Peter McNamara - 03 Mar 2026 Form 4 Insider Report for Tectonic Therapeutic, Inc. (TECX)

Role
Chief Scientific Officer
Signature
/s/ Daniel Lochner, Attorney-in-Fact
Issuer symbol
TECX
Transactions as of
03 Mar 2026
Net transactions value
-$77,627
Form type
4
Filing time
05 Mar 2026, 17:45:05 UTC
Previous filing
10 Feb 2026
Next filing
09 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
McNamara Peter Chief Scientific Officer C/O TECTONIC THERAPEUTIC, INC., 490 ARSENAL WAY, SUITE 200, WATERTOWN /s/ Daniel Lochner, Attorney-in-Fact 05 Mar 2026 0002023255

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TECX Common Stock Sale $36,377 -1,649 -4.2% $22.06 37,482 03 Mar 2026 Direct F1
transaction TECX Common Stock Award +23,000 +61% $0.000000* 60,482 04 Mar 2026 Direct F2
transaction TECX Common Stock Sale $41,250 -1,650 -2.7% $25.00 58,832 04 Mar 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction TECX Employee Stock Option (Right to Buy) Award +21,000 $0.000000* 21,000 04 Mar 2026 Common Stock 21,000 $27.41 Direct F3
* 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 These sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 14, 2025.
F2 These shares are represented by restricted stock units. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. The shares shall vest in 3 equal annual installments on each of March 4, 2027, March 4, 2028 and March 4, 2029, subject to the Reporting Person's continued service to the Issuer on each such vesting date.
F3 The shares subject to the option vest in 48 equal monthly installments beginning on April 4, 2026, subject to the Reporting Person's continued service to the Issuer on each such vesting date.