fee Accounts by investors orsel l ing f irms whose frequent trading activity isdetermined to be detrimental to a Portfolio. To purchaseUnits in these Fee Accounts, your financial professionalmust purchase Units designated with one of the WrapFee CUSIP numbers set forth under “EssentialInformation,” either Wrap Fee Cash for cashdistributions or Wrap Fee Reinvest for the reinvestmentof distributions in additional Units, if available. See“Rights of Unitholders--Reinvestment Option.”

RIGHTS OF UNITHOLDERS

Distributions. Dividends and interest, net ofexpenses, and any net proceeds from the sale ofSecurities received by a Portfolio will generally bedistributed to Unitholders on each Distribution Date toUnitholders of record on the preceding Record Date.These dates appear under “Essential Information”.Distributions made by the closed-end funds in yourPortfolio include ordinary income, but may also includesources other than ordinary income such as returns ofcapital, loan proceeds, short-term capital gains and long-term capital gains (see “Taxation--Distributions”). Inaddition, your Portfolio will generally make requireddistributions at the end of each year because it isstructured as a “regulated investment company” (“RIC”)for federal tax purposes. Unitholders will also receive afinal distribution of income when their Portfolio terminates.A person becomes a Unitholder of record on the date ofsettlement (generally two business days after Units areordered, or any shorter period as may be required by the

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applicable rules under the 1934 Act). Unitholders mayelect to receive distributions in cash or to havedistributions reinvested into additional Units. See “Rightsof Unitholders--Reinvestment Option”.

Dividends and interest received by a Portfolio arecredited to the Income Account of the Portfolio. Otherreceipts (e.g., capital gains, proceeds from the sale ofSecurities, etc.) are credited to the Capital Account.Proceeds received on the sale of any Securities, to theextent not used to meet redemptions of Units or paydeferred sales charges, fees or expenses, will bedistributed to Unitholders. Proceeds received from thedisposition of any Securities after a Record Date andprior to the following Distribution Date will be held in theCapital Account and not distributed until the nextDistribution Date. Any distribution to Unitholdersconsists of each Unitholder’s pro rata share of theavailable cash in the Income and Capital Accounts as ofthe related Record Date.

Estimated Distributions. The estimated initialdistribution and estimated net annual income per Unitmay be shown under “Essential Information.” Generally,the estimate of the income a Portfolio may receive isbased on the most recent ordinary dividends declared bya closed-end fund. In certain cases, estimated net annualincome may also be based upon several recentlydeclared dividends of a Security. However, the issuers ofany securities in the underlying funds in your Portfolio, aswell as the issuers of the closed-end funds in yourPortfolio, do not assure dividend payments and thereforethe amount of future dividend income to your Portfolio isuncertain. The actual net annual distributions maydecrease over time because a portion of the Securitiesincluded in a Portfolio will be sold to pay for theorganization costs, deferred sales charge and creationand development fee. Securities may also be sold to payregular fees and expenses during a Portfolio’s life. Theactual net annual income distributions you receive willvary from the estimated amount due to changes in aPortfolio’s fees and expenses, in actual income receivedby a Portfolio, currency fluctuations and with changes ina Portfolio such as the acquisition, call, maturity or sale ofSecurities. Due to these and various other factors, actualincome received by a Portfolio will most likely differ from

the most recent dividends or scheduled incomepayments.

Reinvestment Option. Unitholders may havedistributions automatically reinvested in additional Unitswithout a sales charge (to the extent Units may belawfully offered for sale in the state in which theUnitholder resides). The CUSIP numbers for either“Cash” distributions or “Reinvest” for the reinvestment ofdistributions are set forth under “Essential Information”.Brokers and dealers can use the Dividend ReinvestmentService through Depository Trust Company (“DTC”) orpurchase a Reinvest (or Wrap Fee Reinvest in the caseof Wrap Fee Eligible Units held in Fee Accounts) CUSIP,if available. To participate in this reinvestment option, aUnitholder must file with the Trustee a written notice ofelection, together with any other documentation that theTrustee may then require, at least five days prior to therelated Record Date. A Unitholder’s election will apply toall Units owned by the Unitholder and will remain ineffect until changed by the Unitholder. The reinvestmentoption is not offered during the 30 calendar days prior totermination. If Units are unavailable for reinvestment orthis reinvestment option is no longer available,distributions will be paid in cash. Distributions will betaxable to Unitholders if paid in cash or automaticallyreinvested in additional Units. See “Taxation”.

A participant may elect to terminate his or herreinvestment plan and receive future distributions in cashby notifying the Trustee in writing no later than five daysbefore a Distribution Date. The Sponsor shall have theright to suspend or terminate the reinvestment plan atany time. The reinvestment plan is subject to availabilityor limitation by each broker-dealer or selling firm. Broker-dealers may suspend or terminate the offering of areinvestment plan at any time. Please contact yourfinancial professional for additional information.

