Gossamer Bio Amends Bylaws to Lower Shareholder Quorum to 1/3

What Happened
Gossamer Bio, Inc. (GOSS) filed a Form 8-K on September 3, 2026, reporting that its Board approved an amendment and restatement of the company's bylaws. The amendment reduces the required quorum for stockholder meetings from a majority to one-third (1/3) of the outstanding voting power entitled to vote, effective September 3, 2026. The Amended and Restated Bylaws are attached as Exhibit 3.1 to the filing.

Key Details

• Date filed and effective: September 3, 2026.
• Quorum change: from a majority of voting power to one-third (1/3) of voting power present in person, by remote communication, or by proxy.
• Approval: Adopted by the Board of Directors.
• Documentation: Full text of the Amended and Restated Bylaws included as Exhibit 3.1 to the 8-K.

Why It Matters
Lowering the quorum threshold makes it easier for the company to conduct business at shareholder meetings when fewer shares are represented, which can speed decision-making and reduce the likelihood of adjournments due to lack of quorum. For investors, the change affects how many shares must be present to approve routine and certain other corporate actions; it does not itself alter voting rights or corporate governance beyond the quorum requirement.