683 Capital Management, LLC - 29 Dec 2025 SCHEDULE 13G Report for Mereo BioPharma Group plc American Depositary Shares, each representing five ordinary shares, nominal value of 0.003 GBP per share (MREO)

Filing Manager
683 Capital Management, LLC
Reporting Manager
683 Capital Management, LLC
Security
Mereo BioPharma Group plc American Depositary Shares, each representing five ordinary shares, nominal value of 0.003 GBP per share
Symbol
MREO
Shares outstanding
795,645,660 shares
Disclosed Ownership
65,083,815 shares
Ownership
8.2%
Form type
SCHEDULE 13G
Filing time
06 Jan 2026, 17:38:48 UTC
Date of event
29 Dec 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
683 Capital Management, LLC 8.2% 65,083,815 0 65,083,815 Ari Zweiman Managing Member
683 Capital Partners, LP 8.2% 65,083,815 0 65,083,815 Ari Zweiman Authorized Person
Ari Zweiman 8.2% 65,083,815 0 65,083,815 Ari Zweiman Self