Daniel Lochner - 04 Mar 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 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 17:43:30 UTC
Previous 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	05 Mar 2026	0001791187

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TECX	Common Stock	Award		+26,500	+83%	$0.000000^*	58,544	04 Mar 2026	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		+24,250		$0.000000^*	24,250	04 Mar 2026	Common Stock	24,250	$27.41	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 March 4, 2027, March 4, 2028 and March 4, 2029, 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 April 4, 2026, subject to the Reporting Person's continued service to the Issuer on each such vesting date.