Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.
On and effective as of September 3, 2026, the Board of Directors (the "Board") of Gossamer Bio, Inc. (the "Company") approved the amendment and restatement of the amended and restated bylaws of the Company (as so amended and restated, the "Amended and Restated Bylaws") to reduce the requisite quorum at all meetings of stockholders for the transaction of business from the holders of a majority to the holders of one third (1/3) in voting power of the Company's capital stock issued and outstanding and entitled to vote, present in person, or by remote communication, if applicable, or represented by proxy, unless otherwise required by applicable law, the Company's certificate of incorporation or the Amended and Restated Bylaws.
The foregoing description of the Amended and Restated Bylaws is qualified in its entirety by reference to the full text of the Amended and Restated Bylaws, a copy of which is attached as Exhibit 3.1 to this Current Report on Form 8-K and incorporated herein by reference.