Adicet Bio, Inc. (ACET) has 20 known insider and institutional holders on record. The largest holder is ORBIMED ADVISORS LLC with 4,490,254 shares. Other notable holders include PureTech Health LLC and Schindel Yair Chaim.
Over the last 12 months, insiders have made 17 transactions in ACET stock — 12 buys (valued at $8.33M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
ACET Insider Ownership
Top Holder
ORBIMED ADVISORS LLC
4,490,254 shares
Buys (12 mo)
12
$8.33M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Orbimed Advisors Llc |
10 Percent Owner |
4,490,254 |
2025-10-10 |
|
| 2 |
Puretech Health Llc |
10 Percent Owner |
2,119,696 |
2019-12-19 |
|
| 3 |
Schindel Yair Chaim |
Director |
1,104,460 |
2020-09-17 |
|
| 4 |
Schor Chen |
President & CEO |
468,555 |
2026-03-27 |
|
| 5 |
Chimovits Erez |
10 Percent Owner |
396,657 |
2021-02-18 |
|
| 6 |
Galimi Francesco |
SVP & Chief Medical Officer |
375,077 |
2024-06-07 |
|
| 7 |
Mannick Joan |
Chief Medical Officer |
88,667 |
2019-12-06 |
|
| 8 |
Aftab Blake |
Chief Scientific Officer |
72,555 |
2026-03-27 |
|
| 9 |
Maltzman Julia D. |
Chief Medical Officer |
72,555 |
2026-03-27 |
|
| 10 |
Grissinger Michael |
Director |
70,200 |
2025-04-21 |
|
| 11 |
Borkowski Edward |
Chief Financial Officer |
60,000 |
2018-02-22 |
|
| 12 |
Healey Don |
Chief Technology Officer |
43,361 |
2026-03-27 |
|
| 13 |
Harvey Brian Nicholas |
Chief Financial Officer |
43,361 |
2026-03-27 |
|
| 14 |
Randall Richard P |
Director |
31,090 |
2013-12-06 |
|
| 15 |
Klickstein Lloyd |
Director |
26,400 |
2025-06-13 |
|
| 16 |
Manning Meredith |
Chief Commercial Officer |
26,000 |
2019-02-28 |
|
| 17 |
Dubin Steve |
Director |
22,700 |
2025-06-13 |
|
| 18 |
Giordano Natasha |
Director |
20,972 |
2017-12-11 |
|
| 19 |
Chodakewitz Jeffrey |
Director |
17,700 |
2025-06-13 |
|
| 20 |
Sinclair Andrew |
Director |
17,700 |
2025-06-13 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-25 |
Maltzman Julia D. |
Chief Medical Officer |
RSU Award |
72,555 |
$6.81 |
$494.1K |
| 2026-03-25 |
Aftab Blake |
Chief Scientific Officer |
RSU Award |
72,555 |
$6.81 |
$494.1K |
| 2026-03-25 |
Healey Don |
Chief Technology Officer |
RSU Award |
43,361 |
$6.81 |
$295.29K |
| 2026-03-25 |
Harvey Brian Nicholas |
Chief Financial Officer |
RSU Award |
43,361 |
$6.81 |
$295.29K |
| 2026-03-25 |
Schor Chen |
President & CEO |
RSU Award |
468,555 |
$6.81 |
$3.19M |
| 2026-01-24 |
Aftab Blake |
Chief Scientific Officer |
Tax Withholding of RSU |
535 |
$8.44 |
$4.52K |
| 2026-01-24 |
Healey Don |
Chief Technology Officer |
Tax Withholding of RSU |
535 |
$8.44 |
$4.52K |
| 2026-01-24 |
Harvey Brian Nicholas |
Chief Financial Officer |
Tax Withholding of RSU |
546 |
$8.44 |
$4.61K |
| 2026-01-24 |
Schor Chen |
President & CEO |
Tax Withholding of RSU |
1,755 |
$8.44 |
$14.81K |
| 2025-10-08 |
Orbimed Advisors Llc |
10 Percent Owner |
Informative Buy |
3,500,000 |
$1.00 |
$3.5M |
| 2025-06-11 |
Peng Katie |
Director |
RSU Award |
5,900 |
- |
- |
| 2025-06-11 |
Klickstein Lloyd |
Director |
RSU Award |
26,400 |
$0.78 |
$20.59K |
| 2025-06-11 |
Sinclair Andrew |
Director |
RSU Award |
5,900 |
- |
- |
| 2025-06-11 |
Chodakewitz Jeffrey |
Director |
RSU Award |
5,900 |
- |
- |
| 2025-06-11 |
Dubin Steve |
Director |
RSU Award |
5,900 |
- |
- |
| 2025-04-17 |
Grissinger Michael |
Director |
RSU Award |
70,200 |
$0.53 |
$36.91K |
| 2025-04-17 |
Grissinger Michael |
Officer |
Unknown |
- |
- |
- |
