Dividend Sustainability Buy-Write Portfolio 2019-4

The unit investment trust named above (the “Portfolio”) included in Invesco Unit Trusts, Series 2007 seeks to provideincome with the potential for limited capital appreciation by investing in a portfolio of common stocks of companies witha history of increasing dividend distributions, U.S. Treasury Obligations and call options on these common stocksknown as Long Term Equity AnticiPation Securities® (“LEAPS”). Of course, we cannot guarantee that the Portfolio willachieve its objective.

October 23, 2019

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 income with the potential for limited capitalappreciation.

Principal Investment Strategy. The Portfolioseeks to achieve its objective by investing in a portfolioconsisting of common stocks of companies ("CoveringSecurities") derived from the S&P 500 DividendAristocrats Index and U.S. Treasury Obligations(“Treasury Obligations”). Each Covering Security issubject to a contractual right, in the form of Long TermEquity AnticiPation Securities® ("LEAPS") which gives theholder of the LEAPS the right to buy the correspondingCovering Security at a predetermined price from thePortfolio on any business day prior to the expiration ofthe LEAPS. The writing (selling) of the LEAPS generatespremium income which is used to purchase TreasuryObligations. The S&P 500 Dividend Aristocrats Indexconsists of stocks of those companies contained in theS&P 500 Index that have followed a policy ofconsistently increasing dividends every year for at least25 years. Invesco Capital Markets, Inc., the Sponsor,selected the stocks for the Portfolio from among theS&P 500 Dividend Aristocrats Index component list asmost recently made available to the Sponsor prior to theInitial Date of Deposit.

The Covering Securities represented in the Portfoliowere selected by Invesco Capital Markets, Inc., theSponsor, based on a variety of factors including, but notlimited to:

• Valuation – Companies whose current valuationsappear attractive relative to long-term trends;

• Growth – Companies with a history of andprospects for above average growth of sales andearnings;

• Cash Flow Generation – Companies with ahistory of generating attractive operating and freecash flows in order to facilitate current and futuredividends;

• Balance Sheet – Companies displaying balancesheet strength evidenced by a history of

achieving strong financial results and makingdisciplined capital management decisions; and

• Returns – Companies with a history of aboveaverage returns on invested capital.

In constructing the Portfolio, the Sponsor willensure that no more than 50% of the Portfolio will beinvested in any one particular market sector, and thata minimum of 5 market sectors will be represented inthe Portfolio at the time of selection.

In writing LEAPS on the corresponding CoveringSecurities, the Portfolio is employing what is knownas a “buy-write” or “covered call” strategy. A coveredcall strategy is implemented when an investor, orinvestment, receives a premium for writing a calloption that is covered by underlying shares of stockheld by the writer of the option. The writer of theoption receives cash for selling the call, but will beobligated to sell the stock at a predetermined pricecalled the “strike price”, thus capping the priceappreciation of the stock held by the investor.Covered call strategies are usually considered neutral,offering a limited amount of downside price protectionon the stock to the extent of the premium generatedfrom writing the call option, with potential upsidelimited to the difference between a stock’s currentmarket price and the call option’s strike price.Covered call strategies should be considered forinvestors who want to receive income with limitedcapital appreciation.

Each LEAPS is issued by The Options ClearingCorporation (“OCC”) in the form of an American styleoption, which means that it will be exercisable at thestrike price on any business day prior to its expirationdate. The expiration date for each of the LEAPSincluded in the Portfolio is January 15, 2021. As of theclose of business on the business day preceding theInitial Date of Deposit, the strike price of the LEAPS inthe Portfolio is equal to approximately 120.57% of theclosing market price of the Covering Securities on theInitial Date of Deposit. Because the Covering Securitiesare subject to LEAPS, the Portfolio gives up any

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Dividend Sustainability Buy-Write Portfolio

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appreciation in price of the Covering Securities abovethe strike price. See “Covered Call Strategy” for moreinformation about how this investment strategyoperates.

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 a subsequent series of theportfolio when the current Portfolio terminates. As aresult, you may achieve more consistent overall resultsby following the strategy through reinvestment of yourproceeds over several years if subsequent series areavailable. Repeatedly rolling over an investment in aunit investment trust may differ from long-terminvestments in other investment products whenconsidering the sales charges, fees, expenses and taxconsequences attributable to a Unitholder. For moreinformation 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.

• An issuer may be unwilling or unable todeclare dividends in the future, or mayreduce the level of dividends declared.This may result in a reduction in the value ofyour Units.

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

• The portion of the Portfolio composed ofcommon stocks does not replicate all ofthe components of the S&P 500 DividendAristocrats Index or its componentweightings and the stocks in the Portfoliowill not change if the index components,or their weightings within the index,change. The performance of the Portfolio’sstocks will not correspond with the S&P 500Dividend Aristocrats Index. The stock portion ofthe Portfolio is not intended to replicate theperformance of the index.

• The financial condition of an issuer mayworsen or its credit ratings may drop,resulting in a reduction in the value ofyour Units. This may occur at any point in time,including during the initial offering period.

• Writing LEAPS reduces the value of yourUnits. As the value of the LEAPS increases, ithas a negative impact on the value of your Units.The value of a LEAPS does not increase ordecrease at the same rate as the underlyingCovering Security.

• The Portfolio has limited potential forcapital appreciation. As the writer of LEAPS,the Portfolio forgoes the opportunity to profit fromincreases in the market value of the CoveringSecurities above the sum of the premium and thestrike price of the corresponding LEAPS, butretains the risk of loss should the price of theCovering Securities decline.

• The LEAPS may be exercised on anybusiness day prior to their expiration. Thismay result in the Covering Securities being soldto the option holders of the LEAPS prior to thetermination of the Portfolio which could triggeradverse tax consequences.

• The Portfolio invests in Treasury Obligations.Treasury Obligations are direct obligations of theUnited States which are backed by the full faith

and credit of the United States. This guaranteedoes not apply to the market value of theTreasury Obligations or Units of thePortfolio.

• The Portfolio is concentrated in securitiesissued by companies in the consumerstaples sector. Negative developments in thissector will affect the value of your investmentmore than would be the case in a more diversifiedinvestment.

• The value of the Treasury Obligations willgenerally fall if interest rates, in general,rise. In a low interest rate environment risksassociated with rising rates are heightened. Noone can predict whether interest rates will rise orfall in the future.

• We do not actively manage the Portfolio.Except in limited circumstances, the Portfoliowill hold, and may continue to buy, shares ofthe same Covering Securities and TreasuryObligations even if their market value declinesand will generally hold, and continue to write,the same call options (LEAPS), even if themarket value of the Covering Securit iesincreases.

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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 1.350 13.50Creation and development fee 0.500 5.000 ______ ______Maximum sales charge 1.850% $ 18.50 ______ ______ ______ ______

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

Estimated Organization Costs 0.667% $6.500 ______ ______ ______ ______

Estimated Annual Expenses Trustee’s fee and operating expenses 0.353% $3.436Supervisory, bookkeeping

and administrative fees 0.056 0.550 ______ ______

Total 0.409% $3.986* ______ ______ ______ ______

Example

This example helps you compare the cost of the Portfolio withother unit trusts and mutual funds. In the example we assume that theexpenses do not change and that the Portfolio’s annual return is 5%.Your actual returns and expenses will vary. Based on these assumptions,you would pay the following expenses for every $10,000 you invest inthe Portfolio:

1 year $ 290 15 months (life of Portfolio) 300

* 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 1.85% of the Public Offering Priceper Unit. There is no initial sales charge at a Public Offering Price of$10 or less. If the Public Offering Price exceeds $10 per Unit, theinitial sales charge is the difference between the total sales charge(maximum of 1.85% of the Public Offering Price) and the sum of theremaining deferred sales charge and the creation and developmentfee. The deferred sales charge is fixed at $0.135 per Unit andaccrues daily from February 10, 2020 through July 9, 2020. YourPortfolio pays a proportionate amount of this charge on the 10th dayof each month beginning in the accrual period until paid in full. Thecombination of the initial and deferred sales charges comprises the“transactional sales charge”. The creation and development fee isfixed at $0.05 per Unit and is paid at the earlier of the end of theinitial offering period (anticipated to be three months) or six monthsfollowing the Initial Date of Deposit. For more detail, see “PublicOffering Price -- General.”

Essential Information

Unit Price at Initial Date of Deposit $10.0000Unit Redemption Price at Initial

Date of Deposit1 $9.750Initial Date of Deposit October 23, 2019Mandatory Termination Date January 21, 2021Historical 12 Months Distributions2 $0.20949 per UnitEstimated Initial Distribution2 $0.05 per UnitRecord Dates 10th day of each February, May, August and November, commencing February 10, 2020

Distribution Dates 25th day of each February, May, August and November, commencing February 25, 2020CUSIP Numbers Cash – 46144K824 Fee Based Cash – 46144K832

1 After the first settlement date (October 25, 2019) you will pay accruedinterest from this date to your settlement date less incomedistributions.

2 As of close of business day prior to Initial Date of Deposit. The actualdistributions you receive will vary from this per Unit 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--Historical and Estimated Distributions.”

