SEC Form 4 · accession 0001859810-26-000003
Gossamer Bio, Inc. · GOSS
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Sandra Milligan
Director
Period of report
Jun 4, 2026
Accepted (ET)
Jun 5, 2026 · 4:28 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001728117
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F1,F2 | $0.178 | Jun 4, 2026 | A | 115,000 | A | — | Jun 3, 2036 | Common Stock | 115,000 | 115,000 | D |
Explanation of responses
- F1Award made pursuant to Non-Employee Director Compensation Program.
- F2The entire number of shares subject to this option becomes fully vested and exercisable on the first to occur of (a) the first anniversary of the grant date or (b) the next occurring annual meeting of the Issuer's stockholders, subject to the Reporting Person's continued service on the board of directors of the Issuer through such vesting date.