AKTS Aktis Oncology Inc.
Aktis Oncology Inc. (AKTS) Institutional Ownership
What the institutions did with AKTS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| MPM BIOIMPACT LLC | 4.8M | 14.2% |
| EcoR1 Capital, LLC | 4.8M | 14.1% |
| Blue Owl Capital Holdings LP | 3.1M | 9.0% |
| BlackRock, Inc. | 2.3M | 6.7% |
| T. Rowe Price Investment Management, Inc. | 2.1M | 6.0% |
| WELLINGTON MANAGEMENT GROUP LLP | 2.0M | 5.8% |
| RTW INVESTMENTS, LP | 1.6M | 4.7% |
| RA CAPITAL MANAGEMENT, L.P. | 1.3M | 3.8% |
| Jupiter Topco LLC | 1.3M | 3.8% |
| BAKER BROS. ADVISORS LP | 996.4K | 2.9% |
| Octagon Capital Advisors LP | 960.8K | 2.8% |
| Merck & Co., Inc. | 952.8K | 2.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 817.1K | 2.4% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 763.5K | 2.2% |
| TCG Crossover Management, LLC | 696.6K | 2.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 520.7K | 1.5% |
| EVENTIDE ASSET MANAGEMENT, LLC | 507.0K | 1.5% |
| Avidity Partners Management LP | 484.2K | 1.4% |
| STATE STREET CORP | 484.0K | 1.4% |
| a16z Capital Management, L.L.C. | 415.0K | 1.2% |
| Alyeska Investment Group, L.P. | 290.0K | 0.8% |
| FMR LLC | 285.6K | 0.8% |
| ArrowMark Colorado Holdings LLC | 245.9K | 0.7% |
| NORTHERN TRUST CORP | 180.6K | 0.5% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 166.8K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 1.6M | 763.5K | -800.7K |
| TCG Crossover Management, LLC | New | 0 | 696.6K | +696.6K |
| Avidity Partners Management LP | Reduced | 937.1K | 484.2K | -452.9K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 2.3M | 2.0M | -350.8K |
| UBS Group AG | Reduced | 353.3K | 100.0K | -253.3K |
| RA CAPITAL MANAGEMENT, L.P. | Reduced | 1.5M | 1.3M | -188.7K |
| BlackRock, Inc. | Increased | 2.1M | 2.3M | +166.2K |
| Driehaus Capital Management LLC | Sold Out | 150.0K | 0 | -150.0K |
| BARCLAYS PLC | Increased | 9.7K | 151.7K | +142.0K |
| FMR LLC | Reduced | 386.4K | 285.6K | -100.7K |
| Laurion Capital Management LP | Sold Out | 100.0K | 0 | -100.0K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 95.4K | +95.4K |
| Blue Owl Capital Holdings LP | Reduced | 3.2M | 3.1M | -91.1K |
| ArrowMark Colorado Holdings LLC | Reduced | 329.5K | 245.9K | -83.6K |
| AMERIPRISE FINANCIAL INC | Reduced | 102.9K | 20.0K | -82.9K |
| T. Rowe Price Investment Management, Inc. | Reduced | 2.1M | 2.1M | -72.4K |
| POLEN CAPITAL MANAGEMENT LLC | New | 0 | 63.5K | +63.5K |
| Tidal Investments LLC | New | 0 | 57.1K | +57.1K |
| STATE STREET CORP | Increased | 428.3K | 484.0K | +55.8K |
| RAYMOND JAMES FINANCIAL INC | New | 0 | 50.5K | +50.5K |
| CITADEL ADVISORS LLC | Reduced | 75.0K | 25.5K | -49.5K |
| AQR CAPITAL MANAGEMENT LLC | New | 0 | 48.1K | +48.1K |
| Quantinno Capital Management LP | New | 0 | 46.9K | +46.9K |
| GREAT LAKES ADVISORS, LLC | New | 0 | 43.6K | +43.6K |
| Mirador Capital Partners LP | New | 0 | 40.1K | +40.1K |
| Squarepoint Ops LLC | New | 0 | 38.4K | +38.4K |
| Jump Financial, LLC | New | 0 | 32.8K | +32.8K |
| Sofinnova Investments, Inc. | New | 0 | 32.4K | +32.4K |
| MORGAN STANLEY | Increased | 30.7K | 62.6K | +31.9K |
| NORTHERN TRUST CORP | Increased | 149.5K | 180.6K | +31.1K |
| TWO SIGMA INVESTMENTS, LP | New | 0 | 30.9K | +30.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 491.9K | 520.7K | +28.8K |
| Nuveen, LLC | Increased | 24.5K | 49.8K | +25.3K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 120.3K | 145.2K | +24.9K |
| TUDOR INVESTMENT CORP ET AL | New | 0 | 21.4K | +21.4K |
| WELLS FARGO & COMPANY/MN | Increased | 7.6K | 27.7K | +20.0K |
| Mariner, LLC | New | 0 | 17.8K | +17.8K |
| D. E. Shaw & Co., Inc. | Sold Out | 17.1K | 0 | -17.1K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 833.9K | 817.1K | -16.8K |
| SEI INVESTMENTS CO | New | 0 | 16.4K | +16.4K |
| Zimmer Partners, LP | Sold Out | 15.0K | 0 | -15.0K |
| Virtus Investment Advisers, LLC | New | 0 | 14.9K | +14.9K |
| LOS ANGELES CAPITAL MANAGEMENT LLC | New | 0 | 14.4K | +14.4K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | Sold Out | 14.2K | 0 | -14.2K |
| XTX Topco Ltd | Sold Out | 14.0K | 0 | -14.0K |
| CITIGROUP INC | Increased | 1.0K | 13.2K | +12.2K |
| Caprock Group, LLC | New | 0 | 9.9K | +9.9K |
| GOLDMAN SACHS GROUP INC | Reduced | 30.2K | 21.3K | -8.9K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | 0 | 8.6K | +8.6K |
| AXQ CAPITAL, LP | New | 0 | 7.0K | +7.0K |
| DEUTSCHE BANK AG\ | Increased | 14.1K | 21.0K | +6.9K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 127.4K | 133.8K | +6.4K |
| Bank of New York Mellon Corp | Increased | 42.9K | 49.3K | +6.3K |
| Russell Investments Group, Ltd. | Increased | 1.6K | 7.8K | +6.2K |
| RHUMBLINE ADVISERS | Increased | 21.0K | 26.9K | +5.9K |
| NBC SECURITIES, INC. | New | 0 | 5.4K | +5.4K |
| TD Asset Management Inc | Increased | 101.0K | 105.9K | +4.9K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 162.0K | 166.8K | +4.8K |
| NEW YORK STATE COMMON RETIREMENT FUND | Increased | 3.2K | 7.5K | +4.3K |
| SG Americas Securities, LLC | New | 0 | 3.4K | +3.4K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.