AKTIS ONCOLOGY INC AKTS
COM · Common Stock · CUSIP 01021M104
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersBoston, MA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($10.1k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $32.23.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q1 2026 | 69 |
| Q2 2026 | 114 |
Biggest buyers
| TCG Crossover Management, LLC | New | +696.6k |
| BlackRock, Inc. | Added | +166.2k |
| BARCLAYS PLC | Added | +142.0k |
| RENAISSANCE TECHNOLOGIES LLC | New | +95.4k |
| POLEN CAPITAL MANAGEMENT LLC | New | +63.5k |
| Tidal Investments LLC | New | +57.1k |
| STATE STREET CORP | Added | +55.8k |
| RAYMOND JAMES FINANCIAL INC | New | +50.5k |
| AQR CAPITAL MANAGEMENT LLC | New | +48.1k |
| Quantinno Capital Management LP | New | +46.9k |
Biggest sellers
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -800.7k |
| Avidity Partners Management LP | Reduced | -452.9k |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -350.8k |
| UBS Group AG | Reduced | -253.3k |
| RA CAPITAL MANAGEMENT, L.P. | Reduced | -188.7k |
| Driehaus Capital Management LLC | Sold out | -150.0k |
| FMR LLC | Reduced | -100.7k |
| Laurion Capital Management LP | Sold out | -100.0k |
| Blue Owl Capital Holdings LP | Reduced | -91.1k |
| ArrowMark Colorado Holdings LLC | Reduced | -83.6k |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
VV Manager II, LLC
13D · may seek influence
new · filed 2026-01-14
Stated purposeThe information set forth in Item 3 of this Statement is incorporated herein by reference. The Reporting Persons hold the securities of the Issuer for general investment purposes. The Reporting Persons may, from time to time, depending on prevailing market, economic and other conditions, acquire additional shares of Common Stock or other securities of the Issuer, dispose of any such securities, or engage in discussions with the Issuer concerning such acquisitions or dispositions or further investments in the Issuer. The Reporting Persons intend to review their investment in the Issuer on a continuing basis and, depending upon the price and availability of shares of Common Stock or other securities of the Issuer, subsequent developments affecting the Issuer, the Issuer's business and prospe… Full filing |
10.9% |
EcoR1 Capital, LLC
13D · may seek influence
new · filed 2026-01-20
Stated purposeOleg Nodelman, the manager of EcoR1, is a member of the Issuer's board of directors. The reporting persons acquired securities of the Issuer for investment purposes based on their belief that the Issuer's securities represented an attractive investment opportunity. The reporting persons will routinely monitor the Issuer regarding a wide variety of factors that affect their investment considerations, including, current and anticipated future trading prices of the Common Stock and other securities, the Issuer's operations, assets, prospects, financial position, and business development, Issuer's management, Issuer-related competitive and strategic matters, general economic, financial market and industry conditions, and other investment considerations. Depending on their evaluation of vario… Full filing |
9.1% |
| Blue Owl Capital Holdings LP 13G · institution new · filed 2026-05-14 | 5.9% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 3 | $59.2m | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 3 | $3.2m | $258.6k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-23 | Czibere Akos Chief Medical Officer | Sold plan | $258.6k12.5k shares |
| 2026-07-20 | Herrmann Ken Director | Sold | $119.3k4.9k shares |
| 2026-07-17 | Herrmann Ken Director | Sold | $77.3k3.1k shares |
| 2026-07-08 | Czibere Akos Chief Medical Officer | Sold | $1.4m50.0k shares |
| 2026-07-08 | Ron-Bigger Shulamit Chief Operating Officer | Sold | $1.4m50.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| MPM BIOIMPACT LLC 9.50% of their portfolio | 4.8m $155.9m | Unchanged |
| EcoR1 Capital, LLC 7.71% of their portfolio | 4.8m $155.5m | Unchanged |
| Blue Owl Capital Holdings LP 15.04% of their portfolio | 3.1m $99.0m | Reduced -91.1k |
| BlackRock, Inc. 0.00% of their portfolio | 2.3m $73.4m | Added +166.2k |
| T. Rowe Price Investment Management, Inc. 0.04% of their portfolio | 2.1m $66.1m | Reduced -72.4k |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 2.0m $63.4m | Reduced -350.8k |
| RTW INVESTMENTS, LP 0.44% of their portfolio | 1.6m $51.3m | Unchanged |
| RA CAPITAL MANAGEMENT, L.P. 0.37% of their portfolio | 1.3m $42.4m | Reduced -188.7k |
| Jupiter Topco LLC 0.02% of their portfolio | 1.3m $42.4m | First filing |
| BAKER BROS. ADVISORS LP 0.16% of their portfolio | 996.4k $32.1m | Unchanged |
| Octagon Capital Advisors LP 2.84% of their portfolio | 960.8k $31.0m | Unchanged |
| Merck & Co., Inc. 5.83% of their portfolio | 952.8k $30.7m | Unchanged |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 817.1k $26.3m | Reduced -16.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 763.5k $24.6m | Reduced -800.7k |
| TCG Crossover Management, LLC 0.54% of their portfolio | 696.6k $22.5m | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 520.7k $16.8m | Added +28.8k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.22% of their portfolio | 507.0k $16.3m | Unchanged |
| Avidity Partners Management LP 2.50% of their portfolio | 484.2k $15.6m | Reduced -452.9k |
| STATE STREET CORP 0.00% of their portfolio | 484.0k $15.6m | Added +55.8k |
| a16z Capital Management, L.L.C. 0.09% of their portfolio | 415.0k $13.4m | Unchanged |
| Alyeska Investment Group, L.P. 0.02% of their portfolio | 290.0k $9.3m | Unchanged |
| FMR LLC 0.00% of their portfolio | 285.6k $9.2m | Reduced -100.7k |
