Updated Jul 16, 2026
Giraudo Bryan has filed 1 SEC Form 4 filing across 1 company in the last 90 days — selling. Lifetime open-market sales: $5.92M.

Bryan Giraudo is the Chief Operating Officer and Chief Financial Officer at Gossamer Bio, Inc., a clinical-stage biopharmaceutical company focused on developing therapeutics for immunology, inflammation, and oncology. He has been involved in the company's operations and financial management, contributing to its growth and strategic direction.
| Role | Director |
|---|---|
| Notability | 30/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-12 | PTGX | Protagonist Therapeutics, Inc | S — Open-market sale | 5.1K | $100.00 | $513K |
| 2026-05-12 | PTGX | Protagonist Therapeutics, Inc | S — Open-market sale | 6.0K | $100.00 | $600K |
| 2026-05-12 | PTGX | Protagonist Therapeutics, Inc | S — Open-market sale | 12.0K | $100.07 | $1.20M |
| 2026-05-12 | PTGX | Protagonist Therapeutics, Inc | S — Open-market sale | 36.0K | $100.14 | $3.61M |
| 2026-05-12 | PTGX | Protagonist Therapeutics, Inc | M — Option exercise | 12.0K | $6.98 | $84K |
| 2026-05-12 | PTGX | Protagonist Therapeutics, Inc | M — Option exercise | 24.0K | $6.45 | $155K |
| 2025-10-01 | GOSS | Gossamer Bio, Inc. | A — Grant or award | 181.2K | $0.00 |
Bryan Giraudo is the Chief Operating Officer and Chief Financial Officer at Gossamer Bio, Inc., a clinical-stage biopharmaceutical company focused on developing therapeutics for immunology, inflammation, and oncology. He has been involved in the company's operations and financial management, contributing to its growth and strategic direction.…
1 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 4 open-market sales ($5.92M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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