ATNM — ACTINIUM PHARMACEUTICALS INC
As of Q2 2026, 10 SEC-registered investment managers reported holding ATNM (ACTINIUM PHARMACEUTICALS INC) in their latest 13F filings, with a combined reported value of $1.94M across 1.98M shares. That is -16.7% by share count (-397.39K shares) versus the previous quarter, while reported value moved -18.0%. Ownership is concentrated: the five largest holders account for 94.7% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 1 opened new positions, 1 added to existing stakes, 7 trimmed, 4 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
ATNM is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Vanguard Group history | Q4 2025 | 1.42M | $1.93M | 0.00% | Add |
| Millennium Management history | Q2 2026 | 514.58K | $504.29K | 0.00% | Reduce |
| BlackRock Inc history | Q2 2026 | 395.90K | $387.98K | 0.00% | Add |
| Renaissance Technologies history | Q2 2026 | 380.49K | $372.88K | 0.00% | Reduce |
| Geode Capital Management history | Q2 2026 | 324.94K | $318.55K | 0.00% | Reduce |
| Two Sigma Investments history | Q2 2026 | 259.18K | $254.00K | 0.00% | Reduce |
| Invesco Ltd history | Q1 2025 | 153.56K | $247.22K | 0.00% | Add |
| D. E. Shaw & Co history | Q2 2024 | 29.34K | $217.09K | 0.00% | New |
| Deutsche Bank AG history | Q1 2025 | 123.13K | $198.25K | 0.00% | Hold |
| Charles Schwab Investment Management history | Q1 2025 | 97.60K | $157.14K | 0.00% | Add |
| Franklin Resources history | Q3 2022 | 20.71K | $153.00K | 0.00% | New |
| Wellington Management Group history | Q3 2024 | 59.61K | $112.06K | 0.00% | New |
| BNY Mellon history | Q1 2025 | 65.31K | $105.15K | 0.00% | Hold |
| Citadel Advisors history | Q1 2026 | 101.10K | $100.62K | 0.00% | Reduce |
| Royce & Associates history | Q3 2024 | 50.00K | $94.00K | 0.00% | Hold |
| Manulife Financial history | Q2 2024 | 12.49K | $92.41K | 0.00% | New |
| Goldman Sachs Group history | Q1 2026 | 70.24K | $69.91K | 0.00% | Hold |
| Northern Trust Corp history | Q2 2026 | 69.74K | $68.35K | 0.00% | Reduce |
| Marshall Wace history | Q3 2025 | 26.34K | $42.14K | 0.00% | Reduce |
| AQR Capital Management history | Q3 2025 | 16.80K | $26.89K | 0.00% | Reduce |
New Positions (Q2 2026)
- JPMorgan Chase & Co 1.49K sh · $1.48K
Fully Exited (vs previous quarter)
- Citadel Advisors sold 101.10K sh · $100.62K
- Goldman Sachs Group sold 70.24K sh · $69.91K
- Citigroup Inc sold 678 sh · $675
- Fidelity Management & Research (FMR) sold 79 sh · $79
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Millennium Management | — | — | — | 33.14K | 49.15K | 53.78K | 231.17K | — | — | — | 67.41K | 21.04K | 160.12K | 117.45K | — | 663.27K | 624.70K | 601.60K | 564.60K | 514.58K |
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 1.94M | 1.97M | 1.95M | 467.67K | 363.49K | 366.93K | 371.21K | 395.90K |
| Renaissance Technologies | — | — | — | 57.70K | 78.30K | 159.60K | 102.20K | 48.30K | — | — | — | 19.20K | 127.00K | 190.40K | 57.60K | 209.50K | 288.63K | 390.78K | 471.60K | 380.49K |
