Supplement Dated: March 13, 2019

INVESCO UNIT TRUSTS, SERIES 1944 Multi-Asset High Income Portfolio 2019-1 Supplement to the Prospectus As a result of a previously announced reorganization, Antero Midstream GP LP has been renamed Antero Midstream Corp. ( AM ). Notwithstanding anything to the contrary in the Prospectus, the Portfolio now holds, and will continue to purchase, shares of AM. Supplement Dated: March 13, 2019 U-EMSSPT1944

INVESCO UNIT TRUSTS, SERIES 1939 MLP & Income Portfolio 2019-1 INVESCO UNIT TRUSTS, SERIES 1944 Multi-Asset High Income Portfolio 2019-1 Supplement to the Prospectuses Immediately following the completion of a previously announced merger of Western Gas Equity Partners, LP ( WGP ) into a wholly owned subsidiary, WGP changed its name to Western Midstream Partners, LP ( WES ). Notwithstanding anything to the contrary in the Prospectuses, each Portfolio now holds, and will continue to purchase, shares of WES. Supplement Dated: February 28, 2019 U-EMSSPT1939,1944

High Income Allocation Portfolio 2019-1 Preferred Opportunity Portfolio 2019-1 Multi-Asset High Income Portfolio 2019-1 Each unit investment trust named above (the Portfolios ), included in Invesco Unit Trusts, Series 1944, invests in a portfolio of securities. Of course, we cannot guarantee that a Portfolio will achieve its objective. With respect to the High Income Allocation Portfolio and the Multi-Asset High Income Portfolio an investment can be made in the underlying funds directly rather than through the Portfolios. These direct investments can be made without paying either Portfolio s sales charge, operating expenses and organization costs. February 6, 2019 You should read this prospectus and retain it for future reference. The Securities and Exchange Commission has not approved or disapproved of the Units or passed upon the adequacy or accuracy of this prospectus. Any contrary representation is a criminal offense. INVESCO

High Income Allocation Portfolio Investment Objective. The Portfolio seeks to provide current income and the potential for capital appreciation. Principal Investment Strategy. The Portfolio seeks to achieve its objective by investing in an incomeoriented portfolio consisting of common stocks, closedend funds and preferred securities. Invesco Capital Markets, Inc., the Sponsor, has defined two specific segments of the market to be represented in the Portfolio: High Income/Low Volatility and High Income/High Volatility. In determining the asset classes and sectors to correspond with each segment, the Sponsor conducted research on both near-term and longer-term yields, performance and volatility, including specific asset class and security traits that are typically associated with higher or lower price volatility compared to the broader market. High Income/Low Volatility asset classes, sectors and industries include utilities, telecommunication services, consumer staples, health care and large cap dividend paying stocks. High Income/High Volatility asset classes and sectors include business development companies ( BDCs ), real estate investment trusts ( REITs ), mortgage REITs, master limited partnerships ( MLPs ) and preferred securities. The Sponsor seeks to divide the Portfolio s exposure between high and low volatility asset classes through a balanced allocation to each of the five asset classes within their volatility segment. Within the High Income/High Volatility segment, exposure to BDCs is captured through the investment in closed-end funds. The REITs were selected based on factors including property sector, regional markets exposure, capital markets access and real estate fundamentals. The mortgage REITs were selected based on valuation, yield sustainability, and overall volatility and risk levels. The MLPs were selected based on factors including cash-flow analysis, distribution sustainability and growth, as well as overall volatility and risk profile. In selecting the preferred securities for the Portfolio, the Sponsor considered factors such as current yield, credit ratings and industry and company trends and fundamentals. The stocks within the High Income/Low Volatility segment were selected based on factors such as dividend yield, dividend growth, market capitalization, volatility and earnings growth and outlook relative to the sector. In selecting the closed-end funds for the Portfolio, the Sponsor sought to invest in funds representative of asset classes with generally attractive income opportunities. In addition, the Sponsor assembled the final portfolio based on the consideration of factors including, but not limited to, manager performance, valuation, current dividend level and sustainability, diversification, credit quality and liquidity. Approximately 10% of the Portfolio consists of funds that are classified as non-diversified under the Investment Company Act of 1940. These funds have the ability to invest a greater portion of their assets in obligations of a single issuer. As a result, these funds may be more susceptible to volatility than a more widely diversified fund. Of course, we cannot guarantee that your Portfolio will achieve its objective. The value of your Units may fall below the price you paid for the Units. You should read the Risk Factors section before you invest. The Portfolio is designed as part of a long-term investment strategy. The Sponsor may offer a subsequent series of the portfolio when the current Portfolio terminates. As a result, you may achieve more consistent overall results by following the strategy through reinvestment of your proceeds over several years if subsequent series are available. Repeatedly rolling over an investment in a unit investment trust may differ from long-term investments in other investment products when considering the sales charges, fees, expenses and tax consequences attributable to a Unitholder. For more information see Rights of Unitholders--Rollover. Principal Risks. As with all investments, you can lose money by investing in this Portfolio. The Portfolio 2

