Companies / Aktis Oncology, Inc.
Aktis Oncology, Inc.
Nasdaq: AKTSCIK 2035832BOSTON, MA
Ownership
55.3M shares outstanding · as of Apr 30, 2026
Ownership
Share classes
| Common Stock | 96.61% | |
| Class A | 3.39% |
| Insiders | 8.61% | 4,759,726 |
| 10%+ / strategic | 37.41% | 20,677,515 |
| Institutions | 15.53% | 8,582,184 |
| Public float | 38.46% | 21,258,022 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 27
View all →| Insider | % of shares | Shares |
|---|---|---|
Gadicke Ansbert10% owner | 18.56% | 10,260,064 |
Mpm Bioventures 2018, L.P.10% owner | 18.56% | 10,260,064 |
Foley ToddDirector · 10% owner | 7.66% | 4,235,403 |
EcoR1 Capital, LLCDirector · 10% owner | 0.63% | 347,305 |
Kim Helen SusanDirector · 10% owner | 0.28% | 157,387 |
Vida Ventures II, LLC10% owner | 0.28% | 157,387 |
Segal Lloyd MitchellDirector | 0.04% | 19,631 |
Czibere AkosChief Medical Officer | — | — |
ELI LILLY & Co10% owner | — | — |
Evnin Luke10% owner | — | — |
Institutional holders 21
View all →| Holder | Value | % of shares |
|---|---|---|
| $73.43M | 4.12% | |
| $30.71M | 1.72% | |
| $26.89M | 2.72% | |
| $26.02M | 2.63% | |
| $17.82M | 1.80% | |
| $15.60M | 0.88% | |
| $8.80M | 0.89% | |
| $1.81M | 0.18% | |
| $1.79M | 0.18% | |
| $1.79M | 0.18% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q2 2026 as of | BlackRock, Inc. 13F manager | New | Common Stock | $73.43M | +2.3M | 2,278,358 4.12% of shares | high |
| Q2 2026 as of | Merck & Co., Inc. 13F manager | New | Common Stock | $30.71M | +953K | 952,844 1.72% of shares | medium |
| Q1 2026 as of | RA Capital Management, L.P. 13F manager | New | Common Stock | $26.89M | +1.5M | 1,503,084 2.72% of shares | medium |
| Q1 2026 as of | Janus Henderson Group PLC 13F manager | New | Common Stock | $26.02M | +1.5M | 1,454,267 2.63% of shares | medium |
| Q1 2026 as of | Baker Bros. Advisors LP 13F manager | New | Common Stock | $17.82M | +996K | 996,351 1.80% of shares | medium |
| Q2 2026 as of | State Street Corporation 13F manager | New | Common Stock | $15.60M | +484K | 484,010 0.88% of shares | medium |
| Q1 2026 as of | Geode Capital Management, LLC 13F manager | New | Common Stock | $8.80M | +492K | 491,936 0.89% of shares | medium |
| Q1 2026 as of | TD Asset Management Inc 13F manager | New | Common Stock | $1.81M | +101K | 100,962 0.18% of shares | low |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| AKTS | Common Stock | 01021M104 |