Aktis OncologyAKTS
13F holders, Q2 2026 (June 30)113holders +44
50new positions
6sold out
5famous investors
$32.23avg. 13F price*
At the end of Q2 2026, 113 institutions reported holding Aktis Oncology Inc. (AKTS) in their 13F filings, up 44 from Q1 2026. 50 opened new positions and 6 sold out. The largest holders were MPM Bioimpact LLC ($155.9M), EcoR1 Capital, LLC ($155.5M) and Blue Owl Capital Holdings LP ($99.0M). 5 famous investors held it, including George Soros (0.1% of Soros Fund Management's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio).
- Company
- Aktis Oncology Inc.
- CUSIP
- 01021M104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 50 | $45.2M |
| Exits | 6 | $5.6M |
All 13F filers, Q1 2026 → Q2 2026: 2,012,984 shares bought and 2,415,188 shares sold, net −402,204 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 113 holders
| MPM Bioimpact LLC | 9.50% | No change | 4,835,872 | $155.9M |
| EcoR1 Capital, LLC | 7.71% | No change | 4,824,469 | $155.5M |
| Blue Owl Capital Holdings LP | 15.07% | Reduce -2.9% | 3,070,219 | $99.0M |
| BlackRock, Inc. | 0.00% | Add +7.9% | 2,278,358 | $73.4M |
| T. Rowe Price Investment Management, Inc. | 0.04% | Reduce -3.4% | 2,051,447 | $66.1M |
| Wellington Management Group LLP | 0.01% | Reduce -15.1% | 1,966,244 | $63.4M |
| RTW Investments, LP | 0.44% | No change | 1,592,043 | $51.3M |
| Ra Capital Management, L.P. | 0.37% | Reduce -12.6% | 1,314,405 | $42.4M |
| Jupiter Topco LLC | 0.02% | — | 1,314,267 | $42.4M |
| Baker Bros. Advisors LP | 0.16% | No change | 996,351 | $32.1M |
| Octagon Capital Advisors LP | 2.84% | No change | 960,847 | $31.0M |
| Merck & Co., Inc. | 5.83% | No change | 952,844 | $30.7M |
| Vanguard Capital Management LLC | 0.00% | Reduce -2.0% | 817,075 | $26.3M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -51.2% | 763,499 | $24.6M |
| TCG Crossover Management, LLC | 0.54% | New | 696,560 | $22.5M |
| Geode Capital Management, LLC | 0.00% | Add +5.8% | 520,737 | $16.8M |
| Eventide Asset Management, LLC | 0.22% | No change | 507,000 | $16.3M |
| Avidity Partners Management LP | 2.50% | Add +3.3% | 484,200 | $15.6M |
| State Street Corp. | 0.00% | Add +13.0% | 484,010 | $15.6M |
| a16z Capital Management, L.L.C. | 0.09% | No change | 415,000 | $13.4M |
| Alyeska Investment Group, L.P. | 0.02% | No change | 290,000 | $9.3M |
| FMR LLC | 0.00% | Reduce -26.1% | 285,631 | $9.2M |
| ArrowMark Colorado Holdings LLC | 0.33% | Reduce -25.4% | 245,872 | $7.9M |
| Northern Trust Corp. | 0.00% | Add +20.8% | 180,575 | $5.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +3.0% | 166,842 | $5.4M |
| Barclays PLC | 0.00% | Add +1460.0% | 151,696 | $4.9M |
| Vanguard Portfolio Management LLC | 0.00% | Add +20.7% | 145,220 | $4.7M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +5.0% | 133,834 | $4.3M |
| TD Asset Management Inc | 0.00% | Add +4.9% | 105,902 | $3.4M |
| Soros Fund Management | 0.06% | No change | 100,000 | $3.2M |
| Woodline Partners LP | 0.01% | No change | 100,000 | $3.2M |
| UBS Group AG | 0.00% | Reduce -71.7% | 99,960 | $3.2M |
| Renaissance Technologies | 0.00% | New | 95,400 | $3.1M |
| Bank of America Corp. | 0.00% | Add +4.2% | 72,835 | $2.3M |
| Polen Capital Management LLC | 0.02% | New | 63,514 | $2.0M |
| Morgan Stanley | 0.00% | Add +103.9% | 62,636 | $2.0M |
| Tidal Investments LLC | 0.00% | New | 57,059 | $1.8M |
| Raymond James Financial Inc. | 0.00% | New | 50,464 | $1.6M |
| Nuveen, LLC | 0.00% | Add +103.6% | 49,816 | $1.6M |
| Bank of New York Mellon Corp | 0.00% | Add +14.8% | 49,250 | $1.6M |
| AQR Capital Management | 0.00% | New | 48,123 | $1.6M |
| Manufacturers Life Insurance Company, The | 0.00% | Add +2.2% | 48,044 | $1.5M |
| Quantinno Capital Management LP | 0.00% | New | 46,887 | $1.5M |
