ARIMX AMG RR SMID VAL-I
FollowEquity Mutual Fu (fund)
6 managers (6 13F filers) reported a position in ARIMX shares at 2026-03-31, 3,106,134 shares in all. 1 filer opened a position and 0 filers sold out during the quarter.
- Managers
- 6
- 13F filers
- 6
- New
- 1
- Added
- 3
- Reduced
- 1
- Sold out
- 0
- Shares held by filers
- 3,106,134
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, Q1 2026
Filers in the available 13F reports with a share position at 2026-03-31, 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 | 1,830,975 | $17.9M | 1.44% | +13,886 | 13F-HRTimeline |
| Broderick Brian C | 673,406 | $6.59M | 1.21% | 0 | 13F-HRTimeline |
| SOMERVILLE KURT F | 260,567 | $2.55M | 0.67% | -5,278 | 13F-HRTimeline |
| Dempze Nancy E | 252,648 | $2.47M | 1.36% | +10,902 | 13F-HRTimeline |
| Elefante Mark B | 68,293 | $668K | 0.37% | +26,608 | 13F-HRTimeline |
| Delaney Dennis R | 20,245 | $198K | 0.07% | new | 13F-HRTimeline |