Timothy A. Springer - 09 Jun 2026 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: TECX
Reported as of: 09 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 10 Jun 2026, 16:45:11 UTC
Prior SEC filing: 06 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Lochner, Attorney-in-Fact

Key filing fact

Timothy A. Springer filed Form 4 for Tectonic Therapeutic, Inc. (TECX) on 10 Jun 2026.

Key facts

This page summarizes Timothy A. Springer's Form 4 filing for Tectonic Therapeutic, Inc. (TECX).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 10 Jun 2026, 16:45.

Change

Previous filing in this sequence was filed on 06 Jan 2026.
Current net transaction value: $0.

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 0001055624 Primary reporting owner

SPRINGER TIMOTHY A

Relationship: Director, 10%+ Owner
Address: C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 200, WATERTOWN
Signature: /s/ Daniel Lochner, Attorney-in-Fact
Signature date: 10 Jun 2026

Reported derivative securities

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

TECX transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value
Shares: +10,200
Change %
Price: $0.000000^*
Shares after: 10,200
Date: 09 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,200
Exercise price: $28.56
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The option shall vest in full on the earliest of (i) June 9, 2027, (ii) the date of the Issuer's 2027 Annual Meeting of Stockholders, or (iii) a "Change in Control" (as defined in the Issuer's 2024 Equity Incentive Plan) of the Issuer, subject in each case, to the Reporting Person providing continuous service to the Issuer on each such date.