Redemption of Units. All or a portion of your Unitsmay be tendered to The Bank of New York Mellon, theTrustee, for redemption at Unit Investment Trust Division,111 Sanders Creek Parkway, East Syracuse, New York13057, on any day the New York Stock Exchange isopen. No redemption fee will be charged by the Sponsoror the Trustee, but you are responsible for applicablegovernmental charges, if any. Units redeemed by the

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Trustee will be canceled. You may redeem all or a portionof your Units by sending a request for redemption to yourbank or broker-dealer through which you hold your Units.No later than two business days (or any shorter period asmay be required by the applicable rules under the 1934Act) following satisfactory tender, the Unitholder will beentitled to receive in cash an amount for each Unit equalto the Redemption Price per Unit next computed on thedate of tender. The “date of tender” is deemed to be thedate on which Units are received by the Trustee, exceptthat with respect to Units received by the Trustee afterthe Evaluation Time or on a day which is not a businessday, the date of tender is deemed to be the nextbusiness day. Redemption requests received by theTrustee after the Evaluation Time, and redemptionrequests received by authorized financial professionalsafter the Evaluation Time or redemption requestsreceived by such persons that are not transmitted to theTrustee until after the time designated by the Trustee, arepriced based on the date of the next determinedredemption price provided they are received timely by theTrustee on such date. It is the responsibility of authorizedfinancial professionals to transmit redemption requestsreceived by them to the Trustee so they will be receivedin a timely manner. Certain broker-dealers or selling firmsmay charge an order handling fee for processingredemption requests. Units redeemed directly throughthe Trustee are not subject to such fees.

Unitholders tendering 1,000 or more Units (or suchhigher amount as may be required by your broker-dealer or selling agent) for redemption may request anin kind distr ibution of Securit ies equal to theRedemption Price per Unit on the date of tender.Unitholders may not request an in kind distributionduring the initial offering period or within 30 calendardays of a Portfolio’s termination. The Portfolios generallywill not offer in kind distributions of portfolio securitiesthat are held in foreign markets. An in kind distributionwill be made by the Trustee through the distribution ofeach of the Securities in book-entry form to the accountof the Unitholder’s broker-dealer at DTC. Amountsrepresenting fractional shares will be distributed in cash.The Trustee may adjust the number of shares of anySecurity included in a Unitholder’s in kind distribution to

facilitate the distribution of whole shares. The in kinddistribution option may be modified or discontinued atany time without notice. Notwithstanding the foregoing,if the Unitholder requesting an in kind distribution is theSponsor or an affiliated person of the Portfolio, theTrustee may make an in kind distribution to suchUnitholder provided that no one with a pecuniaryincentive to influence the in kind distribution mayinfluence selection of the distributed securities, thedistribution must consist of a pro rata distribution of allportfolio securities (with limited exceptions) and the inkind distribution may not favor such affiliated person tothe detriment of any other Unitholder. Unitholders willincur transaction costs in liquidating securities receivedin an in-kind distribution, and any such securitiesreceived will be subject to market risk until sold. In theevent that any securities received in-kind are illiquid,Unitholders will bear the risk of not being able to sellsuch securities in the near term, or at all.

The Trustee may sell Securities to satisfy Unitredemptions. To the extent that Securit ies areredeemed in kind or sold, the size of a Portfolio will be,and the diversity of the Portfolio may be, reduced. Salesmay be required at a time when Securities would nototherwise be sold and may result in lower prices thanmight otherwise be realized. The price received uponredemption may be more or less than the amount paidby the Unitholder depending on the value of theSecurities at the time of redemption. Special federalincome tax consequences will result if a Unitholderrequests an in kind distribution. See “Taxation”.

The Redemption Price per Unit and the secondarymarket repurchase price per Unit are equal to the prorata share of each Unit in your Portfolio determined onthe basis of (i) the cash on hand in the Portfolio, (ii) thevalue of the Securities in the Portfolio and (iii) dividendsor other income distr ibutions receivable on theSecurities in the Portfolio trading ex-dividend as of thedate of computation, less (a) amounts representingtaxes or other governmental charges payable out of thePortfolio, (b) the accrued expenses of the Portfolio(including costs associated with liquidating securitiesafter the end of the initial offering period) and (c) anyunpaid deferred sales charge payments. During the

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initial offering period, the redemption price and thesecondary market repurchase price will not be reducedby estimated organization costs or the creation anddevelopment fee. For these purposes, the Trustee willdetermine the value of the Securities as describedunder “Public Offering--Unit Price.”

The right of redemption may be suspended andpayment postponed for any period during which theNew York Stock Exchange is closed, other than forcustomary weekend and holiday closings, or anyperiod during which the SEC determines that tradingon that Exchange is restricted or an emergencyexists, as a result of which disposal or evaluation ofthe Securities is not reasonably practicable, or forother periods as the SEC may permit.

