Tectonic Therapeutic Ownership & Insider Activity

Tectonic Therapeutic (TECX) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 25.8% of shares outstanding. Institutional investors hold 32.0%. Over the past 90 days, insiders made 1 sale worth $23K.

Shares Outstanding

19.549M

Shares Float

9.667M

Insider Shares Owned

5.035M

Insider % Owned

25.8%

Institutional Shares Held

6.255M

Institutional % Held

32.0%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$23K total

Net Activity

Net Selling

Net Value (90d)

-$23K

Tectonic Therapeutic Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 25, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL	980.000	$23.33	$23K
Aug 25, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL-OPTIONS	—	$25.62	$938
Aug 12, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL-OPTIONS	—	$24.86	$872
Jun 30, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL-OPTIONS	—	$24.86	$3K
May 4, 2026	Marcella Ruddy	CHIEF MEDICAL OFFICER	SELL	1.065K	$30.00	$32K