• Gossamer Bio effected a 1-for-80 reverse stock split, effective 11:59 p.m. ET on Sept. 10, 2026.
• Shares begin trading on a split-adjusted basis on Nasdaq at the Sept. 11, 2026 open under GOSS.
• Authorized common shares cut to 50 million from 4 billion; total authorized capital stock reduced to 120 million from 4.07 billion.
• Outstanding convertible notes, warrants, prefunded warrants, equity awards, and plan share reserves were proportionately adjusted for the split ratio.
• Move targets Nasdaq’s $1 minimum bid requirement; compliance deadline set for Oct. 5, 2026.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Gossamer Bio Inc. published the original content used to generate this news brief via Business Wire (Ref. ID: 20260911232470) on September 11, 2026, and is solely responsible for the information contained therein.