| Great Lakes Advisors, LLC | 0.01% | New | 43,612 | $1.4M |
| Mirador Capital Partners LP | 0.16% | New | 40,124 | $1.3M |
| Squarepoint Ops LLC | 0.00% | New | 38,381 | $1.2M |
| Jump Financial, LLC | 0.01% | New | 32,779 | $1.1M |
| Sofinnova Investments, Inc. | 0.06% | New | 32,436 | $1.0M |
| Two Sigma Investments, LP | 0.00% | New | 30,914 | $996K |
| Readystate Asset Management LP | 0.06% | No change | 30,000 | $967K |
| Wells Fargo & Company | 0.00% | Add +263.4% | 27,659 | $891K |
| Rhumbline Advisers | 0.00% | Add +28.1% | 26,945 | $868K |
| Citadel Advisors | 0.00% | Reduce -66.0% | 25,537 | $823K |
| Seven Grand Managers, LLC | 0.03% | No change | 25,000 | $806K |
| Ghisallo Capital Management LLC | 0.02% | No change | 25,000 | $806K |
| Tudor Investment Corporation | 0.00% | New | 21,402 | $690K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -29.5% | 21,278 | $686K |
| Deutsche Bank AG | 0.00% | Add +49.3% | 21,022 | $678K |
| Ameriprise Financial Inc. | 0.00% | Reduce -80.6% | 20,000 | $645K |
| Mariner, LLC | 0.00% | New | 17,770 | $573K |
| Sei Investments Co. | 0.00% | New | 16,402 | $529K |
| Virtus Investment Advisers, LLC | 0.11% | New | 14,920 | $481K |
| Invesco Ltd. | 0.00% | Add +23.1% | 14,908 | $480K |
| Los Angeles Capital Management LLC | 0.00% | New | 14,379 | $463K |
| Citigroup Inc. | 0.00% | Add +1193.1% | 13,177 | $425K |
| MetLife Investment Management, LLC | 0.00% | Add +11.7% | 12,994 | $419K |
| Caprock Group, LLC | 0.01% | New | 9,908 | $319K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +1.2% | 9,769 | $315K |
| Susquehanna International Group, LLP | 0.00% | New | 8,623 | $278K |
| JPMorgan Chase & Co. | 0.00% | Add +5.8% | 8,835 | $266K |
| Russell Investments Group, Ltd. | 0.00% | Add +399.9% | 7,754 | $250K |
| New York State Common Retirement Fund | 0.00% | Add +134.4% | 7,500 | $242K |
| Axq Capital, LP | 0.02% | New | 7,020 | $226K |
| Vanguard Global Advisers, LLC | 0.00% | Reduce -28.9% | 6,886 | $222K |
| PNC Financial Services Group, Inc. | 0.00% | Reduce -11.6% | 6,140 | $198K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 5,530 | $178K |
| Lanark Financial, Inc. | 0.01% | New | 5,358 | $173K |
| SG Americas Securities, LLC | 0.00% | New | 3,368 | $109K |
| BNP Paribas Financial Markets | 0.00% | Reduce -26.8% | 3,280 | $106K |
| STRS Ohio | 0.00% | Reduce -13.9% | 3,100 | $100K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +124.8% | 2,268 | $73K |
| Pinnacle Wealth Planning Services, Inc. | 0.01% | New | 2,267 | $73K |
| Legal & General Group Plc | 0.00% | Add +12.9% | 2,062 | $67K |
| Ameritas Investment Partners, Inc. | 0.00% | Add +14.4% | 1,925 | $62K |
| Salem Investment Counselors Inc. | 0.00% | No change | 1,000 | $32K |
| State of Wyoming | 0.00% | New | 985 | $32K |
| Royal Bank of Canada | 0.00% | New | 797 | $25K |
| National Bank of Canada | 0.00% | New | 700 | $23K |
| Fifth Third Bancorp | 0.00% | New | 576 | $19K |
| Rockefeller Capital Management L.P. | 0.00% | New | 397 | $13K |
| Global Retirement Partners, LLC | 0.00% | — | 395 | $13K |
| Arax Advisory Partners | 0.00% | New | 385 | $12K |
| California State Teachers Retirement System | 0.00% | New | 288 | $9K |
| Federation des caisses Desjardins du Quebec | 0.00% | New | 250 | $8K |
| Sterling Capital Management LLC | 0.00% | Reduce -53.2% | 184 | $6K |
| Allworth Financial LP | 0.00% | New | 124 | $4K |
| IFP Advisors, Inc | 0.00% | New | 101 | $3K |
| EverSource Wealth Advisors, LLC | 0.00% | New | 80 | $3K |
| Farther Finance Advisors, LLC | 0.00% | New | 77 | $2K |
| HM Payson & Co. | 0.00% | New | 74 | $2K |
"% of holder's portfolio" is AKTS's weight in each manager's 13F, not the share of Aktis Oncology Inc. the manager owns.