Peter McNamara - Sep 25, 2025 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Role: Chief Scientific Officer
Signature: /s/ Daniel Lochner, Attorney-in-Fact
Stock symbol: TECX
Transactions as of: Sep 25, 2025
Transactions value $: $0
Form type: 4
Date filed: 9/29/2025, 05:00 PM
Previous filing: Feb 6, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
McNamara Peter	Chief Scientific Officer	C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 210, WATERTOWN	/s/ Daniel Lochner, Attorney-in-Fact	2025-09-29	0002023255

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TECX	Common Stock	Award	$0	+4.55K	+15.51%	$0.00	33.9K	Sep 25, 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TECX	Employee Stock Option (Right to Buy)	Award	$0	+8.26K		$0.00	8.26K	Sep 25, 2025	Common Stock	8.26K	$14.71	Direct	F2

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

Explanation of Responses:

Id	Content
F1	These shares are represented by restricted stock units. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. The shares shall vest in 3 equal annual installments on each of September 25, 2026, September 25, 2027 and September 25, 2028, subject to the Reporting Person's continued service to the Issuer on each such vesting date.
F2	The shares subject to the option vest in 48 equal monthly installments beginning on October 25, 2025, subject to the Reporting Person's continued service to the Issuer on each such vesting date.