ACET Institutional Ownership & Shareholders
ADICET BIO INC (ACET) is currently held by 55 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $47.31M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Ra Capital Management, L.P. is currently the largest disclosed institutional shareholder of ACET tracked by InsiderSet, reporting ownership valued at approximately $8.06M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.98M, representing an estimated loss of -62.96% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 72% of the total disclosed ACET value among the investors covered in this analysis. Major shareholders include Ra Capital Management, L.P., Orbimed Advisors Llc, Citadel Advisors Llc, and several other long-term asset managers with concentrated positions in ADICET BIO INC (ACET).
This page ranks the largest institutional ACET shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
55
Total Reported Value
$47.31M
Largest Holder
Ra Capital Management, L.P.
Largest Position
$8.06M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
71
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 0.07% | 932,624 | $8,057,871 | $2,984,397 | -$5,073,474 | -62.96% | |
| Orbimed Advisors Llc | 0.14% | 844,787 | $7,298,960 | $2,703,318 | -$4,595,642 | -62.96% | |
| Citadel Advisors Llc | 0.00% | 432,738 | $3,738,856 | $1,384,762 | -$2,354,094 | -62.96% | |
| Vanguard Capital Management Llc | 0.00% | 343,228 | $2,965,490 | $1,098,330 | -$1,867,160 | -62.96% | |
| Adage Capital Partners Gp, L.L.C. | 0.00% | 274,375 | $2,370,600 | $878,000 | -$1,492,600 | -62.96% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 265,945 | $2,297,765 | $851,024 | -$1,446,741 | -62.96% |
| Stonepine Capital Management, Llc | 1.61% | 245,518 | $2,121,276 | $785,658 | -$1,335,618 | -62.96% | |
| Alyeska Investment Group, L.P. | 0.00% | 203,799 | $1,760,823 | $652,157 | -$1,108,666 | -62.96% | |
| Schonfeld Strategic Advisors Llc | 0.01% | 195,514 | $1,689,238 | $625,645 | -$1,063,593 | -62.96% | |
| Carlyle Group Inc. | 0.02% | 184,295 | $1,592,308 | $589,744 | -$1,002,564 | -62.96% | |
| Nextbio Capital Management Lp | 0.63% | 157,827 | $1,363,625 | $505,046 | -$858,579 | -62.96% | |
| Acadian Asset Management Llc | 0.00% | 124,832 | $1,076,000 | $399,462 | -$676,538 | -62.88% | |
| Two Sigma Investments, Lp | 0.00% | 96,839 | $836,689 | $309,885 | -$526,804 | -62.96% | |
| Geode Capital Management, Llc | 0.00% | 95,634 | $826,703 | $306,029 | -$520,674 | -62.98% | |
| Dafna Capital Management Llc | 0.15% | 93,812 | $810,536 | $300,198 | -$510,338 | -62.96% | |
| Bridgeway Capital Management, Llc | 0.01% | 85,959 | $742,686 | $275,069 | -$467,617 | -62.96% | |
| Marshall Wace, Llp | 0.00% | 79,488 | $686,775 | $254,362 | -$432,413 | -62.96% | |
| Trexquant Investment Lp | 0.00% | 78,002 | $673,937 | $249,606 | -$424,331 | -62.96% | |
| Jane Street Group, Llc | 0.00% | 70,561 | $609,647 | $225,795 | -$383,852 | -62.96% | |
| Burkehill Global Management, Lp | 0.02% | 62,500 | $540,000 | $200,000 | -$340,000 | -62.96% | |
| Blackrock, Inc. | 0.00% | 62,126 | $536,769 | $198,803 | -$337,966 | -62.96% | |
| Regeneron Pharmaceuticals, Inc. | 0.30% | 60,511 | $522,819 | $193,635 | -$329,184 | -62.96% | |
| Rangeley Capital, Llc | 0.41% | 50,892 | $439,707 | $162,854 | -$276,853 | -62.96% | |
| Vanguard Fiduciary Trust Co | 0.00% | 50,670 | $437,789 | $162,144 | -$275,645 | -62.96% | |
| Rbf Capital, Llc | 0.01% | 38,582 | $333,348 | $123,462 | -$209,886 | -62.96% | |
| State Street Corp | 0.00% | 36,222 | $312,958 | $115,910 | -$197,048 | -62.96% | |