| Geode Capital Management | 167.17K | 167.17K | 167.17K | 172.22K | 214.17K | 231.69K | 232.43K | 521.38K | 542.44K | 569.55K | 595.72K | 666.31K | 686.15K | 687.85K | 711.80K | 329.69K | 328.42K | 328.99K | 336.07K | 324.94K |
| Two Sigma Investments | — | — | — | 57.22K | 15.83K | 213.32K | 45.54K | 19.47K | — | — | — | — | — | — | — | 46.55K | 234.29K | 209.69K | 337.17K | 259.18K |
| Northern Trust Corp | 38.33K | 37.99K | 37.37K | 38.05K | 39.23K | 44.78K | 44.56K | 219.34K | 220.38K | 226.39K | 230.60K | 228.46K | 240.12K | 251.93K | 228.27K | 59.99K | 35.90K | 42.61K | 75.86K | 69.74K |
| Wells Fargo & Co | 5.51K | 5.04K | 5.04K | 5.06K | 5.07K | 5.47K | 5.48K | 16.10K | 10.71K | 12.44K | 13.67K | 14.92K | 14.56K | 19.99K | 20.33K | 5.51K | 19.80K | 19.80K | 19.80K | 19.80K |
| UBS Group AG | 150 | 50 | — | 36 | 1.84K | 3.23K | 2.70K | — | 12.16K | 29.76K | 27.72K | 22.77K | 36.98K | 88.82K | 396.14K | 25.59K | 14.58K | 96 | 14.62K | 6.76K |
| Morgan Stanley | 43.97K | 30.57K | 20.41K | 48.66K | 50.17K | 40.47K | 99.89K | 59.87K | 48.29K | 99.55K | 70.66K | 93.95K | 113.69K | 216.13K | 65.76K | 44.70K | 4.72K | 19.07K | 13.60K | 6.34K |
| JPMorgan Chase & Co | — | — | — | — | — | — | — | 20.17K | 18.12K | 18.57K | 11.78K | 13.89K | 13.69K | 123.83K | 21.12K | 18.62K | 1.56K | 1.49K | — | 1.49K |
| Citadel Advisors | 168.60K | 136.20K | 588.47K | 313.27K | 221.41K | 278.62K | 181.23K | 282.57K | 152.79K | 86.51K | 167.12K | 121.98K | 86.92K | 50.30K | 47.40K | 94.21K | 151.72K | 114.70K | 101.10K | — |
| Point72 Asset Management | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10.29K | — | — |
| Fidelity Management & Research (FMR) | — | — | — | — | — | — | 14 | 280 | 3.14K | 2.93K | 2.90K | 5.90K | 8.51K | 4.74K | 12.58K | 24.32K | 21.10K | 14.37K | 79 | — |
| Goldman Sachs Group | — | — | — | — | 10.05K | 10.09K | 93.11K | 13.94K | 46.34K | 15.48K | 11.15K | 40.28K | 91.39K | 135.30K | 76.81K | 91.41K | — | 70.36K | 70.24K | — |
| AQR Capital Management | — | — | — | — | — | — | — | — | — | — | — | — | 359.35K | 16.70K | 63.25K | 77.22K | 16.80K | — | — | — |
| Bank of America Corp | 19.91K | 23.90K | 19.78K | 19.78K | 19.85K | 19.99K | 56.98K | 47.09K | 41.48K | 49.53K | 39.06K | 41.57K | 44.59K | 78.77K | 52.56K | 25.92K | 648 | 649 | — | — |
| Citigroup Inc | — | — | — | — | 7.63K | 49.15K | 49.81K | 7.75K | 20 | 3.93K | 4.65K | 6.60K | 21.75K | 25.31K | 22.69K | 15.12K | 1.28K | 431 | 678 | — |
| Marshall Wace | 22.47K | — | — | — | — | 22.46K | 74.36K | — | — | — | 152.47K | 256.03K | 32.93K | — | — | 98.12K | 26.34K | — | — | — |
| Vanguard Group | 866.73K | 865.59K | 858.84K | 1.07M | 1.07M | 1.12M | 1.28M | 1.33M | 1.34M | 1.36M | 1.45M | 1.48M | 1.62M | 1.62M | 1.57M | 1.37M | 1.38M | 1.42M | — | — |
| Deutsche Bank AG | — | — | — | — | — | — | — | 1.97K | 15.23K | 14.18K | 13.56K | 18.11K | 23.98K | 123.13K | 123.13K | — | — | — | — | — |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details