Tectonic Therapeutic, Inc. (TECX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

18,661,765Shares Outstanding

618,240Shares held by institutions

$13,038,682Value of institutional holdings

75.61%Institutional ownership %

40.89%Shares Changed QoQ

104No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 104 institutional investors hold a position in Tectonic Therapeutic, Inc. (NASDAQ:TECX).

Tectonic Therapeutic saw its institutional ownership percentage rose to 75.6% in December 2025 from 65.3% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 40.89%, with a year-over-year an increase of 48.57% in the count of filers.
Of these 104 institutional investors, 65 increased their holdings in Tectonic Therapeutic, while 24 of them reduced positions, and 15 investors maintained their exposure.
Collectively, institutional investors increased their stake in Tectonic Therapeutic to 14.11Mn shares as of December 2025, a change that is up by 4.10Mn shares quarter on quarter and up 6.45Mn shares year over year.
The top institutional stake in Tectonic Therapeutic as of December 31, 2025 belongs to FMR LLC, which owns 2.81Mn shares, or 15.04% of the company.
Among the most significant buyers of Tectonic Therapeutic during December 2025 were BAKER BROS. ADVISORS LP (803.40K), Aberdeen Group plc (785.65K), ORBIMED ADVISORS LLC (574.60K), Vestal Point Capital, LP (328.00K), PERCEPTIVE ADVISORS LLC (250.00K).
Leading sellers of Tectonic Therapeutic stock in December 2025 included SECTORAL ASSET MANAGEMENT INC (150.51K), Prosight Management, LP (144.25K), UBS Group AG (35.24K), ADAR1 Capital Management, LLC (26.00K), Quadrature Capital Ltd (16.26K).
The top 10 institutional holders of Tectonic Therapeutic for the quarter ending December 2025 included FMR LLC (2.81Mn), Aberdeen Group plc (1.14Mn), BRAIDWELL LP (927.52K), BAKER BROS. ADVISORS LP (903.40K), BlackRock, Inc. (854.36K), 5AM Venture Management, LLC (606.66K), VANGUARD GROUP INC (599.90K), ORBIMED ADVISORS LLC (574.60K), Point72 Asset Management, L.P. (492.33K), Vestal Point Capital, LP (328.00K).

104 Institutional Holders

618,240 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
FMR LLC	31 Dec, 2025	2,807,442	661	0.02%	$58,563,233.00
Aberdeen Group plc	31 Dec, 2025	1,141,824	785,648	220.58%	$23,818,449.00
BRAIDWELL LP	31 Dec, 2025	927,524	190,657	25.87%	$19,348,151.00
BAKER BROS. ADVISORS LP	31 Dec, 2025	903,400	803,400	803.40%	$18,844,924.00
BlackRock, Inc.	31 Dec, 2025	854,363	26,510	3.20%	$17,822,013.00
5AM Venture Management, LLC	31 Dec, 2025	606,660	95,000	18.57%	$12,654,928.00
VANGUARD GROUP INC	31 Dec, 2025	599,898	30,418	5.34%	$12,513,872.00
ORBIMED ADVISORS LLC	31 Dec, 2025	574,600	574,600	0.00%	$11,986,156.00
Point72 Asset Management, L.P.	31 Dec, 2025	492,332	70,577	16.73%	$10,270,046.00
Vestal Point Capital, LP	31 Dec, 2025	328,000	328,000	0.00%	$6,842,080.00
CITADEL ADVISORS LLC	31 Dec, 2025	317,617	19,229	6.44%	$6,625,491.00
Bollard Group LLC	31 Dec, 2025	302,953	0	0.00%	$6,320.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	300,820	62,650	26.30%	$6,275,105.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	263,560	-5,793	-2.15%	$5,498,708.00
Pale Fire Capital SE	31 Dec, 2025	261,026	1,300	0.50%	$5,445,002.00
PERCEPTIVE ADVISORS LLC	31 Dec, 2025	250,000	250,000	0.00%	$5,215,000.00
Prosight Management, LP	31 Dec, 2025	235,000	-144,254	-38.04%	$4,902,100.00
Opaleye Management Inc.	31 Dec, 2025	214,747	214,747	0.00%	$4,479,622.00
KENNEDY CAPITAL MANAGEMENT LLC	31 Dec, 2025	209,225	449	0.22%	$4,364,434.00
STATE STREET CORP	31 Dec, 2025	209,125	43,594	26.34%	$4,362,348.00

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