ACET Institutional Ownership
Who owns Adicet Bio, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 56 funds reported holding ACET at Jun 30, 2026, together owning 65.3% of the company.
- ▲32 buying vs 16 selling
- ▼Held by funds -3.2 pts
- ▲Funds holding +7
- ▲Superinvestors: 2 added, 0 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 56 | 49 | +14.3% |
| In funds' top 10 | 2 | 1 | +100.0% |
| 13F shares | 6.1M | 6.4M | −4.7% |
| Held by funds | 65.3% | 68.5% | −3.2 pts |
| New positions | 14 | 9 | +55.6% |
| Increased | 18 | 12 | +50.0% |
| Reduced | 9 | 9 | 0.0% |
| Sold out | 7 | 11 | −36.4% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ACET
All superinvestors →
Who owns ACET
share of fund held shares- Index and passive funds10.5%
- Active managers and hedge funds87.4%
- Banks and brokers2.1%
- Pensions, insurers and other0.0%
The top 10 holders own 71.4% of all ACET shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
3 funds changed their position- Vontobel Holding Ltd.Trimmed−1,001 sh
- Caitong International Asset Management Co., LtdTrimmed−19 sh
- SBI Securities Co., Ltd.Added+11 sh
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | RA Capital Management, L.P. | 9.96% | 933K | $8.1M | −250K |
| 2 | Orbimed Advisors LLC | 9.02% | 845K | $7.3M | −183K |
| 3 | Franklin Resources Inc | 6.69% | 627K | $5.4M | 0 |
| 4 | Citadel Advisors LLC | 4.62% | 433K | $3.7M | +51K |
| 5 | Vanguard Capital Management LLC | 3.67% | 343K | $3M | +6,704 |
| 6 | Adage Capital Partners Gp, L.l.c. | 2.93% | 274K | $2.4M | 0 |
| 7 | Renaissance Technologies LLC | 2.84% | 266K | $2.3M | +33K |
| 8 | Stonepine Capital Management, LLC | 2.62% | 246K | $2.1M | +24K |
| 9 | Alyeska Investment Group, L.P. | 2.18% | 204K | $1.8M | 0 |
| 10 | Schonfeld Strategic Advisors LLC | 2.09% | 196K | $1.7M | +196K |
- Schonfeld Strategic Advisors LLC+196K sh+$1.7M
- Bridgeway Capital Management, LLC+86K sh+$743K
- Marshall Wace, LLP+79K sh+$687K
- Regeneron Pharmaceuticals, Inc.+61K sh+$523K
- Two Sigma Investments, LP+54K sh+$464K
- Citadel Advisors LLC+51K sh+$440K
- Quadrature Capital Ltd+36K sh+$313K
- Trexquant Investment LP+34K sh+$297K
- RA Capital Management, L.P.−250K sh−$2.2M
- Woodline Partners LP−313K sh−$2.1M
- Prosight Management, LP−250K sh−$1.7M
- Orbimed Advisors LLC−183K sh−$1.6M
- Regeneron Pharmaceuticals, Inc.−61K sh−$412K
- ADAR1 Capital Management, LLC−54K sh−$367K
- Barclays PLC−25K sh−$170K
- UBS Group AG−8,551 sh−$74K
ACET institutional ownership FAQ
Who owns the most ACET stock?
In Q2 2026 13F filings the largest holder of ACET was RA Capital Management, L.P., followed by Orbimed Advisors LLC and Franklin Resources Inc. Index fund managers are usually the biggest holders of large companies.
What percentage of ACET is owned by institutions?
Funds that file 13F reports held 65.3% of ACET's shares at Jun 30, 2026, compared with 68.5% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ACET?
In Q2 2026, 32 funds bought ACET (14 of them new positions) and 16 sold (7 sold out completely). Among well known investors, 2 added and 0 cut. Our fund sentiment for ACET is bullish.
What is ACET's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this ACET ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.