TECX files Rule 144 notice to sell 1,650 RSUs

TECX proposes sale of common shares under Rule 144.

Rhea-AI Filing Summary

TECX proposes sale of common shares under Rule 144. The filing lists 1,650 restricted stock units with an award date of 02/04/2026 and a proposed sale date of 03/04/2026. It also records 1,649 shares sold under a 10b5-1 plan on 03/03/2026.

Insights

Securities Counsel

Routine Rule 144 notice for prospective insider sales; prior 10b5-1 activity is recorded.

The filing lists 1,650 restricted stock units dated 02/04/2026 and a proposed sale entry dated 03/04/2026, consistent with a Rule 144 notice of intent to sell.

The excerpt also shows a completed 10b5-1 sale of 1,649 shares on 03/03/2026. Cash‑flow treatment and purchaser identity are not stated in the provided content.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the TECX Form 144 disclose about planned sales?

It discloses a proposed sale under Rule 144 of 1,650 restricted stock units with a listed date of 03/04/2026. The filing is a regulatory notice of intent rather than a completed public sale.

Has TECX reported any recent insider sales in this filing?

Yes; the filing records a 10b5-1 sale of 1,649 shares executed on 03/03/2026. That transaction is listed separately from the proposed Rule 144 sale.

What security types are referenced in the TECX Form 144?

The excerpt references Common stock and Restricted Stock Units, with the RSUs dated 02/04/2026 and an indicated quantity of 1,650 units.

Does the Form 144 state who receives proceeds from the sale?

The provided excerpt does not state who receives cash proceeds. The filing lists the securities and dates but does not disclose proceeds recipient details in the excerpt.

What trading venue is listed for the proposed sale in the TECX filing?

The excerpt lists NASDAQ as the market associated with the securities and includes the date 03/04/2026 next to the common shares line.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/04/2026 - 04:42 PM EST Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002023255
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	TECTONIC THERAPEUTIC INC
SEC File Number	001-38537
Address of Issuer	490 Arsenal Way Suite 200 Watertown MASSACHUSETTS 02472
Phone	339-666-3320
Name of Person for Whose Account the Securities are To Be Sold	PETER MCNAMARA
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1650	40251.75	18776626	03/04/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/04/2026	Restricted Stock Units	Issuer			1650	02/04/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for PETER MCNAMARA 490 Arsenal Way Suite 200 Watertown MA 02472	Common	03/03/2026	1649	36376.94

144: Remarks and Signature

Remarks
Date of Notice	03/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/14/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Peter McNamara
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)