Exchange Option. When you redeem Units of yourPortfolio or when your Portfolio terminates (see “Rollover”below), you may be able to exchange your Units for unitsof other Invesco unit trusts. You should contact yourfinancial professional for more information about trustscurrently available for exchanges. Before you exchangeUnits, you should read the prospectus of the new trustcarefully and understand the risks and fees. You shouldthen discuss this option with your financial professional todetermine whether your investment goals have changed,whether current trusts suit you and to discuss taxconsequences. A rollover or exchange is a taxable eventto you. We may discontinue this option at any time.

Rollover. We may offer a subsequent series of eachPortfolio for a Rollover when the Portfolios terminate.

On the Mandatory Termination Date you will have theoption to (1) participate in a Rollover and have yourUnits reinvested into a subsequent trust series or (2) receive a cash distribution.

If you elect to participate in a cash Rollover, yourUnits will be redeemed on the Mandatory TerminationDate. As the redemption proceeds become available,the proceeds (including dividends) will be invested ina new trust series at the public offering price for thenew trust. The Trustee will attempt to sell Securities tosatisfy the redemption as quickly as practicable onthe Mandatory Termination Date. We do not anticipatethat the sale period will be longer than one day,

however, certain factors could affect the ability to sellthe Securities and could impact the length of the saleperiod. The liquidity of any Security depends on thedaily trading volume of the Security and the amountavailable for redemption and reinvestment on any day.

We may make subsequent trust series available forsale at various times during the year. Of course, wecannot guarantee that a subsequent trust or sufficientunits will be available or that any subsequent trusts willoffer the same investment strategies or objectives as thecurrent Portfolios. We cannot guarantee that a Rolloverwill avoid any negative market price consequencesresulting from trading large volumes of securities. Marketprice trends may make it advantageous to sell or buysecurities more quickly or more slowly than permitted bythe Portfolio procedures. We may, in our sole discretion,modify a Rollover or stop creating units of a trust at anytime regardless of whether all proceeds of Unitholdershave been reinvested in a Rollover. If we decide not tooffer a subsequent series, Unitholders will be notifiedprior to the Mandatory Termination Date. Cash whichhas not been reinvested in a Rollover will be distributedto Unitholders shortly after the Mandatory TerminationDate. Rollover participants may receive taxabledividends or realize taxable capital gains which arereinvested in connection with a Rollover but may not beentitled to a deduction for capital losses due to the“wash sale” tax rules. Due to the reinvestment in asubsequent trust, no cash will be distributed to pay anytaxes. See “Taxation”.

Units. Ownership of Uni ts is ev idenced inbook-entry form only and will not be evidenced bycertificates. Units purchased or held through yourbank or broker-dealer will be recorded in book-entryform and credited to the account of your bank orbroker-dealer at DTC. Units are transferable bycontacting your bank or broker-dealer through whichyou hold your Units. Transfer, and the requirementstherefore, wi l l be governed by the appl icableprocedures of DTC and your agreement with the DTCparticipant in whose name your Units are registeredon the transfer records of DTC.

Reports Provided. Unitholders will receive astatement of dividends and other amounts received by

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a Portfolio for each distribution. Within a reasonabletime after the end of each year, each person who was aUnitholder during that year will receive a statementdescribing dividends and capital received, actualPortfolio distributions, Portfolio expenses, a list of theSecurities and other Portfolio information. Unitholdersmay obtain evaluations of the Securities upon requestto the Trustee. If you have questions regarding youraccount or your Portfolio, please contact your financialadvisor or the Trustee. The Sponsor does not haveaccess to individual account information.

PORTFOLIO ADMINISTRATION

Portfolio Administration. The Portfolios are notmanaged funds and, except as provided in the TrustAgreement, Securities generally will not be sold orreplaced. The Sponsor may, however, direct thatSecurities be sold in certain limited circumstances toprotect a Portfolio based on advice from the Supervisor.These situations may include events such as the issuerhaving defaulted on payment of any of its outstandingobligations or the price of a Security has declined tosuch an extent or other credit factors exist so that in theopinion of the Supervisor retention of the Security wouldbe detrimental to a Portfolio. If a public tender offer hasbeen made for a Security or a merger or acquisition hasbeen announced affecting a Security, the Trustee mayeither sel l the Security or accept an offer i f theSupervisor determines that the sale or exchange is inthe best interest of Unitholders. The Trustee willdistribute any cash proceeds to Unitholders. In addition,the Trustee may sell Securities to redeem Units or payPortfol io expenses or deferred sales charges. Ifsecurities or property are acquired by a Portfolio, theSponsor may direct the Trustee to sell the securities orproperty and distribute the proceeds to Unitholders orto accept the securities or property for deposit in thePortfolio. Should any contract for the purchase of any ofthe Securities fail, the Sponsor will (unless substantiallyall of the moneys held in a Portfolio to cover thepurchase are reinvested in substitute Securities inaccordance with the Trust Agreement) refund the cashand sales charge attributable to the failed contract to allUnitholders on or before the next Distribution Date.