also might not perform as well as you expect. This can happen for reasons such as these: Security prices will fluctuate. The value of your investment may fall over time. A security issuer may be unable to issue distributions, or to make payments of interest, dividends or principal in the future. This may reduce the level of income certain of the Portfolio s securities pay which would reduce your income and may cause the value of your Units to fall. The financial condition of a security issuer may worsen or its credit ratings may drop, resulting in a reduction in the value of your Units. This may occur at any point in time, including during the initial offering period. You could experience dilution of your investment if the size of the Portfolio is increased as Units are sold. There is no assurance that your investment will maintain its proportionate share in the Portfolio s profits and losses. The Portfolio invests significantly in stocks of large cap companies. Large cap companies are more mature and may grow more slowly than the economy as a whole and tend to go in and out of favor based on market and economic conditions. The Portfolio invests in preferred securities. Preferred securities are typically subordinated to bonds and other debt instruments in a company s capital structure in terms of priority to corporate income and therefore are subject to greater risk than those debt instruments. Preferred securities are subject to interest rate risk, meaning that their values may fall if interest rates, in general, rise. In a low interest rate environment risks associated with rising rates are heightened. The negative impact on fixed income securities from any interest rate increases could be swift and significant. In addition to the other risks described herein, income payments on certain preferred securities may be deferred, which may reduce the amount of income you receive on your Units. The Portfolio invests in MLPs. Most MLPs operate in the energy sector and are subject to the risks generally applicable to companies in that sector, including commodity pricing risk, supply and demand risk, depletion risk and exploration risk. MLPs are also subject to the risk that regulatory or legislative changes could limit or eliminate the tax benefits enjoyed by MLPs which could have a negative impact on the after-tax income available for distribution by the MLPs and/or the value of the Portfolio s investments. The Portfolio invests in shares of closed-end funds. You should understand the section titled Closed-End Funds before you invest. In particular, shares of closed-end funds tend to trade at a discount from their net asset value and are subject to risks related to factors such as management s ability to achieve a fund s objective, market conditions affecting a fund s investments and use of leverage. The underlying funds have management and operating expenses. You will bear not only your share of the Portfolio s expenses, but also the expenses of the underlying funds. By investing in other funds, the Portfolio incurs greater expenses than you would incur if you invested directly in the funds. Certain securities in the Portfolio, as well as certain of the securities held by the underlying funds in the Portfolio, may be rated below investment grade and considered to be junk or high-yield securities. Securities rated below BBB- by Standard & Poor s or Fitch Ratings or below Baa3 by Moody s are considered to be below 3

investment grade. These securities are considered to be speculative and are subject to greater market and credit risks. Accordingly, the risk of default is higher than with investment grade securities. In addition, these securities may be more sensitive to interest rate changes and may be more likely to make early returns of principal. The Portfolio invests in shares of REITs and other real estate companies. Shares of REITs and other real estate companies may appreciate or depreciate in value, or pay dividends depending upon global and local economic conditions, changes in interest rates and the strength or weakness of the overall real estate market. Negative developments in the real estate industry will affect the value of your investment more than would be the case in a more diversified investment. The Portfolio invests in shares of publicly traded business development companies ( BDCs ). BDCs invest in privately-held companies, the securities of which are generally less liquid than are publicly traded securities. BDCs may have relatively concentrated investment portfolios, consisting of a relatively small number of holdings. A BDC s gains and losses may be magnified through the use of leverage. BDCs generally depend on access to capital markets in order to raise cash, acquire suitable investments and monitor and implement certain financial strategies. An inability to access these markets may have a negative impact on the value of BDC shares and the value of your units. Many debt investments in which BDCs invest will not be rated by a credit rating agency and will be below investment grade quality. We do not actively manage the Portfolio. Except in limited circumstances, the Portfolio will hold, and may continue to buy, shares of the same securities even if their market value declines. 4

Fee Table The amounts below are estimates of the direct and indirect expenses that you may incur based on a $10 Public Offering Price per Unit. Actual expenses may vary. As a % of Public Amount Offering Per 100 Sales Charge Price Units Initial sales charge 0.000% $ 0.000 Deferred sales charge 2.250 22.500 Creation and development fee 0.500 5.000 Maximum sales charge 2.750% $27.500 As a % Amount of Net Per 100 Assets Units Estimated Organization Costs 0.330% $ 3.197 Estimated Annual Expenses Trustee s fee and operating expenses 0.191% $ 1.848 Supervisory fee, bookkeeping and administrative fees 0.057 0.550 Underlying fund expenses 0.989 9.590* Total 1.237% $11.988** Example This example helps you compare the cost of the Portfolio with other unit trusts and mutual funds. In the example we assume that the expenses do not change and that the Portfolio s annual return is 5%. Your actual returns and expenses will vary. This example also assumes that you continue to follow the Portfolio strategy and roll your investment, including all distributions, into a new trust every two years subject to a sales charge of 2.75%. Based on these assumptions, you would pay the following expenses for every $10,000 you invest in the Portfolio: 1 year $ 427 3 years 993 5 years 1,583 10 years 2,982 * Certain of the Portfolio s underlying funds are business development companies which may be subject to performance-based fees. This could result in higher than expected annual expenses per 100 units. ** The estimated annual expenses are based upon the estimated trust size for the Portfolio determined as of the initial date of deposit. Because certain of the operating expenses are fixed amounts, if the Portfolio does not reach the estimated size, or if the value of the Portfolio or number of outstanding units decline over the life of the trust, or if the actual amount of the operating expenses exceeds the estimated amounts, the actual amount of the operating expenses per 100 units would exceed the estimated amounts. In some cases, the actual amount of operating expenses may substantially differ from the amounts reflected above. The maximum sales charge is 2.75% of the Public Offering Price per 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, the initial sales charge is the difference between the total sales charge (maximum of 2.75% of the Public Offering Price) and the sum of the remaining deferred sales charge and the creation and development fee. The deferred sales charge is fixed at $0.225 per Unit and accrues daily from June 10, 2019 through November 9, 2019. Your Portfolio pays a proportionate amount of this charge on the 10th day of each month beginning in the accrual period until paid in full. The combination of the initial and deferred sales charges comprises the transactional sales charge. The creation and development fee is fixed at $0.05 per unit and is paid at the earlier of the end of the initial offering period (anticipated to be three months) or six months following the Initial Date of Deposit. For more detail, see Public Offering Price - General. Although not an actual operating expense, the Portfolio, and therefore the Unitholders, will indirectly bear the operating expenses of the funds held by the Portfolio in the estimated amount provided above. Estimated fund expenses are based upon the net asset value of the number of fund shares held by the Portfolio per Unit multiplied by the annual operating expenses of the funds for the most recent fiscal year. The Trustee or Sponsor will waive fees otherwise payable by the Portfolio in an amount equal to any 12b-1 fees or other compensation the Trustee, the Sponsor or an affiliate receives from the funds in connection with the Portfolio s investment in the funds, including license fees receivable by an affiliate of the Sponsor from a fund. Essential Information Unit Price at Initial Date of Deposit $10.0000 Initial Date of Deposit February 6, 2019 Mandatory Termination Date February 22, 2021 Historical Annual Distributions 1 $0.52440 per Unit Record Dates 10th day of March 2019 and each month thereafter Distribution Dates 25th day of March 2019 and each month thereafter CUSIP Numbers Cash 46143A587 Reinvest 46143A595 Fee Based Cash 46143A603 Fee Based Reinvest 46143A611 1 As of close of business day prior to Initial Date of Deposit. The actual distributions you receive will vary from this per Unit amount due to changes in the Portfolio s fees and expenses, in actual income received by the Portfolio, currency fluctuations and with changes in the Portfolio such as the acquisition or liquidation of securities. See Rights of Unitholders--Historical and Estimated Distributions. 5