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Dividend Sustainability Buy-Write Portfolio 2019-4

Portfolio______________________________________________________________________________________________________________ Percentage Cost ofNumber Market Value of Aggregate Securities toof Shares Name of Issuer (1) per Share (2) Offering Price Portfolio (2) ___________ ___________________________________________ _____________ ______________ _____________ COMMON STOCKS - 99.89% Communication Services - 3.74% 500 AT&T, Inc. $ 38.17 3.74% $ 19,085 Consumer Discretionary - 16.42% 200 Lowe's Companies, Inc. 112.47 4.41 22,494 100 McDonald's Corporation 199.27 3.91 19,927 200 Target Corporation 113.19 4.44 22,638 200 V.F. Corporation 93.16 3.65 18,632 Consumer Staples - 26.11% 400 Coca-Cola Company 53.85 4.23 21,540 200 Kimberly-Clark Corporation 129.38 5.08 25,876 100 PepsiCo, Inc. 136.66 2.68 13,666 200 Procter & Gamble Company 122.18 4.79 24,436 300 Sysco Corporation 79.00 4.65 23,700 200 Walmart, Inc. 119.58 4.69 23,916 Energy - 8.69% 200 Chevron Corporation 117.80 4.62 23,560 300 Exxon Mobil Corporation 69.09 4.07 20,727 Financials - 4.11% 400 Aflac, Inc. 52.42 4.11 20,968 Health Care - 12.33% 200 Abbott Laboratories 80.54 3.16 16,108 200 Johnson & Johnson 129.20 5.07 25,840 + 200 Medtronic plc 104.49 4.10 20,898 Industrials - 16.69% 100 3M Company 167.54 3.29 16,754 300 Emerson Electric Company 70.23 4.13 21,069 100 General Dynamics Corporation 179.88 3.53 17,988 100 Stanley Black & Decker, Inc. 151.36 2.97 15,136 100 United Technologies Corporation 141.41 2.77 14,141 Information Technology - 3.13% 100 Automatic Data Processing, Inc. 159.49 3.13 15,949 Materials - 8.67% + 100 Linde plc 191.47 3.76 19,147 200 PPG Industries, Inc. 125.27 4.91 25,054 _____________ ____________ Total Common Stocks 99.89% $ 509,249 _____________ ____________

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Dividend Sustainability Buy-Write Portfolio 2019-4

Portfolio (continued)______________________________________________________________________________________________________________ Percentage Cost ofPrincipal Name of Issuer, Title, Interest Rate and of Aggregate Securities toAmount Maturity Date of Treasury Obligations (1) Offering Price Portfolio (2) ___________ ___________________________________________ ______________ _____________ TREASURY OBLIGATIONS - 2.56% $ 3,000 U.S. Treasury Notes, 2.000%, Due 01/31/2020 0.59% $ 3,002 3,000 U.S. Treasury Notes, 2.375%, Due 04/30/2020 0.59 3,011 4,000 U.S. Treasury Notes, 2.625%, Due 07/31/2020 0.79 4,030 3,000 U.S. Treasury Notes, 1.375%, Due 10/31/2020 0.59 2,992 _____________ ____________ Total Treasury Obligations 2.56% $ $13,035 _____________ ____________

Fair Percentage Fair Call Option Number of Value per of Aggregate Value toDescription of Call Options (1)(4) Strike Price (4) Contracts (4) Contract (2) Offering Price Portfolio (2)_________________________________ _______________ _____________ ____________ ______________ _____________

Long Term Equity AnticiPation Securities® (“LEAPS”) - (2.45)%AT&T, Inc. $ 45.00 5 $ 0.90 (0.09)% $ (450)Lowe's Companies, Inc. 135.00 2 4.80 (0.19) (960)McDonald's Corporation 250.00 1 1.42 (0.03) (142)Target Corporation 135.00 2 5.75 (0.22) (1,150)V.F. Corporation 110.00 2 4.10 (0.16) (820)Coca-Cola Company 65.00 4 0.50 (0.04) (200)Kimberly-Clark Corporation 165.00 2 1.55 (0.06) (310)PepsiCo, Inc. 165.00 1 1.52 (0.03) (152)Procter & Gamble Company 145.00 2 2.35 (0.09) (470)Sysco Corporation 95.00 3 1.50 (0.09) (450)Walmart, Inc. 145.00 2 2.28 (0.09) (456)Chevron Corporation 140.00 2 2.44 (0.10) (488)Exxon Mobil Corporation 82.50 3 1.06 (0.06) (318)Aflac, Inc. 62.50 4 1.08 (0.08) (432)Abbott Laboratories 100.00 2 1.76 (0.07) (352)Johnson & Johnson 155.00 2 1.97 (0.08) (394)Medtronic plc 130.00 2 1.46 (0.06) (292)3M Company 200.00 1 5.20 (0.10) (520)Emerson Electric Company 82.50 3 2.20 (0.13) (660)General Dynamics Corporation 210.00 1 6.60 (0.13) (660)Stanley Black & Decker, Inc. 180.00 1 8.60 (0.17) (860)United Technologies Corporation 165.00 1 5.45 (0.11) (545)

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Dividend Sustainability Buy-Write Portfolio 2019-4

Portfolio (continued)______________________________________________________________________________________________________________ Fair Percentage Fair Call Option Number of Value per of Aggregate Value toDescription of Call Options (1)(4) Strike Price (4) Contracts (4) Contract (2) Offering Price Portfolio (2)_________________________________ _______________ _____________ ____________ ______________ _____________

LEAPS (continued)Automatic Data Processing, Inc. $ 195.00 1 $ 3.70 (0.07)% $ (370)Linde plc 240.00 1 3.40 (0.07) (340)PPG Industries, Inc. 150.00 2 3.40 (0.13) (680) ____________ _____________Total LEAPS (2.45)% $ (12,471) ____________ _____________

TOTAL 100.00% $ $509,813 ____________ _____________ ____________ _____________

See “Notes to Portfolio”.

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Notes to Portfolio

(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 22, 2019 andhave settlement dates ranging from October 23, 2019 through October 24, 2019.

(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. The value of U.S. Treasury obligations isbased on the current offering side evaluation as of the close of the New York Stock Exchange on the business day beforethe Initial Date of Deposit. The value of LEAPS is based on the most recent closing sale price (or current ask price if thereis no closing sale price) as of the close of the New York Stock Exchange on the business day before the Initial Date ofDeposit. The aggregate offering or ask price is greater than the aggregate bid price of securities, which is the basis onwhich redemption prices will be determined for purposes of redemption of units after the initial offering period.

In accordance with FASB Accounting Standards Codification (“ASC”), ASC 820, Fair Value Measurements andDisclosures, the Portfolio utilizes various methods to measure the fair value of its investments. ASC establishes both aframework for measuring fair value as well as a hierarchy that prioritizes inputs to valuation methods. The various inputsthat may be used to determine the value of the Portfolio’s investments are summarized in the three levels presentedbelow. The inputs or methodologies used for valuing securities are not necessarily an indication of the risk associatedwith investing in those securities.

Level 1 -- Quoted prices (unadjusted) for identical assets or liabilities in active markets that the trust has the ability toaccess as of the measurement date.

Level 2 -- Prices determined using other significant observable inputs. Observable inputs are inputs that othermarket participants would use in pricing a security, which may include quoted prices for similar securities, interest rates,prepayment speeds and credit risk.

Level 3 -- Prices determined using significant unobservable inputs. In certain situations where quoted prices orobservable inputs are unavailable, unobservable inputs may be used. Unobservable inputs reflect the Portfolio’s ownassumptions about the factors market participants would use in pricing an investment, and would be based on the bestinformation available.

The following table summarizes the Portfolio’s investments as of the close of the New York Stock Exchange on thebusiness day before the Initial Date of Deposit based on the inputs used to value them:

Level 1 Level 2 Level 3

Common Stocks $ 509,249 $ – $ – Treasury Obligations $ – $ 13,035 $ – LEAPS $ – $ (12,471) $ –

Total $ 509,249 $ 564 $ –

The net cost of the investments to the Sponsor for the Portfolio is $509,213 and the Sponsor’s profit or (loss) is $600.

“+” indicates that the security was issued by a foreign company.

(3) A Treasury Obligation marked with this note was issued at an original issue discount.

(4) The LEAPS can be exercised on any business day prior to their expiration on January 15, 2021. Each contract entitlesthe holder thereof to purchase 100 shares of the Covering Security at the strike price indicated in the column entitled“Call Option Strike Price”.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Sponsor and Unitholders of Invesco Unit Trusts, Series 2007:

Opinion on the Financial Statements

We have audited the accompanying statement of condition (including the related portfolio schedule) ofDividend Sustainability Buy-Write Portfolio 2019-4 (included in Invesco Unit Trusts, Series 2007 (the “Trust”)) asof October 23, 2019, and the related notes (collectively referred to as the “financial statements”). In ouropinion, the financial statements present fairly, in all material respects, the financial position of the Trust as ofOctober 23, 2019, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of Invesco Capital Markets, Inc., the Sponsor. Ourresponsibility is to express an opinion on the Trust’s financial statements based on our audit. We are a publicaccounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”)and are required to be independent with respect to the Trust in accordance with the U.S. federal securitieslaws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require thatwe plan and perform the audit to obtain reasonable assurance about whether the financial statements arefree of material misstatement, whether due to error or fraud. The Trust is not required to have, nor were weengaged to perform, an audit of its internal control over financial reporting. As part of our audit we arerequired to obtain an understanding of internal control over financial reporting but not for the purpose ofexpressing an opinion on the effectiveness of the Trust’s internal control over financial reporting. Accordingly,we express no such opinion.

Our audit included performing procedures to assess the risks of material misstatement of the financialstatements, whether due to error or fraud, and performing procedures that respond to those risks. Suchprocedures included examining, on a test basis, evidence regarding the amounts and disclosures in thefinancial statements. Our audit also included evaluating the accounting principles used and significantestimates made by the Sponsor, as well as evaluating the overall presentation of the financial statements. Ourprocedures included confirmation of cash or an irrevocable letter of credit deposited for the purchase ofsecurities as shown in the statement of condition as of October 23, 2019 by correspondence with The Bankof New York Mellon, Trustee. We believe that our audit provides a reasonable basis for our opinion.

/s/ GRANT THORNTON LLP

We have served as the auditor of one or more of the unit investment trusts, sponsored by Invesco CapitalMarkets, Inc. and its predecessors, since 1976.

New York, New YorkOctober 23, 2019

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STATEMENT OF CONDITIONAs of October 23, 2019

INVESTMENT IN SECURITIESContracts to acquire Securities (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 522,284 Accrued interest to the first settlement date (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 ___________ Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 522,378 ___________ ___________

LIABILITIES AND INTEREST OF UNITHOLDERSLiabilities-- Fair value of Long Term Equity AnticiPation Securities® (“LEAPS”) (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 12,471 Accrued interest payable to Sponsor (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Organization costs (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,314 Deferred sales charge liability (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,883 Creation and development fee liability (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,549 ___________ Total Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25,311 ___________Interest of Unitholders-- Cost to investors (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509,813 Less: deferred sales charge, creation and development fee and organization costs (3)(5)(6)(7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12,746 ___________ Net interest to Unitholders (1)(2)(6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 497,067 ___________ Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 522,378 ___________ ___________Units outstanding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50,982 ___________ ___________Net asset value per Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 9.750 ___________ ___________

(1) The value of the Securities is determined by the Trustee on the bases set forth under “Public Offering--Unit Price”. The contracts to acquireSecurities are collateralized by cash or an irrevocable letter of credit which has been deposited with the Trustee. The liability for the LEAPS isbased upon their aggregate underlying value.

(2) The Trustee will advance the amount of net interest accrued to the first settlement date to the Portfolio for distribution to the Sponsor as theUnitholder of record as of such date.

