Insiders who have reported open-market trades at the same companies as Bryan Giraudo. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Sandra Milligan - $50K in GOSS purchases and sales on record
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Bryan Giraudo is a corporate insider, tracked as COO/CFO of Gossamer Bio, Inc. (GOSS). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Bryan Giraudo submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Bryan Giraudo been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($5.92M) across all tracked filings.
Bryan Giraudo is COO/CFO of Gossamer Bio, Inc. (GOSS). 4 SEC Form 4 filings on record going back to 2025, most recently on 26 August 2026. Most recent open-market trade: sold $513K of PTGX on 12 May 2026. Lifetime open-market sales: $5.92M.
Recent transactions
7
The latest 7 SEC Form 4 transactions reported by Bryan Giraudo.
InsiderAlpha's records for Bryan Giraudo go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
