Marcella K. Ruddy - 06 Mar 2026 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Signature
/s/ Daniel Lochner, Attorney-in-Fact
Issuer symbol
TECX
Transactions as of
06 Mar 2026
Net transactions value
-$300,000
Form type
4
Filing time
09 Mar 2026, 18:15:19 UTC
Previous filing
05 Mar 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ruddy Marcella K. Chief Medical Officer C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 200, WATERTOWN /s/ Daniel Lochner, Attorney-in-Fact 09 Mar 2026 0002023849

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TECX Common Stock Sale $300,000 -10,000 -13% $30.00 69,747 06 Mar 2026 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 This sale was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 8, 2025.