ATNMNYSEPharmaceutical PreparationsFiscal year ends December 31
Actinium Pharmaceuticals, Inc.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 7, 2026
$1.32+0.19 (+16.81%)
Close on Oct 19, 2026
- Market cap
- $41.46M
- P/E (TTM)
- 3.7
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
16.8%
5M of 31M shares
Institutional holders
47
6 new, 12 sold out
Net institutional buying
-0M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of ATNM | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 1,238,302 | 3.94% | $1.21M | −17,214 | 0.00% |
| Compass Financial Management LLC | 600,230 | 1.91% | $588.23K | New | 0.07% |
| Millennium Management LLC | 514,580 | 1.64% | $504.29K | −50,020 | 0.00% |
| Acadian Asset Management LLC | 496,288 | 1.58% | $485 | −104,531 | 0.00% |
| BlackRock, Inc. | 395,896 | 1.26% | $387.98K | +24,686 | 0.00% |
| Renaissance Technologies LLC | 380,491 | 1.21% | $372.88K | −91,109 | 0.00% |
| Geode Capital Management, LLC | 324,945 | 1.03% | $318.55K | −11,128 | 0.00% |
| Two Sigma Investments, LP | 259,179 | 0.82% | $254.00K | −77,989 | 0.00% |
| Gagnon Securities LLC | 182,142 | 0.58% | $178.50K | −19,158 | 0.03% |
| Vanguard Fiduciary Trust Co | 161,526 | 0.51% | $158.30K | +1,261 | 0.00% |
| State Street Corp | 122,215 | 0.39% | $119.77K | −4,000 | 0.00% |
| Gen-Wealth Partners Inc | 105,111 | 0.33% | $103.01K | −2,000 | 0.03% |
| Northern Trust Corp | 69,743 | 0.22% | $68.35K | −6,112 | 0.00% |
| Qube Research & Technologies Ltd | 57,812 | 0.18% | $56.66K | +39,764 | 0.00% |
| Susquehanna International Group, Llp | 56,822 | 0.18% | $55.69K | −67,176 | 0.00% |
| Vontobel Holding Ltd. | 50,000 | 0.16% | $49.00K | +20,000 | 0.00% |
| SNS Financial Group, LLC | 43,000 | 0.14% | $42.14K | New | 0.00% |
| Bridgeway Capital Management, LLC | 40,000 | 0.13% | $39.20K | – | 0.00% |
| Am Investment Strategies LLC | 29,356 | 0.09% | $29 | – | 0.00% |
| Gerald Baker Financial Group LLC | 22,691 | 0.07% | $22.24K | – | 0.01% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 47 | 5M | 16.8% | 6 / 6 | 20 / 12 | 1M | 1M |
| Q1 2026 | 54 | 5M | 16.9% | 7 / 12 | 14 / 12 | 2M | 1M |
| Q4 2025 | 60 | 5M | 17.2% | 9 / 13 | 19 / 8 | 1M | 0M |
| Q3 2025 | 61 | 5M | 16.4% | 9 / 9 | 29 / 10 | 1M | 1M |
| Q2 2025 | 63 | 5M | 17.4% | 19 / 11 | 22 / 25 | 2M | 4M |
| Q1 2025 | 69 | 8M | 26.1% | 10 / 24 | 17 / 9 | 1M | 1M |
| Q4 2024 | 69 | 8M | 25.9% | 14 / 27 | 14 / 17 | 1M | 1M |
| Q3 2024 | 72 | 8M | 26.9% | 17 / 24 | 19 / 18 | 4M | 1M |
| Q2 2024 | 74 | 7M | 23.1% | 19 / 27 | 17 / 11 | 1M | 1M |
| Q1 2024 | 67 | 7M | 21.9% | 13 / 19 | 17 / 4 | 1M | 0M |
| Q4 2023 | 59 | 6M | 18.7% | 7 / 18 | 18 / 6 | 0M | 0M |
| Q3 2023 | 58 | 6M | 18.3% | 4 / 21 | 11 / 16 | 0M | 1M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of ATNM | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 918,557 | 2.92% | $900.19K | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 315,369 | 1.00% | $309.06K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 171,447 | 0.55% | $216.02K | 0.00% | May 31, 2026 |
| iShares Micro-Cap ETF | 106,723 | 0.34% | $104.59K | 0.01% | Jun 30, 2026 |
| Fidelity Total Market Index Fund | 52,287 | 0.17% | $65.88K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 44,530 | 0.14% | $56.11K | 0.00% | May 31, 2026 |
| Ultra-Small Company Market Fund | 40,000 | 0.13% | $39.20K | 0.03% | Jun 30, 2026 |
| 1290 VT Micro Cap Portfolio | 5,849 | 0.02% | $5.73K | 0.00% | Jun 30, 2026 |
| Vanguard Balanced Index Fund | 4,376 | 0.01% | $4.29K | 0.00% | Jun 30, 2026 |
