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Disclosery

ACET ADICET BIO INC

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COM NEW (common), issuer CIK 1720580

54 managers (56 13F filers) reported a position in ACET shares at 2026-06-30, 6,109,856 shares in all. 14 filers opened a position and 6 filers sold out during the quarter.

Managers
54
13F filers
56
New
14
Added
18
Reduced
9
Sold out
6
Shares held by filers
6,109,856

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, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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.932,624$8.06M0.07%-250,00013F-HRTimelineGroup
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC844,787$7.3M0.14%-183,15713F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources626,571$5.41M<0.01%013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC432,738$3.74M<0.01%+50,91513F-HRTimelineGroup
VANGUARD GROUP INCgroup of 3 filers holding399,119$3.45M+7,040Timeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…274,375$2.37M<0.01%013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC265,945$2.3M<0.01%+33,35413F-HRTimeline
Stonepine Capital Management, LLC245,518$2.12M1.61%+23,56313F-HR/ATimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.203,799$1.76M<0.01%013F-HRTimelineGroup
Schonfeld Strategic Advisors LLC195,514$1.69M0.01%new13F-HRTimeline
Carlyle Group Inc.in group Carlyle Group Inc.184,295$1.59M0.02%013F-HRTimelineGroup
NEXTBio Capital Management LP157,827$1.36M0.63%013F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC124,832$1.08M<0.01%+6,69413F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP96,839$837K<0.01%+53,73313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC95,634$827K<0.01%-5,50113F-HRTimelineGroup
DAFNA Capital Management LLC93,812$811K0.15%013F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC85,959$743K0.01%new13F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP79,488$687K<0.01%new13F-HRTimelineGroup
Trexquant Investment LP78,002$674K<0.01%+34,33613F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC70,561$610K<0.01%+33,47713F-HRTimelineGroup
Burkehill Global Management, LP62,500$540K0.02%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.62,126$537K<0.01%+25,54113F-HRTimelineGroup
REGENERON PHARMACEUTICALS, INC.60,511$523K0.3%new13F-HRTimeline
Rangeley Capital, LLC50,892$440K0.41%-5,10813F-HRTimeline
RBF Capital, LLC38,582$333K0.01%013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP36,222$313K<0.01%013F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd36,193$313K<0.01%new13F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP31,603$273K<0.01%+20,82513F-HRTimelineGroup
UBS Group AGin group UBS Group AG29,817$258K<0.01%-8,55113F-HRTimelineGroup
Verdad Advisers, LP25,200$218K0.21%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd24,284$210K<0.01%+5,15813F-HRTimelineGroup
JOHNSON & JOHNSONin group JOHNSON & JOHNSON22,779$197K0.02%013F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…20,650$178K<0.01%new13F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC18,550$160K0.01%new13F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP18,436$159K<0.01%-76413F-HRTimelineGroup
OCCUDO QUANTITATIVE STRATEGIES LP16,636$144K0.01%+1,53613F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC15,254$132K<0.01%new13F-HRTimelineGroup
Vontobel Holding Ltd.in group Vontobel Holding Ltd.13,776$119K<0.01%-47113F-HRTimelineGroup
AXQ CAPITAL, LP10,991$95K0.01%new13F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC10,942$94.5K<0.01%new13F-HRTimelineGroup
Arax Advisory Partners6,000$51.8K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC4,814$41.6K<0.01%+3,42113F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY2,291$19.8K<0.01%-1,20213F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,701$15K<0.01%+213F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…277$2.39K<0.01%-1,14413F-HRTimelineGroup
Avion Wealth246$2K<0.01%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO196$1.68K<0.01%+18813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS50$432<0.01%013F-HRTimelineGroup
Caitong International Asset Management …47$406<0.01%+4413F-HRTimeline
SBI Securities Co., Ltd.24$207<0.01%+513F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/17$146<0.01%013F-HRTimelineGroup
FMR LLCin group FMR LLC6$52<0.01%new13F-HRTimelineGroup
TD Waterhouse Canada Inc.3$26<0.01%new13F-HRTimeline
DANSKE BANK A/S1$9<0.01%013F-HRTimeline