Insider · CIK 0001512984
Russell J. Cox
Files at: GOSS, IMUX, SYRE, JAZZ. On EDGAR ↗
Reported trades — common stock
No reported common-stock activity in this period.
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 23, 2026 AForm 4 → | Sep 25, 4:43 pm EDT | Gossamer Bio, Inc.GOSS | 10,000 | — | — | 10,000 | — | |
| Jun 4, 2026 AForm 4 → | Jun 5, 4:29 pm EDT | Gossamer Bio, Inc.GOSS | 115,000 | — | — | 115,000 | — |