On June 8, 2023, Gossamer Bio, Inc. (the “Company”) held its 2023 Annual Meeting of Stockholders (the “Annual Meeting”). At the Annual Meeting, as described below under Item 5.07, the stockholders of the Company approved an amendment to the Company’s Amended and Restated Certificate of Incorporation, to eliminate the personal liability of the Company’s officers for monetary damages for breach of fiduciary duty as an officer, except to the extent such an exemption from liability or limitation thereof is not permitted by Delaware General Corporation Law (the “Amendment”). The Amendment became effective upon the Company’s filing of a Certificate of Amendment to the Amended and Restated Certificate of Incorporation with the Secretary of State of Delaware on June 8, 2023 (“Certificate of Amendment”).