ACET · Adicet Bio, Inc.

$8.95 -0.24 (-2.61%)

Market Cap

$86.03M

9.36M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 56

Total Value: $53,247,994

Total Shares: 6,162,966

Institutional Ownership Trend

24 quarters

Holder Concentration

Across 56 13F filers · Δ vs Mar 31, 2026

Top Holder

15.1%

−3.2 pts

Top 5

52.1%

−2.9 pts

Top 10

71.4%

−3.6 pts

HHI

724

Broadly held−140

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +6

Institutional value: +21.0%

Shares held: -4.6%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega CITADEL ADVISORS LLC	+84,425	466,248
Mega TWO SIGMA INVESTMENTS, LP	+53,733	96,839
Large Trexquant Investment LP	+34,336	78,002
Mega JANE STREET GROUP, LLC	+33,477	70,561
Large RENAISSANCE TECHNOLOGIES LLC	+33,354	265,945

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Large RA CAPITAL MANAGEMENT, L.P.	−250,000	932,624
Mid ORBIMED ADVISORS LLC	−183,157	844,787
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	−12,650	40,250
Mega UBS Group AG	−8,551	29,817
Mega GEODE CAPITAL MANAGEMENT, LLC	−5,501	95,634

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Large Schonfeld Strategic Advisors LLC	195,514	$1,689,240
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC	85,959	$742,685
Large MARSHALL WACE, LLP	79,488	$686,775
Large Quadrature Capital Ltd	36,193	$312,707
Small Verdad Advisers, LP	25,200	$217,728

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large Woodline Partners LP	313,124	$2,132,374
Small Prosight Management, LP	250,244	$1,704,161
Mid ADAR1 Capital Management, LLC	53,827	$366,561
Mega BARCLAYS PLC	25,000	$170,250
Large NewEdge Advisors, LLC	3,854	$26,245

Filter: New 12 Increased 18 Reduced 10 Sold out 6 Unchanged 16

Showing 59 of 59

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

RA CAPITAL MANAGEMENT, L.P.

$8,057,871

15.13%

932,624

ORBIMED ADVISORS LLC

$7,298,959

13.71%

844,787

FRANKLIN RESOURCES INC

$5,413,573

10.17%

626,571

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FRANKLIN ADVISERS INC	626,571	$5,413,573	100.0%	Defined

CITADEL ADVISORS LLC

$3,738,856

7.02%

432,738

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	432,738	$3,738,856	100.0%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$2,965,489

5.57%

343,228

ADAGE CAPITAL PARTNERS GP, L.L.C.

$2,370,600

4.45%

274,375

RENAISSANCE TECHNOLOGIES LLC

$2,297,764

4.32%

265,945

Stonepine Capital Management, LLC

$2,121,275

3.98%

245,518

Alyeska Investment Group, L.P.

$1,760,823

3.31%

203,799

Schonfeld Strategic Advisors LLC

$1,689,240

3.17%

195,514

Carlyle Group Inc.

$1,592,308

2.99%

184,295

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Abingworth LLP	184,295	$1,592,308	100.0%	Defined

NEXTBio Capital Management LP

$1,363,625

2.56%

157,827

ACADIAN ASSET MANAGEMENT LLC

$1,078,548

2.03%

124,832

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	124,832	$1,078,548	100.0%	Defined

TWO SIGMA INVESTMENTS, LP

$836,688

1.57%

96,839

GEODE CAPITAL MANAGEMENT, LLC

$826,277

1.55%

95,634

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	18,763	$162,112	19.6%	Defined
Held directly	76,871	$664,165	80.4%	Defined

DAFNA Capital Management LLC

$810,535

1.52%

93,812

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$742,685

1.39%

85,959

MARSHALL WACE, LLP

$686,775

1.29%

79,488

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	79,488	$686,775	100.0%	Other

Trexquant Investment LP

$673,937

1.27%

78,002

JANE STREET GROUP, LLC

$609,646

1.14%

70,561

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	51,867	$448,130	73.5%	Defined
Jane Street Global Trading, LLC	18,694	$161,516	26.5%	Defined

Burkehill Global Management, LP

$540,000

1.01%

62,500

BlackRock, Inc.

