Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Adicet Bio, Inc.

CIK 0001720580ACET· quarter ending 2026-06-30

Shares outstanding

9,361,490

as of 2026-08-03 · 10-Q cover page, filed 2026-08-05

Held by 13F filers

6,109,856

65.3% of shares outstanding

Holders

+8 vs 2026-03-31 · 14 new, 6 exited

Value

$52.8M

shares -3.8% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-05, as of 2026-08-03)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	ACET · NASDAQ	9,361,490	6,109,856	65.3%	56	007002207

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	007002207	COM NEW	56	6,109,856	9,361,490	65.3%	$52.8M	1 call / 2 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 1 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (56 of 56 · 007002207)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	RA CAPITAL MANAGEMENT, L.P.	932,624	9.96%	$8.1M	-250,000 (-21.1%)
2	ORBIMED ADVISORS LLC	844,787	9.02%	$7.3M	-183,157 (-17.8%)
3	FRANKLIN RESOURCES INC	626,571	6.69%	$5.4M	—
4	CITADEL ADVISORS LLC	432,738	4.62%	$3.7M	+50,915 (+13.3%)
5	VANGUARD CAPITAL MANAGEMENT LLC	343,228	3.67%	$3.0M	+6,704 (+2.0%)
6	ADAGE CAPITAL PARTNERS GP, L.L.C.	274,375	2.93%	$2.4M	—
7	RENAISSANCE TECHNOLOGIES LLC	265,945	2.84%	$2.3M	+33,354 (+14.3%)
8	Stonepine Capital Management, LLC	245,518	2.62%	$2.1M	+23,563 (+10.6%)
9	Alyeska Investment Group, L.P.	203,799	2.18%	$1.8M	—
10	Schonfeld Strategic Advisors LLC	195,514	2.09%	$1.7M	NEW
11	Carlyle Group Inc.	184,295	1.97%	$1.6M	—
12	NEXTBio Capital Management LP	157,827	1.69%	$1.4M	—
13	ACADIAN ASSET MANAGEMENT LLC	124,832	1.33%	$1.1M	+6,694 (+5.7%)
14	TWO SIGMA INVESTMENTS, LP	96,839	1.03%	$837K	+53,733 (+124.7%)
15	GEODE CAPITAL MANAGEMENT, LLC	95,634	1.02%	$827K	-5,501 (-5.4%)
16	DAFNA Capital Management LLC	93,812	1.00%	$811K	—
17	BRIDGEWAY CAPITAL MANAGEMENT, LLC	85,959	0.92%	$743K	NEW
18	MARSHALL WACE, LLP	79,488	0.85%	$687K	NEW
19	Trexquant Investment LP	78,002	0.83%	$674K	+34,336 (+78.6%)
20	JANE STREET GROUP, LLC	70,561	0.75%	$610K	+33,477 (+90.3%)
21	Burkehill Global Management, LP	62,500	0.67%	$540K	—
22	BlackRock, Inc.	62,126	0.66%	$537K	+25,541 (+69.8%)
23	REGENERON PHARMACEUTICALS, INC.	60,511	0.65%	$523K	NEW
24	Rangeley Capital, LLC	50,892	0.54%	$440K	-5,108 (-9.1%)
25	VANGUARD FIDUCIARY TRUST CO	50,670	0.54%	$438K	+336 (+0.7%)
26	RBF Capital, LLC	38,582	0.41%	$333K	—
27	STATE STREET CORP	36,222	0.39%	$313K	—
28	Quadrature Capital Ltd	36,193	0.39%	$313K	NEW
29	DIMENSIONAL FUND ADVISORS LP	31,603	0.34%	$273K	+20,825 (+193.2%)
30	UBS Group AG	29,817	0.32%	$258K	-8,551 (-22.3%)
31	Verdad Advisers, LP	25,200	0.27%	$218K	NEW
32	XTX Topco Ltd	24,284	0.26%	$210K	+5,158 (+27.0%)
33	JOHNSON & JOHNSON	22,779	0.24%	$197K	—
34	SUSQUEHANNA INTERNATIONAL GROUP, LLP	20,650	0.22%	$178K	NEW
35	PRELUDE CAPITAL MANAGEMENT, LLC	18,550	0.20%	$160K	NEW
36	NORTHERN TRUST CORP	18,436	0.20%	$159K	-764 (-4.0%)
37	OCCUDO QUANTITATIVE STRATEGIES LP	16,636	0.18%	$144K	+1,536 (+10.2%)
38	Squarepoint Ops LLC	15,254	0.16%	$132K	NEW
39	Vontobel Holding Ltd.	13,776	0.15%	$119K	-471 (-3.3%)
40	AXQ CAPITAL, LP	10,991	0.12%	$95K	NEW
41	Jump Financial, LLC	10,942	0.12%	$95K	NEW
42	Arax Advisory Partners	6,000	0.06%	$52K	NEW
43	Vanguard Global Advisers, LLC	5,221	0.06%	$45K	—
44	SIMPLEX TRADING, LLC	4,814	0.05%	$42K	+3,421 (+245.6%)
45	MORGAN STANLEY	2,291	0.02%	$20K	-1,202 (-34.4%)
46	ROYAL BANK OF CANADA	1,701	0.02%	$15K	+2 (+0.1%)
47	Tower Research Capital LLC (TRC)	277	0.00%	$2K	-1,144 (-80.5%)
48	Avion Wealth	246	0.00%	$2K	—
49	JPMORGAN CHASE & CO	196	0.00%	$2K	+188 (+2350.0%)
50	BNP PARIBAS FINANCIAL MARKETS	50	0.00%	$432	—
51	Caitong International Asset Management Co., Ltd	47	0.00%	$406	+44 (+1466.7%)
52	SBI Securities Co., Ltd.	24	0.00%	$207	+5 (+26.3%)
53	NATIONAL BANK OF CANADA /FI/	17	0.00%	$146	—
54	FMR LLC	6	0.00%	$52	NEW
55	TD Waterhouse Canada Inc.	3	0.00%	$26	NEW
56	DANSKE BANK A/S	1	0.00%	$9	—

