Actinium Pharmaceuticals
ATNM · NYSE American
$1.40+$0.08 (+6.06%)TodayMarket closed ·
Prev close $1.32
Who owns ATNM
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 14.6% of ATNM’s shares.
- Vanguard Capital Management, LLC3.9%
- Compass Financial Management LLC1.9%
- Millennium Management LLC1.6%
- Acadian Asset Management LLC1.6%
- Next 6 largest institutions5.5%
- All other shareholders85.4%
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Capital Management, LLC | 1.24M | 3.95% |
| Compass Financial Management LLC | 600.23K | 1.91% |
| Millennium Management LLC | 514.58K | 1.64% |
| Acadian Asset Management LLC | 496.29K | 1.58% |
| BlackRock Institutional Trust Company, N.A. | 389.97K | 1.24% |
| Renaissance Technologies LLC | 380.49K | 1.21% |
| Geode Capital Management, L.L.C. | 324.94K | 1.04% |
| Two Sigma Investments, LP | 259.18K | 0.83% |
| Seth (Sandesh) | 184.48K | 0.59% |
| Gagnon Securities LLC | 182.14K | 0.58% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 918.56K | 2.93% |
| Vanguard Extended Market Index Fund | 315.37K | 1.01% |
| Fidelity Extended Market Index Fund | 159.77K | 0.51% |
| iShares Micro-Cap ETF | 108.13K | 0.34% |
| Fidelity Total Market Index Fund | 52.29K | 0.17% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of ATNM in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| David Matthew T | Award | 250.00K | — |
| David Matthew T | Award | 250.00K | — |
| Nicholson, C. David | Award | 94.20K | — |
| Nicholson, C. David | Award | 62.80K | — |
| Shetty Ajit | Award | 92.40K | — |
| Shetty Ajit | Award | 61.60K | — |
| Almenoff June Sherie | Award | 27.00K | — |
| Almenoff June Sherie | Award | 18.00K | — |
| SETH SANDESH | Award | 1.13M | — |
| SETH SANDESH | Award | 1.03M | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 705.86K
- Days to cover
- 8.68
- % of shares outstanding
- 2.25%
- Average daily volume
- 81.29K
- Change since last report
- −0.3%
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