High Income Allocation Portfolio 2019-1 Portfolio Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) COMMON STOCKS - 49.88% Consumer Discretionary - 2.03% 17 McDonald's Corporation $ 177.570 2.61% $ 3,018.69 Consumer Staples - 9.91% 60 Coca-Cola Company 49.260 3.17 2,955.60 26 PepsiCo, Inc. 112.900 3.29 2,935.40 39 Philip Morris International, Inc. 75.810 6.02 2,956.59 30 Procter & Gamble Company 97.440 2.94 2,923.20 31 Walmart, Inc. 95.600 2.18 2,963.60 Energy - 2.01% 25 Chevron Corporation 119.480 3.98 2,987.00 Financials - 1.97% 7 BlackRock, Inc. 417.560 3.16 2,922.92 Health Care - 9.92% 45 CVS Health Corp 65.670 3.05 2,955.15 22 Johnson & Johnson 132.880 2.71 2,923.36 + 34 Medtronic plc 88.030 2.27 2,993.02 38 Merck & Company, Inc. 77.150 2.85 2,931.70 70 Pfizer, Inc. 42.110 3.42 2,947.70 Information Technology - 4.00% 11 Broadcom, Inc. 270.000 3.93 2,970.00 63 Cisco Systems, Inc. 47.260 2.79 2,977.38 Telecommunication Services - 10.02% 167 AT&T, Inc. 29.630 6.88 4,948.21 341 CenturyLink, Inc. 14.580 14.81 4,971.78 92 Verizon Communications, Inc. 54.140 4.45 4,980.88 Utilities - 10.02% 38 American Electric Power Company, Inc. 79.010 3.39 3,002.38 41 Dominion Energy, Inc. 71.930 5.10 2,949.13 34 Duke Energy Corporation 88.500 4.19 3,009.00 63 Exelon Corporation 47.290 2.92 2,979.27 54 Public Service Enterprise Group, Inc. 54.900 3.28 2,964.60 MASTER LIMITED PARTNERSHIPS (4) - 10.04% 197 Energy Transfer, L.P. 15.100 8.08 2,974.70 104 Enterprise Products Partners, L.P. 28.580 6.09 2,972.32 50 Magellan Midstream Partners, L.P. 60.160 6.63 3,008.00 85 MPLX, L.P. 35.200 7.36 2,992.00 59 Phillips 66 Partners, L.P. 50.500 6.61 2,979.50 6

High Income Allocation Portfolio 2019-1 Portfolio (continued) Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) REAL ESTATE INVESTMENT TRUSTS - 20.07% Mortgage REITs - 10.03% 162 Apollo Commercial Real Estate Finance, Inc. $ 18.400 10.00% $ 2,980.80 86 Blackstone Mortgage Trust, Inc. - CL A 34.600 7.17 2,975.60 155 Chimera Investment Corporation 19.170 10.43 2,971.35 175 New Residential Investment Corporation 17.060 11.72 2,985.50 135 Starwood Property Trust, Inc. 22.170 8.66 2,992.95 REITs - 10.04% 66 American Campus Communities, Inc. 45.770 4.02 3,020.82 25 Crown Castle International Corporation 119.220 3.77 2,980.50 96 HCP, Inc. 31.330 4.72 3,007.68 43 Realty Income Corporation 69.320 3.85 2,980.76 16 Simon Property Group, Inc. 184.000 4.46 2,944.00 CLOSED-END FUNDS (5) - 10.02% 179 Ares Capital Corporation 16.650 9.37 2,980.35 79 Main Street Capital Corporation 37.510 6.24 2,963.29 211 New Mountain Finance Corporation 14.050 9.68 2,964.55 144 Solar Capital, Ltd. 20.810 7.88 2,996.64 150 TPG Specialty Lending, Inc. 20.000 7.80 3,000.00 Cost of Number Redemption Market Value Securities to of Shares Name of Issuer (1) Rating (6) Provisions (7) per Share (2) Portfolio (2) PREFERRED SECURITIES - 9.99% 110 Citigroup, Inc. - Series J BB+ 9/30/23 @ 25 $ 27.000 $ 2,970.00 7.125% 112 Goldman Sachs Group, Inc. - Series K BB 5/10/24 @ 25 26.600 2,979.20 6.375% 119 JPMorgan Chase & Company - Series DD BBB- 12/1/23 @ 25 25.010 2,976.19 5.750% 116 Morgan Stanley - Series K BB+ 4/15/27 @ 25 25.550 2,963.80 5.850% 116 Wells Fargo & Company - Series Q BBB- 9/15/23 @ 25 25.610 2,970.76 5.850% 4,138 $148,697.82 See Notes to Portfolios. 7