(3) A portion of the Public Offering Price represents an amount sufficient to pay for all or a portion of the costs incurred in establishing thePortfolio. 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 initialoffering period (approximately three months) or six months following the Initial Date of Deposit to an account maintained by the Trustee fromwhich the organization expense obligation of the investors will be satisfied. To the extent that actual organization costs of the Portfolio aregreater than the estimated amount, only the estimated organization costs added to the Public Offering Price will be reimbursed to the Sponsorand deducted from the assets of the Portfolio.

(4) Represents the amount of mandatory distributions from the Portfolio on the bases set forth under “Public Offering”.(5) The creation and development fee is payable by the 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.(6) The aggregate public offering price and the aggregate sales charge are computed on the bases set forth under “Public Offering”.(7) Assumes the maximum sales charge.

A-1

THE PORTFOLIO

The Portfolio was created under the laws of the Stateof New York pursuant to a Trust Indenture and TrustAgreement (the “Trust Agreement”), dated the date ofthis prospectus (the “Initial Date of Deposit”), amongInvesco Capital Markets, Inc., as Sponsor, InvescoInvestment Advisers LLC, as Supervisor, and The Bankof New York Mellon, as Trustee.

The Portfolio offers investors the opportunity topurchase Units representing proportionate interests in aportfol io of securit ies. The Portfol io may be anappropriate medium for investors who desire toparticipate in a portfolio of securities with greaterdiversification than they might be able to acquireindividually.

On the Initial Date of Deposit, the Sponsor depositeddelivery statements relating to contracts for theacquisition of the Securities and cash or an irrevocableletter of credit in the amount required for theseacquisitions with the Trustee. In exchange for thesecontracts the Trustee del ivered to the Sponsordocumentation evidencing the ownership of Units of thePortfolio. Unless otherwise terminated as provided inthe Trust Agreement, the Portfolio will terminate on theMandatory Termination Date and any remainingSecurities will be liquidated or distributed by the Trusteewithin a reasonable time. As used in this prospectus theterm “Securities” means the securities (includingcontracts to acquire these securities) listed in the“Portfolio” and any additional securities deposited intothe Portfolio.

Additional Units of the Portfolio may be issued at anytime by deposit ing in the Portfol io ( i ) addit ionalSecurities, (ii) contracts to acquire Securities togetherwith cash or irrevocable letters of credit or (iii) cash (or aletter of credit or the equivalent) with instructions toacquire additional Securities. As additional Units areissued by the Portfolio, the aggregate value of theSecurities will be increased and the fractional undividedinterest represented by each Unit may be decreased.The Sponsor may continue to make additional depositsinto the Portfolio following the Initial Date of Depositprovided that the additional deposits will be in amounts

which will maintain, as nearly as practicable, the samepercentage relationship among the number of shares,call option contracts, or principal amount of eachSecurity in the Portfolio that existed immediately prior tothe subsequent deposit. Accordingly, if the entirety of thePortfolio’s holdings with respect to a particular CoveringSecurity is called from the Portfolio pursuant to itscorresponding LEAPS during the initial offering period, allsubsequent additional deposits will neither include suchCovering Security nor its corresponding LEAPS.However, if only a portion of the Portfolio’s holdings withrespect to a particular Covering Security is called fromthe Portfolio pursuant to its corresponding LEAPS duringthe initial offering period, each subsequent deposit willinvest in the lower relative proportion based upon theremaining amount of such Covering Security and itscorresponding LEAPS. Investors may experience adilution of their investments and a reduction in theiranticipated income because of fluctuations in the pricesof the Securities between the time of the deposit and theacquisition of the Securities and because the Portfoliowill pay the associated brokerage or acquisition fees. Inaddition, during the initial offering of Units it may not bepossible to buy a particular Security due to regulatory ortrading restrictions, or corporate actions. While suchlimitations are in effect, additional Units would becreated by purchasing each of the Securities in yourPortfolio that are not subject to those limitations. Due topurchase requirements in executing a covered calloption strategy and market value fluctuations, thePortfolio may not be able to invest in each Security onany subsequent date of deposit in the same proportionas existed on the Initial Date of Deposit or immediatelyprior to the subsequent deposit of Securities. This couldincrease the potential for dilution of investments andvariances in anticipated income. Purchases and sales ofSecurities by your Portfolio may impact the value of theSecurities, particularly those of LEAPS. This mayespecially be the case during the initial offering of Units,upon Portfolio termination and in the course of satisfyinglarge 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 Init ial Date of

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Deposit, the number of Units may be adjusted so thatthe Public Offering Price per Unit equals $10. Thenumber of Units, fractional interest of each Unit in yourPortfolio and any historical or estimated per Unitdistribution amount will increase or decrease to theextent of any adjustment. To the extent that any Unitsare redeemed to the Trustee or additional Units areissued as a result of additional Securit ies beingdeposited by the Sponsor, the fractional undividedinterest in your Portfol io represented by eachunredeemed Unit will increase or decrease accordingly,although the actual interest in your Portfolio will remainunchanged. Units wi l l remain outstanding unti lredeemed upon tender to the Trustee by Unitholders,which may include the Sponsor, or until the terminationof the Trust Agreement.

In order to acquire certain securities, it may benecessary for the Sponsor or Trustee to pay amountscovering accrued interest on the Treasury Obligationswhich exceed the amounts which wi l l be madeavailable through cash furnished by the Sponsor on theDate of Deposit. This cash may exceed the interestwhich would accrue to the first settlement date. TheTrustee has agreed to pay for any amounts necessaryto cover any excess and will be reimbursed whenfunds become available from interest payments on theTreasury Obligations.

The Portfolio consists of (a) the Securities (includingcontracts for the acquisition thereof) listed under“Portfolio” as may continue to be held from time to timein the Portfolio, (b) any additional Securities acquiredand held by the Portfolio pursuant to the provisions ofthe Trust Agreement and (c) any cash held in the relatedIncome and Capital Accounts. Neither the Sponsor northe Trustee shall be liable in any way for any contractfailure in any of the Securities.

OBJECTIVE AND SECURITIES SELECTION

The objective of the Portfolio is described on page 2.There is no assurance that the Portfolio will achieveits objective.

The S&P 500 Dividend Aristocrats Index (the “Index”)is a product of S&P Dow Jones Indices LLC (“S&P DJI”)

and has been licensed for use by Invesco CapitalMarkets, Inc. “Standard & Poor’s®, and “S&P” areregistered trademarks of Standard & Poor’s FinancialServices LLC (“S&P”); and these trademarks have beenlicensed for use by S&P DJI and sublicensed for certainpurposes by Invesco Capital Markets, Inc. The Portfoliois not sponsored, endorsed, sold or promoted by S&PDJI, S&P, their respective affiliates, and none of suchpart ies make any representation regarding theadvisability of investing in such product(s) nor do theyhave any l iabi l i ty for any errors, omissions, orinterruptions of the Index.

Except as described herein, the publishers of theIndex have not participated in any way in the creation ofthe Portfolio or in the selection of stocks included in thePortfolio and have not approved any information hereinrelating thereto. The publishers of the Index are notaffiliated with the Sponsor.

The Sponsor does not manage the Portfolio. Youshould note that the selection criteria were applied tothe Securities for inclusion in the Portfolio prior to theInitial Date of Deposit. After this time, the Securities mayno longer meet the selection criteria. Should a Securityno longer meet the selection criteria, we will notgenerally remove the Security from the Portfolio. Inoffering the Units to the public, neither the Sponsor norany broker-dealers are recommending any of theindividual Securities but rather the entire pool ofSecurities in the Portfolio, taken as a whole, which arerepresented by the Units.

COVERED CALL STRATEGY

The strategy followed by the Portfolio is a coveredcall option writing strategy. A writer (seller) of acovered call sells call options against a securitycurrently held by the writer. The writer of a call optionreceives a cash premium for selling the call option butis obligated to sell the security at the strike price, if theoption is exercised. The payor of the option premium,the option holder, has the right, but not the obligation,to purchase the security at the strike price on anybusiness day prior to the applicable LEAPS expirationdate. The opt ion wr i ter g ives up any capita l

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appreciation in the covered security above the strikeprice. This strategy may be appropriate for an investorwho is willing to limit the upside potential on thesecurity in return for receiving the option premium.Future series of the Portfolio may have differentmaturity lengths due to the expiration dates of theLEAPS included therein. On or before the Initial Dateof Deposit, the Sponsor entered into contracts to buythe Covering Securities. The Sponsor then wroteLEAPS on each of the Covering Securit ies andreceived an opt ion premium. Using the opt ionpremium proceeds, the Sponsor entered intocontracts to buy the Treasury Obligations. On theInitial Date of Deposit, the Sponsor deposited theCovering Securities subject to the LEAPS and theTreasury Obligations with the Trustee on behalf of thePortfolio. At such time the Sponsor also assigned theLEAPS to the Portfolio, giving the option holders ther ight to purchase Covering Securit ies from thePortfolio. Each LEAPS gives the option holder the right(but not the obligation) to purchase the CoveringSecurities from the Portfolio at the strike price on anybusiness day prior to the applicable LEAPS expiration.The strike price for a Covering Security held by thePortfolio will be adjusted downward (but not belowzero) upon certain extraordinary distributions made bythe issuers of the Covering Securities to Unitholdersbefore the LEAPS expiration triggered by certaincorporate events affecting such Covering Security.See “Risk Factors--LEAPS”. In calculating the netasset value of your Units, the price of a Unit is reducedby the value of the LEAPS.

As of the close of business on the business daypreceding the Initial Date of Deposit, the capitalappreciation on the Covering Securities held by thePortfolio is limited to a maximum of approximately20.57%, because of the obligation of the Portfolio to theoption holder with respect to each of the CoveringSecurities entitling the option holder to purchase theCovering Securities at the strike price. The LEAPS limitthe upside potential in the Covering Securities to anamount approximately equal to the strike price.However, as the option premium received in return forwriting the LEAPS was used to purchase Treasury

Obligations, you will receive interest from the TreasuryObligations during the life of the Portfolio and your prorata port ion of the principal from the TreasuryObligations after the Treasury Obligations’ maturity.

If the market price of a Covering Security held by thePortfolio is greater than its strike price, the Portfolio willnot participate in any appreciation in that CoveringSecurity above the strike price because it is expectedthat the holder of the related LEAPS will exercise its rightto purchase that Covering Security from the Portfolio atthe strike price. If the market price of a Covering Securityheld by the Portfolio is less than its strike price at theMandatory Termination Date, it is expected that theLEAPS will expire without being exercised. To the extentparticular Covering Securities held by the Portfolio declinein price or fail to appreciate to a price equal to the relatedstrike price, the Portfolio will not achieve its maximumpotential capital appreciation.

