EcoR1 Capital, LLC - 12 Jan 2026 SCHEDULE 13D Report for Aktis Oncology, Inc. Common Stock

Filing Manager
EcoR1 Capital, LLC
Reporting Manager
Oleg Nodelman
Security
Aktis Oncology, Inc. Common Stock
Shares outstanding
53,432,253 shares
Disclosed Ownership
4,862,335 shares
Ownership
9.1%
Form type
SCHEDULE 13D
Filing time
20 Jan 2026, 14:01:01 UTC
Date of event
12 Jan 2026
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
EcoR1 Capital, LLC 9.1% 4,824,469 0 4,824,469 /s/ Oleg Nodelman Manager 0001587114
Oleg Nodelman 9.1% 4,862,335 37,866 4,824,469 /s/ Oleg Nodelman Reporting person 0001454385
EcoR1 Capital Fund Qualified, L.P. 8.2% 4,348,658 0 4,348,658 /s/ Oleg Nodelman Manager of the General Partner, EcoR1 Capital, LLC 0001598292