Aktis Oncology, Inc. (AKTS) — Institutional Holders, Q2 2026
114 institutional investment managers reported a AKTS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $1.1B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
AKTS in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- TCG Crossover ManagementNew · +696,560 sh+$22.5M
- BlackRockAdded · +166,231 sh+$5.4M
- BARCLAYS PLCAdded · +141,972 sh+$4.6M
- RENAISSANCE TECHNOLOGIESNew · +95,400 sh+$3.1M
- POLEN CAPITAL MANAGEMENTNew · +63,514 sh+$2.0M
Biggest sellers
- PRICE T ROWE ASSOCIATESTrimmed · -800,697 sh-$25.8M
- WELLINGTON MANAGEMENT GROUP LLPTrimmed · -350,800 sh-$11.3M
- UBS Group AGTrimmed · -253,303 sh-$8.2M
- RA CAPITAL MANAGEMENT, L.P.Trimmed · -188,679 sh-$6.1M
- DRIEHAUS CAPITAL MANAGEMENTSold out · -150,000 sh-$4.8M
AKTS 13F holders ranked 1–100 of 114
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | MPM BioImpact#1 · 4,835,872 sh | 4,835,872 | $155.9M | 9.50% | 0.0% |
| 2 | EcoR1 Capital#2 · 4,824,469 sh | 4,824,469 | $155.5M | 7.56% | 0.0% |
| 3 | Blue Owl Capital#3 · 3,070,219 sh | 3,070,219 | $99.0M | 14.89% | -2.9% |
| 4 | BlackRock#4 · 2,278,358 sh | 2,278,358 | $73.4M | <0.01% | +7.9% |
| 5 | T. Rowe Price Investment Management#5 · 2,051,447 sh | 2,051,447 | $66.1M | 0.04% | -3.4% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP#6 · 1,966,244 sh | 1,966,244 | $63.4M | 0.01% | -15.1% |
| 7 | RTW INVESTMENTS#7 · 1,592,043 sh | 1,592,043 | $51.3M | 0.44% | 0.0% |
| 8 | RA CAPITAL MANAGEMENT, L.P.#8 · 1,314,405 sh | 1,314,405 | $42.4M | 0.37% | -12.6% |
| 9 | Jupiter Topco#9 · 1,314,267 sh | 1,314,267 | $42.4M | 0.02% | — |
| 10 | BAKER BROS. ADVISORS#10 · 996,351 sh | 996,351 | $32.1M | 0.16% | 0.0% |
| 11 | Octagon Capital Advisors#11 · 960,847 sh | 960,847 | $31.0M | 2.78% | 0.0% |
| 12 | Merck#12 · 952,844 sh | 952,844 | $30.7M | 5.83% | 0.0% |
| 13 | VANGUARD CAPITAL MANAGEMENT#13 · 817,075 sh | 817,075 | $26.3M | <0.01% | -2.0% |
| 14 | PRICE T ROWE ASSOCIATES#14 · 763,499 sh | 763,499 | $24.6M | <0.01% | -51.2% |
| 15 | TCG Crossover Management#15 · 696,560 sh | 696,560 | $22.5M | 0.54% | New |
| 16 | GEODE CAPITAL MANAGEMENT#16 · 520,737 sh | 520,737 | $16.8M | <0.01% | +5.9% |
| 17 | EVENTIDE ASSET MANAGEMENT#17 · 507,000 sh | 507,000 | $16.3M | 0.22% | 0.0% |
| 18 | Avidity Partners Management#18 · 484,200 sh | 484,200 | $15.6M | 2.50% | +3.3% |
| 19 | STATE STREET#19 · 484,010 sh | 484,010 | $15.6M | <0.01% | +13.0% |
| 20 | a16z Capital Management, L.L.C.#20 · 415,000 sh | 415,000 | $13.4M | 0.09% | 0.0% |
| 21 | Alyeska Investment Group, L.P.#21 · 290,000 sh | 290,000 | $9.3M | 0.02% | 0.0% |
| 22 | FMR#22 · 285,631 sh | 285,631 | $9.2M | <0.01% | -26.1% |
| 23 | ArrowMark Colorado#23 · 245,872 sh | 245,872 | $7.9M | 0.33% | -25.4% |
| 24 | NORTHERN#24 · 180,575 sh | 180,575 | $5.8M | <0.01% | +20.8% |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT#25 · 166,842 sh | 166,842 | $5.4M | <0.01% | +3.0% |
| 26 | BARCLAYS PLC#26 · 151,696 sh | 151,696 | $4.9M | <0.01% | +1460.0% |
| 27 | VANGUARD PORTFOLIO MANAGEMENT#27 · 145,220 sh | 145,220 | $4.7M | <0.01% | +20.7% |