Preferred Opportunity Portfolio Investment Objective. The Portfolio seeks an attractive level of current income. Principal Investment Strategy. The Portfolio seeks to achieve its objective by investing in a portfolio consisting of preferred securities issued primarily by financial institutions such as banks and insurance companies. Invesco Capital Markets, Inc. is the Sponsor of your Portfolio. In selecting the Portfolio, the Sponsor considered many factors, including industry and company trends and fundamentals, the broader economic backdrop and the current regulatory environment. Valuation screens were implemented which considered, among other things, security call features, premiums and discounts, and liquidity. Paramount in the selection process was fundamental credit quality and diversification considerations. As of the Initial Date of Deposit, certain securities included in the Portfolio are rated below-investment grade by both Standard & Poor s and Moody s Investors Service, Inc. See Risk Factors--High-Yield Security Risk. The preferred securities selected for the Portfolio consist of traditional preferred securities, hybridpreferred securities and senior debt instruments that have the trading characteristics of exchange-listed preferred securities. Traditional preferred securities may be issued by an entity taxable as a corporation and pay fixed or floating rate dividends. However, these claims are subordinated to more senior creditors, including senior debt holders. Companies generally pay dividends on preferred securities before paying dividends on common stock, and the claims of preferred securities holders are ahead of common stockholders claims on assets in a corporate liquidation. Hybrid-preferred securities, including trust preferred securities, are debt instruments that have characteristics similar to those of traditional preferred securities. Hybrid-preferred securities may be issued by corporations, generally in the form of interestbearing notes with preferred securities characteristics, or by an affiliated trust or partnership of the corporation, generally in the form of preferred interests in subordinated debentures or similarly structured securities. The hybrid-preferred securities market consists of both fixed and adjustable coupon rate securities that are either perpetual in nature or have stated maturity dates. Hybrid-preferred holders generally have claims to assets in a corporate liquidation that are senior to those of traditional preferred securities but subordinate to those of senior debt holders. Certain subordinated debt and senior debt issues that have preferred characteristics are also considered to be part of the broader preferred securities market. Certain Portfolio securities may pay dividends that are eligible for the corporate dividends received deduction for corporations or for treatment as qualified dividend income for individuals. See Taxation. The preferred securities selected for the Portfolio generally pay a fixed rate of return during the life of the Portfolio and are sold on the basis of current yield. Although the underlying securities may pay quarterly or semi-annual distributions of income, the Portfolio is designed to make monthly distributions to Unitholders. The preferred securities in the Portfolio may be called or redeemed during the life of the Portfolio. Of course, we cannot guarantee that your Portfolio will achieve its objective. The value of your Units may fall below the price you paid for the Units. You should read the Risk Factors section before you invest. The Portfolio is designed as part of a long-term investment strategy. The Sponsor may offer a subsequent series of the portfolio when the current Portfolio terminates. As a result, you may achieve more consistent overall results by following the strategy through reinvestment of your proceeds over several years if subsequent series are available. Repeatedly rolling over an investment in a unit investment trust may differ from long-term investments 8

in other investment products when considering the sales charges, fees, expenses and tax consequences attributable to a Unitholder. For more information see Rights of Unitholders--Rollover. Principal Risks. As with all investments, you can lose money by investing in this Portfolio. The Portfolio also might not perform as well as you expect. This can happen for reasons such as these: Prices of the securities in the Portfolio will fluctuate. The value of your investment may fall over time. The value of preferred securities may fall if interest rates, in general, rise. In a low interest rate environment risks associated with rising rates are heightened. The negative impact on preferred income securities from any interest rate increases could be swift and significant. No one can predict whether interest rates will rise or fall in the future. An issuer may be unable to make dividend or interest payments in the future. This may result in a reduction in the value of your Units. The financial condition of an issuer may worsen or its credit ratings may drop, resulting in a reduction in the value of your Units. This may occur at any point in time, including during the initial offering period. You could experience dilution of your investment if the size of the Portfolio is increased as Units are sold. There is no assurance that your investment will maintain its proportionate share in the Portfolio s profits and losses. The Portfolio will receive early returns of principal if securities are called or sold before the Portfolio termination. If this happens your income will decline and you may not be able to reinvest the money you receive at as high a yield. In addition, the value of your Units may decline if any Portfolio securities trading at a premium are called at par. The Portfolio invests solely in preferred and debt securities. Preferred securities are typically subordinated to bonds and other debt instruments in a company s capital structure in terms of priority to corporate income and therefore are subject to greater risk than those debt instruments. In addition to the other risks described herein, income payments on most preferreds are noncumulative and can be deferred indefinitely; distributions on certain hybrid-trust preferreds may be skipped or deferred. This deferred risk may reduce the amount of income you receive on your Units. Securities of foreign companies in the Portfolio present risks beyond those of U.S. issuers. These risks may include market and political factors related to the company s foreign market, international trade conditions, less regulation, smaller or less liquid markets, increased volatility, differing accounting practices and changes in the value of foreign currencies. Certain preferred securities in the Portfolio are rated below investment grade and considered to be junk or high-yield securities. Securities rated below BBB- by Standard & Poor s or Fitch Ratings or below Baa3 by Moody s are considered to be below investment grade. These securities are considered to be speculative and are subject to greater market and credit risks. Accordingly, the risk of default is higher than with investment grade securities. In addition, these securities may be more sensitive to interest rate changes and may be more likely to make early returns of principal. 9

The Portfolio is concentrated in securities issued by banks and other companies in the financial services sector. Negative developments in this sector will affect the value of your investment more than would be the case in a more diversified investment. We do not actively manage the Portfolio. Except in limited circumstances, the Portfolio will hold, and may continue to buy, the same securities even if their market value declines. 10

