Alise Reicin - 11 Feb 2026 Form 4/A - Amendment Insider Report for Tectonic Therapeutic, Inc. (TECX)

Role: Chief Executive Officer, Director
Signature: /s/ Daniel Lochner, Attorney-in-Fact
Issuer symbol: TECX
Transactions as of: 11 Feb 2026
Net transactions value: +$52,750
Form type: 4/A - Amendment
Filing time: 05 Mar 2026, 16:30:32 UTC
Date Of Original Report: 12 Feb 2026
Previous filing: 10 Feb 2026
Next filing: 05 Mar 2026
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 200, WATERTOWN	/s/ Daniel Lochner, Attorney-in-Fact	05 Mar 2026	0001757533

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TECX	Common Stock	Purchase	$52,750	+2,500	+2%	$21.10	127,030	11 Feb 2026	By Trust	F1, F2
holding	TECX	Common Stock						235,047	11 Feb 2026	Direct

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

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $21.02 to $21.15, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
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 price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $21.02 to $21.15, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

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.

Remarks:

This Form 4/A is being filed to correct the Form 4 filed with the Securities and Exchange Commission on February 12, 2026 (the "Original Filing Date"). The Reporting Person's Trust purchased the shares reported in the Form 4 filed on the Original Filing Date, not the Reporting Person directly. This Form 4 reflects the correct ownership of the Reporting Person and the Trust as of the Original Filing Date.