| 28 | VANGUARD FIDUCIARY#28 · 133,834 sh | 133,834 | $4.3M | <0.01% | +5.1% |
| 29 | TD ASSET MANAGEMENT#29 · 105,902 sh | 105,902 | $3.4M | <0.01% | +4.9% |
| 30 | SOROS FUND MANAGEMENT#30 · 100,000 sh | 100,000 | $3.2M | 0.04% | 0.0% |
| 31 | Woodline Partners#31 · 100,000 sh | 100,000 | $3.2M | 0.01% | 0.0% |
| 32 | UBS Group AG#32 · 99,960 sh | 99,960 | $3.2M | <0.01% | -71.7% |
| 33 | RENAISSANCE TECHNOLOGIES#33 · 95,400 sh | 95,400 | $3.1M | <0.01% | New |
| 34 | BANK OF AMERICA#34 · 72,835 sh | 72,835 | $2.3M | <0.01% | +4.2% |
| 35 | POLEN CAPITAL MANAGEMENT#35 · 63,514 sh | 63,514 | $2.0M | 0.02% | New |
| 36 | MORGAN STANLEY#36 · 62,636 sh | 62,636 | $2.0M | <0.01% | +103.9% |
| 37 | Toroso Investments#37 · 57,059 sh | 57,059 | $1.8M | <0.01% | New |
| 38 | RAYMOND JAMES FINANCIAL#38 · 50,464 sh | 50,464 | $1.6M | <0.01% | New |
| 39 | Nuveen#39 · 49,816 sh | 49,816 | $1.6M | <0.01% | +103.6% |
| 40 | Bank of New York Mellon#40 · 49,250 sh | 49,250 | $1.6M | <0.01% | +14.8% |
| 41 | AQR CAPITAL MANAGEMENT#41 · 48,123 sh | 48,123 | $1.6M | <0.01% | New |
| 42 | MANUFACTURERS LIFE INSURANCE COMPANY, THE#42 · 48,044 sh | 48,044 | $1.5M | <0.01% | +2.2% |
| 43 | Quantinno Capital Management#43 · 46,887 sh | 46,887 | $1.5M | <0.01% | New |
| 44 | GREAT LAKES ADVISORS#44 · 43,612 sh | 43,612 | $1.4M | 0.01% | New |
| 45 | Mirador Capital Partners#45 · 40,124 sh | 40,124 | $1.3M | — | New |
| 46 | Squarepoint Ops#46 · 38,381 sh | 38,381 | $1.2M | <0.01% | New |
| 47 | Jump Financial#47 · 32,779 sh | 32,779 | $1.1M | <0.01% | New |
| 48 | Sofinnova Ventures#48 · 32,436 sh | 32,436 | $1.0M | 0.05% | New |
| 49 | TWO SIGMA INVESTMENTS#49 · 30,914 sh | 30,914 | $996.4K | <0.01% | New |
| 50 | READYSTATE ASSET MANAGEMENT#50 · 30,000 sh | 30,000 | $966.9K | <0.01% | 0.0% |
| 51 | WELLS FARGO & COMPANY#51 · 27,659 sh | 27,659 | $891.5K | <0.01% | +263.4% |
| 52 | RHUMBLINE ADVISERS#52 · 26,945 sh | 26,945 | $868.4K | <0.01% | +28.1% |
| 53 | CITADEL ADVISORS#53 · 25,537 sh | 25,537 | $823.1K | <0.01% | -66.0% |
| 54 | Ghisallo Capital Management#54 · 25,000 sh | 25,000 | $805.8K | 0.02% | 0.0% |
| 55 | SEVEN GRAND MANAGERS#55 · 25,000 sh | 25,000 | $805.8K | 0.03% | 0.0% |
| 56 | TUDOR INVESTMENT ET AL#56 · 21,402 sh | 21,402 | $689.8K | <0.01% | New |
| 57 | GOLDMAN SACHS GROUP#57 · 21,278 sh | 21,278 | $685.8K | <0.01% | -29.5% |
| 58 | DEUTSCHE BANK AG\#58 · 21,022 sh | 21,022 | $677.5K | <0.01% | +49.3% |
| 59 | AMERIPRISE FINANCIAL#59 · 20,000 sh | 20,000 | $644.6K | <0.01% | -80.6% |
| 60 | Mariner#60 · 17,770 sh | 17,770 | $572.7K | <0.01% | New |
| 61 | SEI INVESTMENTS#61 · 16,402 sh | 16,402 | $528.5K | <0.01% | New |
| 62 | Virtus Investment Advisers#62 · 14,920 sh | 14,920 | $480.9K | 0.11% | New |
| 63 | Invesco Ltd.#63 · 14,908 sh | 14,908 | $480.5K | 0.00% | +23.1% |
| 64 | LOS ANGELES CAPITAL MANAGEMENT#64 · 14,379 sh | 14,379 | $463.4K | <0.01% | New |
| 65 | CITIGROUP#65 · 13,177 sh | 13,177 | $424.7K | <0.01% | +1193.1% |
| 66 | MetLife Investment Management#66 · 12,994 sh | 12,994 | $418.8K | <0.01% | +11.7% |
| 67 | Caprock Group#67 · 9,908 sh | 9,908 | $319.3K | <0.01% | New |
