ACTINIUM PHARMACEUTICALS INC (ATNM): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in ATNM · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
5
13F filers
Aggregate Value
$1.2M
Across holders
Last Price
$1.05
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity1 increased3 reduced0 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 515K | $504K | 42.3% | 0.0% | Reduced | $-49K | Q2 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 380K | $373K | 31.3% | 0.0% | Reduced | $-89K | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 259K | $254K | 21.3% | 0.0% | Reduced | $-76K | Q2 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 58K | $57K | 4.8% | 0.0% | Added | +$39K | Q2 2026 |
| Rockefeller Capital Management L.P. CIK 0001739439 | Hedge Fund | 4K | $4K | 0.3% | 0.0% | Unchanged | +$0 | Q2 2026 |
Reduced
Hedge Fund
$504K· 42.3% of total· 0.0% port· 515K sh· $-49K QoQ· Q2 2026
Reduced
Hedge Fund
$373K· 31.3% of total· 0.0% port· 380K sh· $-89K QoQ· Q2 2026
Reduced
Hedge Fund
$254K· 21.3% of total· 0.0% port· 259K sh· $-76K QoQ· Q2 2026
Added
Hedge Fund
$57K· 4.8% of total· 0.0% port· 58K sh· +$39K QoQ· Q2 2026
Unchanged
Hedge Fund
$4K· 0.3% of total· 0.0% port· 4K sh· +$0 QoQ· Q2 2026
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