Gossamer Bio, Inc (GOSS) insider trading
Every open-market stock purchase and sale by Gossamer Bio, Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- No open-market insider trades in the last 12 months.
- Last insider buy: Sandra Milligan (Director), $50K, 14 months ago.
Last 12 months: insiders bought $0 (0 buys) and sold $0 (0 sales). Last close $9.79 on Oct 21, 2026.
Recent GOSS insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Sep 23, 2026 | Sandra Milligan (Director) | Bought (not open market) | — |
| Sep 23, 2026 | Thomas O Daniel (Director) | Bought (not open market) | — |
| Sep 23, 2026 | Russell J. Cox (Director) | Bought (not open market) | — |
| Sep 23, 2026 | Skye Drynan (Director) | Bought (not open market) | — |
| Sep 23, 2026 | John D Quisel (Director) | Bought (not open market) | — |
| Sep 23, 2026 | Gregory Austin Ciongoli (Director) | Bought (not open market) | — |
| Sep 23, 2026 | Steven D Nathan (Director) | Bought (not open market) | — |
| Aug 24, 2026 | Faheem Hasnain (CEO) | Bought (not open market) | $166K |
| Aug 24, 2026 | Bryan Giraudo (CFO) | Bought (not open market) | $25K |
| Aug 24, 2026 | Bryan Giraudo (CFO) | Bought (not open market) | — |
| Aug 24, 2026 | Robert Paul Smith JR (C-suite exec) | Bought (not open market) | — |
| Aug 24, 2026 | Waage Christian (VP) | Bought (not open market) | — |
| Aug 24, 2026 | Caryn Peterson (C-suite exec) | Bought (not open market) | — |
| Aug 24, 2026 | Faheem Hasnain (CEO) | Bought (not open market) | — |
| Jun 4, 2026 | Sandra Milligan (Director) | Bought (not open market) | — |
| Jun 4, 2026 | John D Quisel (Director) | Bought (not open market) | — |
| Jun 4, 2026 | Skye Drynan (Director) | Bought (not open market) | — |
| Jun 4, 2026 | Steven D Nathan (Director) | Bought (not open market) | — |
| Jun 4, 2026 | Russell J. Cox (Director) | Bought (not open market) | — |
| Jun 4, 2026 | Thomas O Daniel (Director) | Bought (not open market) | — |
| Mar 19, 2026 | Faheem Hasnain (CEO) | Sold (not open market) | $7.8M |
| Mar 19, 2026 | Faheem Hasnain (CEO) | Sold (not open market) | $4.8M |
| Mar 19, 2026 | Faheem Hasnain (CEO) | Sold (not open market) | $3.2M |
| Mar 19, 2026 | Bryan Giraudo (CFO) | Sold (not open market) | $2M |
| Mar 19, 2026 | Faheem Hasnain (CEO) | Sold (not open market) | $1.7M |
Who's trading GOSS
- Russell J. Cox, Director: other filings, last Sep 23, 2026
- Sandra Milligan, Director: other filings, last Sep 23, 2026
- Steven D Nathan, Director: other filings, last Sep 23, 2026
- Thomas O Daniel, Director: other filings, last Sep 23, 2026
- John D Quisel, Director: other filings, last Sep 23, 2026
- Skye Drynan, Director: other filings, last Sep 23, 2026
- Gregory Austin Ciongoli, Director: other filings, last Sep 23, 2026
- Robert Paul Smith JR, C-suite exec: other filings, last Aug 24, 2026
- Waage Christian, VP: other filings, last Aug 24, 2026
- Bryan Giraudo, CFO: other filings, last Aug 24, 2026
- Faheem Hasnain, CEO: other filings, last Aug 24, 2026
- Caryn Peterson, VP: other filings, last Aug 24, 2026
- Richard Aranda, C-suite exec: other filings, last Mar 19, 2026
Get free alerts when an insider at Gossamer Bio, Inc files a new trade →