| 68 | MIRAE ASSET GLOBAL ETFS Ltd.#68 · 9,769 sh | 9,769 | $314.9K | <0.01% | +1.2% |
| 69 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#69 · 8,623 sh | 8,623 | $277.9K | 0.00% | New |
| 70 | JPMORGAN CHASE#70 · 8,835 sh | 8,835 | $266.0K | 0.00% | +5.7% |
| 71 | Russell Investments Group, Ltd.#71 · 7,754 sh | 7,754 | $249.9K | <0.01% | +399.9% |
| 72 | NEW YORK STATE COMMON RETIREMENT FUND#72 · 7,500 sh | 7,500 | $241.7K | <0.01% | +134.4% |
| 73 | AXQ CAPITAL#73 · 7,020 sh | 7,020 | $226.3K | 0.02% | New |
| 74 | Vanguard Global Advisers#74 · 6,886 sh | 6,886 | $221.9K | <0.01% | -28.9% |
| 75 | PNC FINANCIAL SERVICES GROUP#75 · 6,140 sh | 6,140 | $197.9K | <0.01% | -11.6% |
| 76 | Police & Firemen's Retirement System of New Jersey#76 · 5,530 sh | 5,530 | $178.2K | <0.01% | 0.0% |
| 77 | NBC SECURITIES#77 · 5,358 sh | 5,358 | $172.7K | — | New |
| 78 | SG Americas Securities#78 · 3,368 sh | 3,368 | $109.0K | <0.01% | New |
| 79 | BNP PARIBAS FINANCIAL MARKETS#79 · 3,280 sh | 3,280 | $105.7K | 0.00% | -26.8% |
| 80 | STRS OHIO#80 · 3,100 sh | 3,100 | $99.9K | <0.01% | -13.9% |
| 81 | Tower Research Capital (TRC)#81 · 2,268 sh | 2,268 | $73.1K | <0.01% | +124.8% |
| 82 | Pinnacle Wealth Planning Services#82 · 2,267 sh | 2,267 | $73.1K | <0.01% | New |
| 83 | Legal & General Group Plc#83 · 2,062 sh | 2,062 | $66.6K | 0.00% | +12.9% |
| 84 | Ameritas Investment Partners#84 · 1,925 sh | 1,925 | $62.0K | <0.01% | +14.4% |
| 85 | SALEM INVESTMENT COUNSELORS#85 · 1,000 sh | 1,000 | $32.2K | — | 0.0% |
| 86 | State of Wyoming#86 · 985 sh | 985 | $31.7K | <0.01% | New |
| 87 | ROYAL BANK OF CANADA#87 · 797 sh | 797 | $25.0K | 0.00% | New |
| 88 | NATIONAL BANK OF CANADA#88 · 700 sh | 700 | $22.6K | 0.00% | New |
| 89 | FIFTH THIRD BANCORP#89 · 576 sh | 576 | $18.6K | 0.00% | New |
| 90 | Rockefeller Capital Management L.P.#90 · 397 sh | 397 | $12.8K | 0.00% | New |
| 91 | Global Retirement Partners#91 · 395 sh | 395 | $12.7K | <0.01% | — |
| 92 | SRS Capital Advisors#92 · 385 sh | 385 | $12.4K | <0.01% | New |
| 93 | Integrated Wealth Concepts#93 · 310 sh | 310 | $10.0K | 0.00% | New |
| 94 | Federation des caisses Desjardins du Quebec#94 · 250 sh | 250 | $8.1K | 0.00% | New |
| 95 | Sterling Capital Management#95 · 184 sh | 184 | $5.9K | — | -53.2% |
| 96 | Allworth Financial#96 · 124 sh | 124 | $4.0K | 0.00% | New |
| 97 | IFP Advisors#97 · 101 sh | 101 | $3.3K | — | New |
| 98 | EverSource Wealth Advisors#98 · 80 sh | 80 | $2.6K | <0.01% | New |
| 99 | Farther Finance Advisors#99 · 77 sh | 77 | $2.4K | — | New |
| 100 | HM PAYSON#100 · 74 sh | 74 | $2.4K | 0.00% | New |
Funds that sold out of AKTS in Q2 2026 (6)
Held AKTS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| DRIEHAUS CAPITAL MANAGEMENT150,000 sh | 150,000 | $2.7M |
| Laurion Capital Management100,000 sh | 100,000 | $1.8M |
| D. E. Shaw17,062 sh | 17,062 | $305.2K |
| Zimmer Partners15,000 sh | 15,000 | $268.4K |
| Universal- Beteiligungs- und Servicegesellschaft mbH14,185 sh | 14,185 | $253.8K |
| XTX Topco Ltd13,990 sh | 13,990 | $250.3K |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.