Exited since 2026-03-31 (6 filers; largest 6 shown)

Woodline Partners LP	−313,124
Prosight Management, LP	−250,244
ADAR1 Capital Management, LLC	−53,827
BARCLAYS PLC	−25,000
NewEdge Advisors, LLC	−3,854
FNY Investment Advisers, LLC	−3,200

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Peter Kolchinsky	SCHEDULE 13G/A	2026-08-14	2026-06-30	935,486	9.9%
Rajeev Shah	SCHEDULE 13G/A	2026-08-14	2026-06-30	935,486	9.9%
RA Capital Management, L.P.	SCHEDULE 13G/A	2026-08-14	2026-06-30	935,486	9.9%
RA Capital Healthcare Fund, L.P.	SCHEDULE 13G/A	2026-08-14	2026-06-30	935,486	9.9%
Woodline Partners LP	SCHEDULE 13G/A	2026-05-15	2026-03-31	313,124	3.3%
ORBIMED ADVISORS LLC	SCHEDULE 13D/A	2026-04-10	2026-04-08	844,787	8.8%
ORBIMED ADVISORS ISRAEL II LTD	SCHEDULE 13D/A	2026-04-10	2026-04-08	0	0%
ORBIMED CAPITAL GP V LLC	SCHEDULE 13D/A	2026-04-10	2026-04-08	564,147	5.9%
OrbiMed Genesis GP LLC	SCHEDULE 13D/A	2026-04-10	2026-04-08	0	0%
ORBIMED ISRAEL BIOFUND GP LIMITED PARTNERSHIP	SCHEDULE 13D/A	2026-04-10	2026-04-08	0	0%
ORBIMED ISRAEL GP II, L.P.	SCHEDULE 13D/A	2026-04-10	2026-04-08	0	0%
ORBIMED ISRAEL GP LTD.	SCHEDULE 13D/A	2026-04-10	2026-04-08	0	0%
ORBIMED CAPITAL GP VI LLC	SCHEDULE 13D/A	2026-04-10	2026-04-08	280,640	2.9%
KEVIN TANG	SCHEDULE 13G/A	2026-02-17	2025-12-31	6,158	0.1%
TANG CAPITAL MANAGEMENT, LLC	SCHEDULE 13G/A	2026-02-17	2025-12-31	6,158	0.1%
TANG CAPITAL PARTNERS III, INC	SCHEDULE 13G/A	2026-02-17	2025-12-31	0	0%
TANG CAPITAL PARTNERS INTERNATIONAL, LP	SCHEDULE 13G/A	2026-02-17	2025-12-31	6,158	0.1%
TANG CAPITAL PARTNERS IV, INC	SCHEDULE 13G/A	2026-02-17	2025-12-31	0	0%
TANG CAPITAL PARTNERS, LP	SCHEDULE 13G/A	2026-02-17	2025-12-31	0	0%
Charles B. Johnson	SCHEDULE 13G	2026-01-29	2025-12-31	0	0%
Franklin Resources, Inc.	SCHEDULE 13G	2026-01-29	2025-12-31	626,571	6.5%
Rupert H. Johnson, Jr.	SCHEDULE 13G	2026-01-29	2025-12-31	0	0%
Franklin Advisers, Inc.	SCHEDULE 13G	2026-01-29	2025-12-31	626,571	6.5%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.