Adicet Bio, Inc. - ACET

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
RA CAPITAL MANAGEMENT, L.P. History Added to 1,182,624 8,053 0.09% 0.08% 1 +234,375 24.72% Q1 2026 May 15, 2026
ORBIMED ADVISORS LLC History No change 1,027,944 7,000 0.14% 0.18% 2 0 0.0% Q1 2026 May 15, 2026
FRANKLIN RESOURCES INC History No change 626,571 4,266 0.0% 0.0% 3 0 0.0% Q1 2026 May 13, 2026
CITADEL ADVISORS LLC History Added to 381,823 2,600 0.0% 0.0% 4 +274,009 254.15% Q1 2026 May 15, 2026
VANGUARD GROUP INC History No change 291,277 2,452 0.0% 0.0% 5 0 0.0% Q4 2025 Jan 29, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 336,524 2,291 0.0% 6 +336,524 New Q1 2026 May 15, 2026
Woodline Partners LP History Reduced 313,124 2,132 0.01% 0.02% 7 -311,876 -49.9% Q1 2026 May 15, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C. History No change 274,375 1,868 0.0% 0.0% 8 0 0.0% Q1 2026 May 15, 2026
Prosight Management, LP History No change 250,244 1,704 0.28% 0.44% 9 0 0.0% Q1 2026 May 15, 2026
RENAISSANCE TECHNOLOGIES LLC History Reduced 232,591 1,583 0.0% 0.0% 10 -10,354 -4.26% Q1 2026 May 14, 2026
Stonepine Capital Management, LLC History Added to 221,955 1,511 0.61% 1.35% 11 +1,944 0.88% Q1 2026 May 14, 2026
Alyeska Investment Group, L.P. History No change 203,799 1,387 0.0% 0.0% 12 0 0.0% Q1 2026 May 15, 2026
Carlyle Group Inc. History No change 184,295 1,255 0.01% 0.01% 13 0 0.0% Q1 2026 May 08, 2026
NEXTBio Capital Management LP History No change 157,827 1,074 0.5% 0.78% 14 0 0.0% Q1 2026 May 14, 2026
TWO SIGMA ADVISERS, LP History No change 111,336 937 0.0% 0.0% 15 0 0.0% Q4 2025 Feb 17, 2026
ACADIAN ASSET MANAGEMENT LLC History Reduced 118,138 802 0.0% 0.0% 16 -63,257 -34.87% Q1 2026 May 13, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 101,135 689 0.0% 0.0% 17 +12,279 13.82% Q1 2026 May 15, 2026
DAFNA Capital Management LLC History No change 93,812 638 0.15% 0.18% 18 0 0.0% Q1 2026 May 15, 2026
Burkehill Global Management, LP History No change 62,500 425 0.02% 0.03% 19 0 0.0% Q1 2026 May 15, 2026
REGENERON PHARMACEUTICALS, INC. History No change 60,511 412 0.86% 1.51% 20 0 0.0% Q1 2026 May 08, 2026
Rangeley Capital, LLC History Added to 56,000 381 0.37% 0.17% 21 +30,999 123.99% Q1 2026 May 15, 2026
ADAR1 Capital Management, LLC History Reduced 53,827 366 0.02% 0.08% 22 -74,819 -58.16% Q1 2026 May 15, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History New 52,900 360 0.0% 23 +52,900 New Q1 2026 May 15, 2026
VANGUARD FIDUCIARY TRUST CO History New 50,334 342 0.0% 24 +50,334 New Q1 2026 May 08, 2026
Trexquant Investment LP History New 43,666 297 0.0% 25 +43,666 New Q1 2026 May 15, 2026
TWO SIGMA INVESTMENTS, LP History Reduced 43,106 293 0.0% 0.0% 26 -101,690 -70.23% Q1 2026 May 15, 2026
RBF Capital, LLC History No change 38,582 262 0.01% 0.01% 27 0 0.0% Q1 2026 May 18, 2026
UBS Group AG History Added to 38,368 261 0.0% 0.0% 28 +34,571 910.48% Q1 2026 May 05, 2026