The Sponsor may direct the reinvestment of proceedsof the sale of Securities if the sale is the direct result ofserious adverse credit factors which, in the opinion of theSponsor, would make retention of the Securitiesdetrimental to your Portfolio. In such a case, the Sponsormay, but is not obligated to, direct the reinvestment ofsale proceeds in any other securities that meet thecriteria for inclusion in your Portfolio on the Initial Date ofDeposit. The Sponsor may also instruct the Trustee totake action necessary to ensure that your Portfoliocontinues to satisfy the qualifications of a regulatedinvestment company and to avoid imposition of tax onundistributed income of the Portfolio.

The Trust Agreement requires the Trustee to vote allshares of the funds held in a Portfolio in the samemanner and ratio on all proposals as the owners ofsuch shares not held by the Portfolio.

When your Portfolio sells Securities, the compositionand diversity of the Securities in the Portfolio may bealtered. However, if the Trustee sells fund shares toredeem Units or to pay Portfolio expenses or salescharges, the Trustee will do so, as nearly as practicable,on a pro rata basis. In order to obtain the best price forthe Portfolio, it may be necessary for the Supervisor tospecify minimum amounts in which blocks of Securitiesare to be sold. In effecting purchases and sales ofportfolio securities, the Sponsor may direct that ordersbe placed with and brokerage commissions be paid tobrokers, including brokers which may be affiliated with aPortfolio, the Sponsor or dealers participating in theoffering of Units.

Pursuant to an exemptive order, a Portfolio may bepermitted to sell Securities to a new trust when itterminates if those Securities are included in the newtrust. The exemption may enable a Portfolio to eliminatecommission costs on these transactions. The price forthose securities will be the closing sale price on the saledate on the exchange where the Securit ies areprincipally traded, as certified by the Sponsor.

Amendment of the Trust Agreement. TheTrustee and the Sponsor may amend the TrustAgreement without the consent of Unitholders tocorrect any provision which may be defective or to

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make other provisions that will not materially adverselyaffect Unitholders (as determined in good faith by theSponsor and the Trustee). The Trust Agreement maynot be amended to increase the number of Units orpermit acquisit ion of securit ies in addition to orsubstitution for the Securities (except as provided in theTrust Agreement). The Trustee will notify Unitholders ofany amendment.

Termination. Your Portfolio will terminate on theMandatory Termination Date specified under “EssentialInformation” or upon the sale or other disposition of thelast Security held in the Portfolio. Your Portfolio may beterminated at any time with consent of Unitholdersrepresenting two-thirds of the outstanding Units or by theTrustee when the value of the Portfolio is less than$500,000 ($3,000,000 if the value of the Portfolio hasexceeded $15,000,000) (the “Minimum TerminationValue”). Your Portfolio will be liquidated by the Trustee inthe event that a sufficient number of Units of the Portfolionot yet sold are tendered for redemption by the Sponsor,so that the net worth of the Portfolio would be reduced toless than 40% of the value of the Securities at the timethey were deposited in the Portfolio. If your Portfolio isliquidated because of the redemption of unsold Units bythe Sponsor, the Sponsor will refund to each purchaser ofUnits the entire sales charge paid by such purchaser. TheTrustee may begin to sell Securities in connection with aPortfolio termination nine business days before, and nolater than, the Mandatory Termination Date. QualifiedUnitholders may elect an in kind distribution of Securities,provided that Unitholders may not request an in kinddistribution of Securities within 30 calendar days of aPortfolio’s termination. Any in kind distribution ofSecurities will be made in the manner and subject to therestrictions described under “Rights of Unitholders--Redemption of Units”, provided that, in connection withan in kind distribution election more than 30 calendardays prior to termination, Unitholders tendering 1,000 ormore Units of a Portfolio (or such higher amount as maybe required by your broker-dealer or selling agent) mayrequest an in kind distribution of Securities equal to theRedemption Price per Unit on the date of tender.Unitholders will receive a final cash distribution within areasonable time after the Mandatory Termination Date. All

distributions will be net of Portfolio expenses and costs.Unitholders will receive a final distribution statementfollowing termination. The Information Supplementcontains further information regarding termination of yourPortfolio. See “Additional Information”.

Limitations on Liabilities. The Sponsor,Supervisor and Trustee are under no liability for takingany action or for refraining from taking any action ingood faith pursuant to the Trust Agreement, or for errorsin judgment, but shall be liable only for their own willfulmisfeasance, bad faith or gross negligence (negligencein the case of the Trustee) in the performance of theirduties or by reason of their reckless disregard of theirobligations and duties hereunder. The Trustee is notliable for depreciation or loss incurred by reason of thesale by the Trustee of any of the Securities. In the eventof the failure of the Sponsor to act under the TrustAgreement, the Trustee may act thereunder and is notliable for any action taken by it in good faith under theTrust Agreement. The Trustee is not liable for any taxesor other governmental charges imposed on theSecurities, on it as Trustee under the Trust Agreement oron a Portfolio which the Trustee may be required to payunder any present or future law of the United States ofAmerica or of any other taxing authority havingjurisdiction. In addition, the Trust Agreement containsother customary provisions limiting the liability of theTrustee. The Sponsor and Supervisor may rely on anyevaluation furnished by the Trustee and have noresponsibility for the accuracy thereof. Determinationsby the Trustee shall be made in good faith upon thebasis of the best information available to it.