Fee Table The amounts below are estimates of the direct and indirect expenses that you may incur based on a $10 Public Offering Price per Unit. Actual expenses may vary. As a % of Public Amount Offering Per 100 Sales Charge Price Units Initial sales charge 0.000% $ 0.000 Deferred sales charge 2.250 22.500 Creation and development fee 0.500 5.000 Maximum sales charge 2.750% $27.500 As a % Amount of Net Per 100 Assets Units Estimated Organization Costs 0.439% $4.255 Estimated Annual Expenses Trustee s fee and operating expenses 0.231% $2.235 Supervisory, bookkeeping and administrative fees 0.057 0.550 Total 0.288% $2.785* Example This example helps you compare the cost of the Portfolio with other unit trusts and mutual funds. In the example we assume that the expenses do not change and that the Portfolio s annual return is 5%. Your actual returns and expenses will vary. This example also assumes that you continue to follow the Portfolio strategy and roll your investment, including all distributions, into a new trust every two years subject to a sales charge of 2.75%. Based on these assumptions, you would pay the following expenses for every $10,000 you invest in the Portfolio: 1 year $ 345 3 years 740 5 years 1,159 10 years 2,112 The maximum sales charge is 2.75% of the Public Offering Price per 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, the initial sales charge is the difference between the total sales charge (maximum of 2.75% of the Public Offering Price) and the sum of the remaining deferred sales charge and the creation and development fee. The deferred sales charge is fixed at $0.225 per Unit and accrues daily from June 10, 2019 through November 9, 2019. Your Portfolio pays a proportionate amount of this charge on the 10th day of each month beginning in the accrual period until paid in full. The combination of the initial and deferred sales charges comprises the transactional sales charge. The creation and development fee is fixed at $0.05 per Unit and is paid at the earlier of the end of the initial offering period (anticipated to be three months) or six months following the Initial Date of Deposit. For more detail, see Public Offering Price - General. Essential Information Unit Price at Initial Date of Deposit $10.0000 Initial Date of Deposit February 6, 2019 Mandatory Termination Date February 22, 2021 Historical Annual Distribution 1 Estimated Initial Distribution 1 $0.53901 per Unit $0.05 per Unit Record Dates 10th day of March 2019 and each month thereafter Distribution Dates 25th day of March 2019 and each month thereafter CUSIP Numbers Cash 46143A629 Reinvest 46143A637 Fee Based Cash 46143A645 Fee Based Reinvest 46143A652 1 As of close of business day prior to Initial Date of Deposit. The actual distributions you receive will vary from this per Unit amount due to changes in the Portfolio s fees and expenses, in actual income received by the Portfolio, currency fluctuations and with changes in the Portfolio such as the acquisition or liquidation of securities. See Rights of Unitholders--Historical and Estimated Distributions. * The estimated annual expenses are based upon the estimated trust size for the Portfolio determined as of the initial date of deposit. Because certain of the operating expenses are fixed amounts, if the Portfolio does not reach the estimated size, or if the value of the Portfolio or number of outstanding units decline over the life of the trust, or if the actual amount of the operating expenses exceeds the estimated amounts, the actual amount of the operating expenses per 100 units would exceed the estimated amounts. In some cases, the actual amount of operating expenses may substantially differ from the amounts reflected above. 11

Preferred Opportunity Portfolio 2019-1 Portfolio Cost of Number Redemption Market Value Securities to of Shares Name of Issuer (1) Rating (6) Provisions (7) per Share (2) Portfolio (2) Banks - 29.98% 200 Bank of America Corporation - Series GG BBB- 5/16/23 @ 25 $ 25.980 $ 5,196.00 6.000% 115 BB&T Corporation - Series H BBB- 6/1/21 @ 25 25.870 2,975.05 5.625% 165 Citigroup, Inc. - Series J BB+ 9/30/23 @ 25 27.000 4,455.00 7.125% 164 Fifth Third Bancorp - Series I BB+ 12/31/23 @ 25 27.240 4,467.36 6.625% 123 First Republic Bank - Series I BBB- 6/30/23 @ 25 24.240 2,981.52 5.500% 115 Huntington Bancshares, Inc. - Series D BB+ 4/15/21 @ 25 25.800 2,967.00 6.250% 238 JPMorgan Chase & Company - Series DD BBB- 12/1/23 @ 25 25.010 5,952.38 5.750% 168 PNC Financial Services Group, Inc. - Series P BBB- 5/1/22 @ 25 26.460 4,445.28 6.125% 195 Regions Financial Corporation - Series B BB+ 9/15/24 @ 25 26.550 5,177.25 6.375% 233 Wells Fargo & Company - Series Q BBB- 9/15/23 @ 25 25.610 5,967.13 5.850% Capital Markets - 13.50% 114 Charles Schwab Corporation - Series D BBB 6/1/21 @ 25 26.020 2,966.28 5.950% 224 Goldman Sachs Group, Inc. - Series K BB 5/10/24 @ 25 26.600 5,958.40 6.375% 232 Morgan Stanley - Series K BB+ 4/15/27 @ 25 25.550 5,927.60 5.850% 89 Oaktree Capital Group, LLC. - Series A BBB 6/15/23 @ 25 24.950 2,220.55 6.625% 113 State Street Corporation - Series D BBB 3/15/24 @ 25 26.570 3,002.41 5.900% Consumer Finance - 3.01% 186 Capital One Financial Corporation - Series G BB 12/1/21 @ 25 24.140 4,490.04 5.200% Electric Utilities - 8.01% 121 Dominion Energy, Inc. - Series A BBB- 7/30/21 @ 25 24.580 2,974.18 5.250% Due 7/30/2076 178 Duke Energy Corporation BBB 9/15/23 @ 25 25.030 4,455.34 5.625% Due 09/15/2078 182 NextEra Energy Capital Holdings, Inc. - Series K (8) BBB 6/1/21 @ 25 24.600 4,477.20 5.250% Due 06/01/2076 Energy - 6.03% + 116 Enbridge, Inc. BBB- 4/15/23 @ 25 25.420 2,948.72 6.375% Due 04/15/2078 248 Energy Transfer Operating, L.P. - Series C BB 5/15/23 @ 25 24.250 6,014.00 7.375% 12

