Tectonic Therapeutic (TECX) CEO buys 2,500 shares in open market

Rhea-AI Filing Summary

Tectonic Therapeutic, Inc. Chief Executive Officer and director Alise Reicin reported an open-market purchase of 2,500 shares of common stock on February 11, 2026. The shares were bought at a weighted average price of $21.10 per share, with individual trades ranging from $21.02 to $21.15.

Following this transaction, Reicin directly holds 237,547 common shares. In addition, 124,530 common shares are held indirectly by the Reicin-Boiarsky Family Trust, where her spouse is a co-trustee. She may be deemed to share voting and dispositive power over the trust’s shares but disclaims beneficial ownership beyond her pecuniary interest.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

REICIN ALISE

(Last) (First) (Middle)

C/O TECTONIC THERAPEUTIC, INC.

490 ARSENAL WAY, SUITE 200

(Street)

WATERTOWN MA 02472

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Tectonic Therapeutic, Inc. [ TECX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/11/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/11/2026		P		2,500	A	$21.1(1)	237,547	D
Common Stock								124,530	I	By Trust(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. 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.

	/s/ Daniel Lochner, Attorney-in-Fact	02/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did TECX’s CEO report on February 11, 2026?

Alise Reicin, CEO of Tectonic Therapeutic (TECX), bought 2,500 common shares on February 11, 2026. The filing describes this as an open-market purchase at a weighted average price of $21.10 per share, reflecting a direct increase in her personal share ownership.

At what prices did the TECX CEO’s 2,500-share purchase occur?

The 2,500 TECX shares were purchased at prices ranging from $21.02 to $21.15. The reported $21.10 price is a weighted average across multiple trades, and the insider has committed to provide detailed trade breakdowns to the issuer, security holders, or regulators upon request.

How many TECX shares does the CEO own directly after this transaction?

After the reported trade, TECX CEO Alise Reicin directly owns 237,547 common shares. This figure represents her direct holdings only and excludes additional shares reported as indirectly owned through a family trust structure referenced separately in the filing.

What TECX shares are held indirectly through the Reicin-Boiarsky Family Trust?

The filing reports 124,530 TECX common shares held indirectly by the Reicin-Boiarsky Family Trust. Reicin’s spouse is a co-trustee, and she may share voting and dispositive power, while expressly disclaiming beneficial ownership beyond her pecuniary interest in those trust-held shares.

Does the TECX CEO fully acknowledge beneficial ownership of the trust-held shares?

No, the CEO disclaims full beneficial ownership of shares held by the Reicin-Boiarsky Family Trust. She may be deemed to share voting and dispositive power but limits acknowledged beneficial ownership to the extent of her pecuniary interest, as expressly stated in the footnote language.

What does the transaction code 'P' mean in the TECX insider filing?

In the TECX Form 4, transaction code “P” indicates a purchase in an open market or private transaction. Here, it identifies the CEO’s acquisition of 2,500 common shares, distinguishing it from mere holdings or other non-purchase-related ownership changes reported in Section 16 filings.