Vitorovic Stefan 4

What Happened
Stefan Vitorovic, a director of Tectonic Therapeutic, received a derivative equity award covering 10,200 shares on June 9, 2026. The grant is reported at $0.00 (no cash paid at grant) and is recorded as an award/derivative on the Form 4.

Key Details

• Transaction date: 2026-06-09; Filing date: 2026-06-10 (timely filing).
• Transaction type/code: Award/Grant (A); reported price $0.00.
• Shares/units granted: 10,200 (derivative instrument described as an option in the filing footnote).
• Shares owned after transaction: Not specified in the filing.
• Footnote: The option vests in full on the earliest of (i) June 9, 2027, (ii) the issuer's 2027 annual meeting, or (iii) a "Change in Control," provided Vitorovic remains in continuous service.
• No indication of a 10b5-1 plan, tax-withholding sale, or immediate sale of shares in this filing.

Context
This was a grant of a derivative equity award (an option per the footnote) rather than an open-market purchase or sale—no cash changed hands at grant and no immediate market trade occurred. Vesting is time- and event-based, so the award does not convert into vested shares until the vesting conditions are met. As always, grants to directors are common compensation practices and do not by themselves indicate a buy or sell signal.