Timothy A. Springer - Jun 9, 2025 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Role: Director, 10%+ Owner
Signature: /s/ Daniel Lochner, Attorney-in-Fact
Stock symbol: TECX
Transactions as of: Jun 9, 2025
Transactions value $: $0
Form type: 4
Date filed: 6/11/2025, 04:30 PM
Previous filing: Apr 11, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SPRINGER TIMOTHY A	Director, 10%+ Owner	C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 210, WATERTOWN	/s/ Daniel Lochner, Attorney-in-Fact	2025-06-11	0001055624

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	Stock Option (Right to Buy)	Award	$0	+10.2K		$0.00	10.2K	Jun 9, 2025	Common Stock	10.2K	$24.48	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The option shall vest in full on the earliest of (i) June 9, 2026, (ii) the date of the Issuer's 2026 Annual Meeting of stockholders, or (iii) a "Change in Control" (as defined in the Issuer's 2024 Equity Incentive Plan) of the Issuer, subject in each case, to the Reporting Person providing continuous service to the Issuer on each such date.