Lu Timothy K 4

What Happened

• Timothy K. Lu, CEO and a director of Senti Biosciences (SNTI), had 80,666 shares of common stock withheld on 2026-03-09 to satisfy income tax withholding in connection with the net settlement of time‑based restricted stock units (RSUs). The filing reports the shares as a disposition at $0.00 per share (total proceeds $0) because they were retained by the issuer to cover tax obligations rather than sold in the open market.

Key Details

• Transaction date: 2026-03-09; Form 4 filed: 2026-03-11.
• Reported amount: 80,666 shares @ $0.00 (tax withholding/net settlement; code F).
• Shares owned after transaction: not specified on this Form 4.
• Footnotes: (F1) Shares were withheld by the issuer to satisfy tax withholding for a net settlement of RSUs — not an open‑market sale. (F2) Some shares are held by Luminen Services, LLC as trustee of the Luminen Trust; Mr. Lu disclaims beneficial ownership except for any pecuniary interest.
• Filing timeliness: filed within the dates shown on the form (no late‑filing flag indicated).

Context

• This was a routine net settlement/tax‑withholding of vested RSUs (cashless/net settlement), a common administrative action that reduces reported holdings without indicating a market sale or a change in investment intent. For retail investors, tax withholding events like this are generally procedural and should not be interpreted by themselves as a bullish or bearish insider signal.