Sponsor. Invesco Capital Markets, Inc. is theSponsor of your Portfolio. The Sponsor is a wholly ownedsubsidiary of Invesco Advisers, Inc. (“Invesco Advisers”).Invesco Advisers is an indirect wholly owned subsidiary ofInvesco Ltd., a leading independent global investmentmanager that provides a wide range of investmentstrategies and vehicles to its retail, institutional and highnet worth clients around the globe. The Sponsor’sprincipal office is located at 11 Greenway Plaza, Houston,Texas 77046-1173. As of September 30, 2017, the totalstockholders’ equity of Invesco Capital Markets, Inc. was$99,220,878.98 (unaudited). The current assets under

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management and supervision by Invesco Ltd. and itsaffiliates were valued at approximately $917.5 billion as ofSeptember 30, 2017.

The Sponsor and your Portfolio have adopted a codeof ethics requiring Invesco Ltd.’s employees who haveaccess to information on Portfolio transactions to reportpersonal securities transactions. The purpose of thecode is to avoid potential conflicts of interest and toprevent fraud, deception or misconduct with respect toyour Portfolio. The Information Supplement containsadditional information about the Sponsor.

If the Sponsor shall fail to perform any of its dutiesunder the Trust Agreement or become incapable ofacting or shall become bankrupt or its affairs are takenover by public authorities, then the Trustee may (i) appoint a successor Sponsor at rates of compensationdeemed by the Trustee to be reasonable and notexceeding amounts prescribed by the SEC, (ii) terminatethe Trust Agreement and liquidate your Portfolio asprovided therein or (iii) continue to act as Trustee withoutterminating the Trust Agreement.

Trustee. The Trustee is The Bank of New YorkMellon, a trust company organized under the laws ofNew York. The Bank of New York Mellon has itsprincipal unit investment trust division offices at 2 Hanson Place, 12th Floor, Brooklyn, New York11217, (800) 856-8487. I f you have quest ionsregarding your account or your Portfolio, pleasecontact the Trustee at its principal unit investment trustdivision offices or your financial adviser. The Sponsordoes not have access to indiv idual accountinformation. The Bank of New York Mellon is subject tosupervision and examination by the Superintendent ofBanks of the State of New York and the Board ofGovernors of the Federal Reserve System, and itsdeposits are insured by the Federal Deposit InsuranceCorporation to the extent permitted by law. Additionalinformation regarding the Trustee is set forth in theInformation Supplement, including the Trustee’squalifications and duties, its ability to resign, the effectof a merger involving the Trustee and the Sponsor’sabi l i ty to remove and replace the Trustee. See“Additional Information”.

TAXATION

This section summarizes some of the principal U.S.federal income tax consequences of owning Units ofthe Portfolios as of the date of this prospectus. Taxlaws and interpretations are subject to change,possibly with retroactive effect, and this summarydoes not describe all of the tax consequences to alltaxpayers. For example, this summary generally doesnot describe your situation if you are a corporation, anon-U.S. person, a broker/dealer, a tax-exempt entity,financial institution, person who marks to market theirUnits or other investor with special circumstances. Inaddi t ion, th is sect ion does not descr ibe youralternative minimum, state, local or foreign taxconsequences of investing in a Portfolio.

This federal income tax summary is based in parton the advice of counsel to the Sponsor. The InternalRevenue Service could disagree with any conclusionsset forth in this section. In addition, our counsel wasnot asked to review the federal income tax treatmentof the assets to be deposited in your Portfolio.

Additional information related to taxes is contained inthe Information Supplement. As with any investment,you should seek advice based on your individualcircumstances from your own tax advisor.

Portfolio Status. Your Portfolio intends to elect andto qualify annually as a “regulated investment company”(“RIC”) under the federal tax laws. If your Portfolioqualifies under the tax law as a RIC and distributes itsincome in the manner and amounts required by the RICtax requirements, the Portfolio generally will not payfederal income taxes. But there is no assurance that thedistributions made by your Portfolio will eliminate alltaxes for every year at the level of your Portfolio.

