0001659617 2026-03-27 2026-03-27 0001659617 1 2026-03-27 2026-03-27 0001659617 1 2026-03-27 2026-03-27 0001659617 2 2026-03-27 2026-03-27 iso4217:USD pure shares S-3 S-3 EX-FILING FEES 0001659617 Moleculin Biotech, Inc. N/A true false S-3 Moleculin Biotech, Inc. false Equity Common Stock true 6367956 2.19 13945823.64 0.0001381 1925.92 13945823.64 1925.92 0.00 1925.92 0.00 (1) Pursuant to Rule 416 under the Securities Act, the securities being registered hereunder for the selling stockholders include such indeterminate number of additional shares of common stock as may be issued after the date hereof as a result of stock splits, stock dividends or similar transactions. (2) Estimated solely for the purpose of calculating the registration fee in accordance with Rule 457(c) of the Securities Act of 1933, as amended, based upon the average of the high and low prices for a share of the registrant's common stock as reported on the Nasdaq Capital Market on March 24, 2026. (3) Consists of up to 6,367,956 shares of common stock issuable upon the exercise of warrants held by the selling stockholders named in the prospectus. true Moleculin Biotech, Inc. S-1 333-283820 2024-12-13 1925.92 Equity Common Stock 0 24500000.00 true Moleculin Biotech, Inc. S-1 333-283820 2024-12-13 1925.92 The registrant paid a registration fee of $3,750.95 in connection with the registration of securities pursuant to a registration statement on Form S-1 (File No. 333-283820), which was initially filed with the SEC on December 13, 2025 (the "Prior Registration Statement"). The Prior Registration Statement was not declared effective by the SEC, and no securities were issued or sold thereunder. The Prior Registration Statement was withdrawn by filing a Form RW on February 24, 2025. In accordance with Rule 457(p) under the Securities Act, the total amount of the registration fee due upon the initial filing of this Registration Statement is offset by $1,925.92 of the $3,750.95.