The Treasury Obligations included in the Portfolio arenon-callable debt obligations that are issued by andbacked by the full faith and credit of the U.S.Government, although Units of the Portfolio are not sobacked. Additionally, the U.S. Government assures thetimely payment of principal and interest on the underlyingTreasury Obligations in the Portfolio. Of course, thisapplies only to the payment of principal and interest onthe Treasury Obligations and not the Units themselves.

Below are sample illustrations of certain possiblefuture market conditions:

• Covering Security prices increase abovethe LEAPS strike price: The LEAPS areexercised and the underlying Covering Securityshares are sold at the str ike pr ice. Netproceeds received by the Portfolio from the saleof the Covering Security will be distributed toUnitholders and will not be reinvested by thePortfolio. Profits are limited to the premiumreceived from writing the LEAPS, dividendsreceived from the Covering Securities prior totheir sale from the Portfolio, interest receivedfrom the Treasury Obl igat ions, plus thedifference between each Covering Security'sinitial price and their strike price. Investors will

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forgo any dividends paid on the CoveringSecurities subsequent to their sale from thePortfolio. It is important to note that writingcovered calls limits the appreciation potential ofthe underlying Covering Securities. Since aLEAPS provides its holder with a right, but notan obligation, to purchase Covering Securitiesat the strike price, it may be possible that aLEAPS corresponding to a Covering Securitythat is trading above the strike price is notimmediately exercised.

• Covering Security prices remain belowthe LEAPS strike price: The LEAPS expireworthless and the Portfol io sti l l owns theCovering Security shares. Profits are limited toany capital appreciat ion on the CoveringSecurities, the premium received from writingthe LEAPS, any dividends received from theCovering Securities, as well as interest receivedfrom the Treasury Obligations.

• Covering Security prices decrease: TheLEAPS expire worthless and the Portfolio stillowns the Covering Security shares. The “break-even price” on the Covering Securit ies islowered by the premium received from writingthe LEAPS. In addition, the Portfolio will receivedividends from the Covering Securities, as wellas interest from the Treasury Obligations.

RISK FACTORS

All investments involve risk. This section describes themain risks that can impact the value of the securities inyour Portfolio. You should understand these risks beforeyou invest. If the value of the securities falls, the value ofyour Units will also fall. We cannot guarantee that yourPortfolio will achieve its objective or that your investmentreturn will be positive over any period.

Market Risk. Market risk is the risk that the value ofthe securities in your Portfolio will fluctuate. This couldcause the value of your Units to fall below your originalpurchase price. Market value fluctuates in response tovarious factors. These can include changes in interestrates, inflation, the financial condition of a security’s

issuer, perceptions of the issuer, or ratings on a securityof the issuer. Even though your Portfolio is supervised,you should remember that we do not manage yourPortfolio. Your Portfolio will not sell a security solelybecause the market value falls as is possible in amanaged fund.

Interest Rate Risk. Interest rate risk is the risk thatTreasury Obligations in the Portfolio will decline in valuebecause of a rise in interest rates. Generally, securitiesthat pay fixed rates of return will increase in value wheninterest rates decline and decrease in value wheninterest rates rise. Typically, securities that pay fixedrates of return with longer periods before maturity aremore sensitive to interest rate changes.

Dividend Payment Risk. Dividend payment risk isthe risk that an issuer of a common stock is unwillingor unable to pay div idends. Stocks representownership interests in the issuers and are notobligations of the issuers. Common stockholders havea right to receive dividends only after the company hasprovided for payment of its creditors, bondholders andpreferred stockholders. Common stocks do not assuredividend payments. Dividends are paid only whendeclared by an issuer’s board of directors and theamount of any div idend may vary over t ime. I fdividends received by the Portfolio are insufficient tocover expenses, redemptions or other Portfolio costs,it may be necessary for the Portfolio to sell Securitiesto cover such expenses, redemptions or other costs.Any such sales may result in capital gains or losses toyou. See “Taxation”.

The portion of the Portfolio of stocks from the S&P500 Dividend Aristocrats Index does not seek toreplicate all of the components of the index or itscomponent weightings, and further, the stocks in thePortfolio will not change if the index components, ortheir weight ings within the index, change. Theperformance of stocks in your Portfol io wil l notcorrespond with the index for this reason and becauseyour Portfolio incurs a sales charge and expenses.

Industry Risks. Your Portfol io may investsignificantly in certain industries. Any negative impacton the related industry will have a greater impact on the

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value of Units than on a portfolio diversified over severalindustries. You should understand the risks of theseindustries before you invest.

The relative weighting or composition of yourPortfolio may change during the life of your Portfolio.Following the Initial Date of Deposit, the Sponsorintends to issue additional Units by depositing in yourPortfolio additional securities in a manner consistentwith the provisions described in the above sectionentitled “The Portfolio”. As described in that section, itmay not be possible to retain or continue to purchaseone or more Securities in your Portfolio. In addition, dueto certain limited circumstances described under“Portfolio Administration”, the composition of theSecurities in your Portfolio may change. Accordingly,the fluctuations in the relative weighting or compositionof your Portfolio may result in concentrations (25% ormore of a Portfolio’s assets) in securities of a particulartype, industry and/or geographic region described inthis section.

Consumer Discretionary and Consumer StaplesIssuers. Your Portfolio invests significantly in companiesthat manufacture or sell various consumer products.General risks of these companies include the overallstate of the economy, intense competit ion andconsumer spending trends. A decline in the economywhich results in a reduction of consumers’ disposableincome can negatively impact spending habits. Globalfactors including political developments, imposition ofimport controls, fluctuations in oil prices, and changesin exchange rates may adversely affect issuers ofconsumer products and services.

Competitiveness in the retail industry may requirelarge capital outlays for the installation of automatedcheckout equipment to control inventory, track the saleof items and gauge the success of sales campaigns.Retailers who sell their products over the Internet havethe potential to access more consumers, but mayrequire sophisticated technology to remain competitive.Changes in demographics and consumer tastes canalso affect the demand for, and the success of,consumer products and services in the marketplace.Consumer products and services companies may besubject to government regulation affecting their

products and operations which may negatively impactperformance. Tobacco companies may be adverselyaffected by new laws, regulations and litigation.

Industrials Issuers. Your Portfolio invests significantlyin industrials companies. General risks of industrialscompanies include the general state of the economy,intense competition, imposition of import controls,volatility in commodity prices, currency exchange ratefluctuation, consolidation, labor relations, domestic andinternational politics, excess capacity and consumerspending trends. Companies in the industrials sectormay be adversely affected by liability for environmentaldamage and product liability claims. Capital goodscompanies may also be significantly affected by overallcapital spending and leverage levels, economic cycles,technical obsolescence, delays in modernization,limitations on supply of key materials, depletion ofresources, government regulations, governmentcontracts and e-commerce initiatives.

Industrials companies may also be affected by factorsmore specific to their individual industries. Industrialmachinery manufacturers may be subject to declines incommercial and consumer demand and the need formodernization. Aerospace and defense companies maybe influenced by decreased demand for new equipment,aircraft order cancellations, disputes over or ability toobtain or retain government contracts, changes ingovernment budget priorities, changes in aircraft-leasingcontracts and cutbacks in profitable business travel. Thenumber of housing starts, levels of public and non-residential construction including weakening demand fornew office and retail space, and overall constructionspending may adversely affect construction materialsand equipment manufacturers. Stocks of transportationcompanies are cyclical and can be significantly affectedby economic changes, fuel prices and insurance costs.Transportation companies in certain countries may alsobe subject to significant government regulation andoversight, which may negatively impact their businesses.

LEAPS. The common stocks held by your Portfolioare subject to LEAPS. Although you may redeem yourUnits at any time, if you redeem before the LEAPS areexercised or expire, the value of your Units may beadversely affected by the value of the LEAPS. However,

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if LEAPS are not exercised and you hold your Units untilthe Mandatory Termination Date, the LEAPS will expireand the Portfolio will consist of only cash or securities ora combination of each.

If you sell or redeem your Units before the LEAPS areexercised, or if the Portfolio terminates prior to theMandatory Termination Date and the LEAPS have notbeen exercised, you may not realize any appreciation inthe value of the Covering Securities because even if theCovering Securities appreciate in value, that appreciationmay (a) be more than fully, (b) fully or (c) partly offset byan increase in value in the LEAPS. The value of theLEAPS is deducted from the value of the Portfolio’sassets when determining the value of a Unit. If theCovering Securities decline in price, your loss may begreater than it would be if there were no LEAPS becausethe value of the LEAPS is a reduction to the value of theCovering Securities when calculating the value of a Unit.An increase in value of the LEAPS, an obligation of thePortfolio to sell or deliver the Covering Securities at thestrike price if the LEAPS are exercised by the optionholder, will reduce the value of the Covering Securities inthe Portfolio below the value of the Covering Securitiesthat would otherwise be realizable if the CoveringSecurities were not subject to the LEAPS. You shouldnote that even if the price of a Covering Security doesnot change, if the value of a LEAPS increases (forexample, based on increased volatility of a CoveringSecurity) your Units will lose value.

The value of the LEAPS reduces the value of yourUnits. As the value of the LEAPS increases, it has amore negative impact on the value of your Units. Thevalue of the LEAPS will also be affected by changes inthe value and dividend rates of the Covering Securities,an increase in interest rates, a change in the actual andperceived volatility of the stock market and the CoveringSecurit ies and the remaining time to expiration.Additionally, the value of a LEAPS does not increase ordecrease at the same rate as the underlying CoveringSecurities (although they generally move in the samedirection). However, as a LEAPS approaches itsexpiration date, its value increasingly moves with theprice of the corresponding Covering Security. The strikeprice for each LEAPS held by the Portfolio may be

adjusted downward before the LEAPS expirationtriggered by certain corporate events affecting thatCovering Security. The OCC generally does not adjustoption strike prices to reflect ordinary dividends paid onthe related stock but may adjust option strike prices toreflect certain corporate events affecting the relatedstock such as extraordinary dividends, stock splits,merger or other extraordinary distributions or events. Areduction in the strike price of an option could reducethe Portfolio’s capital appreciation potential on therelated Covering Security.

