0001604813 2026-10-21 2026-10-21 0001604813 ck0001604813:S000056835Member 2026-10-21 2026-10-21 0001604813 ck0001604813:S000054995Member 2026-10-21 2026-10-21 0001604813 ck0001604813:S000085700Member 2026-10-21 2026-10-21 0001604813 ck0001604813:S000069939Member 2026-10-21 2026-10-21 0001604813 ck0001604813:S000069940Member 2026-10-21 2026-10-21 0001604813 ck0001604813:S000074479Member 2026-10-21 2026-10-21 0001604813 2025-11-28 2025-11-28 497 Abacus FCF ETF Trust 0001604813 false 2026-10-21 N-1A <div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">SUPPLEMENT DATED OCTOBER 21, 2026</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">TO THE CURRENTLY EFFECTIVE PROSPECTUS</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">OF</span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">ABACUS FCF INTERNATIONAL LEADERS ETF (ABLG)</span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">ABACUS FCF LEADERS ETF (ABFL)</span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">ABACUS FCF SMALL CAP LEADERS ETF (ABLS)</span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">ABACUS FCF INNOVATION LEADERS ETF (ABOT)</span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">ABACUS FLEXIBLE BOND LEADERS ETF (ABXB)</span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">ABACUS FCF REAL ASSETS LEADERS ETF (ABLD)</span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">(each a “Fund” and, collectively, the “Funds”)</span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">Important Notice to Investors</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Capitalized terms used in this supplement, unless otherwise defined in this supplement, have the meanings assigned to them in the Funds' Prospectus.</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The below changes are immediately effective. </span></div><div style="text-align:justify"><span><br/></span></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">1.</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:9.75pt">The third paragraph in the section titled “Fund Summaries – Principal Investment Strategies” in the Prospectus for each of the Abacus FCF International Leaders ETF and Abacus FCF Leaders ETF is replaced in its entirety with the following:</span></div><div style="padding-left:36pt;text-align:justify"><span><br/></span></div><div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Adviser utilizes its proprietary Abacus FCF Leaders Model (the “Model”) to evaluate securities in the investment universe and scores them based on free cash flow (“FCF”) characteristics, including FCF profitability (the level of free cash flow a company generates relative to the size of its assets), FCF yield (free cash flow relative to the company's enterprise value) and FCF growth (the growth in a company's free cash flow over time). These securities are assigned active weights primarily based on their FCF characteristics, with adjustments reflecting the Adviser’s systematic evaluation of company-specific risk in the context of the business cycle. These active weights are integrated with free-float market capitalization weights and rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to companies with strong FCF characteristics.</span></div><div style="padding-left:36pt;text-align:justify"><span><br/></span></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">2.</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:9.75pt">The third and fourth paragraphs in the section titled “Fund Summaries – Principal Investment Strategies” in the Prospectus for the Abacus FCF Small Cap Leaders ETF is replaced in its entirety with the following:</span></div><div style="padding-left:36pt;text-align:justify"><span><br/></span></div><div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Underlying Index utilizes the Adviser’s proprietary Abacus FCF Leaders Model (the “Model”) to evaluate Eligible Securities and scores them based on FCF characteristics, including FCF profitability (the level of free cash flow a company generates relative to the size of its assets), FCF yield (free cash flow relative to the company's enterprise value) and FCF growth (the growth in a company's free cash flow over time). These securities are assigned active weights primarily based on their FCF characteristics. These active weights are integrated with free-float market capitalization weights and rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to companies with strong FCF characteristics. The Underlying Index includes those remaining Eligible </span></div><div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">Securities until one of the following thresholds is met: (1) over 90% of the cumulative weight of the Eligible Securities has been included in the Underlying Index, or (2) the number of included securities reaches 100. The weights of all securities are then rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to small-cap companies with strong FCF characteristics.</span></div><div style="padding-left:72pt;text-align:justify"><span><br/></span></div><div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Underlying Index is rebalanced and reconstituted quarterly. The Fund’s portfolio is generally rebalanced and reconstituted quarterly, in accordance with the Underlying Index.</span></div><div style="padding-right:36pt;text-align:justify"><span><br/></span></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">3.