TECX

Tectonic Therapeutic, Inc.$28.30-1.41 (-4.75%)

Prev Close$29.71·MCap$539.8M·P/E—·Vol156.8K·Yield—

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Buys (12M)

$182.4K

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Sells (12M)

$877.2K

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Net Activity

Net Seller

$694.8K

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at Tectonic Therapeutic, Inc. (TECX) has been dominated by selling, with 2 insider purchases totaling $182.4K and 12 insider sales totaling $877.2K. The most recent insider transaction was by McNamara Peter (officer: Chief Scientific Officer), who sold $1.6K worth of shares on Aug 26, 2026. Tectonic Therapeutic, Inc. operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $539.8M.

TECX Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Aug 26, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	43	$36.52	$1.6K	55,285
Aug 14, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	43	$35.00	$1.5K	55,285
Jul 1, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	172	$35.00	$6.0K	55,285
May 6, 2026	Ruddy Marcella K.	officer: Chief Medical Officer	Sell	1,065	$30.00	$31.9K	67,682
Mar 9, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	6,262	$30.17	$188.9K	55,500
Mar 9, 2026	Ruddy Marcella K.	officer: Chief Medical Officer	Sell	10,000	$30.00	$300.0K	69,747
Mar 5, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	3,299	$23.53	$77.6K	58,832
Feb 11, 2026	REICIN ALISE	Chief Executive Officer	Buy	2,500	$21.10	$52.8K	0
Feb 10, 2026	Lochner Daniel	Chief Financial Officer	Buy	6,000	$21.61	$129.7K	0
Feb 4, 2026	Lochner Daniel	Chief Financial Officer	Sell	2,077	$23.22	$48.2K	0
Feb 4, 2026	McNamara Peter	Chief Scientific Officer	Sell	1,748	$23.22	$40.6K	0
Feb 4, 2026	REICIN ALISE	Chief Executive Officer	Sell	4,104	$23.22	$95.3K	0
Feb 4, 2026	Ruddy Marcella K.	Chief Medical Officer	Sell	2,064	$23.22	$47.9K	0
Feb 4, 2026	Schwabish Marc	Chief Business Officer	Sell	1,619	$23.22	$37.6K	0
Jun 20, 2025	REICIN ALISE	Chief Executive Officer	Sell	859	$19.81	$17.0K	0
Apr 9, 2025	SPRINGER TIMOTHY A	Director	Buy	141,923	$16.20	$2.30M0.8% OS	0
Apr 7, 2025	MCGUIRE TERRANCE	Director	Sell	500,000	$17.10	$8.55M2.7% OS	0
Apr 7, 2025	SPRINGER TIMOTHY A	Director	Buy	500,000	$17.10	$8.55M2.7% OS	0
Feb 7, 2025	SPRINGER TIMOTHY A		Buy	789,294	$50.68	$40.00M4.2% OS	4,226,058
Feb 7, 2025	Lochner Daniel	Chief Financial Officer	Buy	4,617	$54.14	$250.0K	4,617
Oct 24, 2024	SPRINGER TIMOTHY A		Buy	300,000	$33.59	$10.08M1.6% OS	4,096,764
Sep 26, 2024	SPRINGER TIMOTHY A		Buy	50,000	$28.82	$1.44M	3,796,764
May 15, 2024	Leonard Braden Michael		Buy	766,635	$1.27	$971.5K4.1% OS	4,768,262
Jul 8, 2021	Vickers Philip J.	Director	Buy	4,800	$8.35	$40.1K	4,800

TECX Insider Buying Activity

The following table shows recent insider purchases of Tectonic Therapeutic, Inc. (TECX) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 11, 2026	REICIN ALISE	Chief Executive Officer	Buy	2,500	$21.10	$52.8K	0
Feb 10, 2026	Lochner Daniel	Chief Financial Officer	Buy	6,000	$21.61	$129.7K	0
Apr 9, 2025	SPRINGER TIMOTHY A	Director	Buy	141,923	$16.20	$2.30M0.8% OS	0
Apr 7, 2025	SPRINGER TIMOTHY A	Director	Buy	500,000	$17.10	$8.55M2.7% OS	0
Feb 7, 2025	SPRINGER TIMOTHY A		Buy	789,294	$50.68	$40.00M4.2% OS	4,226,058
Feb 7, 2025	Lochner Daniel	Chief Financial Officer	Buy	4,617	$54.14	$250.0K	4,617
Oct 24, 2024	SPRINGER TIMOTHY A		Buy	300,000	$33.59	$10.08M1.6% OS	4,096,764
Sep 26, 2024	SPRINGER TIMOTHY A		Buy	50,000	$28.82	$1.44M	3,796,764
May 15, 2024	Leonard Braden Michael		Buy	766,635	$1.27	$971.5K4.1% OS	4,768,262
Jul 8, 2021	Vickers Philip J.	Director	Buy	4,800	$8.35	$40.1K	4,800

TECX Insider Selling Activity

The following table shows recent insider sales of Tectonic Therapeutic, Inc. (TECX) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Aug 26, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	43	$36.52	$1.6K	55,285
Aug 14, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	43	$35.00	$1.5K	55,285
Jul 1, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	172	$35.00	$6.0K	55,285
May 6, 2026	Ruddy Marcella K.	officer: Chief Medical Officer	Sell	1,065	$30.00	$31.9K	67,682
Mar 9, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	6,262	$30.17	$188.9K	55,500
Mar 9, 2026	Ruddy Marcella K.	officer: Chief Medical Officer	Sell	10,000	$30.00	$300.0K	69,747
Mar 5, 2026	McNamara Peter	officer: Chief Scientific Officer	Sell	3,299	$23.53	$77.6K	58,832
Feb 4, 2026	Lochner Daniel	Chief Financial Officer	Sell	2,077	$23.22	$48.2K	0
Feb 4, 2026	McNamara Peter	Chief Scientific Officer	Sell	1,748	$23.22	$40.6K	0
Feb 4, 2026	REICIN ALISE	Chief Executive Officer	Sell	4,104	$23.22	$95.3K	0
Feb 4, 2026	Ruddy Marcella K.	Chief Medical Officer	Sell	2,064	$23.22	$47.9K	0
Feb 4, 2026	Schwabish Marc	Chief Business Officer	Sell	1,619	$23.22	$37.6K	0
Jun 20, 2025	REICIN ALISE	Chief Executive Officer	Sell	859	$19.81	$17.0K	0
Apr 7, 2025	MCGUIRE TERRANCE	Director	Sell	500,000	$17.10	$8.55M2.7% OS	0