Daniel Lochner - 04 Feb 2026 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Role: Chief Financial Officer
Signature: /s/ Daniel Lochner
Issuer symbol: TECX
Transactions as of: 04 Feb 2026
Net transactions value: -$48,228
Form type: 4
Filing time: 10 Feb 2026, 16:04:52 UTC
Previous filing: 29 Sep 2025
Next filing: 11 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lochner Daniel	Chief Financial Officer	C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 200, WATERTOWN	/s/ Daniel Lochner	10 Feb 2026	0001791187

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TECX	Common Stock	Tax liability	$48,228	-2,077	-7.4%	$23.22	26,044	04 Feb 2026	Direct	F1

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

Explanation of Responses:

Id	Content
F1	This transaction reported represents the withholding of shares by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units granted on February 4, 2025.