Alise Reicin - Jun 20, 2025 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Role: Chief Executive Officer, Director
Signature: /s/ Daniel Lochner, Attorney-in-Fact
Stock symbol: TECX
Transactions as of: Jun 20, 2025
Transactions value $: -$17,017
Form type: 4
Date filed: 6/24/2025, 04:55 PM
Previous filing: Jun 9, 2025
Next filing: Sep 29, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
REICIN ALISE	Chief Executive Officer, Director	C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 210, WATERTOWN	/s/ Daniel Lochner, Attorney-in-Fact	2025-06-24	0001757533

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TECX	Common Stock	Tax liability	-$17K	-859	-0.4%	$19.81	213K	Jun 20, 2025	Direct	F1
holding	TECX	Common Stock						125K	Jun 20, 2025	By Trust	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The transaction reported represents the withholding of shares by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the non-reportable vesting and settlement of restricted stock units granted on December 4, 2024.
F2	These shares are held by the Reicin-Boiarsky Family Trust (the "Trust"). The Reporting Person's spouse is a co-trustee of the Trust. Accordingly, the Reporting Person may be deemed to have shared voting and dispositive power over the securities held by the Trust. The Reporting Person disclaims beneficial ownership of the shares held by the Trust except to the extent of her pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

Content

The transaction reported represents the withholding of shares by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the non-reportable vesting and settlement of restricted stock units granted on December 4, 2024.

These shares are held by the Reicin-Boiarsky Family Trust (the "Trust"). The Reporting Person's spouse is a co-trustee of the Trust. Accordingly, the Reporting Person may be deemed to have shared voting and dispositive power over the securities held by the Trust. The Reporting Person disclaims beneficial ownership of the shares held by the Trust except to the extent of her pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.