Stock Taper
| DATE | TYPE | RATIO |
|---|---|---|
| 2026-09-11 | Reverse | 1:80 |
Gossamer Bio, Inc. is a San Diego-based clinical-stage biopharmaceutical company developing therapeutics in immunology, inflammation, and oncology, including inhaled and oral small molecules for pulmonary hypertension, IBD, CNS lymphoma, and multi...

Seralutinib, Gossamer Bio's lead Phase 3 inhaled drug, is being developed to treat pulmonary arterial hypertension and pulmonary hypertension associated with interstitial lung disease.
In September 2025, Gossamer Bio's stock experienced a significant increase, with reports of a surge up to 17.7%. This movement was largely attributed to an analyst upgrade from UBS on September 10, 2025, which changed the stock's rating from "Neutral" to "Buy" and dramatically raised the price target to $9. This upgrade, coupled with the company's presentations at several investor conferences during the month, generated considerable positive investor interest and media attention.
Gossamer Bio entered into a strategic option agreement to acquire Respira Therapeutics and its lead product candidate, RT234, an inhaled, as-needed treatment for pulmonary hypertension. This move is designed to complement Gossamer's lead asset, seralutinib, and build a comprehensive commercial portfolio for patients with pulmonary hypertension.
Overall rating: C+
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