| Blackstone Alternative Multi-Strategy Fund | 3,114 | 0.01% | $3.05K | 0.00% | Jun 30, 2026 |
| Knights of Columbus U.S. ALL CAP INDEX FUND | 175 | 0.00% | $146 | 0.00% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Sandesh Seth | Chief Executive Officer, Director | 938,081 | 2.98% | Sep 4, 2026 |
| Steffen Wilhem Heeger | Chief Medical Officer | 153,868 | 0.49% | Sep 10, 2026 |
| Adeela Kamal | Chief Scientific Officer | 213,648 | 0.68% | Sep 10, 2026 |
| Steve O'Loughlin | Chief Financial Officer | 35,500 | 0.11% | Apr 2, 2025 |
| Richard I. Steinhart | Director | 63,116 | 0.20% | Sep 4, 2026 |
| Nicholson, C. David | Director | 63,300 | 0.20% | Sep 4, 2026 |
| June Sherie Almenoff | Director | 18,000 | 0.06% | Sep 4, 2026 |
| Ajit Shetty | Director | 62,357 | 0.20% | Sep 4, 2026 |
| Jeffrey W. Chell | Director | 61,600 | 0.20% | Sep 4, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Sandesh Seth Chief Executive Officer, Director | Sep 2, 2026 | Award | +753,600 | – | – | 938,081 |
| Sandesh Seth Chief Executive Officer, Director | Sep 2, 2026 | Award | +1,027,274 | – | – | 1,965,355 |
| June Sherie Almenoff Director | Sep 2, 2026 | Award | +18,000 | – | – | 18,000 |
| Nicholson, C. David Director | Sep 2, 2026 | Award | +62,800 | – | – | 63,300 |
| Richard I. Steinhart Director | Sep 2, 2026 | Award | +62,800 | – | – | 63,116 |
| Ajit Shetty Director | Sep 2, 2026 | Award | +61,600 | – | – | 62,357 |
| Jeffrey W. Chell Director | Sep 2, 2026 | Award | +61,600 | – | – | 61,600 |
| Sandesh Seth Chief Executive Officer, Director | Aug 18, 2025 | Tax withholding | −120,900 | $1.71 | $206.74K | 184,481 |
| Sandesh Seth Chief Executive Officer, Director | Aug 17, 2022 | Award | +300,000 | – | – | 305,381 |
| Mark Stanley Berger Chief Medical Officer | Mar 5, 2019 | Option exercise | +3,500 | $0.60 | $2.10K | 22,500 |
| Sandesh Seth Chairman & CEO, Director | Feb 21, 2019 | Option exercise | +8,125 | $0.60 | $4.88K | 161,458 |
| Sandesh Seth Chairman & CEO, Director | Dec 10, 2018 | Buy | +10,000 | $0.44 | $4.40K | 153,333 |
| Steve O'Loughlin Principal Financial Officer | Dec 10, 2018 | Buy | +10,000 | $0.44 | $4.40K | 35,500 |
| Dale L. Ludwig Chief Scientific Officer | Nov 19, 2018 | Buy | +10,000 | $0.45 | $4.50K | 10,000 |
| Sandesh Seth CEO, Director | Jul 17, 2018 | Buy | +10,000 | $0.79 | $7.90K | 143,333 |
| Steve O'Loughlin Principal Financial Officer | Jun 15, 2018 | Buy | +12,000 | $0.50 | $6.00K | 25,500 |
| Sandesh Seth Chairman & CEO, Director | Apr 19, 2018 | Buy | +5,000 | $0.38 | $1.90K | 133,333 |
| Mark Stanley Berger Chief Medical Officer | Mar 6, 2018 | Other | +14,000 | $0.50 | $7.00K | 19,000 |
| Nitya G. Ray Executive VP | Mar 6, 2018 | Other | +10,000 | $0.50 | $5.00K | 20,000 |
| Richard I. Steinhart Director | Mar 6, 2018 | Other | +7,000 | $0.50 | $3.50K | 9,500 |
| Steve O'Loughlin Principal Financial Officer | Mar 6, 2018 | Other | +10,000 | $0.50 | $5.00K | 13,500 |
| Sandesh Seth Chairman & CEO, Director | Mar 6, 2018 | Other | +52,500 | $0.50 | $26.25K | 128,333 |
| Ajit Shetty Director | Feb 28, 2018 | Buy | +22,730 | $0.43 | $9.77K | 22,730 |
| Nitya G. Ray Executive Vice President | Aug 2, 2017 | Buy | +10,000 | $0.75 | $7.50K | 10,000 |
| Sandesh Seth Chairman & CEO, Director | Aug 2, 2017 | Buy | +33,333 | $0.75 | $25.00K | 75,833 |
| Sandesh Seth Chairman and CEO, Director | Jun 15, 2017 | Buy | +2,500 | $1.17 | $2.93K | 37,500 |
