Aktis Oncology, Inc. - AKTS
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MPM BioImpact LLC | History | New | 4,835,872 | 86,513 | 6.68% | — | 1 | +4,835,872 | New | Q1 2026 | May 15, 2026 |
| EcoR1 Capital, LLC | History | New | 4,824,469 | 86,309 | 3.66% | — | 2 | +4,824,469 | New | Q1 2026 | May 15, 2026 |
| Blue Owl Capital Holdings LP | History | New | 3,161,348 | 56,556 | 15.2% | — | 3 | +3,161,348 | New | Q1 2026 | May 14, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | History | New | 2,317,044 | 41,451 | 0.01% | — | 4 | +2,317,044 | New | Q1 2026 | May 15, 2026 |
| T. Rowe Price Investment Management, Inc. | History | New | 2,123,812 | 37,995 | 0.03% | — | 5 | +2,123,812 | New | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | New | 2,112,127 | 37,785 | 0.0% | — | 6 | +2,112,127 | New | Q1 2026 | May 13, 2026 |
| RTW INVESTMENTS, LP | History | New | 1,592,043 | 28,481 | 0.28% | — | 7 | +1,592,043 | New | Q1 2026 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | New | 1,564,196 | 27,985 | 0.0% | — | 8 | +1,564,196 | New | Q1 2026 | May 15, 2026 |
| RA CAPITAL MANAGEMENT, L.P. | History | New | 1,503,084 | 26,890 | 0.28% | — | 9 | +1,503,084 | New | Q1 2026 | May 15, 2026 |
| JANUS HENDERSON GROUP PLC | History | New | 1,454,267 | 26,022 | 0.01% | — | 10 | +1,454,267 | New | Q1 2026 | May 18, 2026 |
| BAKER BROS. ADVISORS LP | History | New | 996,351 | 17,824 | 0.1% | — | 11 | +996,351 | New | Q1 2026 | May 15, 2026 |
| Octagon Capital Advisors LP | History | New | 960,847 | 17,189 | 1.9% | — | 12 | +960,847 | New | Q1 2026 | May 15, 2026 |
| Merck & Co., Inc. | History | New | 952,844 | 17,046 | 4.88% | — | 13 | +952,844 | New | Q1 2026 | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 833,913 | 14,918 | 0.0% | — | 14 | +833,913 | New | Q1 2026 | May 15, 2026 |
| EVENTIDE ASSET MANAGEMENT, LLC | History | New | 507,000 | 9,070 | 0.15% | — | 15 | +507,000 | New | Q1 2026 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | New | 491,936 | 8,803 | 0.0% | — | 16 | +491,936 | New | Q1 2026 | May 15, 2026 |
| Avidity Partners Management LP | History | New | 468,566 | 8,785 | 1.99% | — | 17 | +468,566 | New | Q1 2026 | May 13, 2026 |
| STATE STREET CORP | History | New | 428,253 | 7,661 | 0.0% | — | 18 | +428,253 | New | Q1 2026 | May 15, 2026 |
| a16z Capital Management, L.L.C. | History | New | 415,000 | 7,424 | 0.58% | — | 19 | +415,000 | New | Q1 2026 | May 15, 2026 |
| FMR LLC | History | New | 386,379 | 6,912 | 0.0% | — | 20 | +386,379 | New | Q1 2026 | May 15, 2026 |
| UBS Group AG | History | New | 353,263 | 6,319 | 0.0% | — | 21 | +353,263 | New | Q1 2026 | May 05, 2026 |
| ArrowMark Colorado Holdings LLC | History | New | 329,471 | 5,894 | 0.16% | — | 22 | +329,471 | New | Q1 2026 | May 15, 2026 |
| Alyeska Investment Group, L.P. | History | New | 290,000 | 5,188 | 0.01% | — | 23 | +290,000 | New | Q1 2026 | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | New | 162,017 | 2,898 | 0.0% | — | 24 | +162,017 | New | Q1 2026 | May 15, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | History | New | 150,000 | 2,683 | 0.02% | — | 25 | +150,000 | New | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | New | 149,476 | 2,674 | 0.0% | — | 26 | +149,476 | New | Q1 2026 | May 14, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 127,395 | 2,279 | 0.0% | — | 27 | +127,395 | New | Q1 2026 | May 08, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | History | New | 120,322 | 2,152 | 0.0% | — | 28 | +120,322 | New | Q1 2026 | May 08, 2026 |
| AMERIPRISE FINANCIAL INC | History | New | 102,925 | 1,841 | 0.0% | — | 29 | +102,925 | New | Q1 2026 | May 15, 2026 |
| TD ASSET MANAGEMENT INC | History | New | 100,962 | 1,806 | 0.0% | — | 30 | +100,962 | New | Q1 2026 | May 11, 2026 |
| SOROS FUND MANAGEMENT LLC | History | New | 100,000 | 1,789 | 0.02% | — | 31 | +100,000 | New | Q1 2026 | May 15, 2026 |
| Laurion Capital Management LP | History | New | 100,000 | 1,789 | 0.08% | — | 32 | +100,000 | New | Q1 2026 | May 14, 2026 |
| Woodline Partners LP | History | New | 100,000 | 1,789 | 0.01% | — | 33 | +100,000 | New | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | New | 75,000 | 1,341 | 0.0% | — | 34 | +75,000 | New | Q1 2026 | May 15, 2026 |