JANE STREET GROUP, LLC History New 37,084 252 0.0% 29 +37,084 New Q1 2026 May 12, 2026
BlackRock, Inc. History No change 36,585 249 0.0% 0.0% 30 0 0.0% Q1 2026 May 13, 2026
STATE STREET CORP History Added to 36,222 246 0.0% 0.0% 31 +10,326 39.87% Q1 2026 May 15, 2026
BARCLAYS PLC History No change 25,000 170 0.0% 0.0% 32 0 0.0% Q1 2026 May 14, 2026
JOHNSON & JOHNSON History No change 22,779 155 0.02% 0.03% 33 0 0.0% Q1 2026 May 13, 2026
NORTHERN TRUST CORP History Added to 19,200 130 0.0% 0.0% 34 +5,133 36.49% Q1 2026 May 14, 2026
XTX Topco Ltd History Added to 19,126 130 0.0% 0.0% 35 +516 2.77% Q1 2026 May 15, 2026
OCCUDO QUANTITATIVE STRATEGIES LP History New 15,100 114 0.01% 36 +15,100 New Q1 2026 May 15, 2026
Vontobel Holding Ltd. History New 14,247 97 0.0% 37 +14,247 New Q1 2026 May 08, 2026
DIMENSIONAL FUND ADVISORS LP History New 10,778 73 0.0% 38 +10,778 New Q1 2026 May 07, 2026
Vanguard Global Advisers, LLC History New 5,221 35 0.0% 39 +5,221 New Q1 2026 May 08, 2026
MORGAN STANLEY History Added to 3,493 23 0.0% 0.0% 40 +453 14.9% Q1 2026 May 15, 2026
FNY Investment Advisers, LLC History Reduced 3,200 21 0.01% 0.01% 41 -2,900 -47.54% Q1 2026 Apr 15, 2026
ROYAL BANK OF CANADA History Reduced 1,699 11 0.0% 0.0% 42 -3,750 -68.82% Q1 2026 May 15, 2026
SIMPLEX TRADING, LLC History Added to 1,393 9 0.0% 43 +1,306 1501.15% Q1 2026 May 14, 2026
Tower Research Capital LLC (TRC) History Added to 1,421 9 0.0% 0.0% 44 +349 32.56% Q1 2026 May 15, 2026
Avion Wealth History New 246 1 0.0% 45 +246 New Q1 2026 May 01, 2026
GOLDMAN SACHS GROUP INC History Closed out 0 0 0.0% -234,510 -100.0% Q1 2026 May 15, 2026
LUMINUS MANAGEMENT LLC History Closed out 0 0 0.44% -59,558 -100.0% Q1 2026 May 15, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History Closed out 0 0 0.01% -56,350 -100.0% Q1 2026 May 15, 2026
Squarepoint Ops LLC History Closed out 0 0 0.0% -55,723 -100.0% Q1 2026 May 15, 2026
Maven Securities LTD History Closed out 0 0 0.01% -31,250 -100.0% Q1 2026 May 15, 2026
GSA CAPITAL PARTNERS LLP History Closed out 0 0 0.01% -17,763 -100.0% Q1 2026 May 08, 2026
TANG CAPITAL MANAGEMENT LLC History Closed out 0 0 0.0% -6,158 -100.0% Q1 2026 May 15, 2026
BANK OF AMERICA CORP /DE/ History Closed out 0 0 0.0% -1,288 -100.0% Q1 2026 May 15, 2026
HOLLENCREST CAPITAL MANAGEMENT History Closed out 0 0 0.0% -250 -100.0% Q1 2026 May 07, 2026
FMR LLC History Closed out 0 0 -34 -100.0% Q1 2026 May 15, 2026
NATIONAL BANK OF CANADA /FI/ History New 17 0 +17 New Q1 2026 May 14, 2026
JPMORGAN CHASE & CO History Reduced 8 0 -4 -33.33% Q1 2026 May 13, 2026
Caitong International Asset Management Co., Ltd History New 3 0 +3 New Q1 2026 May 11, 2026
DANSKE BANK A/S History No change 1 0 0 0.0% Q1 2026 May 12, 2026
BNP PARIBAS FINANCIAL MARKETS History No change 50 0 0 0.0% Q1 2026 May 12, 2026
SBI Securities Co., Ltd. History No change 19 0 0 0.0% Q1 2026 Apr 27, 2026