X0202 SCHEDULE 13G/A 0001493152-26-032060 0001328329 XXXXXXXX LIVE 3 Common Stock 08/14/2026 0001213809 DYADIC INTERNATIONAL INC 26745T101 1044 North U.S. Highway One, Suite 201, Jupiter FL 33477 Rule 13d-1(c) Francisco Trust under agreement dated February 28, 1996 IL 4232653.00 0.00 4232653.00 0.00 4232653.00 N 10.32 OO The number of shares beneficially owned represents (i) 3,280,272 shares of common stock held by the reporting person, and (ii) 952,381 shares of common stock the reporting person has the right to acquire upon conversion of a convertible promissory note issued on March 8, 2024 by the issuer to the reporting person, as such note has been amended. Such note, as amended, is convertible at a per share price of $1.05. All percentages in this Schedule 13G/A, calculated in accordance with applicable rules of the Securities and Exchange Commission (the "SEC"), are based upon an aggregate of 40,063,703 shares outstanding of the issuer's common stock on August 14, 2026, as disclosed in the issuer's prospectus supplement filed with the SEC on August 13, 2026. DYADIC INTERNATIONAL INC 1044 North U.S. Highway One, Suite 201, Jupiter, Florida, 33477 Francisco Trust under agreement dated February 28, 1996 606 Dauphine Avenue, Northbrook, IL 60062 Florida Y 4,232,653.00 10.32 % 4,232,653.00 0 4,232,653.00 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Francisco Trust under agreement dated February 28, 1996 /s/ Thomas Emalfarb 08/17/2026