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Disclosery

ACET ADICET BIO INC

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COM NEW (common), issuer CIK 1720580

46 managers (48 13F filers) reported a position in ACET shares at 2026-03-31, 6,349,910 shares in all. 9 filers opened a position and 11 filers sold out during the quarter.

Managers
46
13F filers
48
New
9
Added
12
Reduced
8
Sold out
11
Shares held by filers
6,349,910

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.1,182,624$8.05M0.09%+234,37513F-HRTimelineGroup
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC1,027,944$7M0.15%013F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources626,571$4.27M<0.01%013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 3 filers holding392,079$2.67MnewTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC381,823$2.6M<0.01%+274,00913F-HRTimelineGroup
Woodline Partners LP313,124$2.13M0.01%-311,87613F-HR/ATimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…274,375$1.87M<0.01%013F-HRTimelineGroup
Prosight Management, LP250,244$1.7M0.28%013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC232,591$1.58M<0.01%-10,35413F-HRTimeline
Stonepine Capital Management, LLC221,955$1.51M1.33%+1,94413F-HRTimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.203,799$1.39M<0.01%013F-HRTimelineGroup
Carlyle Group Inc.in group Carlyle Group Inc.184,295$1.26M0.01%013F-HRTimelineGroup
NEXTBio Capital Management LP157,827$1.07M0.5%013F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC118,138$802K<0.01%-63,25713F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC101,135$689K<0.01%+12,27913F-HRTimelineGroup
DAFNA Capital Management LLC93,812$639K0.15%013F-HRTimeline
Burkehill Global Management, LP62,500$426K0.02%013F-HRTimeline
Rangeley Capital, LLC56,000$381K0.41%+30,99913F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC53,827$367K0.02%-74,81913F-HRTimelineGroup
Trexquant Investment LP43,666$297K<0.01%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP43,106$294K<0.01%-101,69013F-HRTimelineGroup
RBF Capital, LLC38,582$263K0.01%013F-HR/ATimeline
UBS Group AGin group UBS Group AG38,368$261K<0.01%+34,57113F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC37,084$253K<0.01%new13F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.36,585$249K<0.01%013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP36,222$247K<0.01%+10,32613F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC25,000$170K<0.01%013F-HRTimelineGroup
JOHNSON & JOHNSONin group JOHNSON & JOHNSON22,779$155K0.02%013F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP19,200$131K<0.01%+5,13313F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd19,126$130K<0.01%+51613F-HRTimelineGroup
OCCUDO QUANTITATIVE STRATEGIES LP15,100$114K0.01%new13F-HRTimeline
Vontobel Holding Ltd.in group Vontobel Holding Ltd.14,247$97K<0.01%new13F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP10,778$73.4K<0.01%new13F-HRTimelineGroup
NewEdge Advisors, LLC3,854$26.2K<0.01%new13F-HR/ATimeline
MORGAN STANLEYin group MORGAN STANLEY3,493$23.8K<0.01%+45313F-HRTimelineGroup
FNY Investment Advisers, LLC3,200$21K0.01%-2,90013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,699$11K<0.01%-3,75013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,421$9.68K<0.01%+34913F-HRTimelineGroup
SIMPLEX TRADING, LLC1,393$9.49K<0.01%+1,30613F-HRTimeline
Avion Wealth246$1K<0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS50$340<0.01%013F-HRTimelineGroup
SBI Securities Co., Ltd.19$129<0.01%013F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/17$115<0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO8$49<0.01%-413F-HR/ATimelineGroup
Caitong International Asset Management …3$20<0.01%new13F-HRTimeline
DANSKE BANK A/S1$7<0.01%013F-HRTimeline