Peter McNamara - 12 Aug 2026 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Reporting relationship: Chief Scientific Officer
Issuer ticker: TECX
Reported as of: 12 Aug 2026
Net transaction value: -$1,505
SEC form: 4
Accepted by SEC: 14 Aug 2026, 19:25:44 UTC
Prior SEC filing: 01 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Lochner, Attorney-in-Fact

Key filing fact

Peter McNamara filed Form 4 for Tectonic Therapeutic, Inc. (TECX) on 14 Aug 2026.

Key facts

This page summarizes Peter McNamara's Form 4 filing for Tectonic Therapeutic, Inc. (TECX).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 14 Aug 2026, 19:25.

Change

Previous filing in this sequence was filed on 01 Jul 2026.
Current net transaction value: -$1,505.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002023255 Primary reporting owner

McNamara Peter

Relationship: Chief Scientific Officer
Address: C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 200, WATERTOWN
Signature: /s/ Daniel Lochner, Attorney-in-Fact
Signature date: 14 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TECX transaction

Common Stock

Options Exercise

Transaction value
Shares: +43
Change %: +0.08%
Price: $14.71^*
Shares after: 55,328
Date: 12 Aug 2026
Ownership: Direct
Footnotes: F1

TECX transaction

Common Stock

Sale

Transaction value: $1,505
Shares: -43
Change %: -0.08%
Price: $35.00
Shares after: 55,285
Date: 12 Aug 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TECX transaction Derivative

Employee Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -43
Change %: -0.55%
Price: $0.000000^*
Shares after: 7,830
Date: 12 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 43
Exercise price: $14.71
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

This exercise and subsequent sale was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 14, 2025.

Footnote F2

The shares subject to the option vest in 48 equal monthly installments beginning on October 25, 2025, subject to the Reporting Person's continued service to the Issuer on each such vesting date.