Preferred Opportunity Portfolio 2019-1 Portfolio (continued) Cost of Number Redemption Market Value Securities to of Shares Name of Issuer (1) Rating (6) Provisions (7) per Share (2) Portfolio (2) Insurance - 27.48% 178 Allstate Corporation (8) BBB 1/15/23 @ 25 $ 24.940 $ 4,439.32 5.100% Due 01/15/2053 + 165 Arch Capital Group, Ltd. - Series E Baa3# 9/29/21 @ 25 22.500 3,712.50 5.250% + 192 Axis Capital Holdings, Ltd. - Series E BBB 11/7/21 @ 25 23.220 4,458.24 5.500% + 116 Enstar Group, Ltd. - Series D (8) BB+ 9/1/28 @ 25 25.630 2,973.08 7.000% 113 Hartford Financial Services Group, Inc. - Series G BBB- 11/15/23 @ 25 26.300 2,971.90 6.000% 178 MetLife, Inc. - Series E Baa2# 6/15/23 @ 25 25.000 4,450.00 5.625% 179 Prudential Financial, Inc. BBB+ 8/15/23 @ 25 24.990 4,473.21 5.625% Due 08/15/2058 145 Reinsurance Group of America, Inc. (8) BBB+ 6/15/26 @ 25 25.560 3,706.20 5.750% Due 06/15/2056 + 123 RenaissanceRe Holdings, Ltd. - Series F BBB 6/30/23 @ 25 24.190 2,975.37 5.750% 113 Torchmark Corporation (8) BBB+ 6/15/21 @ 25 26.500 2,994.50 6.125% Due 06/15/2056 147 W.R. Berkley Corporation BBB- 6/1/21 @ 25 25.310 3,720.57 5.750% Due 06/01/2056 REITs - 7.98% 123 American Homes 4 Rent BB 5/24/21 @ 25 24.050 2,958.15 6.500% 127 Digital Realty Trust, Inc. - Series J BB+ 8/7/22 @ 25 23.240 2,951.48 5.250% 133 PS Business Parks, Inc. - Series X BBB 9/21/22 @ 25 22.360 2,973.88 5.250% 128 Public Storage - Series F BBB+ 6/2/22 @ 25 23.270 2,978.56 5.150% Telecommunication - 4.01% 239 AT&T, Inc. BBB 8/1/23 @ 25 24.950 5,963.05 5.625% Due 08/01/2067 5,918 $ 148,718.70 See Notes to Portfolios. 13

Multi-Asset High Income Portfolio Investment Objective. The Portfolio seeks to provide current income and the potential for capital appreciation. Principal Investment Strategy. The Portfolio seeks to achieve its objective by investing in an income-oriented portfolio consisting of common stocks, real estate investment trusts ( REITs ), preferred securities, master limited partnerships ( MLPs ), and common stocks of closed-end investment companies (known as closed-end funds ). Invesco Capital Markets, Inc., the Sponsor, has identified these asset classes within the market that typically distribute aboveaverage levels of income and also have the potential to participate in rising markets. In determining the asset classes to include in the portfolio, the Sponsor conducted research on both near-term and longer-term correlations, income levels, performance and volatility to include specific asset classes that may provide the potential for correlation and volatility advantages over investing in a single asset class or sector of the market. The Sponsor seeks to divide the Portfolio s exposure through a balanced allocation among five asset classes that will include dividend-paying equities, REITs, preferred securities, MLPs, and closed-end funds. Within the various asset classes, the Sponsor assembled the final portfolio based on a consideration of factors including, but not limited to: Dividend-Paying Equities: Companies were selected based on factors such as dividend yield, dividend growth, valuations, earnings and sales growth, and cash flow generation. REITs: Securities were selected based on factors such as dividend yield, valuations, growth potential, and volatility. Preferred Securities: Securities were selected based on factors such as current yield, credit ratings, industry and issuer trends, and fundamentals. MLPs: Securities were selected based on factors such as valuations, distribution sustainability, and overall volatility and risk characteristics. Closed-end funds: Closed-end funds were selected based on factors such as income opportunity, management team and performance, valuation (premium/discount to net asset value), diversification, and liquidity. In addition, as indicated by information publicly available at the time of selection, none of the Portfolio s closedend funds employed structural leverage. Structural leverage affects a closed-end fund s capital structure by increasing the fund s portfolio assets, and is generally achieved through a fund s issuance of preferred shares or debt securities, or through borrowing money. Approximately 2% of the Portfolio consists of funds that are classified as non-diversified under the Investment Company Act of 1940. These funds have the ability to invest a greater portion of their assets in obligations of a single issuer. As a result, these funds may be more susceptible to volatility than a more widely diversified fund. Of course, we cannot guarantee that your Portfolio will achieve its objective. The value of your Units may fall below the price you paid for the Units. You should read the Risk Factors section before you invest. The Portfolio is designed as part of a long-term investment strategy. The Sponsor may offer a subsequent series of the portfolio when the current Portfolio terminates. As a result, you may achieve more consistent overall results by following the strategy through reinvestment of your proceeds over several years if subsequent series are available. Repeatedly rolling over an investment in a unit investment trust may differ from long-term investments in other investment products when considering the sales charges, fees, expenses and tax consequences attributable to a Unitholder. For more information see Rights of Unitholders--Rollover. 14