$536,767

1.01%

62,126

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	1,601	$13,832	2.6%	Sole
BlackRock Fund Advisors	23,940	$206,841	38.5%	Sole
BlackRock Institutional Trust Company, N.A.	36,585	$316,094	58.9%	Sole

REGENERON PHARMACEUTICALS, INC.

$522,815

0.98%

60,511

Rangeley Capital, LLC

$439,706

0.83%

50,892

VANGUARD FIDUCIARY TRUST CO

$437,788

0.82%

50,670

RBF Capital, LLC

$333,348

0.63%

38,582

STATE STREET CORP

$312,958

0.59%

36,222

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	36,222	$312,958	100.0%	Defined

Quadrature Capital Ltd

$312,707

0.59%

36,193

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	36,193	$312,707	100.0%	Other

DIMENSIONAL FUND ADVISORS LP

$273,049

0.51%

31,603

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Ireland Ltd	821	$7,093	2.6%	Defined
Held directly	30,782	$265,956	97.4%	Sole

UBS Group AG

$257,618

0.48%

29,817

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	27,651	$238,904	92.7%	Defined
UBS Securities LLC	2,166	$18,714	7.3%	Defined

Verdad Advisers, LP

$217,728

0.41%

25,200

XTX Topco Ltd

$209,813

0.39%

24,284

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	24,284	$209,813	100.0%	Defined

CITADEL ADVISORS LLC

$196,992

0.37%

22,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	22,800	$196,992	100.0%	Defined

JOHNSON & JOHNSON

$196,810

0.37%

22,779

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Johnson & Johnson Innovation - JJDC, Inc.	22,779	$196,810	100.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$178,416

0.34%

20,650

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	20,650	$178,416	100.0%	Other

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$169,344

0.32%

19,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	19,600	$169,344	100.0%	Other

PRELUDE CAPITAL MANAGEMENT, LLC

$160,272

0.30%

18,550

NORTHERN TRUST CORP

$159,287

0.30%

18,436

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	18,436	$159,287	100.0%	Defined

OCCUDO QUANTITATIVE STRATEGIES LP

$143,735

0.27%

16,636

Squarepoint Ops LLC

$131,794

0.25%

15,254

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	15,254	$131,794	100.0%	Defined

Vontobel Holding Ltd.

$119,024

0.22%

13,776

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK VONTOBEL AG	13,776	$119,024	100.0%	Defined

AXQ CAPITAL, LP

$94,962

0.18%

10,991

Jump Financial, LLC

$94,538

0.18%

10,942

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Leap GP LLC joint	10,942	$94,538	100.0%	Defined

CITADEL ADVISORS LLC

$92,534

0.17%

10,710

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	10,710	$92,534	100.0%	Defined

Arax Advisory Partners

$51,840

0.10%

6,000

Vanguard Global Advisers, LLC

$45,109

0.08%

5,221

SIMPLEX TRADING, LLC

$41,592

0.08%

4,814

MORGAN STANLEY

$19,793

0.04%

2,291

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO. LLC	129	$1,114	5.6%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	2,162	$18,679	94.4%	Defined

ROYAL BANK OF CANADA

$14,695

0.03%

1,701

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Dominion Securities Inc.	1,687	$14,575	99.2%	Defined
Held directly	14	$120	0.8%	Sole

Tower Research Capital LLC (TRC)

$2,393

0.00%

277

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	277	$2,393	100.0%	Defined

Avion Wealth

$2,125

0.00%

246

JPMORGAN CHASE & CO

$1,693

0.00%

196

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	188	$1,624	95.9%	Defined
J.P. Morgan Securities plc	8	$69	4.1%	Defined

BNP PARIBAS ARBITRAGE, SA

$432

0.00%

Caitong International Asset Management Co., Ltd

$406

0.00%

SBI Securities Co., Ltd.

$207

0.00%

NATIONAL BANK OF CANADA /FI/

$146

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
National Bank Financial Inc.	17	$146	100.0%	Defined

FMR LLC

$51

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STRATEGIC ADVISERS LLC	6	$51	100.0%	Defined

TD Waterhouse Canada Inc.

$25

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TORONTO DOMINION BANK	3	$25	100.0%	Defined

DANSKE BANK A/S

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	25,000	$170,250	100.0%	Defined

Key facts CIK 1720580 CUSIP 007002207 13F (30d) 56 filings 55 filers Visit website Investor relations