🔴 Gossamer Bio is trading 5.55% down today after a 1-for-80 reverse stock split

Gossamer Bio is trading at $10.76, down 5.55%, after its 1-for-80 reverse stock split became effective at 11:59 p.m. ET on September 10, 2026.

• Every 80 shares were combined into one share; split-adjusted trading began September 11, 2026.
• The action was intended to restore Nasdaq’s minimum bid-price compliance and is primarily a capital-structure adjustment, not an equivalent 80-fold economic loss for shareholders.
• Authorized common shares fell from 4 billion to 50 million.