| Sandesh Seth Chairman and CEO, Director | Jun 15, 2017 | Buy | +5,000 | $1.16 | $5.80K | 42,500 |
| Steve O'Loughlin Principal Financial Officer | Jun 15, 2017 | Buy | +3,500 | $1.17 | $4.10K | 3,500 |
| Mark Stanley Berger Chief Medical Officer | Jun 15, 2017 | Buy | +5,000 | $1.11 | $5.55K | 5,000 |
| Sandesh Seth Executive Chairman, Director | Dec 30, 2016 | Buy | +5,000 | $0.88 | $4.40K | 35,000 |
| Sandesh Seth Executive Chairman, Director | Dec 12, 2016 | Buy | +5,000 | $0.98 | $4.90K | 30,000 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −14,165 | $1.87 | $26.49K | 4,709,561 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −40,200 | $1.85 | $74.37K | 4,733,526 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −15,000 | $1.84 | $27.60K | 4,773,726 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −800 | $1.83 | $1.46K | 4,788,726 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −25,188 | $1.80 | $45.34K | 4,821,226 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −6,400 | $1.81 | $11.58K | 4,814,826 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −200 | $1.82 | $364 | 4,814,626 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −25,100 | $1.82 | $45.68K | 4,789,526 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 31, 2016 | Sale | −9,800 | $1.86 | $18.23K | 4,723,726 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 30, 2016 | Sale | −1,500 | $1.81 | $2.72K | 4,877,488 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 30, 2016 | Sale | −23,500 | $1.80 | $42.30K | 4,878,988 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 30, 2016 | Sale | −30,474 | $1.81 | $55.16K | 4,847,014 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 30, 2016 | Sale | −200 | $1.81 | $362 | 4,846,814 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 30, 2016 | Sale | −300 | $1.82 | $546 | 4,846,514 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 30, 2016 | Sale | −100 | $1.82 | $182 | 4,846,414 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 29, 2016 | Sale | −12,500 | $1.71 | $21.38K | 4,914,988 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 29, 2016 | Sale | −12,500 | $1.72 | $21.50K | 4,902,488 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 26, 2016 | Sale | −12,002 | $1.71 | $20.52K | 4,927,488 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 26, 2016 | Sale | −12,998 | $1.70 | $22.10K | 4,939,490 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 16, 2016 | Sale | −400 | $1.73 | $692 | 4,952,488 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 16, 2016 | Sale | −4,629 | $1.72 | $7.96K | 4,952,888 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Aug 15, 2016 | Sale | −4,439 | $1.72 | $7.64K | 4,957,517 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 12, 2016 | Sale | −100 | $1.81 | $181 | 4,961,956 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 12, 2016 | Sale | −3,000 | $1.80 | $5.40K | 4,962,056 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 11, 2016 | Sale | −800 | $1.80 | $1.44K | 4,965,056 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 8, 2016 | Sale | −21,190 | $1.80 | $38.14K | 4,965,856 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 6, 2016 | Sale | −10,500 | $1.80 | $18.90K | 4,987,046 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 5, 2016 | Sale | −4,340 | $1.83 | $7.94K | 4,997,546 |
| Sloan-Kettering Cancer Center Memorial 10% owner | Jul 5, 2016 | Sale | −6,000 | $1.82 | $10.92K | 5,001,886 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.