Recent Updates — GOSS

Gossamer Bio, Inc. stockholders approved the potential issuance of common stock pursuant to a Securities Purchase Agreement dated August 20, 2026. The approval covers shares issuable upon exercise of Pre-Funded Warrants and FDA Approval Warrants, as well as conversion of Series A-1, A-2, and A-3 Preferred Stock. These issuances would exceed 20% of the outstanding common stock prior to closing, requiring shareholder consent under Nasdaq Listing Rules 5635(c) and 5635(d). The proposal passed with 2,808,000 votes in favor against 37,814. Gossamer Bio operates as a clinical-stage biotechnology company focused on developing treatments for autoimmune diseases.

Gossamer Bio, Inc. received a letter from Nasdaq confirming it has regained compliance with the minimum bid price requirement for continued listing on the Nasdaq Global Select Market. This resolves the non-compliance notice issued on April 8, 2026, which cited a failure to maintain a $1.00 minimum bid price for 30 consecutive business days. The company previously executed a 1-for-80 reverse stock split effective September 10, 2026, with adjusted trading beginning September 11, 2026. Gossamer Bio operates in the biotechnology industry, focusing on the discovery and development of therapies for cancer and inflammatory diseases.

Gossamer Bio appointed Gregory A. Ciongoli as a Class III director effective September 16, 2026, with his term expiring at the 2027 annual meeting. Mr. Ciongoli also joined the Audit Committee and receives an annual cash retainer of $40,000 for board service plus $7,500 for audit committee membership. He is a founder and managing partner of Adiumentum Capital Management and previously served as a partner at Baupost Group. The appointment follows his participation in the company's August 2026 private placement PIPE transaction, where he purchased pre-funded warrants exercisable for approximately 144,024 shares of common stock post-split. Gossamer Bio is a clinical-stage biopharmaceutical company focused on developing seralutinib for pulmonary arterial hypertension and related conditions.

Gossamer Bio, Inc. filed a Certificate of Amendment to its Charter on September 10, 2026, effecting a 1-for-80 reverse stock split of its common stock and reducing authorized shares from 4 billion to 50 million. The transaction became effective at 11:59 p.m. Eastern Time on September 10, 2026, with split-adjusted trading commencing on the Nasdaq Global Select Market on September 11, 2026. Fractional shares are rounded up to the nearest whole share rather than being cashed out. Convertible notes and warrants were proportionately adjusted to reflect the new ratio. The company states this action is intended to help regain compliance with Nasdaq's minimum bid price requirement by October 5, 2026. Gossamer Bio operates in the biopharmaceutical industry, developing treatments for pulmonary hypertension.

Gossamer Bio announced that its board selected a 1-for-80 reverse stock split ratio for its common stock. The transaction is expected to become effective on September 10, 2026, at 11:59 p.m. Eastern Time, with split-adjusted trading beginning on the Nasdaq Global Select Market on September 11, 2026. This action aims to regain compliance with Nasdaq's minimum bid price requirement. Concurrently, authorized common shares will decrease from 4 billion to 50 million, and total authorized capital stock will reduce from 4.07 billion to 120 million. Fractional shares will be rounded up to the nearest whole share rather than paid in cash. The company is a clinical-stage biopharmaceutical firm developing seralutinib for pulmonary arterial hypertension.

Gossamer Bio filed a Certificate of Designation to establish Series A-1 Convertible Preferred Stock in connection with the closing of a previously announced private placement. This action amends the company's certificate of incorporation to define the preferences, rights, and limitations of this new equity class. Gossamer Bio operates as a clinical-stage biotechnology company focused on developing treatments for autoimmune diseases.