Schedule 13G ownership disclosure

MEREO BIOPHARMA GROUP PLC

American Depositary Shares, each representing five ordinary shares, nominal value of 0.003 GBP per share · CUSIP: 589492107

Event date: 2025-12-29

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares
Unavailable
Percent of class
Unavailable
  • 683 Capital Management, LLC

    Shares: 65,083,815 · Class: 8.18%

  • 683 Capital Partners, LP

    Shares: 65,083,815 · Class: 8.18%

  • Ari Zweiman

    Shares: 65,083,815 · Class: 8.18%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.

Source: SEC EDGAR filing

Filing metadata

Accession number
0001404574-26-000002
Form type
SCHEDULE 13G
Filer
683 Capital Management, LLC
CIK
CIK 1404574
Filed
Jan 06, 2026
Reporting period
Dec 29, 2025
Description
Schedule 13G beneficial ownership

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