If the value of the underlying Covering Securitiesexceeds the strike price of the LEAPS, it is likely thatthe option holder will exercise their right to purchase thecorresponding Covering Security from the Portfolio. Asthe LEAPS may be exercised on any business day priorto their expiration, Covering Securities may be sold tothe option holders of the LEAPS prior to the terminationof the Portfolio. If this occurs, distributions from thePortfolio will be reduced by the amount of the dividendswhich would have been paid by Covering Securitiessold from the Portfolio. As discussed under “Taxation”,the sale of Covering Securities from the Portfolio willlikely result in capital gains to Unitholders, which maybe short-term depending on the holding period of theCovering Securities. In addition, the sale of CoveringSecurities may, in certain circumstances, result in theearly termination of the Portfolio.

Treasury Obligations. The Portfolio invests inTreasury Obligations. Treasury Obligations are directobligations of the United States which are backed bythe full faith and credit of the United States. TreasuryObligations are generally not affected by credit risk andhave historically involved little risk of loss of principal ifheld to maturity, but are subject to changes in marketvalue resulting from changes in interest rates. The valueof Treasury Obligations will be adversely affected bydecreases in bond prices and increases in interestrates, not only because increases in interest ratesgenerally decrease values, but also because increasedinterest rates may indicate an economic slowdown.Certain Treasury Obligations may have been purchasedat prices of less than their par value at maturity,indicating a market discount. Other Treasury Obligations

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may have been purchased at prices greater than theirpar value at maturity, indicating a market premium. Thecoupon interest rate of Treasury Obligations purchasedat a market discount was lower than current marketinterest rates of newly issued bonds of comparablerating and type and the coupon interest rate of TreasuryObligations purchased at a market premium was higherthan current market interest rates of newly issuedbonds of comparable rating and type. Generally, thevalue of bonds purchased at a market discount willincrease in value faster than bonds purchased at amarket premium if interest rates decrease. Conversely, ifinterest rates increase, the value of bonds purchased ata market discount will decrease faster than bondspurchased at a market premium.

In times of market turbulence, investors may turn tothe relative safety of securities issued or guaranteed bythe U.S. Treasury, causing the prices of these securitiesto rise and their yields to decline.

Additional Units. The Sponsor may createadditional Units of the Portfolio by depositing into thePortfolio additional securities or cash with instructionsto acquire additional securities. Some of the securitiesheld by your Portfolio may have limited trading volume.The Trustee, with directions from the Sponsor, willendeavor to acquire securities with deposited cash assoon as practicable, reserving the right to acquire thosesecurities over several business days following eachdeposit in an effort to reduce the effect of theseacquisitions on the market price for those securities. Tothe extent the price of a security increases or decreasesbetween the time cash is deposited with instructions toacquire the security and the time cash is used toacquire the security, Units may represent less or moreof that security and more or less of the other securitiesin the Portfolio. This could result in the Portfolio’s failureto participate in any appreciation of certain securitiesbefore the cash is fully invested.

Reduced Diversification. The Portfolio involvesthe risk that the Portfolio will become smaller and lessdiversified as securities are sold or LEAPS are exercisedprior to their expiration. This could increase your risk ofloss and increase your share of Portfolio expenses.

Tax and Legislation Risk. Tax legis lat ionproposed by the President or Congress, tax regulationsproposed by the U.S. Treasury or positions taken bythe Internal Revenue Service could affect the value ofyour Portfol io by changing the taxat ion or taxcharacterizations of its portfolio securities, or otherincome paid by or related to such securities. Congresshas considered such proposals in the past and may doso in the future. No one can predict whether anylegislation will be proposed, adopted or amended byCongress and no one can predict the impact that anyother legislation might have on your Portfolio or itsportfolio securities, or on the tax treatment of yourPortfolio or of your investment in your Portfolio.

Liquidity Risk. Liquidity risk is the risk that thevalue of a security will fall if trading in the security islimited or absent. No one can guarantee that a liquidtrading market will exist for any security.

No FDIC Guarantee. An investment in yourPortfolio is not a deposit of any bank and is not insuredor guaranteed 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 Unit plusorganization costs plus the sales charge. The net assetvalue per Unit is the value of the securities, cash, anyaccrued interest, and other assets in your Portfolioreduced by the liabilities of the Portfolio divided by thetotal Units outstanding. In calculating the net assetvalue per Unit, the value of the Covering Securities arenetted against the value of the LEAPS. The maximumsales charge equals 1.85% of the Public Offering Priceper Unit (1.885% of the aggregate offering price of theSecurities) at the time of purchase.

The initial sales charge is the difference between thetotal sales charge amount (maximum of 1.85% of thePublic Offering Price per Unit) and the sum of theremaining fixed dollar deferred sales charge and thefixed dollar creation and development fee (initially$0.185 per Unit). Depending on the Public OfferingPrice per Unit, you pay the initial sales charge at the

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time you buy Units. The deferred sales charge is fixedat $0.135 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 1.85% ofthe Public Offering Price per Unit.

The “Fee Table” shows the sales charge calculationat a $10 Public Offering Price per Unit. At a $10 PublicOffering Price, there is no initial sales charge during theinitial offering period. If the Public Offering Priceexceeds $10 per Unit, you will pay an initial salescharge equal to the difference between the total salescharge and the sum of the remaining deferred salescharge and the creation and development fee. Forexample, if the Public Offering Price per Unit rose to

$14, the maximum sales charge would be $0.259(1.85% of the Public Offering Price per Unit), consistingof an initial sales charge of $0.074, a deferred salescharge of $0.135 and the creation and development feeof $0.050. Since the deferred sales charge and creationand development fee are fixed dollar amounts per Unit,your Portfolio must charge these amounts per Unitregardless of any decrease in net asset value. However,if the Public Offering Price per Unit falls to the extentthat the maximum sales charge percentage results in adollar amount that is less than the combined fixed dollaramounts of the deferred sales charge and creation anddevelopment fee, your initial sales charge will be a creditequal to the amount by which these fixed dollar chargesexceed your sales charge at the time you buy Units. Insuch a situation, the value of securities per Unit wouldexceed the Public Offering Price per Unit by the amountof the initial sales charge credit and the value of thosesecurities will fluctuate, which could result in a benefit ordetriment to Unitholders that purchase Units at thatprice. The initial sales charge credit is paid by theSponsor and is not paid by the Portfolio. If the PublicOffering Price per Unit fell to $6, the maximum salescharge would be $0.111 (1.85% of the Public OfferingPrice per Unit), which consists of an initial sales charge(credit) of -$0.074, a deferred sales charge of $0.135and a creation and development 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 that youpay. It is your financial professional’s responsibility toalert the Sponsor of any discount when you purchaseUnits. Before you purchase Units you must also informyour financial professional of your qualification for anydiscount to be eligible for a reduced sales charge. Sincethe deferred sales charges and creation and

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development fee are fixed dollar amounts per Unit, yourPortfol io must charge these amounts per Unitregardless of any discounts. However, if you are eligibleto receive a discount such that your total sales chargeis less than the fixed dollar amounts of the deferredsales charges and creation and development fee, youwill receive a credit equal to the difference between yourtotal sales charge and these fixed dollar charges at thetime you buy 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 “fee based” charge(“Fee Based”) is imposed (“Fee Accounts”). If Units ofthe Portfolio are purchased for a Fee Account and thePortfolio is subject to a Fee Based charge (i.e., thePortfolio is “Fee Based Eligible”), then the purchase willnot be subject to the transactional sales charge but willbe subject to the creation and development fee of$0.05 per Unit that is retained by the Sponsor. Pleaserefer to the 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 the Portfolio. Fee Based Eligible Units are not eligiblefor any sales charge discounts in addition to that whichis described in this paragraph and under the “FeeAccounts” section found below.

Employees. Employees, officers and directors(including their spouses (or the equivalent if recognizedunder local law) and children or step-children under 21living in the same household, parents or step-parentsand trustees, custodians or fiduciaries for the benefit ofsuch persons) of Invesco Capital Markets, Inc. and itsaffiliates, and dealers and their affiliates may purchaseUnits at the Public Offering Price less the applicabledealer concession. All employee discounts are subjectto the pol icies of the related sel l ing f irm. Onlyemployees, officers and directors of companies that

allow their employees to participate in this employeediscount program are eligible for the discounts.

Unit Price. The Public Offering Price of Units willvary from the amounts stated under “EssentialInformation” in accordance with fluctuations in the pricesof the underlying Securities in the Portfolio. The initialprice of the 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 Timeis the 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 receivedby the 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 theEvaluation Time or orders received by such persons thatare not transmitted to the Sponsor until after the timedesignated by the Sponsor, are priced based on thedate of the next determined Public Offering Price perUnit provided they are received timely by the Sponsor onsuch date. 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 the Covering Securities and LEAPS isgenerally determined using the last sale price forsecurities traded on a national securities exchange or aU.S. options exchange. In some cases, the CoveringSecurities and LEAPS may be priced based on the lastasked or bid price in the over-the counter market or byusing other recognized pricing methods. This will bedone if a security is not principally traded on a nationalsecurities exchange or a U.S. options exchange or if themarket quotes are unavailable or inappropriate.

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With respect to the Treasury Obligations, theaggregate price of such securities is determined on thebasis of bid prices or offering prices, as is appropriate,(a) on the basis of current market prices obtained fromdealers or brokers who customarily deal in TreasuryObligations; (b) if these prices are not available, on thebasis of current market prices for comparablesecurities; (c) by causing the value of the securities tobe determined by others engaged in the practice ofevaluation, quoting or appraising comparable securities;or (d) by any combination of the above. Market prices ofthe Treasury Obligations will generally fluctuate withchanges in market interest rates.

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 isvalued at its fair value, as determined under proceduresestablished by the Trustee or an independent pricingservice used by the Trustee. In these cases, thePortfolio’s net asset value will reflect certain portfoliosecurities’ fair value rather than their market price. Withrespect to securities that are primarily listed on foreignexchanges, the value of the portfolio securities maychange on days when you will not be able to purchaseor sell Units. The value of any foreign securities is basedon the applicable currency exchange rate as of theEvaluation Time. The Sponsor wil l provide pricedissemination and oversight services to the Portfolio.

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 the 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 the Portfolio pays these costs.

