Sutro Biopharma Announces Pricing of $110.0 million Underwritten Offering

On February 10, 2026 Sutro Biopharma, Inc. (Sutro or the Company) (Nasdaq: STRO), a clinical-stage oncology company pioneering site-specific and novel-format antibody drug conjugates (ADCs), reported the pricing of an underwritten offering of 7,868,383 shares of its common stock at a price of $13.98 per share. The gross proceeds from this offering are expected to be approximately $110.0 million, before deducting underwriting discounts and commissions and other offering expenses payable by Sutro. All of the shares of common stock are being offered by Sutro. The offering is expected to close on or about February 11, 2026, subject to the satisfaction of customary closing conditions.

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The offering includes participation from new and existing investors, including BVF Partners L.P., Samsara BioCapital, Coastlands Capital, Eventide Asset Management, Perceptive Advisors, RA Capital Management, ADAR1 Capital Management, Affinity Asset Advisors and Acuta Capital Partners.

Leerink Partners, TD Cowen and LifeSci Capital are acting as joint bookrunning managers for the proposed offering.

Sutro intends to use the net proceeds of this offering, together with its existing cash, cash equivalents and marketable securities, primarily for general corporate purposes, which may include funding research, clinical and process development and manufacturing of its product candidates, increasing its working capital, acquisitions or investments in businesses, products or technologies that are complementary to the Company, capital expenditures and other general corporate purposes.

The securities are being offered by Sutro pursuant to a registration statement on Form S-3 previously filed and declared effective by the Securities and Exchange Commission (SEC). A prospectus supplement and accompanying prospectus relating to this offering will be filed with the SEC. Copies of the prospectus supplement and the accompanying prospectus relating to this offering, may also be obtained, when available, from: Leerink Partners LLC, Attention: Syndicate Department, 53 State Street, 40th Floor, Boston, MA 02109, by telephone at (800) 808-7525, ext. 6105, or by email at [email protected]; TD Securities (USA) LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by email at [email protected]; or LifeSci Capital LLC, 1700 Broadway, 40th Floor, New York, NY 10019, or by email at [email protected] Electronic copies of the prospectus supplement and accompanying prospectus will also be available on the website of the SEC at View Source

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities of Sutro, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

(Press release, Sutro Biopharma, FEB 10, 2026, View Source [SID1234662574])