Distributions. Portfolio distributions are generallytaxable to you. After the end of each year, you will receivea tax statement reporting your Portfolio’s distributions,including the amounts of ordinary income distributionsand capital gains dividends. Your Portfolio may maketaxable distributions to you even in periods during whichthe value of your Units has declined. Ordinary incomedistributions are generally taxed at your federal tax ratefor ordinary income, however, as further discussed below,

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certain ordinary income distributions received from yourPortfolio may be taxed, under current federal law, at thecapital gains tax rates. Income from the Portfolio andgains on the sale of your Units may also be subject to a3.8% federal tax imposed generally on net investmentincome if your adjusted gross income exceeds certainthreshold amounts, which are $250,000 in the case ofmarried couples filing joint returns and $200,000 in thecase of single individuals. In addition, your Portfolio maymake distributions that represent a return of capital for taxpurposes to the extent of the Unitholder’s basis in theUnits, and any additional amounts in excess of basiswould be taxed as a capital gain. Generally, you will treatall capital gains dividends as long-term capital gainsregardless of how long you have owned your Units. Thetax status of your distributions from your Portfolio is notaffected by whether you reinvest your distributions inadditional Units or receive them in cash. The income fromyour Portfolio that you must take into account for federalincome tax purposes is not reduced by amounts used topay a deferred sales charge, if any. The tax laws mayrequire you to treat certain distributions made to you inJanuary as if you had received them on December 31 ofthe previous year.

A distribution paid by your Portfolio reduces thePortfolio’s net asset value per Unit on the date paid bythe amount of the distribution. Accordingly, a distributionpaid shortly after a purchase of Units by a Unitholderwould represent, in substance, a partial return of capital,however, it would be subject to income taxes.

Sale or Redemption of Units. If you sell or redeemyour Units, you will generally recognize a taxable gain orloss. To determine the amount of this gain or loss, youmust subtract your adjusted tax basis in your Units fromthe amount you receive in the transaction. Your initial taxbasis in your Units is generally equal to the cost of yourUnits, generally including sales charges. In some cases,however, you may have to adjust your tax basis after youpurchase your Units.

Capital Gains and Losses and CertainOrdinary Income Dividends. Net capital gainequals net long-term capital gain minus net short-term capital loss for the taxable year. Capital gain orloss is long-term if the holding period for the asset is

more than one year and is short-term if the holdingperiod for the asset is one year or less. You mustexclude the date you purchase your Uni ts todetermine your holding period. However, if you receivea capital gain dividend from your Portfolio and sellyour Units at a loss after holding it for six months orless, the loss will be recharacterized as long-termcapital loss to the extent of the capital gain dividendreceived. The tax rates for capital gains realized fromassets held for one year or less are generally thesame as for ordinary income.

In certain circumstances, ordinary income dividendsreceived by an individual Unitholder from a regulatedinvestment company such as your Portfolio may betaxed at the same federal rates that apply to net capitalgain (as discussed above), provided certain holdingperiod requirements are satisfied and provided thedividends are attributable to qualified dividend incomereceived by the Portfolio itself. Your Portfolio will providenotice to its Unitholders of the amount of anydistribution which may be taken into account asqualified dividend income which is eligible for the capitalgains tax rates. However, based on the investmentstrategy of your Portfolio it is likely that few, if any, of itsdistributions will be eligible for the tax rates applicable toqualified dividends. There is no requirement that taxconsequences be taken into account in administeringyour Portfolio.

In Kind Distributions. Under certain circumstances,as described in this prospectus, you may receive an inkind distribution of Portfolio securities when you redeemyour Units. In general, this distribution will be treated as asale for federal income tax purposes and you willrecognize gain or loss, based on the value at that time ofthe securities and the amount of cash received, andsubject to certain limitations on the deductibility of lossesunder the tax rules.

Rollovers and Exchanges. If you elect to haveyour proceeds from your Portfolio rolled over into a futuretrust, it would generally be considered a sale for federalincome tax purposes and any gain on the sale will betreated as a capital gain, and, in general, any loss will betreated as a capital loss. However, any loss realized on asale or exchange will be disallowed to the extent that

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Units disposed of are replaced (including throughreinvestment of dividends) within a period of 61 daysbeginning 30 days before and ending 30 days afterdisposition of Units or to the extent that the Unitholder,during such period, acquires or enters into an option orcontract to acquire, substantially identical stock orsecurities. In such a case, the basis of the Units acquiredwill be adjusted to reflect the disallowed loss.

Deductibility of Portfolio Expenses. Expensesincurred and deducted by your Portfolio will generallynot be treated as income taxable to you. In some cases,however, you may be required to treat your portion ofthese Portfolio expenses as income. In these cases youmay be able to take a deduction for these expenses.However, certain miscellaneous itemized deductions,such as investment expenses, may be deducted byindividuals only to the extent that all of these deductionsexceed 2% of the individual’s adjusted gross income.Such deductions may be subject to limitation fortaxpayers whose income exceeds certain levels.