Accrued Interest. Accrued interest is anaccumulation of unpaid interest on the Portfolio's

Treasury Obligations, which generally is paid semi-annually, although your Portfolio accrues interest daily.Because of this, your Portfolio always has an amountof interest earned but not yet collected by the Trustee.For this reason, with respect to sales settling after thefirst settlement date, the proportionate share ofaccrued interest to the settlement date is added to thePublic Offering Price of Units. You will receive theamount of accrued interest paid on your Units on thenext distribution date. In an effort to reduce theaccrued interest which would have to be paid byUnitholders, the Trustee will advance the amount ofaccrued interest to the Sponsor as the Unitholder ofrecord as of the first settlement date. Consequently,the accrued interest added to the Public Offering Priceof Units will include only accrued interest from the firstsettlement date to the date of settlement, less anydistributions from the Income Account after the firstsettlement date. Because of the varying interestpayment dates of the Treasury Obligations in thePortfolio, accrued interest at any point in time will begreater than the amount of interest actually received byyour Portfolio and distributed to Unitholders. If you sellor redeem all or a portion of your Units, you will beentitled to receive your proportionate share of theaccrued interest from the purchaser of your Units.

Unit Distribution. Units will be distributed to thepublic by the Sponsor, broker-dealers and others at thePublic Offer ing 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 and otherswil l be al lowed a regular concession or agencycommission in connection with the distribution of Unitsduring the initial offering period of 1.25% of the PublicOffering Price per Unit.

Volume Concession Based Upon Annual Sales. Asdescribed below, broker-dealers and other sellingagents may in certain cases be eligible for an additionalconcession based upon their annual eligible sales of allInvesco fixed income and equity unit investment trusts.Eligible sales include all units of any Invesco unitinvestment trust underwritten or purchased directly from

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Invesco during a trust’s initial offering period. Forpurposes of this concession, trusts designated as either“Invesco Unit Trusts, Taxable Income Series” or“Invesco Unit Trusts, Municipal Series” are fixed incometrusts, and trusts designated as “Invesco Unit TrustsSeries” are equity trusts. In addition to the regularconcessions or agency commissions described abovein “Unit Sales Concessions” all broker-dealers and othersell ing firms wil l be eligible to receive additionalcompensation based on total initial offering period salesof all eligible Invesco unit investment trusts during theprevious consecutive 12-month period through the endof the most recent month. The Volume Concession, asapplicable to equity and fixed income trust units, is setforth 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 sell ing firms will notreceive the Volume Concession on the sale of unitspurchased in Fee Accounts, however, such sales willbe included in determining whether a firm has met thesales level breakpoints set forth in the VolumeConcession table above. Secondary market sales ofall unit investment trusts are excluded for purposes ofthe Volume Concession. Eligible dealer firms andother selling agents include clearing firms that placeorders wi th Invesco and prov ide Invesco withinformation with respect to the representatives whoinitiated such transactions. Eligible dealer firms andother selling agents will not include firms that solelyprovide clearing services to other broker-dealer firmsor firms who place orders through clearing firms thatare eligible dealers. We reserve the right to changethe amount of the concessions or agencycommissions from time to time. For a trust to beeligible for this additional compensation, the trust’s

prospectus must include disclosure related to thisadditional compensation.

Additional Information. Except as provided in thissection, any sales charge discount provided toinvestors will be borne by the selling broker-dealer oragent. For all secondary market transactions the totalconcession or agency commission will amount to 80%of the applicable sales charge. Notwithstandinganything to the contrary herein, in no case shall the totalof any concessions, agency commissions and anyadditional compensation allowed or paid to any broker,dealer or other distributor of Units with respect to anyindividual transaction exceed the total sales chargeapplicable to such transaction. The Sponsor reservesthe right to reject, in whole or in part, any order for thepurchase of Units and to change the amount of theconcession or agency commission to dealers andothers from time to time.

We may provide, at our own expense and out ofour own profits, additional compensation and benefitsto broker-dealers who sell Units of the Portfolio andour other products. This compensation is intended toresult in additional sales of our products and/orcompensate broker-dealers and financial advisors forpast sales. We may make these payments formarketing, promotional or related expenses, including,but not limited to, expenses of entertaining retailcustomers and f inancia l advisors, advert is ing,sponsorship of events or seminars, obtaining shelfspace in broker-dealer firms and similar activitiesdesigned to promote the sale of the Portfolio and ourother products. Fees may include payment for travelexpenses, including lodging, incurred in connectionwith trips taken by invited registered representativesfor meetings or seminars of a business nature. Thesearrangements will not change the price you pay foryour Units.

Sponsor Compensation. The Sponsor will receivethe total sales charge applicable to each transaction.Except as provided under “Unit Distribution,” any salescharge discount provided to investors will be borne bythe selling dealer or agent. In addition, the Sponsor willrealize a profit or loss as a result of the differencebetween the price paid for the Securities by the

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Sponsor and the cost of the Securities to the Portfolioon the Initial Date of Deposit as well as on subsequentdeposits. See “Notes to Portfolio”. The Sponsor has notparticipated as sole underwriter or as manager or as amember of the underwriting syndicates or as an agentin a 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 heldby the Sponsor for sale to the public. In maintaining asecondary market, the Sponsor will realize profits orlosses in the amount of any difference between theprice at which Units are purchased and the price atwhich Units are resold (which price includes theapplicable sales charge) or from a redemption ofrepurchased Units at a price above or below thepurchase price. Cash, if any, made available to theSponsor prior to the date of settlement for the purchaseof Units may be used in the Sponsor’s business andmay be deemed to be a benefit to the Sponsor, subjectto the limitations of the Securities Exchange Act of1934, as amended (“1934 Act”).

The Sponsor or an affiliate may have participated in apublic offering of one or more of the Securities. TheSponsor, an affiliate or their employees may have a longor short position in these Securities or related securities.An affiliate may act as a specialist or market maker forthese Securities. An officer, director or employee of theSponsor or an affiliate may be an officer or director forissuers of the Securities.

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

charge 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,Simplified Employee Pension Plans for employees,qualified plans for self-employed individuals, andqualified corporate pension and profit sharing plans foremployees. The minimum purchase for these accountsis reduced to 25 Units but may vary by selling firm. Thepurchase of Units may be l imited by the plans’provisions and does not itself establish such plans.

FEE ACCOUNTS

As described above, Units may be available forpurchase by investors in Fee Accounts where thePortfolio is Fee Based Eligible. You should consult yourfinancial professional to determine whether you canbenefit from these accounts. This table illustrates thesales charge you will pay if the Portfolio is Fee BasedEligible 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 deny

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purchases of Units in Fee Accounts by investors orsel l ing f irms whose frequent trading activity isdetermined to be detrimental to the Portfolio. Topurchase Units in these Fee Accounts, your financialprofessional must purchase Units designated with oneof the Fee Based CUSIP numbers set forth under“Essential Information,” either Fee Based Cash for cashdistributions or Fee Based 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 the 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 securities in your Portfolioinclude ordinary income, but may also include sourcesother than ordinary income such as returns of capital,loan proceeds, short-term capital gains and long-termcapital gains (see “Taxation--Distributions”). In addition,the Portfolio will generally make required distributions atthe end of each year because it is structured as a“regulated investment company” for federal taxpurposes. Unitholders wi l l also receive a f inaldistribution of income when the Portfolio terminates. Aperson becomes a Unitholder of record on the date ofsettlement (generally two business days after Units areordered, or any shorter period as may be required bythe applicable rules under the 1934 Act). Unitholdersmay elect to receive distributions in cash or to havedistributions reinvested into additional Units. See“Rights of Unitholders--Reinvestment Option”.

Dividends and interest received by the Portfolio,including that part of the proceeds of any disposition ofPortfolio securities which represents accrued interest,are credited to the Income Account of the Portfolio.Other receipts (e.g., capital gains, proceeds from thesale of Securities, etc.) are credited to the CapitalAccount. Proceeds received on the sale of anySecurities, to the extent not used to meet redemptionsof Units or pay deferred sales charges, fees or

expenses, will be distributed to Unitholders. Proceedsreceived from the disposition of any Securities after aRecord Date and prior to the following Distribution Datewill be held in the Capital Account and not distributeduntil the next Distribution Date. Any distribution toUnitholders consists of each Unitholder’s pro rata shareof the avai lable cash in the Income and CapitalAccounts as of the related Record Date.

Historical and Estimated Distributions. TheHistorical 12 Month Distr ibutions per Unit, andEstimated Initial Distribution per Unit (if any), may beshown under “Essential Information.” These figures arebased upon the weighted average of the actualdistributions paid by the Covering Securities included inyour Portfolio over the 12 months preceding the InitialDate of Deposit and are reduced to account for theeffects of fees and expenses which will be incurredwhen investing in your Portfolio. While both figures arecalculated using a Public Offering Price of $10 per Unit,any presented Estimated Initial Distribution per Unit willreflect an estimate of the per Unit distributions you mayreceive on the first Distribution Date based upon eachissuer’s preceding 12 month distributions. Dividendpayments are not assured and therefore the amount offuture dividend income to your Portfolio is uncertain.The actual net annual distributions may decrease overtime because a portion of the securities included in yourPortfolio will be sold to pay for the organization costs,deferred sales charge and creation and developmentfee. Securities may also be sold to pay regular fees andexpenses during your Portfolio’s life. The actual netannual income distributions you receive will vary fromthe Historical 12 Month Distributions amount due tochanges in dividends and distribution amounts paid byCovering Security issuers, currency fluctuations, thesale of securities to pay any deferred sales charge,Portfolio fees and expenses, and with changes in yourPortfolio such as the acquisition, call, maturity or sale ofsecurities. Due to these and various other factors,actual income received by your Portfolio will most likelydiffer from the most recent dividends or scheduledincome payments. In particular, the actual net annualdistributions will be reduced if the Covering Securities

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are sold pursuant to the LEAPS prior to the Portfolio’stermination, and as Treasury Obligations mature.

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 theSponsor or the Trustee, but you are responsible forapplicable governmental charges, if any. Units redeemedby the Trustee will be canceled. You may redeem all or aportion of your Units by sending a request forredemption to your bank or broker-dealer through whichyou hold your Units. No later than two business days (orany shorter period as may be required by the applicablerules under the 1934 Act) following satisfactory tender,the Unitholder will be entitled to receive in cash anamount for each Unit equal to the Redemption Price perUnit next computed on the date of tender. The “date oftender” is deemed to be the date on which Units arereceived by the Trustee, except that with respect toUnits received by the Trustee after the Evaluation Timeor on a day which is not a business day, the date oftender is deemed to be the next business day.Redemption requests received by the Trustee after theEvaluation Time, and redemption requests received byauthorized financial professionals after the EvaluationTime or redemption requests received by such personsthat are not transmitted to the Trustee until after the timedesignated by the Trustee, are priced based on the dateof the next determined redemption price provided theyare received timely by the Trustee on such date. It is theresponsibility of authorized financial professionals totransmit redemption requests received by them to theTrustee so they will be received in a timely manner.Certain broker-dealers or selling firms may charge anorder handling fee for processing redemption requests.Units redeemed directly through the Trustee are notsubject to such fees.