Principal Risks. As with all investments, you can lose money by investing in this Portfolio. The Portfolio also might not perform as well as you expect. This can happen for reasons such as these: Security prices will fluctuate. The value of your investment may fall over time. A security issuer may be unable to issue distributions, or to make payments of interest, dividends or principal in the future. This may reduce the level of income certain of the Portfolio s securities pay which would reduce your income and may cause the value of your Units to fall. The financial condition of a security issuer may worsen or its credit ratings may drop, resulting in a reduction in the value of your Units. This may occur at any point in time, including during the initial offering period. You could experience dilution of your investment if the size of the Portfolio is increased as Units are sold. There is no assurance that your investment will maintain its proportionate share in the Portfolio s profits and losses. The Portfolio invests significantly in stocks of large cap companies. Large cap companies are more mature and may grow more slowly than the economy as a whole and tend to go in and out of favor based on market and economic conditions. The Portfolio invests in preferred securities. Preferred securities are typically subordinated to bonds and other debt instruments in a company s capital structure in terms of priority to corporate income and therefore are subject to greater risk than those debt instruments. Preferred securities are subject to interest rate risk, meaning that their values may fall if interest rates, in general, rise. Given the historically low interest rate environment in the U.S., risks associated with rising rates are heightened. The negative impact on fixed income securities from any interest rate increases could be swift and significant. In addition to the other risks described herein, income payments on certain preferred securities may be deferred, which may reduce the amount of income you receive on your Units. The Portfolio invests in MLPs. Most MLPs operate in the energy sector and are subject to the risks generally applicable to companies in that sector, including commodity pricing risk, supply and demand risk, depletion risk and exploration risk. MLPs are also subject to the risk that regulatory or legislative changes could limit or eliminate the tax benefits enjoyed by MLPs which could have a negative impact on the after-tax income available for distribution by the MLPs and/or the value of the Portfolio s investments. The Portfolio invests in shares of closed-end funds. You should understand the section titled Closed-End Funds before you invest. In particular, shares of closed-end funds tend to trade at a discount from their net asset value and are subject to risks related to factors such as management s ability to achieve a fund s objective, market conditions affecting a fund s investments and use of leverage, if any. The underlying funds have management and operating expenses. You will bear not only your share of the Portfolio s expenses, but also the expenses of the underlying funds. By investing in other funds, the Portfolio incurs greater expenses than you would incur if you invested directly in the funds. Certain securities in the Portfolio, as well as certain of the securities held by the underlying funds in the Portfolio, may be rated below investment grade and considered to be junk or high-yield 15

securities. Securities rated below BBB- by Standard & Poor s or Fitch Ratings or below Baa3 by Moody s are considered to be below investment grade. These securities are considered to be speculative and are subject to greater market and credit risks. Accordingly, the risk of default is higher than with investment grade securities. In addition, these securities may be more sensitive to interest rate changes and may be more likely to make early returns of principal. The Portfolio invests in shares of REITs and other real estate companies. Shares of REITs and other real estate companies may appreciate or depreciate in value, or pay dividends depending upon global and local economic conditions, changes in interest rates and the strength or weakness of the overall real estate market. Negative developments in the real estate industry will affect the value of your investment more than would be the case in a more diversified investment. We do not actively manage the Portfolio. Except in limited circumstances, the Portfolio will hold, and may continue to buy, shares of the same securities even if their market value declines. 16

Fee Table The amounts below are estimates of the direct and indirect expenses that you may incur based on a $10 Public Offering Price per Unit. Actual expenses may vary. As a % of Public Amount Offering Per 100 Sales Charge Price Units Initial sales charge 0.000% $ 0.000 Deferred sales charge 1.350 13.500 Creation and development fee 0.500 5.000 Maximum sales charge 1.850% $18.500 As a % Amount of Net Per 100 Assets Units Estimated Organization Costs 0.556% $5.426 Estimated Annual Expenses Trustee s fee and operating expenses 0.270% $2.633 Supervisory fee, bookkeeping and administrative fees 0.056 0.550 Underlying fund expenses 0.221 2.162 Total 0.547% $5.345* Example This example helps you compare the cost of the Portfolio with other unit trusts and mutual funds. In the example we assume that the expenses do not change and that the Portfolio s annual return is 5%. Your actual returns and expenses will vary. This example also assumes that you continue to follow the Portfolio strategy and roll your investment, including all distributions, into a new trust each year subject to a sales charge of 1.85%. Based on these assumptions, you would pay the following expenses for every $10,000 you invest in the Portfolio: 1 year $ 293 3 years 895 5 years 1,521 10 years 3,195 * The estimated annual expenses are based upon the estimated trust size for the Portfolio determined as of the initial date of deposit. Because certain of the operating expenses are fixed amounts, if the Portfolio does not reach the estimated size, or if the value of the Portfolio or number of outstanding units decline over the life of the trust, or if the actual amount of the operating expenses exceeds the estimated amounts, the actual amount of the operating expenses per 100 units would exceed the estimated amounts. In some cases, the actual amount of operating expenses may substantially differ from the amounts reflected above. The maximum sales charge is 1.85% of the Public Offering Price per 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, the initial sales charge is the difference between the total sales charge (maximum of 1.85% of the Public Offering Price) and the sum of the remaining deferred sales charge and the creation and development fee. The deferred sales charge is fixed at $0.135 per Unit and accrues daily from June 10, 2019 through November 9, 2019. Your Portfolio pays a proportionate amount of this charge on the 10th day of each month beginning in the accrual period until paid in full. The combination of the initial and deferred sales charges comprises the transactional sales charge. The creation and development fee is fixed at $0.05 per Unit and is paid at the earlier of the end of the initial offering period (anticipated to be three months) or six months following the Initial Date of Deposit. For more detail, see Public Offering Price -- General. Although not an actual operating expense, the Portfolio, and therefore the Unitholders, will indirectly bear the operating expenses of the funds held by the Portfolio in the estimated amount provided above. Estimated fund expenses are based upon the net asset value of the number of fund shares held by the Portfolio per Unit multiplied by the annual operating expenses of the funds for the most recent fiscal year. The Trustee or Sponsor will waive fees otherwise payable by the Portfolio in an amount equal to any 12b-1 fees or other compensation the Trustee, the Sponsor or an affiliate receives from the funds in connection with the Portfolio s investment in the funds, including license fees receivable by an affiliate of the Sponsor from a fund. Essential Information Unit Price at Initial Date of Deposit $10.0000 Initial Date of Deposit February 6, 2019 Mandatory Termination Date May 20, 2020 Historical Annual Distributions 1 $0.58428 per Unit Record Dates 10th day of March 2019 and each month thereafter Distribution Dates 25th day of March 2019 and each month thereafter CUSIP Numbers Cash 46143A660 Reinvest 46143A678 Fee Based Cash 46143A686 Fee Based Reinvest 46143A694 1 As of close of business day prior to Initial Date of Deposit. The actual distributions you receive will vary from this per Unit amount due to changes in the Portfolio s fees and expenses, in actual income received by the Portfolio, currency fluctuations and with changes in the Portfolio such as the acquisition or liquidation of securities. See Rights of Unitholders--Historical and Estimated Distributions. 17

