0001437749-25-019188 Sample Contracts

SERIES E COMMON STOCK PURCHASE WARRANT MOLECULIN BIOTECH, INC.
Warrant Agreement • June 2nd, 2025 • Moleculin Biotech, Inc. • Pharmaceutical preparations • New York

THIS SERIES E COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, [_____________] or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the [Stockholder Approval Date]1 (the “Initial Exercise Date”) and on or prior to 5:00 p.m. (New York City time) on the five (5) year anniversary of the Initial Exercise Date, (the “Termination Date”) but not thereafter, to subscribe for and purchase from Moleculin Biotech, Inc., a Delaware corporation (the “Company”), up to [______] shares of Common Stock (as subject to adjustment hereunder, the “Warrant Shares”). The purchase price of one share of Common Stock under this Warrant shall be equal to the Exercise Price, as defined in Section 2(b).

PREFUNDED COMMON STOCK PURCHASE WARRANT MOLECULIN BIOTECH, INC.
Prefunded Common Stock Purchase Warrant • June 2nd, 2025 • Moleculin Biotech, Inc. • Pharmaceutical preparations • New York

THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, [_____________] or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the date hereof (the “Initial Exercise Date”) and until this Warrant is exercised in full (the “Termination Date”) but not thereafter, to subscribe for and purchase from Moleculin Biotech, Inc., a Delaware corporation (the “Company”), up to [______] shares of Common Stock (as subject to adjustment hereunder, the “Warrant Shares”). The purchase price of one share of Common Stock under this Warrant shall be equal to the Exercise Price, as defined in Section 2(b).

SECURITIES PURCHASE AGREEMENT
Securities Purchase Agreement • June 2nd, 2025 • Moleculin Biotech, Inc. • Pharmaceutical preparations • New York

This Securities Purchase Agreement (this “Agreement”) is dated as of [______], 2025, between Moleculin Biotech, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”).

PLACEMENT AGENCY AGREEMENT
Placement Agency Agreement • June 2nd, 2025 • Moleculin Biotech, Inc. • Pharmaceutical preparations • New York