Who owns ARIMX?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.
Institutional ownership of ARIMX from SEC Form 13F filings across 5 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 5 institutions disclosed 1.3M shares of ARIMX worth $13.7M; the largest disclosed holder is Broderick Brian C. Source: SEC Form 13F filings, parsed by EvidInvest.
5
13F holders
$13.7M
value, 2026 filers
1.3M
shares disclosed
0
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ARIMX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Broderick Brian C | 673,406 | $7.1M | 1.1% | — | 0.0% |
| 2 | SOMERVILLE KURT F | 259,951 | $2.7M | 0.7% | — | -0.2% |
| 3 | Dempze Nancy E | 252,648 | $2.7M | 1.3% | — | 0.0% |
| 4 | Elefante Mark B | 78,815 | $832,293 | 0.4% | — | +15.4% |
| 5 | Delaney Dennis R | 36,219 | $382,470 | 0.1% | — | +78.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.