The Trustee may sell Securities to satisfy Unitredemptions. To the extent that Securities are sold,the size of the Portfolio will be, and the diversity of thePortfolio may be, reduced. Sales may be required at atime when Securities would not otherwise be sold and

may result in lower prices than might otherwise berealized. The price received upon redemption may bemore or less than the amount paid by the Unitholderdepending on the value of the Securities at the time ofredemption. In particular, redemptions prior to theexpiration or exercise of the LEAPS in your Portfoliomay further decrease the amount received by aUnitholder. See “Risk Factors--LEAPS”.

The Redemption Price per Unit and the secondarymarket repurchase price per Unit are equal to the prorata share of each Unit in the Portfolio determined onthe basis of (i) the cash on hand in the Portfolio ormoney in the process of being collected, (ii) the value ofthe Securities in the Portfolio and (iii) accrued interest,dividends or other income distributions receivable onthe Securities in the Portfolio trading ex-dividend as ofthe date 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 theinitial offering period, the redemption price and thesecondary market repurchase price are not reduced byestimated organization costs or creation anddevelopment fee. For these purposes, the Trustee willdetermine the value of the Securities as describedunder “Public Offering--Unit Price”. Accrued interestpaid on redemption shall be withdrawn from the IncomeAccount or, if the balance therein is insufficient, from theCapital Account. All other amounts will be withdrawnfrom the Capital Account.

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 any periodduring which the SEC determines that trading on thatExchange is restricted or an emergency exists, as aresult of which disposal or evaluation of the Securities isnot reasonably practicable, or for other periods as theSEC may permit.

Exchange Option. When you redeem Units of yourPortfol io or when your Portfol io terminates (see“Rollover” below), you may be able to exchange your

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Units for units of other Invesco unit trusts. You shouldcontact your financial professional for more informationabout trusts currently available for exchanges. Beforeyou exchange Units, you should read the prospectus ofthe new trust carefully and understand the risks andfees. You should then discuss this option with yourfinancial professional to determine whether yourinvestment goals have changed, whether current trustssuit you and to discuss tax consequences. A rollover orexchange is a taxable event to you. We maydiscontinue this option at any time.

Rollover. We may offer a subsequent series of thePortfolio, for a Rollover when the Portfolio terminates.

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 distributions) 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 on theMandatory Termination Date. We do not anticipate thatthe sale period will be longer than one day, however,certain factors could affect the ability to sell theSecurities 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 strategy or objective as thecurrent Portfolio. We cannot guarantee that a Rollover willavoid any negative market price consequences resultingfrom trading large volumes of securities. Market pricetrends may make it advantageous to sell or buy securitiesmore quickly or more slowly than permitted by thePortfolio procedures. We may, in our sole discretion,modify a Rollover or stop creating units of a trust at any

time 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 which hasnot been reinvested in a Rollover will be distributed toUnitholders shortly after the Mandatory Termination Date.Rollover participants may receive taxable distributions orrealize taxable capital gains which are reinvested inconnection with a Rollover but may not be entitled to adeduction for capital losses due to the “wash sale” taxrules. Due to the reinvestment in a subsequent trust, nocash will be distributed to pay any taxes. See “Taxation”.

Units. Ownership of Units is evidenced in book-entryform only and will not be evidenced by certificates. Unitspurchased or held through your bank or broker-dealer willbe recorded in book-entry form and credited to theaccount of your bank or broker-dealer at Depository TrustCompany (“DTC”). Units are transferable by contactingyour bank or broker-dealer through which you hold yourUnits. Transfer, and the requirements therefore, will begoverned by the applicable procedures of DTC and youragreement with the DTC participant in whose name yourUnits are registered on the transfer records of DTC.

Reports Provided. Unitholders will receive astatement of dividends and other amounts received bythe 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 Portfolio is not amanaged fund 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 the Portfol io based on advice from the

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Supervisor. These situations may include events suchas the issuer having defaulted on payment of any of itsoutstanding obligations or the price of a Security hasdeclined to such an extent or other credit factors existso that in the opinion of the Supervisor retention of theSecurity would be detrimental to the Portfolio. CoveringSecurities may also be called pursuant to the LEAPSprior to the Mandatory Termination Date. If a publictender offer has been made for a Security or a mergeror acquisition has been announced affecting a Security,the Trustee may either sell the Security or accept anoffer if the Supervisor determines that the sale orexchange is in the best interest of Unitholders. TheTrustee will distribute any cash proceeds to Unitholders.In addition, the Trustee may sell Securities to redeemUnits or pay Portfolio expenses or deferred salescharges. If securities or property are acquired by thePortfolio, the Sponsor may direct the Trustee to sell thesecurities or property and distribute the proceeds toUnitholders or to accept the securities or property fordeposit in the Portfolio. Should any contract for theacquisition of any of the Securities fail, the Sponsor will(unless substantially all of the moneys held in thePortfolio to cover the acquisition are reinvested insubstitute Securities in accordance with the TrustAgreement) refund the cash and sales chargeattributable to the failed contract to all Unitholders on orbefore the next Distribution Date.

The Sponsor may direct the reinvestment ofproceeds of the sale of Securities if the sale is the directresult of serious adverse credit factors which, in theopinion of the Sponsor, would make retention of theSecurities detrimental to the Portfolio. In such a case,the Sponsor may, but is not obligated to, direct thereinvestment of sale proceeds in any other securitiesthat meet the criteria for inclusion in the Portfolio on theInitial Date of Deposit. The Sponsor may also instructthe Trustee to take action necessary to ensure that thePortfolio continues to satisfy the qualifications of aregulated investment company and to avoid impositionof tax on undistributed income of the Portfolio.

When your Portfolio sells Securities, the compositionand diversity of the Securities in the Portfolio may bealtered. Any additional Covering Securities deposited

will be subject to the LEAPS with the same terms as theLEAPS initially deposited. In order to obtain the bestprice for the Portfolio, it may be necessary for theSupervisor to specify minimum amounts (generally 100shares) in which blocks of Securities are to be sold. Ineffecting purchases and sales of portfolio securities, theSponsor may direct that orders be placed with andbrokerage commissions be paid to brokers, includingbrokers which may be affiliated with your Portfolio, theSponsor or dealers participating in the offering of Units.

Pursuant to an exemptive order, your Portfolio maybe permitted to sell Securities to a new trust when itterminates if those Securities are included in the newtrust. The exemption may enable your Portfolio toeliminate commission costs on these transactions. Theprice for those securities will be the closing sale priceon the sale date on the exchange where the Securitiesare principally 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 tomake 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. The Portfolio may beterminated at any time with consent of Unitholdersrepresenting two-thirds of the outstanding Units or bythe Trustee 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”). The Portfolio will be liquidated by the Trustee inthe event that a sufficient number of Units of yourPortfolio not yet sold are tendered for redemption bythe Sponsor, so that the net worth of your Portfoliowould be reduced to less than 40% of the value of the

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Securities at the time they were deposited in yourPortfolio. If your Portfolio is liquidated because of theredemption of unsold Units by the Sponsor, theSponsor will refund to each purchaser of Units theentire sales charge paid by such purchaser.

The scheduled Mandatory Termination Date set forthunder "Essential Information" will be subsequent to theexpiration of the LEAPS. If the LEAPS are exercisedprior to the expiration, the Portfolio will receive cash; ifthe LEAPS are not exercised, the Portfolio will continueto hold the Covering Securities in the Portfolio. If thePortfolio is terminated early, the Trustee will attempt toenter into a closing purchase transaction as a result ofwhich the LEAPS will be cancelled and then sell theunderlying Covering Securities.

The Trustee may begin to sel l Securit ies inconnection with your Portfolio termination nine businessdays before, and no later than, the MandatoryTermination Date. Unitholders will receive a final cashdistr ibution within a reasonable t ime after theMandatory Termination Date. All distributions will be netof your Portfolio’s expenses and costs. Unitholders willreceive a f inal distr ibution statement fol lowingtermination. The Information Supplement containsfurther information regarding termination of the Portfolio.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 forerrors in judgment, but shall be liable only for their ownwillful misfeasance, bad faith or gross negligence(negl igence in the case of the Trustee) in theperformance of their duties or by reason of theirreckless disregard of their obligations and dutieshereunder. The Trustee is not liable for depreciation orloss incurred by reason of the purchase or sale by theTrustee of any of the Securities. In the event of thefailure of the Sponsor to act under the Trust Agreement,the Trustee may act thereunder and is not liable for anyaction taken by it in good faith under the TrustAgreement. The Trustee is not liable for any taxes orother governmental charges imposed on the Securities,on it as Trustee under the Trust Agreement or on the

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 the Sponsorof your Portfolio. The Sponsor is a wholly ownedsubsidiary of Invesco Advisers, Inc. (“Invesco Advisers”).Invesco Advisers is an indirect wholly owned subsidiaryof Invesco 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, 2019, the totalstockholders’ equity of Invesco Capital Markets, Inc. was$94,146,402.00 (unaudited). The current assets undermanagement and supervision by Invesco Ltd. and itsaffiliates were valued at approximately $1,184.4 billion asof September 30, 2019.

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 ofcompensation deemed by the Trustee to be reasonableand not exceeding amounts prescribed by the SEC, (ii) terminate the Trust Agreement and liquidate thePortfolio as provided therein or (iii) continue to act asTrustee without terminating the Trust Agreement.

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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 of thePortfolio. Tax laws and interpretations are subject tochange, possibly with retroactive effect. Substantialchanges to the federal tax law were passed and signedinto law in December 2017, many of which becameeffective in 2018 and may affect your investment in thePortfolio in a number of ways, including possibleunintended consequences. This summary does notdescribe all of the tax consequences to all taxpayers.For example, this summary generally does not describeyour situation if you are a corporation, a non-U.S.person, a broker/dealer, a tax-exempt entity, financialinstitution, person who marks to market their Units orother investor with special circumstances. In addition,this section does not describe your alternativeminimum, state, local or foreign tax consequences ofinvesting in the Portfolio.

