Tectonic Therapeutic TECX Institutional Ownership

NASDAQ TECX

$23.34 -0.17 (-0.72%)

At close: Sep 29, 2026 · 4:00 PM EDT

Institutions by Trading Activity

125 Institutions

Increased 67 53.6%

Unchanged 19 15.2%

Reduced 39 31.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

73.81%

▲+0.64 pp QoQ

Shares Held by Institutions

14.00Mn

of 18.96Mn outstanding

▲+3.76% QoQ

Shares Outstanding

18.96Mn

4.97Mn held outside 13F filers

Institutional Investors

125

filed 13F for Jun 2026

▲+15 vs prior quarter

Net Shares Added (QoQ)

+507.35K

accumulated since last quarter

Value of Holdings

$329.06Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Tectonic Therapeutic, Inc. (NASDAQ:TECX) has 125 institutional investors with active 13F positions as of June 2026.

These investors collectively held 73.8% of Tectonic Therapeutic's outstanding shares in June 2026, up from 73.2% in March 2026.
Their total shares held in TECX increased 3.76% from the prior quarter, while the number of investors in Tectonic Therapeutic increased 56.25% year over year.
Activity in TECX broke down as 67 buyers, 39 sellers, and 19 unchanged among 125 total holders.
Combined, these investors held 14.0Mn shares in TECX for June 2026, up by 507.34K shares quarter on quarter, and up 2.44Mn shares year over year.
FMR LLC holds the largest position in TECX at 2.83Mn shares as of June 30, 2026, or 14.92% of shares outstanding.
Leading buyers of Tectonic Therapeutic shares for the quarter ending June 2026 were First Light Asset Management, LLC (152.98K), MILLENNIUM MANAGEMENT LLC (107.18K), Vestal Point Capital, LP (97.0K), CITADEL ADVISORS LLC (90.39K), D. E. Shaw & Co., Inc. (70.43K).
The largest sales of TECX for the quarter ending June 2026 came from BRAIDWELL LP (250.25K), PRICE T ROWE ASSOCIATES INC /MD/ (116.05K), MARSHALL WACE, LLP (57.49K), ExodusPoint Capital Management, LP (48.44K), Soleus Capital Management, L.P. (20.0K).
According to Business Quant data, leading holders of TECX for June 2026 are FMR LLC (2.83Mn), TCG Crossover Management, LLC (1.2Mn), Aberdeen Group plc (1.14Mn), BlackRock, Inc. (862.59K), First Light Asset Management, LLC (800.73K), BAKER BROS. ADVISORS LP (607.79K), 5AM Venture Management, LLC (606.66K), BRAIDWELL LP (596.9K), VANGUARD CAPITAL MANAGEMENT LLC (488.8K), Vestal Point Capital, LP (425.0K).

Form 13F Holdings

125 Institutional Holders

Report period 30 Jun, 2026

Total shares held 14.00Mn

Of outstanding 73.81%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	2,830,378	14.92%	▲13,884	+0.49%	$97.29Mn
2	TCG Crossover Management, LLC	0001839948	1,204,891	6.35%	0	0.00%	$41.42Mn
3	Aberdeen Group plc	0001716774	1,141,824	6.02%	0	0.00%	$39.25Mn
4	BlackRock, Inc.	0002012383	862,592	4.55%	▲2,240	+0.26%	$29.65Mn
5	First Light Asset Management, LLC	0001600004	800,726	4.22%	▲152,983	+23.62%	$27.52Mn
6	BAKER BROS. ADVISORS LP	0001263508	607,788	3.20%	0	0.00%	$20.89Mn
7	5AM Venture Management, LLC	0001799883	606,660	3.20%	0	0.00%	$20.85Mn
8	BRAIDWELL LP	0001920938	596,900	3.15%	▼250,251	-29.54%	$20.52Mn
9	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	488,805	2.58%	▲15,273	+3.23%	$16.80Mn
10	Vestal Point Capital, LP	0001974915	425,000	2.24%	▲97,000	+29.57%	$14.61Mn
11	Bollard Group LLC	0001556218	302,953	1.60%	0	0.00%	$10.41K
12	KENNEDY CAPITAL MANAGEMENT LLC	0000884589	282,202	1.49%	▼4,480	-1.56%	$9.70Mn
13	GEODE CAPITAL MANAGEMENT, LLC	0001214717	270,461	1.43%	▲2,188	+0.82%	$9.30Mn
14	ORBIMED ADVISORS LLC	0001055951	226,600	1.19%	0	0.00%	$7.79Mn
15	State Street Corp	0000093751	219,908	1.16%	▲6,403	+3.00%	$7.56Mn
16	Ikarian Capital, LLC	0001778253	205,837	1.09%	▲48,300	+30.66%	$7.08Mn
17	D. E. Shaw & Co., Inc.	0001009207	186,550	0.98%	▲70,430	+60.65%	$6.41Mn
18	MARSHALL WACE, LLP	0001318757	172,101	0.91%	▼57,494	-25.04%	$5.92Mn
19	MILLENNIUM MANAGEMENT LLC	0001273087	165,525	0.87%	▲107,177	+183.69%	$5.69Mn
20	Squarepoint Ops LLC	0001642575	145,028	0.76%	▼19,391	-11.79%	$4.99Mn

Showing 1 to 20 of 125 holders