Foreign Investors. If you are a foreign investor (i.e.,an investor other than a U.S. citizen or resident or aU.S. corporation, partnership, estate or trust), generally,subject to applicable tax treaties, distributions to youfrom your Portfolio will be characterized as dividends forfederal income tax purposes (other than dividends thatyour Portfolio reports as capital gain dividends) and willbe subject to U.S. income taxes, including withholdingtaxes, subject to certain exceptions described below.You may be eligible under certain income tax treaties fora reduction in withholding rates. However, distributionsreceived by a foreign investor from your Portfolio thatare properly reported by the trust as capital gaindividends may not be subject to U.S. federal incometaxes, including withholding taxes, provided that yourPortfolio makes certain elections and certain otherconditions are met.

The Foreign Account Tax Compliance Act(“FATCA”). A 30% withholding tax on your Portfolio’sdistributions, including capital gains distributions, and ongross proceeds from the sale or other disposition ofUnits generally applies if paid to a foreign entity unless: (i)if the foreign entity is a “foreign financial institution” asdefined under FATCA, the foreign entity undertakes

certain due diligence, reporting, withholding, andcertification obligations, (ii) if the foreign entity is not a“foreign financial institution,” it identifies certain of its U.S.investors or (iii) the foreign entity is otherwise exceptedunder FATCA. If required under the rules above andsubject to the applicability of any intergovernmentalagreements between the United States and the relevantforeign country, withholding under FATCA applies: (i) withrespect to distributions from your Portfolio and (ii) withrespect to certain capital gains distributions and grossproceeds from a sale or disposition of Units that occuron or after January 1, 2019. If withholding is requiredunder FATCA on a payment related to your Units,investors that otherwise would not be subject towithholding (or that otherwise would be entitled to areduced rate of withholding) on such payment generallywill be required to seek a refund or credit from the IRS toobtain the benefit of such exemption or reduction. YourPortfolio will not pay any additional amounts in respect ofamounts withheld under FATCA. You should consult yourtax advisor regarding the effect of FATCA based on yourindividual circumstances.

Foreign Tax Credit. If your Portfolio invests in anyforeign securities, the tax statement that you receivemay include an item showing foreign taxes yourPortfolio paid to other countries. In this case, dividendstaxed to you will include your share of the taxes yourPortfolio paid to other countries. You may be able todeduct or receive a tax credit for your share of thesetaxes if your Portfolio meets certain requirements forpassing through such deductions or credits to you.

Backup Withholding. By law, your Portfolio mustwithhold as backup withholding a percentage (currently28%) of your taxable distributions and redemptionproceeds if you do not provide your correct socialsecurity or taxpayer identification number and certifythat you are not subject to backup withholding, or if theIRS instructs your Portfolio to do so.

Investors should consult their advisors concerningthe federal, state, local and foreign tax consequences ofinvesting in a Portfolio.

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PORTFOLIO OPERATING EXPENSES

General. The fees and expenses of your Portfoliowill generally accrue on a daily basis. Portfolio operatingfees and expenses are generally paid out of the IncomeAccount to the extent funds are available, and then fromthe Capital Account. The deferred sales charge,creation and development fee and organization costsare generally paid out of the Capital Account of yourPortfolio. It is expected that Securities will be sold topay these amounts which will result in capital gains orlosses to Unitholders. See “Taxation”. These sales willreduce future income distributions. The Sponsor’s,Supervisor’s and Trustee’s fees may be increasedwithout approval of the Unitholders by amounts notexceeding proportionate increases under the category“Services Less Rent of Shelter” in the Consumer PriceIndex for All Urban Consumers or, if this category is notpublished, in a comparable category.

Organization Costs. You and the other Unitholderswill bear all or a portion of the organization costs andcharges incurred in connection with the establishmentof your Portfolio. These costs and charges will includethe cost of the preparation, printing and execution of thetrust agreement, registration statement and otherdocuments relating to your Portfolio, federal and stateregistration fees and costs, the initial fees and expensesof the Trustee, and legal and auditing expenses. ThePublic Offering Price of Units includes the estimatedamount of these costs. The Trustee will deduct theseexpenses from your Portfolio’s assets at the end of theinitial offering period.

Creation and Development Fee. The Sponsorwill receive a fee from your Portfolio for creating anddeveloping the Portfolio, including determining thePortfolio’s objectives, policies, composition and size,selecting service providers and information services andfor providing other similar administrative and ministerialfunctions. The creation and development fee is a chargeof $0.05 per Unit. The Trustee will deduct this amountfrom your Portfolio’s assets as of the close of the initialoffering period. No portion of this fee is applied to thepayment of distribution expenses or as compensationfor sales efforts. This fee will not be deducted from

proceeds received upon a repurchase, redemption orexchange of Units before the close of the initial publicoffering period.

Trustee’s Fee. For its services the Trustee willreceive the fee from your Portfolio set forth in the “FeeTable” (which includes the estimated amount ofmiscel laneous Portfol io expenses). The Trusteebenefits to the extent there are funds in the Capitaland Income Accounts since these Accounts are non-interest bearing to Unitholders and the amountsearned by the Trustee are retained by the Trustee.Part of the Trustee’s compensation for its services toyour Portfolio is expected to result from the use ofthese funds.