| Quadrature Capital Ltd | 0.00% | 36,193 | $312,708 | $115,818 | -$196,890 | -62.96% | |
| Dimensional Fund Advisors Lp | 0.00% | 31,603 | $273,049 | $101,130 | -$171,919 | -62.96% | |
| Ubs Group Ag | 0.00% | 29,817 | $257,619 | $95,414 | -$162,205 | -62.96% | |
| Verdad Advisers, Lp | 0.21% | 25,200 | $217,728 | $80,640 | -$137,088 | -62.96% | |
| Xtx Topco Ltd | 0.00% | 24,284 | $209,814 | $77,709 | -$132,105 | -62.96% | |
| Susquehanna International Group, Llp | 0.00% | 20,650 | $178,416 | $66,080 | -$112,336 | -62.96% | |
| Johnson & Johnson | 0.02% | 22,779 | $162,642 | $72,893 | -$89,749 | -55.18% | |
| Prelude Capital Management, Llc | 0.01% | 18,550 | $160,272 | $59,360 | -$100,912 | -62.96% | |
| Northern Trust Corp | 0.00% | 18,436 | $159,287 | $58,995 | -$100,292 | -62.96% | |
| Occudo Quantitative Strategies Lp | 0.01% | 16,636 | $143,735 | $53,235 | -$90,500 | -62.96% | |
| Squarepoint Ops Llc | 0.00% | 15,254 | $131,795 | $48,813 | -$82,982 | -62.96% | |
| Axq Capital, Lp | 0.01% | 10,991 | $94,962 | $35,171 | -$59,791 | -62.96% | |
| Jump Financial, Llc | 0.00% | 10,942 | $94,539 | $35,014 | -$59,525 | -62.96% | |
| Vontobel Holding Ltd. | 0.00% | 12,775 | $91,214 | $40,880 | -$50,334 | -55.18% | |
| Arax Advisory Partners | 0.00% | 6,000 | $51,840 | $19,200 | -$32,640 | -62.96% | |
| Vanguard Global Advisers, Llc | 0.00% | 5,221 | $45,109 | $16,707 | -$28,402 | -62.96% | |
| Simplex Trading, Llc | 0.00% | 4,814 | $41,592 | $15,405 | -$26,187 | -62.96% | |
| Morgan Stanley | 0.00% | 2,291 | $19,795 | $7,331 | -$12,464 | -62.96% | |
| Royal Bank Of Canada | 0.00% | 1,701 | $15,000 | $5,443 | -$9,557 | -63.71% | |
| Tower Research Capital Llc (Trc) | 0.00% | 277 | $2,393 | $886 | -$1,507 | -62.96% | |
| Avion Wealth | 0.00% | 246 | $2,000 | $787 | -$1,213 | -60.64% | |
| Jpmorgan Chase & Co | 0.00% | 196 | $1,677 | $627 | -$1,050 | -62.60% | |
| Bnp Paribas Financial Markets | 0.00% | 50 | $432 | $160 | -$272 | -62.96% | |
| Sbi Securities Co., Ltd. | 0.00% | 35 | $250 | $112 | -$138 | -55.20% |
Frequently asked questions about ACET
Who are the largest institutional holders of ACET?
The largest institutional holders of ACET reported in the latest SEC Form 13F filings include Ra Capital Management, L.P., Orbimed Advisors Llc, Citadel Advisors Llc, Vanguard Capital Management Llc, and Adage Capital Partners Gp, L.L.C.. InsiderSet ranks institutional holders by their latest reported ACET position.
What is ACET institutional ownership?
This page tracks ACET positions reported by institutional investment managers through SEC Form 13F. ADICET BIO INC (ACET) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ACET?
InsiderSet currently tracks 55 institutional managers reporting ACET holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ACET shareholders.
How much ACET stock do institutions own?
Institutional investment managers disclosed approximately $47.31M in ACET holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ACET institutional ownership last updated?
The latest ACET institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ACET holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ACET position after the reporting date.
Are institutions buying or selling ACET?
Institutional buying and selling can be analyzed by comparing ACET positions across consecutive 13F reporting periods. InsiderSet's ACET Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ACET ownership changes.
How has ACET institutional ownership changed over time?
InsiderSet tracks ACET institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.