Gossamer Bio, Inc. Layoff — May 2026
SOURCEOFFICIAL FILINGCalifornia Employment Development Department· filed March 16, 2026View the filing ↗
What we know
Location: San Diego, CA (San Diego County).
A WARN notice for this layoff is recorded on March 16, 2026.
Disclosed through an official WARN filing with the CA state workforce agency.
Summary
Gossamer Bio announced a reduction in force after its Phase 3 trial for seralutinib failed to meet its prespecified statistical threshold. The company confirmed to KRON4 that 77 employees were laid off on Monday, representing roughly a 48% reduction in its overall workforce. The cuts were described as cost-saving measures to preserve cash while the company determines next regulatory steps for the investigational PAH drug. Severance packages were provided, though details were not disclosed. Gossamer is headquartered in San Diego and also maintains an office in Dublin, Ireland; the layoffs followed the February announcement of disappointing trial results and a steep drop in the company’s stock.
Gossamer Bio, Inc. disclosed this layoff in an official WARN (Worker Adjustment and Retraining Notification) notice recorded by the CA state workforce agency on March 16, 2026. The notice covers 65 employees in San Diego, CA (San Diego County), with the layoff effective May 15, 2026.
That is roughly 75.6% of the 86 people Gossamer Bio, Inc. employs.
LayoffTalk has tracked 2 layoff events at Gossamer Bio, Inc. since March 2026, including 65 jobs documented in official WARN filings, with 1 additional event known from news reporting.
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