REICIN ALISE 4

What Happened
Alise Reicin, CEO of Tectonic Therapeutic (TECX), had 4,104 shares withheld by the company on Feb 4, 2026 to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units (RSUs). The shares were valued at $23.22 each, for a total value of approximately $95,295. This was a tax-withholding disposition (transaction code F), not an open-market sale or new purchase.

Key Details

• Transaction date and price: Feb 4, 2026; 4,104 shares withheld at $23.22/share.
• Reported value of shares withheld: ~$95,295.
• Shares owned after transaction: not specified in the filing.
• Footnote: withholding was to satisfy taxes on RSUs granted Feb 4, 2025. (F1)
• Footnote re trust: some shares are held by the Reicin-Boiarsky Family Trust; spouse is co-trustee and the reporting person disclaims beneficial ownership of trust shares except to the extent of any pecuniary interest. (F2)
• Filing: Form 4 filed Feb 10, 2026 reporting the Feb 4 transaction.

Context
Withholding shares to cover taxes on vested RSUs is a routine, administrative transaction and does not necessarily signal the insider’s view on the company’s stock. Transaction code F indicates shares were surrendered/withheld for tax purposes rather than sold on the open market.