| ArrowMark Colorado Holdings LLC 0.33% of their portfolio | 245.9k $7.9m | Reduced -83.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 180.6k $5.8m | Added +31.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 166.8k $5.4m | Added +4.8k |
| BARCLAYS PLC 0.00% of their portfolio | 151.7k $4.9m | Added +142.0k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 145.2k $4.7m | Added +24.9k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 133.8k $4.3m | Added +6.4k |
| TD Asset Management Inc 0.00% of their portfolio | 105.9k $3.4m | Added +4.9k |
| SOROS FUND MANAGEMENT LLC 0.04% of their portfolio | 100.0k $3.2m | Unchanged |
| Woodline Partners LP 0.01% of their portfolio | 100.0k $3.2m | Unchanged |
| UBS Group AG 0.00% of their portfolio | 100.0k $3.2m | Reduced -253.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 95.4k $3.1m | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 72.8k $2.3m | Added +2.9k |
| POLEN CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 63.5k $2.0m | New |
| MORGAN STANLEY 0.00% of their portfolio | 62.6k $2.0m | Added +31.9k |
| Tidal Investments LLC 0.00% of their portfolio | 57.1k $1.8m | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 50.5k $1.6m | New |
| Nuveen, LLC 0.00% of their portfolio | 49.8k $1.6m | Added +25.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 49.2k $1.6m | Added +6.3k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 48.1k $1.6m | New |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 48.0k $1.5m | Added +1.1k |
| Quantinno Capital Management LP 0.00% of their portfolio | 46.9k $1.5m | New |
| GREAT LAKES ADVISORS, LLC 0.01% of their portfolio | 43.6k $1.4m | New |
| Mirador Capital Partners LP 0.16% of their portfolio | 40.1k $1.3m | New |
| Squarepoint Ops LLC 0.00% of their portfolio | 38.4k $1.2m | New |
| Jump Financial, LLC 0.01% of their portfolio | 32.8k $1.1m | New |
| Sofinnova Investments, Inc. 0.06% of their portfolio | 32.4k $1.0m | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 30.9k $996.4k | New |
| READYSTATE ASSET MANAGEMENT LP 0.04% of their portfolio | 30.0k $966.9k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 27.7k $891.5k | Added +20.0k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 26.9k $868.4k | Added +5.9k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 25.5k $823.1k | Reduced -49.5k |
| Ghisallo Capital Management LLC 0.02% of their portfolio | 25.0k $805.8k | Unchanged |
| SEVEN GRAND MANAGERS, LLC 0.03% of their portfolio | 25.0k $805.8k | Unchanged |
| TUDOR INVESTMENT CORP ET AL 0.00% of their portfolio | 21.4k $689.8k | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 21.3k $685.8k | Reduced -8.9k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 21.0k $677.5k | Added +6.9k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 20.0k $644.6k | Reduced -82.9k |
| Mariner, LLC 0.00% of their portfolio | 17.8k $572.7k | New |
| SEI INVESTMENTS CO 0.00% of their portfolio | 16.4k $528.5k | New |
| Virtus Investment Advisers, LLC 0.11% of their portfolio | 14.9k $480.9k | New |
| Invesco Ltd. 0.00% of their portfolio | 14.9k $480.5k | Added +2.8k |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 14.4k $463.4k | New |
| CITIGROUP INC 0.00% of their portfolio | 13.2k $424.7k | Added +12.2k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 13.0k $418.8k | Added +1.4k |
| Caprock Group, LLC 0.01% of their portfolio | 9.9k $319.3k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 9.8k $314.9k | Added +118 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 8.8k $266.0k | Added +480 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 8.6k $277.9k | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 7.8k $249.9k | Added +6.2k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 7.5k $241.7k | Added +4.3k |
| AXQ CAPITAL, LP 0.02% of their portfolio | 7.0k $226.3k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 6.9k $221.9k | Reduced -2.8k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 6.1k $197.9k | Reduced -808 |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 5.5k $178.2k | Unchanged |
| LANARK FINANCIAL, INC. 0.01% of their portfolio | 5.4k $172.7k | New |
| SG Americas Securities, LLC 0.00% of their portfolio | 3.4k $109.0k | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 3.3k $105.7k | Reduced -1.2k |
| STRS OHIO 0.00% of their portfolio | 3.1k $99.9k | Reduced -500 |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 2.3k $73.1k | Added +1.3k |
| Pinnacle Wealth Planning Services, Inc. 0.01% of their portfolio | 2.3k $73.1k | New |
| Legal & General Group Plc 0.00% of their portfolio | 2.1k $66.6k | Added +236 |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 1.9k $62.0k | Added +242 |
| SALEM INVESTMENT COUNSELORS INC 0.00% of their portfolio | 1.0k $32.2k | Unchanged |
| State of Wyoming 0.00% of their portfolio | 985 $31.7k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 797 $25.0k | New |
| NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio | 700 $22.6k | New |
| FIFTH THIRD BANCORP 0.00% of their portfolio | 576 $18.6k | New |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 397 $12.8k | New |
| Global Retirement Partners, LLC 0.00% of their portfolio | 395 $12.7k | First filing |
| Arax Advisory Partners 0.00% of their portfolio | 385 $12.4k | New |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 310 $10.0k | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 288 $9.3k | New |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 250 $8.1k | New |
| Sterling Capital Management LLC 0.00% of their portfolio | 184 $5.9k | Reduced -209 |
| Allworth Financial LP 0.00% of their portfolio | 124 $4.0k | New |
| IFP Advisors, Inc 0.00% of their portfolio | 101 $3.3k | New |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 80 $2.6k | New |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 77 $2.4k | New |