ACTINIUM PHARMACEUTICALS INC (ATNM) Institutional Ownership Changes & 13F Activity
ACTINIUM PHARMACEUTICALS INC (ATNM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Millennium Management Llc, Two Sigma Investments, Lp, Gagnon Securities Llc, Two Sigma Advisers, Lp, and State Street Corp.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Millennium Management Llc | Buy | +601,600 | — | 601,600 | $818.18K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Investments, Lp | Buy | +209,692 | — | 209,692 | $285.18K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Advisers, Lp | Buy | +196,076 | — | 196,076 | $266.66K | Q4 2025 | Feb 17, 2026 |
| Susquehanna International Group, Llp | Buy | +82,474 | — | 82,474 | $112.17K | Q4 2025 | Feb 17, 2026 |
| Northern Trust Corp | Buy | +42,610 | — | 42,610 | $57.95K | Q4 2025 | Feb 17, 2026 |
| Bridgeway Capital Management, Llc | Buy | +40,000 | — | 40,000 | $54.40K | Q4 2025 | Feb 17, 2026 |
| Xtx Topco Ltd | Buy | +25,976 | — | 25,976 | $35.33K | Q4 2025 | Feb 17, 2026 |
| Osaic Holdings, Inc. | Buy | +20,265 | — | 20,265 | $27.56K | Q4 2025 | Feb 17, 2026 |
| Qube Research & Technologies Ltd | Buy | +18,812 | — | 18,812 | $25.58K | Q4 2025 | Feb 17, 2026 |
| Cetera Investment Advisers | Buy | +15,259 | — | 15,259 | $20.75K | Q4 2025 | Feb 17, 2026 |
| Fmr Llc | Buy | +14,373 | — | 14,373 | $19.55K | Q4 2025 | Feb 17, 2026 |
| Russell Investments Group, Ltd. | Buy | +13,340 | — | 13,340 | $18.14K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Securities, Llc | Buy | +12,965 | — | 12,965 | $17.63K | Q4 2025 | Feb 17, 2026 |
| Point72 Asset Management, L.P. | Buy | +10,295 | — | 10,295 | $14.00K | Q4 2025 | Feb 17, 2026 |
| Rockefeller Capital Management L.P. | Buy | +4,000 | — | 4,000 | $5.44K | Q4 2025 | Feb 17, 2026 |
| National Bank Of Canada | Buy | +855 | — | 855 | $1.16K | Q4 2025 | Feb 17, 2026 |
| Bank Of America Corp | Buy | +649 | — | 649 | $882.00 | Q4 2025 | Feb 17, 2026 |
| Jones Financial Companies Lllp | Buy | +351 | — | 351 | $477.00 | Q4 2025 | Feb 17, 2026 |
| Royal Bank Of Canada | Buy | +80 | — | 80 | $0.00 | Q4 2025 | Feb 17, 2026 |
| Gagnon Securities Llc | Buy | +201,807 | — | 201,807 | $274.46K | Q4 2025 | Feb 13, 2026 |
| State Street Corp | Buy | +126,215 | — | 126,215 | $171.65K | Q4 2025 | Feb 13, 2026 |
| Gen-Wealth Partners Inc | Buy | +107,131 | — | 107,131 | $145.70K | Q4 2025 | Feb 13, 2026 |
| Squarepoint Ops Llc | Buy | +65,730 | — | 65,730 | $89.39K | Q4 2025 | Feb 13, 2026 |
| Vontobel Holding Ltd. | Buy | +30,000 | — | 30,000 | $40.80K | Q4 2025 | Feb 13, 2026 |
| Wells Fargo & Company/Mn | Buy | +19,800 | — | 19,800 | $26.93K | Q4 2025 | Feb 13, 2026 |
| Morgan Stanley | Buy | +19,070 | — | 19,070 | $25.93K | Q4 2025 | Feb 13, 2026 |
| Intrepid Financial Planning Group Llc | Buy | +10,500 | — | 10,500 | $14.28K | Q4 2025 | Feb 13, 2026 |
| Level Four Advisory Services, Llc | Buy | +10,000 | — | 10,000 | $13.60K | Q4 2025 | Feb 13, 2026 |
| Arax Advisory Partners | Buy | +707 | — | 707 | $962.00 | Q4 2025 | Feb 13, 2026 |
| Citigroup Inc | Buy | +431 | — | 431 | $586.00 | Q4 2025 | Feb 13, 2026 |
Frequently asked questions about ATNM activity
Which institutional owners are buying ATNM?
Institutional owners buying ATNM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in ATNM activity?
"Buy" means an investor increased their reported position in ATNM compared to the prior reporting period. This reflects growing exposure to ACTINIUM PHARMACEUTICALS INC (ATNM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in ATNM increasing?
Institutional interest in ATNM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related ATNM Institutional Insights
- ATNM Overview
- ATNM 13F Institutional Holders
- ATNM Superinvestors
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- ATNM Insider Trading & SEC Form 4 Activity
- ATNM Articles
- Top Institutional Investor Stock Rankings