Cox Russell J. 4

What Happened

• Russell J. Cox, a director of Gossamer Bio (GOSS), was granted an award of 115,000 derivative shares (transaction code A) on 2026-06-04. The award shows an acquisition price of $0.00 (no cash paid). This is a compensation grant to a non-employee director rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-06-04; Form 4 filed: 2026-06-05 (timely; Form 4s are generally due within two business days).
• Amount: 115,000 derivative shares; reported price: $0.00.
• Shares owned after transaction: not specified in the provided excerpt of the filing.
• Footnote F1: Award made pursuant to the Non-Employee Director Compensation Program.
• Footnote F2: The entire award becomes fully vested and exercisable on the earlier of (a) the first anniversary of the grant or (b) the next annual meeting of stockholders, subject to continued board service.

Context

• This is a routine equity award to a non-employee director as part of director compensation. As a grant (not a purchase or sale), it does not by itself signal buying or selling intent and typically vests over time per the stated schedule.