Multi-Asset High Income Portfolio 2019-1 Portfolio Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) COMMON STOCKS - 19.86% Communication Services - 1.98% 40 Comcast Corporation - CL A $ 37.150 2.26% $ 1,486.00 27 Verizon Communications, Inc. 54.140 4.45 1,461.78 Consumer Discretionary - 2.94% 8 Home Depot, Inc. 186.390 2.21 1,491.12 8 McDonald's Corporation 177.570 2.61 1,420.56 20 Target Corporation 72.770 3.52 1,455.40 Consumer Staples - 0.99% 30 Coca-Cola Company 49.260 3.17 1,477.80 Energy - 0.96% 12 Chevron Corporation 119.480 3.98 1,433.76 Financials - 3.10% 4 BlackRock, Inc. 417.560 3.16 1,670.24 14 JPMorgan Chase & Company 103.790 3.08 1,453.06 35 Morgan Stanley 42.450 2.83 1,485.75 Health Care - 2.98% 11 Johnson & Johnson 132.880 2.71 1,461.68 + 17 Medtronic plc 88.030 2.27 1,496.51 35 Pfizer, Inc. 42.110 3.42 1,473.85 Industrials - 2.00% 22 Emerson Electric Company 66.900 2.93 1,471.80 5 Lockheed Martin Corporation 299.460 2.94 1,497.30 Information Technology - 2.92% 5 Broadcom, Inc. 270.000 3.93 1,350.00 31 Cisco Systems, Inc. 47.260 2.79 1,465.06 15 Texas Instruments, Inc. 102.320 3.01 1,534.80 Utilities - 1.99% 19 American Electric Power Company, Inc. 79.010 3.39 1,501.19 31 Exelon Corporation 47.290 2.92 1,465.99 MASTER LIMITED PARTNERSHIPS - 20.02% 219 Antero Midstream GP, L.P. 13.760 4.77 3,013.44 91 Crestwood Equity Partners, L.P. (4) 32.730 7.33 2,978.43 197 Energy Transfer, L.P. (4) 15.100 8.08 2,974.70 104 Enterprise Products Partners, L.P. (4) 28.580 6.09 2,972.32 65 EQT Midstream Partners, L.P. (4) 45.800 9.87 2,977.00 50 Magellan Midstream Partners, L.P. (4) 60.160 6.63 3,008.00 85 MPLX, L.P. (4) 35.200 7.36 2,992.00 59 Phillips 66 Partners, L.P. (4) 50.500 6.61 2,979.50 129 Plains All American Pipeline, L.P. (4) 22.890 5.24 2,952.81 90 Western Gas Equity Partners, L.P. (4) 32.700 7.37 2,943.00 18

Multi-Asset High Income Portfolio 2019-1 Portfolio (continued) Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) REAL ESTATE INVESTMENT TRUSTS - 20.06% Mortgage REITs - 10.02% 162 Apollo Commercial Real Estate Finance, Inc. $ 18.400 10.00% $ 2,980.80 86 Blackstone Mortgage Trust, Inc. - CL A 34.600 7.17 2,975.60 155 Chimera Investment Corporation 19.170 10.43 2,971.35 175 New Residential Investment Corporation 17.060 11.72 2,985.50 135 Starwood Property Trust, Inc. 22.170 8.66 2,992.95 REITs - 10.04% 66 American Campus Communities, Inc. 45.770 4.02 3,020.82 25 Crown Castle International Corporation 119.220 3.77 2,980.50 96 HCP, Inc. 31.330 4.72 3,007.68 43 Realty Income Corporation 69.320 3.85 2,980.76 16 Simon Property Group, Inc. 184.000 4.46 2,944.00 CLOSED-END FUNDS - 20.04% Covered Call - 5.99% 339 Eaton Vance Risk-Managed Diversified Equity Income Fund 8.730 10.45 2,959.47 230 Nuveen S&P 500 Buy-Write Income Fund 12.970 7.56 2,983.10 290 Voya Global Advantage and Premium Opportunity Fund 10.220 8.81 2,963.80 Emerging Market Equity - 2.04% 370 Voya Emerging Markets High Income Dividend Equity Fund 8.180 9.05 3,026.60 Global Equity - 2.01% 206 John Hancock Hedged Equity & Income Fund 14.550 10.34 2,997.30 Real Estate - 2.02% 235 Cohen & Steers Total Return Realty Fund, Inc. 12.800 7.50 3,008.00 Sector Equity - 3.98% 141 Tekla Healthcare Investors 21.050 9.69 2,968.05 168 Tekla Life Sciences Investors 17.590 9.55 2,955.12 U.S. Equity - 4.00% 498 Liberty All Star Equity Fund 5.970 10.05 2,973.06 222 Nuveen Core Equity Alpha Fund 13.410 8.28 2,977.02 19