Adicet Bio ACET Institutional Ownership

NASDAQ ACET

$6.64 -0.50 (-7.00%)

At close: Oct 1, 2026 · 4:00 PM EDT

Institutions by Trading Activity

56 Institutions

Increased 32 57.1%

Unchanged 15 26.8%

Reduced 9 16.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

56.86%

▼-0.44 pp QoQ

Shares Held by Institutions

6.11Mn

of 10.75Mn outstanding

▲+7.18% QoQ

Shares Outstanding

10.75Mn

4.64Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▲+9 vs prior quarter

Net Shares Added (QoQ)

+409.20K

accumulated since last quarter

Value of Holdings

$43.62Mn

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

Adicet Bio, Inc. (NASDAQ:ACET) appears in 56 institutional 13F filings for the quarter ending June 2026.

They owned 56.9% of outstanding stock in June 2026, down from 57.3% the prior quarter.
Their total shares held in ACET increased 7.18% quarter over quarter, and separately, investors owning Adicet Bio increased 16.67% from a year ago.
Of these 56 funds, 32 grew their exposure to Adicet Bio, 9 cut back, and 15 maintained positions.
The aggregate institutional position in Adicet Bio amounted to 6.11Mn shares as of June 2026, up by 409.2K shares quarter on quarter, and up 2.92Mn shares year over year.
RA CAPITAL MANAGEMENT, L.P. holds the largest position in ACET at 932.62K shares as of June 30, 2026, or 8.68% of shares outstanding.
The biggest buyers of Adicet Bio for the quarter ending June 2026 included Schonfeld Strategic Advisors LLC (195.51K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (85.96K), MARSHALL WACE, LLP (79.49K), Regeneron Pharmaceuticals, Inc. (60.51K), TWO SIGMA INVESTMENTS, LP (53.73K).
The biggest sellers of Adicet Bio for the quarter ending June 2026 included RA CAPITAL MANAGEMENT, L.P. (250.0K), ORBIMED ADVISORS LLC (183.16K), UBS Group AG (8.55K), GEODE CAPITAL MANAGEMENT, LLC (5.5K), Rangeley Capital, LLC (5.11K).
Adicet Bio's 10 largest shareholders as of June 2026 include RA CAPITAL MANAGEMENT, L.P. (932.62K), ORBIMED ADVISORS LLC (844.79K), Franklin Templeton Inc (626.57K), CITADEL ADVISORS LLC (432.74K), VANGUARD CAPITAL MANAGEMENT LLC (343.23K), ADAGE CAPITAL PARTNERS GP, L.L.C. (274.38K), RENAISSANCE TECHNOLOGIES LLC (265.94K), Stonepine Capital Management, LLC (245.52K), Alyeska Investment Group, L.P. (203.8K), Schonfeld Strategic Advisors LLC (195.51K) per Business Quant data.

Form 13F Holdings

56 Institutional Holders

Report period 30 Jun, 2026

Total shares held 6.11Mn

Of outstanding 56.86%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	RA CAPITAL MANAGEMENT, L.P.	0001346824	932,624	8.68%	▼250,000	-21.14%	$8.06Mn
2	ORBIMED ADVISORS LLC	0001055951	844,787	7.86%	▼183,157	-17.82%	$7.30Mn
3	Franklin Templeton Inc	0000038777	626,571	5.83%	0	0.00%	$5.41Mn
4	CITADEL ADVISORS LLC	0001423053	432,738	4.03%	▲50,915	+13.33%	$3.74Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	343,228	3.19%	▲6,704	+1.99%	$2.97Mn
6	ADAGE CAPITAL PARTNERS GP, L.L.C.	0001165408	274,375	2.55%	0	0.00%	$2.37Mn
7	RENAISSANCE TECHNOLOGIES LLC	0001037389	265,945	2.47%	▲33,354	+14.34%	$2.30Mn
8	Stonepine Capital Management, LLC	0001440771	245,518	2.28%	▲23,563	+10.62%	$2.12Mn
9	Alyeska Investment Group, L.P.	0001453072	203,799	1.90%	0	0.00%	$1.76Mn
10	Schonfeld Strategic Advisors LLC	0001665241	195,514	1.82%	▲195,514	0.00%	$1.69Mn
11	Carlyle Group Inc.	0001527166	184,295	1.72%	0	0.00%	$1.59Mn
12	NEXTBio Capital Management LP	0002038158	157,827	1.47%	0	0.00%	$1.36Mn
13	ACADIAN ASSET MANAGEMENT LLC	0000916542	124,832	1.16%	▲6,694	+5.67%	$1.08K
14	TWO SIGMA INVESTMENTS, LP	0001179392	96,839	0.90%	▲53,733	+124.65%	$836.69K
15	GEODE CAPITAL MANAGEMENT, LLC	0001214717	95,634	0.89%	▼5,501	-5.44%	$826.70K
16	DAFNA Capital Management LLC	0001389933	93,812	0.87%	0	0.00%	$810.54K
17	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0001107261	85,959	0.80%	▲85,959	0.00%	$742.69K
18	MARSHALL WACE, LLP	0001318757	79,488	0.74%	▲79,488	0.00%	$686.78K
19	Trexquant Investment LP	0001633445	78,002	0.73%	▲34,336	+78.63%	$673.94K
20	JANE STREET GROUP, LLC	0001595888	70,561	0.66%	▲33,477	+90.27%	$609.65K

Showing 1 to 20 of 56 holders