</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%;padding-left:9.75pt">The following information replaces in its entirety the information for Tom MacDonald appearing under the heading “Portfolio Managers” in the Funds’ Prospectus:</span></div><div style="text-align:justify"><span><br/></span></div><div style="margin-bottom:8pt;padding-left:72pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">Tom MacDonald, </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Financial Analyst at ABL Wealth.</span></div><div style="margin-bottom:8pt;padding-left:72pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">Mr. MacDonald joined Abacus Global Management as a Portfolio Analyst, bringing with him a strong foundation in both finance and technology.</span></div><div style="margin-bottom:8pt;padding-left:72pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">Prior to his current role, Mr. MacDonald spent approximately 2 years at Abacus Global Management serving as a Financial Analyst and Software Engineer before transitioning into a Portfolio Analyst role, which he has held for over a year. In these capacities, he contributed to the design and development of proprietary financial software and supported portfolio analysis and management functions.</span></div><div style="margin-bottom:8pt;padding-left:72pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">Mr. MacDonald has passed the CFA Level II examination and is continuing his pursuit of the CFA charter. He holds a degree in Finance with minors in Mathematics and Computer Science from the University of Central Florida.</span></div><div style="margin-bottom:8pt"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">Please keep this supplement with your Prospectus for future reference.</span></div> 2026-10-21 ABACUS FCF INTERNATIONAL LEADERS ETF ABACUS FCF LEADERS ETF ABACUS FCF SMALL CAP LEADERS ETF ABACUS FCF INNOVATION LEADERS ETF ABACUS FLEXIBLE BOND LEADERS ETF ABACUS FCF REAL ASSETS LEADERS ETF Principal Investment Strategies Principal Investment Strategies <div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Adviser utilizes its proprietary Abacus FCF Leaders Model (the “Model”) to evaluate securities in the investment universe and scores them based on free cash flow (“FCF”) characteristics, including FCF profitability (the level of free cash flow a company generates relative to the size of its assets), FCF yield (free cash flow relative to the company's enterprise value) and FCF growth (the growth in a company's free cash flow over time). These securities are assigned active weights primarily based on their FCF characteristics, with adjustments reflecting the Adviser’s systematic evaluation of company-specific risk in the context of the business cycle. These active weights are integrated with free-float market capitalization weights and rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to companies with strong FCF characteristics.</span></div> <div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Adviser utilizes its proprietary Abacus FCF Leaders Model (the “Model”) to evaluate securities in the investment universe and scores them based on free cash flow (“FCF”) characteristics, including FCF profitability (the level of free cash flow a company generates relative to the size of its assets), FCF yield (free cash flow relative to the company's enterprise value) and FCF growth (the growth in a company's free cash flow over time). These securities are assigned active weights primarily based on their FCF characteristics, with adjustments reflecting the Adviser’s systematic evaluation of company-specific risk in the context of the business cycle. These active weights are integrated with free-float market capitalization weights and rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to companies with strong FCF characteristics.</span></div> Principal Investment Strategies <div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Underlying Index utilizes the Adviser’s proprietary Abacus FCF Leaders Model (the “Model”) to evaluate Eligible Securities and scores them based on FCF characteristics, including FCF profitability (the level of free cash flow a company generates relative to the size of its assets), FCF yield (free cash flow relative to the company's enterprise value) and FCF growth (the growth in a company's free cash flow over time). These securities are assigned active weights primarily based on their FCF characteristics. These active weights are integrated with free-float market capitalization weights and rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to companies with strong FCF characteristics. The Underlying Index includes those remaining Eligible </span></div><div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">Securities until one of the following thresholds is met: (1) over 90% of the cumulative weight of the Eligible Securities has been included in the Underlying Index, or (2) the number of included securities reaches 100. The weights of all securities are then rescaled to construct the final portfolio, seeking to ensure high-conviction exposure to small-cap companies with strong FCF characteristics.</span></div><div style="padding-left:72pt;text-align:justify"><span><br/></span></div><div style="padding-left:72pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">The Underlying Index is rebalanced and reconstituted quarterly. The Fund’s portfolio is generally rebalanced and reconstituted quarterly, in accordance with the Underlying Index.</span></div>