Compensation of Sponsor and Supervisor. TheSponsor and the Supervisor, which is an affiliate of theSponsor, will receive the annual fees for providingbookkeeping and administrative services and portfoliosupervisory services set forth in the “Fee Table”. Thesefees may exceed the actual costs of providing theseservices to your Portfolio but at no time will the totalamount received for these services rendered to all Invescounit investment trusts in any calendar year exceed theaggregate cost of providing these services in that year.

Miscellaneous Expenses. The following additionalcharges are or may be incurred by your Portfolio: (a)normal expenses (including the cost of mailing reportsto Unitholders) incurred in connection with the operationof the Portfolio, (b) fees of the Trustee for extraordinaryservices, (c) expenses of the Trustee (including legal andauditing expenses) and of counsel designated by theSponsor, (d) various governmental charges, (e)expenses and costs of any action taken by the Trusteeto protect the Portfolio and the rights and interests ofUnitholders, (f) indemnification of the Trustee for anyloss, liability or expenses incurred in the administrationof the Portfolio without negligence, bad faith or wilfulmisconduct on its part, (g) foreign custodial andtransaction fees (which may include compensation paidto the Trustee or its subsidiaries or affiliates), (h) costsassociated with liquidating the securities held in thePortfolio, (i) any offering costs incurred after the end ofthe initial offering period and (j) expenditures incurred incontacting Unitholders upon termination of the Portfolio.

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Your Portfolio may pay the expenses of updating itsregistration statement each year.

Fund Expenses. Each Portfolio will also bear theexpenses of the underlying funds. While your Portfoliowill not pay these expenses directly out of its assets,an estimate of these expenses is shown in yourPortfolio’s “Estimated Annual Expenses” in the “FeeTable” to illustrate the impact of these expenses. Thisestimate is based upon each underlying fund’s annualoperating expenses for the most recent fiscal year.Each underlying fund’s annual operating expenseamount is subject to change in the future.

OTHER MATTERS

Legal Opinions. The legality of the Units offeredhereby has been passed upon by Paul Hastings LLP.Dorsey & Whitney LLP has acted as counsel to theTrustee.

Independent Registered Public AccountingFirm. The statements of condition and the relatedportfolios included in this prospectus have beenaudited by Grant Thornton LLP, independentregistered public accounting firm, as set forth in theirreport in this prospectus, and are included herein inreliance upon the authority of said firm as experts inaccounting and auditing.

ADDITIONAL INFORMATION

This prospectus does not contain all the informationset forth in the registration statements filed by yourPortfolio with the SEC under the Securities Act of 1933and the Investment Company Act of 1940 (file no.811-2754). The Information Supplement, which hasbeen filed with the SEC and is incorporated herein byreference, includes more detai led informationconcerning the Securities, investment risks and generalinformation about the Portfolios. Information about yourPortfolio (including the Information Supplement) can bereviewed and copied at the SEC’s Public ReferenceRoom in Washington, DC. You may obtain informationabout the Public Reference Room by calling 1-202-551-8090. Reports and other information about yourPortfolio are available on the EDGAR Database on the

SEC’s Internet site at http://www.sec.gov. Copies ofthis information may be obtained, after paying aduplication fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing theSEC’s Public Reference Section, Washington, DC20549-0102.

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TABLE OF CONTENTS

Title Page

Closed-End Strategy: Senior Loan and Limited Duration Portfolio ........................................... 2

Closed-End Strategy: Global Income Portfolio ... 6Notes to Portfolios ............................................. 12Report of Independent Registered

Public Accounting Firm .................................. 13Statements of Condition ................................... 14The Portfolios..................................................... A-1Objectives and Securities Selection.................... A-2Closed-End Funds ............................................. A-2Risk Factors....................................................... A-2Public Offering ................................................... A-8Retirement Accounts ......................................... A-13Fee Accounts..................................................... A-13Rights of Unitholders.......................................... A-13Portfolio Administration ...................................... A-17Taxation ............................................................. A-19Portfolio Operating Expenses............................. A-22Other Matters .................................................... A-23Additional Information ........................................ A-23

______________When Units of the Portfolios are no longer available thisprospectus may be used as a preliminary prospectus for afuture Portfolio. If this prospectus is used for future Portfoliosyou should note the following:

The information in this prospectus is not complete with respectto future Portfolio series and may be changed. No person maysell Units of future Portfolios until a registration statement isfiled with the Securities and Exchange Commission and iseffective. This prospectus is not an offer to sell Units and is notsoliciting an offer to buy Units in any state where the offer orsale is not permitted.

U-EMSPRO1811

PROSPECTUS

October 20, 2017

Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2017-4

Closed-End Strategy:Global Income Portfolio 2017-4

Please retain this prospectus for future reference.

INVESCO