Gossamer Bio Announces Effectiveness of 1-for-80 Reverse Stock Split
Gossamer Bio, Inc. (GOSS) filed an SEC Form 8-K — Other Events. Exhibit 99.1 Gossamer Bio Announces Effectiveness of 1-for-80 Reverse Stock Split September 11, 2026 SAN DIEGO—(BUSINESS WIRE)— September 11, 2026 — Gossamer Bio, Inc. (Nasdaq: GOSS) (the “Company” or “Gossamer”), a clinical-stage biopharmaceutical company focused on the developm
How this was made
The 30-second read
Why it matters
The split will adjust share counts and may improve liquidity, but compliance is not guaranteed.
Market read
Primary corporate action for a listed biotech; relevant for traders monitoring Nasdaq compliance moves.
What to watch
Potential dilution from warrant adjustments and convertible note conversions could offset price gains.
Background
Gossamer Bio is a clinical‑stage biotech developing seralutinib for pulmonary hypertension. The reverse split aims to meet Nasdaq's $1 minimum bid price rule.
Ticker impact
Company filed a 1-for-80 reverse stock split to regain Nasdaq minimum bid price compliance.
Short-term upward pressure as shares trade split-adjusted; long-term impact depends on compliance success.
The split is a concrete corporate action with immediate trading effect; however, price sustainability is uncertain.
Market effects
May prompt other low‑price biotech stocks to consider similar splits to avoid delisting.
Limited to US Nasdaq biotech listings.
Minimal global impact; primarily a US‑focused compliance move.
Counterpoint
If the split fails to sustain price, the stock could fall sharply post‑split.
Key entities
- companyGossamer Bio, Inc.
Issuer of the reverse stock split.
- service_providerComputershare Trust Company, N.A.
Transfer and exchange agent handling the split.
