Latest Period
Q1 2026
Security Snapshot
Adicet Bio, Inc. - Common Stock, par value $0.0001 per share (ACET) Institutional Ownership
CUSIP: 007002207
13F Institutional Holders and Ownership History from Q4 2025 to Q1 2026
Institutions Reporting
47
Shares (Excl. Options)
6,346,044
Price
$6.81
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- Type / Class
- Equity / Common Stock, par value $0.0001 per share
- Symbol
- ACET on Nasdaq
- Shares outstanding
- 9,488,606
- Price per share
- $8.51
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 6,346,044
- Total reported value
- $43,223,564
- % of total 13F portfolios
- 0%
- Share change
- -415,469
- Value change
- -$3,740,582
- Number of holders
- 47
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- ACET - Adicet Bio, Inc. - Common Stock, par value $0.0001 per share is tracked under CUSIP 007002207.
- 47 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 48 to 47 between Q4 2025 and Q1 2026.
- Reported value moved from $56,073,864 to $43,223,564.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 47 institutions filings for Q1 2026.
Security key
007002207
Latest holder period
Q1 2026
13F holders
47
13D/G owners
4
CIK / CUSIP context first
Open Q1 2026 holders
ACET full holder history
Adicet Bio, Inc. SEC filings
Adicet Bio, Inc. company facts
Adicet Bio, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 007002207:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
ACET
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 12% | +24% | $8,834,201 | +$1,661,231 | 1,182,624 | +23% | RA Capital Management, L.P. | 17 Feb 2026 |
| FRANKLIN RESOURCES INC | 6.5% | $5,238,572 | 626,571 | Franklin Resources, Inc. | 31 Dec 2025 | |||
| Woodline Partners LP | 3.3% | -46% | $2,132,374 | -$2,123,876 | 313,124 | -50% | Woodline Partners LP | 31 Mar 2026 |
| TANG CAPITAL MANAGEMENT LLC | 0.1% | $51,050 | 6,158 | TANG CAPITAL MANAGEMENT, LLC | 31 Dec 2025 |
As of 31 Mar 2026, 47 institutional investors reported holding 6,346,044 shares of Adicet Bio, Inc. - Common Stock, par value $0.0001 per share (ACET). This represents 67% of the company’s total 9,488,606 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
65%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 12% | 1,182,624 | +25% | 0.09% | $8,053,669 |
| ORBIMED ADVISORS LLC | 11% | 1,027,944 | 0% | 0.16% | $7,000,299 |
| FRANKLIN RESOURCES INC | 6.6% | 626,571 | 0% | 0% | $4,266,949 |
| CITADEL ADVISORS LLC | 4% | 381,823 | +254% | 0% | $2,600,215 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.5% | 336,524 | 0% | 0% | $2,291,728 |
| Woodline Partners LP | 3.3% | 313,124 | -50% | 0.01% | $2,132,374 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2.9% | 274,375 | 0% | 0% | $1,868,494 |
| Prosight Management, LP | 2.6% | 250,244 | 0% | 0.28% | $1,704,162 |
| RENAISSANCE TECHNOLOGIES LLC | 2.5% | 232,591 | -4.3% | 0% | $1,583,945 |
| Stonepine Capital Management, LLC | 2.3% | 221,955 | +0.88% | 1.3% | $1,511,514 |
| Alyeska Investment Group, L.P. | 2.1% | 203,799 | 0% | 0% | $1,387,871 |
| Carlyle Group Inc. | 1.9% | 184,295 | 0% | 0.01% | $1,255,048 |
| NEXTBio Capital Management LP | 1.7% | 157,827 | 0% | 0.5% | $1,074,802 |
| ACADIAN ASSET MANAGEMENT LLC | 1.2% | 118,138 | -35% | 0% | $802,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.1% | 101,135 | +14% | 0% | $689,043 |
| DAFNA Capital Management LLC | 0.99% | 93,812 | 0% | 0.15% | $638,860 |
| Burkehill Global Management, LP | 0.66% | 62,500 | 0% | 0.02% | $425,625 |
| Rangeley Capital, LLC | 0.59% | 56,000 | +124% | 0.41% | $381,360 |
| ADAR1 Capital Management, LLC | 0.57% | 53,827 | -58% | 0.02% | $366,562 |
| VANGUARD FIDUCIARY TRUST CO | 0.53% | 50,334 | 0% | 0% | $342,775 |
| Trexquant Investment LP | 0.46% | 43,666 | 0% | $297,365 | |
| TWO SIGMA INVESTMENTS, LP | 0.45% | 43,106 | -70% | 0% | $293,552 |
| RBF Capital, LLC | 0.41% | 38,582 | 0% | 0.01% | $262,743 |
| UBS Group AG | 0.4% | 38,368 | +910% | 0% | $261,286 |
| JANE STREET GROUP, LLC | 0.39% | 37,084 | 0% | $252,542 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
2
Latest
Q1 2026