Gossamer Bio Director Russell J. Cox Receives 10,000-Share Award

What Happened
Russell J. Cox, a director of Gossamer Bio, received a derivative award for 10,000 shares on 2026-09-23. The Form 4 reports the acquisition price as $0.00 (total reported value $0). This was a grant/award (transaction code A), i.e., compensation rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-09-23; filing date: 2026-09-25 (filed within the two-business-day Form 4 window).
• Amount: 10,000 shares (derivative instrument) at $0.00 per share; total reported consideration $0.
• Shares owned after transaction: Not specified in the provided filing.
• Footnote: The entire award "becomes fully vested and exercisable on the first anniversary of the grant date," subject to Cox’s continued service on the board through that date.
• Filing timeliness: Reported two days after the transaction (timely under Form 4 rules).

Context
This is a typical director compensation grant — a derivative award that vests/exercisable after one year — and not an immediate market purchase. Such grants are common and reflect compensation practices rather than a direct buy/sell signal. Because the award is derivative and subject to vesting/service conditions, it does not represent immediately tradable shares.