ADAGE CAPITAL PARTNERS GP, L.L.C. - 31 Dec 2024 SCHEDULE 13G/A Report for Mereo BioPharma Group plc Ordinary Shares, nominal value 0.003 GBP per share (MREO)

Filing Manager
ADAGE CAPITAL PARTNERS GP, L.L.C.
Reporting Manager
Adage Capital Management, L.P.
Security
Mereo BioPharma Group plc Ordinary Shares, nominal value 0.003 GBP per share
Symbol
MREO
Shares outstanding
775,357,028 shares
Disclosed Ownership
43,575,065 shares
Ownership
5.6%
Form type
SCHEDULE 13G/A
Filing time
12 Feb 2025, 09:34:55 UTC
Date of event
31 Dec 2024
SEC
View on sec.gov

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Quoteable Key Fact

"ADAGE CAPITAL PARTNERS GP, L.L.C. disclosed 5.6% ownership in Mereo BioPharma Group plc Ordinary Shares, nominal value 0.003 GBP per share (MREO) on 31 Dec 2024."

Quick Takeaways

  • ADAGE CAPITAL PARTNERS GP, L.L.C. filed SCHEDULE 13G/A for Mereo BioPharma Group plc Ordinary Shares, nominal value 0.003 GBP per share (MREO).
  • Disclosed ownership: 5.6%.
  • Date of event: 31 Dec 2024.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 12 Feb 2025, 09:34.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Official SEC Source

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (4)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Adage Capital Management, L.P. 5.6% 43,575,065 0 43,575,065 /s/ Robert Atchinson By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member
Adage Capital Partners GP, L.L.C. 0% 0 0 0 /s/ Robert Atchinson By: Adage Capital Advisors, L.L.C., its Managing Member, By: Robert Atchinson, its Managing Member
Robert Atchinson 5.6% 43,575,065 0 43,575,065 /s/ Robert Atchinson Robert Atchinson, individually
Phillip Gross 5.6% 43,575,065 0 43,575,065 /s/ Phillip Gross Phillip Gross, individually

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