This federal income tax summary is based in part onthe advice of counsel to the Sponsor. The Internal

Revenue Service could disagree with any conclusionsset forth in this section. In addition, our counsel was notasked to review the federal income tax treatment of theassets to be deposited in the 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 willreceive a tax statement reporting your Portfolio’sdistributions, including the amounts of ordinary incomedistributions and capital gains dividends. Your Portfoliomay make taxable distributions to you even in periodsduring which the value of your Units has declined.Ordinary income distributions are generally taxed at yourfederal tax rate for ordinary income, however, as furtherdiscussed below, certain ordinary income distributionsreceived from your Portfolio may be taxed, under currentfederal law, at the capital gains tax rates. Certainordinary income dividends on Units that are attributableto qualifying dividends received by your Portfolio fromcertain corporations may be reported by the Portfolio asbeing eligible for the dividends received deduction forcorporate Unitholders provided certain holding periodrequirements are met. 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 currently are $250,000 in thecase of married couples filing joint returns and $200,000in the case of single individuals. In addition, your Portfoliomay make distributions that represent a return of capitalfor tax purposes to the extent of the Unitholder’s basis inthe Units, and any additional amounts in excess of basis

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would 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 incomefrom your Portfolio that you must take into account forfederal income tax purposes is not reduced by amountsused to pay a deferred sales charge, if any. The tax lawsmay require you to treat certain distributions made toyou in January as if you had received them on December31 of the 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.

Options. The Portfolio may write one or more calloptions (LEAPS) on certain Covering Securities in thePortfolio. Generally premiums received for writing optionsare not taxable at the time received, but instead aretaxed when the option expires, is exercised or is deemedto be sold. Thus, the amounts of the premiums willgenerally be taken into account at those times indetermining the amount of dividends to be paid to theUnitholder. These amounts may be part of the dividendstaxed as ordinary income or those taxed as long-termcapital gain, depending on the circumstances. Further,the Portfolio's transaction in options will be subject tospecial provisions of the Internal Revenue Code of 1986,as amended (the "Code") that, among other things, mayaffect the character of gains and losses realized by thePortfolio (i.e., may affect whether gains or losses areordinary or capital, or short term or long-term), mayaffect the amount of dividends which may be taken intoaccount as a dividend which is eligible for the capitalgains tax rates, may accelerate recognition of income tothe Portfolio and may defer the Portfolio's losses. Theserules could, therefore, affect the character, amount andtiming of distributions to Unitholders. These provisionsalso (a) may require the Portfolio to mark-to-marketcertain types of the positions in its portfolio (i.e., treatthem as if they were closed out), and (b) may cause the

Portfolio to recognize income without receiving cash withwhich to make distributions in amounts necessary tosatisfy the distribution requirements for qualifying to betaxed as a regulated investment company and foravoiding excise taxes.

Sale or Redemption of Units. If you sell orredeem your Units, you will generally recognize ataxable gain or loss. To determine the amount of thisgain or loss, you must subtract your adjusted tax basisin your Units from the amount you receive for the sale ofUnits. Your initial tax basis in your Units is generallyequal to the cost of your Units, generally including salescharges. In some cases, however, you may have toadjust your tax basis after you purchase your Units.

Capital Gains and Losses and CertainOrdinary Income Dividends. Net capital gain equalsnet long-term capital gain minus net short-term capitalloss for the taxable year. Capital gain or loss is long-term if the holding period for the asset is more than oneyear and is short-term if the holding period for the assetis one year or less. You must exclude the date youpurchase your Units to determine your holding period.However, if you receive a capital gain dividend from yourPortfolio and sell your Units at a loss after holding it forsix months or less, the loss will be recharacterized aslong-term capital loss to the extent of the capital gaindividend received. The tax rates for capital gainsrealized from assets held for one year or less aregenerally the same as for ordinary income.

In certain circumstances, ordinary income dividendsreceived by an individual Unitholder from a regulatedinvestment company such as the Portfolio may betaxed at the same federal rates that apply to netcapital gain (as discussed above), provided certainholding period requirements are satisfied and providedthe dividends are attributable to qualified dividendincome received by the Portfolio itself. Your Portfoliowill provide notice to its Unitholders of the amount ofany distribution which may be taken into account asqualified dividend income which is eligible for thecapital gains tax rates. There is no requirement that taxconsequences be taken into account in administeringyour Portfolio.

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Rollovers and Exchanges. If you elect to haveyour proceeds from your Portfolio rolled over into afuture trust, it would generally be considered a sale forfederal income tax purposes and any gain on the salewill be treated as a capital gain, and, in general, anyloss will be treated as a capital loss. However, any lossrealized on a sale or exchange will be disallowed to theextent that Units disposed of are replaced (includingthrough reinvestment of dividends) within a period of61 days beginning 30 days before and ending 30 daysafter disposition of Units or to the extent that theUnitholder, during such period, acquires or enters intoan option or contract to acquire, substantially identicalstock or securities. In such a case, the basis of theUnits acquired will be adjusted to reflect the disallowedloss. The deductibility of capital losses is subject toother limitations in the tax law.

Deductibility of Portfolio Expenses. Expensesincurred and deducted by your Portfolio will generally notbe 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.Recent legislation, effective in 2018, has suspended thedeductibility of expenses that are characterized asmiscellaneous itemized deductions, which includeinvestment expenses.

Foreign Investors. If you are a foreign investor (i.e.,an investor other than a U.S. citizen or resident or a U.S.corporation, partnership, estate or trust), generally, subjectto applicable tax treaties, distributions to you from thePortfolio will be characterized as dividends for federalincome tax purposes (other than dividends that thePortfolio reports as capital gain dividends) and will besubject to U.S. income taxes, including withholding taxes,subject to certain exceptions described below. You maybe eligible under certain income tax treaties for a reductionin withholding rates. However distributions received by aforeign investor from the Portfolio that are properlyreported by the trust as capital gain dividends may not besubject to U.S. federal income taxes, including withholdingtaxes, provided that the Portfolio makes certain electionsand certain other conditions are met.

The Foreign Account Tax Compliance Act(“FATCA”). A 30% withholding tax on your Portfolio’sdistributions generally applies if paid to a foreign entityunless: (i) if the foreign entity is a “foreign financialinstitution” as defined under FATCA, the foreign entityundertakes certa in due di l igence, report ing,withholding, and certification obligations, (ii) if theforeign entity is not a “foreign financial institution,” itidentifies certain of its U.S. investors or (iii) the foreignentity is otherwise excepted under FATCA. If requiredunder the rules above and subject to the applicabilityof any intergovernmental agreements between theUnited States and the relevant foreign country,withholding under FATCA may apply. Under existingregulations, FATCA withholding on gross proceedsfrom the sale of Units and capital gain distributionsfrom your Portfolio took effect on January 1, 2019;however, recently proposed U.S. tax regulations, iff inalized in their proposed form, would eliminateFATCA withholding on such types of payments. Ifwithholding is required under FATCA on a paymentrelated to your Units, investors that otherwise wouldnot be subject to withholding (or that otherwise wouldbe entitled to a reduced rate of withholding) on suchpayment generally will be required to seek a refund orcredit from the IRS to obtain the benefit of suchexemption or reduction. Your Portfolio will not pay anyadditional amounts in respect of amounts withheldunder FATCA. You should consult your tax advisorregarding the effect of FATCA based on yourindividual circumstances.

Foreign Tax Credit. If the Portfolio invests in anyforeign securities, the tax statement that you receivemay include an item showing foreign taxes the Portfoliopaid to other countries. In this case, dividends taxed toyou will include your share of the taxes the Portfolio paidto other countries. You may be able to deduct orreceive a tax credit for your share of these taxes if thePortfolio meets certain requirements for passing throughsuch deductions or credits to you.

Backup Withholding. By law, your Portfolio mustwithhold as backup withholding a percentage (currently24%) of your taxable distributions and redemptionproceeds if you do not provide your correct social

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security 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 the Portfolio.

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 establishment ofyour Portfolio. These costs and charges will include thecost 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 and

for 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 fromproceeds 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 ofmiscellaneous Portfolio expenses). The Trustee benefitsto the extent there are funds in the Capital and IncomeAccounts since these Accounts are non-interest bearingto Unitholders and the amounts earned by the Trusteeare retained by the Trustee. Part of the Trustee’scompensation for its services to your Portfolio isexpected to result from the use of these funds.

Compensation of Sponsor and Supervisor.The Sponsor and the Supervisor, which is an affiliate ofthe Sponsor, 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 allInvesco unit investment trusts in any calendar yearexceed the aggregate cost of providing these servicesin 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 wilful

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misconduct 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.Your Portfolio may pay the expenses of updating itsregistration statement each year. The Portfolio will pay alicense fee to S&P DJI for use of certain trademarks andother property.

OTHER MATTERS

Legal Opinions. The legality of the Units offeredhereby has been passed upon by Morgan, Lewis &Bockius LLP. Dorsey & Whitney LLP has acted ascounsel to the Trustee.

Independent Registered Public AccountingFirm. The statement of condition and the relatedportfol io included in this prospectus have beenaudi ted 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 of1933 and the Investment Company Act of 1940 (fileno. 811-02754). The Information Supplement, whichhas been filed with the SEC and is incorporated hereinby reference, includes more detailed informationconcerning the Securit ies, investment risks andgeneral information about the Portfolio. Reports andother information about your Portfolio are available onthe EDGAR Database on the SEC’s Internet site athttp://www.sec.gov. Copies of this information may beobtained, after paying a duplication fee, by electronicrequest at the fo l lowing e-mai l address:publicinfo@sec.gov or by writing the SEC’s PublicReference Section, Washington, DC 20549-0102.

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TABLE OF CONTENTS

Title Page

Dividend Sustainability Buy-Write Portfolio .......... 2Notes to Portfolio ................................................. 9Report of Independent Registered

Public Accounting Firm..................................... 10Statement of Condition ....................................... 11The Portfolio....................................................... A-1Objective and Securities Selection ..................... A-2Covered Call Strategy ........................................ A-2Risk Factors ...................................................... A-4Public Offering ................................................... A-7Retirement Accounts ......................................... A-12Fee Accounts .................................................... A-12Rights of Unitholders ......................................... A-13Portfolio Administration ...................................... A-15Taxation ............................................................. A-18Portfolio Operating Expenses ............................. A-21Other Matters .................................................... A-22Additional Information ........................................ A-22

______________When Units of the Portfolio 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 withrespect to future Portfolio series and may be changed. Noperson may sell Units of future Portfolios until a registrationstatement is f i led with the Secur i t ies and ExchangeCommission and is effective. This prospectus is not an offerto sell Units and is not soliciting an offer to buy Units in anystate where the offer or sale is not permitted.

U-EMSPRO2007

PROSPECTUS

October 23, 2019

Dividend Sustainability Buy-WritePortfolio 2019-4

Please retain this prospectus for future reference.

INVESCO