ARIMX AMG RR SMID VAL-I
FollowEquity Mutual Fu (fund)
5 managers (5 13F filers) reported a position in ARIMX shares at 2025-09-30, 3,036,093 shares in all. 0 filers opened a position and 0 filers sold out during the quarter.
- Managers
- 5
- 13F filers
- 5
- New
- 0
- Added
- 2
- Reduced
- 2
- Sold out
- 0
- Shares held by filers
- 3,036,093
Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.
13D and 13G filers
No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.
Insider trades
No Form 4 transaction on this security in the data.
13F holders, Q3 2025
Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.
| Holder | Shares | Value | % of portfolio | Change | Source |
|---|---|---|---|---|---|
| Hemenway Trust Co LLC | 1,818,002 | $18.6M | 1.42% | -123,495 | 13F-HRTimeline |
| Broderick Brian C | 673,406 | $6.9M | 1.31% | 0 | 13F-HRTimeline |
| SOMERVILLE KURT F | 265,845 | $2.72M | 0.45% | -10,289 | 13F-HRTimeline |
| Dempze Nancy E | 237,255 | $2.43M | 1.33% | +3,969 | 13F-HRTimeline |
| Elefante Mark B | 41,585 | $426K | 0.27% | +11,244 | 13F-HRTimeline |