Adicet Bio, Inc. - ACET
Detailed investor-level table based on 13F positions.
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 |