| BANK OF AMERICA CORP /DE/ | History | New | 69,926 | 1,250 | 0.0% | — | 35 | +69,926 | New | Q1 2026 | May 15, 2026 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | History | New | 46,993 | 840 | 0.0% | — | 36 | +46,993 | New | Q1 2026 | May 15, 2026 |
| Bank of New York Mellon Corp | History | New | 42,901 | 767 | 0.0% | — | 37 | +42,901 | New | Q1 2026 | May 05, 2026 |
| MORGAN STANLEY | History | New | 30,723 | 549 | 0.0% | — | 38 | +30,723 | New | Q1 2026 | May 15, 2026 |
| GOLDMAN SACHS GROUP INC | History | New | 30,163 | 539 | 0.0% | — | 39 | +30,163 | New | Q1 2026 | May 15, 2026 |
| READYSTATE ASSET MANAGEMENT LP | History | New | 30,000 | 536 | 0.02% | — | 40 | +30,000 | New | Q1 2026 | May 15, 2026 |
| Ghisallo Capital Management LLC | History | New | 25,000 | 447 | 0.01% | — | 41 | +25,000 | New | Q1 2026 | May 15, 2026 |
| SEVEN GRAND MANAGERS, LLC | History | New | 25,000 | 447 | 0.03% | — | 42 | +25,000 | New | Q1 2026 | May 06, 2026 |
| Nuveen, LLC | History | New | 24,468 | 437 | 0.0% | — | 43 | +24,468 | New | Q1 2026 | Apr 30, 2026 |
| RHUMBLINE ADVISERS | History | New | 21,033 | 376 | 0.0% | — | 44 | +21,033 | New | Q1 2026 | May 12, 2026 |
| D. E. Shaw & Co., Inc. | History | New | 17,062 | 305 | 0.0% | — | 45 | +17,062 | New | Q1 2026 | May 15, 2026 |
| Zimmer Partners, LP | History | New | 15,000 | 268 | 0.01% | — | 46 | +15,000 | New | Q1 2026 | May 15, 2026 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | History | New | 14,185 | 253 | 0.0% | — | 47 | +14,185 | New | Q1 2026 | May 11, 2026 |
| DEUTSCHE BANK AG\ | History | New | 14,080 | 251 | 0.0% | — | 48 | +14,080 | New | Q1 2026 | May 06, 2026 |
| XTX Topco Ltd | History | New | 13,990 | 250 | 0.0% | — | 49 | +13,990 | New | Q1 2026 | May 15, 2026 |
| Invesco Ltd. | History | New | 12,113 | 216 | 0.0% | — | 50 | +12,113 | New | Q1 2026 | May 12, 2026 |
| MetLife Investment Management, LLC | History | New | 11,637 | 208 | 0.0% | — | 51 | +11,637 | New | Q1 2026 | May 14, 2026 |
| BARCLAYS PLC | History | New | 9,724 | 173 | 0.0% | — | 52 | +9,724 | New | Q1 2026 | May 14, 2026 |
| Vanguard Global Advisers, LLC | History | New | 9,689 | 173 | 0.0% | — | 53 | +9,689 | New | Q1 2026 | May 08, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | New | 9,651 | 172 | 0.0% | — | 54 | +9,651 | New | Q1 2026 | May 15, 2026 |
| JPMORGAN CHASE & CO | History | New | 8,355 | 138 | 0.0% | — | 55 | +8,355 | New | Q1 2026 | May 13, 2026 |
| WELLS FARGO & COMPANY/MN | History | New | 7,611 | 136 | 0.0% | — | 56 | +7,611 | New | Q1 2026 | Jul 08, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | New | 6,948 | 124 | 0.0% | — | 57 | +6,948 | New | Q1 2026 | May 08, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | New | 5,530 | 98 | 0.0% | — | 58 | +5,530 | New | Q1 2026 | Apr 29, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | New | 4,480 | 80 | 0.0% | — | 59 | +4,480 | New | Q1 2026 | May 12, 2026 |
| STRS OHIO | History | New | 3,600 | 64 | 0.0% | — | 60 | +3,600 | New | Q1 2026 | Apr 24, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | New | 3,200 | 57 | 0.0% | — | 61 | +3,200 | New | Q1 2026 | May 06, 2026 |
| Legal & General Group Plc | History | New | 1,826 | 32 | 0.0% | — | 62 | +1,826 | New | Q1 2026 | May 08, 2026 |
| Ameritas Investment Partners, Inc. | History | New | 1,683 | 30 | 0.0% | — | 63 | +1,683 | New | Q1 2026 | May 13, 2026 |
| Russell Investments Group, Ltd. | History | New | 1,551 | 27 | 0.0% | — | 64 | +1,551 | New | Q1 2026 | May 08, 2026 |
| CITIGROUP INC | History | New | 1,019 | 18 | 0.0% | — | 65 | +1,019 | New | Q1 2026 | May 11, 2026 |
| Tower Research Capital LLC (TRC) | History | New | 1,009 | 18 | 0.0% | — | 66 | +1,009 | New | Q1 2026 | May 15, 2026 |
| SALEM INVESTMENT COUNSELORS INC | History | New | 1,000 | 17 | 0.0% | — | 67 | +1,000 | New | Q1 2026 | Apr 29, 2026 |
| Sterling Capital Management LLC | History | New | 393 | 7 | 0.0% | — | 68 | +393 | New | Q1 2026 | Apr 22, 2026 |
| CWM, LLC | History | New | 21 | 0 | — | — | — | +21 | New | Q1 2026 | May 14, 2026 |