Adage Capital Management, L.P. - 30 Sep 2025 SCHEDULE 13G/A Report for MeiraGTx Holdings plc Ordinary Shares, par value $0.00003881 per share (MGTX)

Filing Manager
Adage Capital Management, L.P.
Reporting Manager
Adage Capital Management, L.P.
Security
MeiraGTx Holdings plc Ordinary Shares, par value $0.00003881 per share
Symbol
MGTX
Shares outstanding
80,472,654 shares
Disclosed Ownership
4,184,578 shares
Ownership
5.2%
Form type
SCHEDULE 13G/A
Filing time
13 Nov 2025, 09:05:15 UTC
Date of event
30 Sep 2025
SEC
View on sec.gov

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Quoteable Key Fact

"Adage Capital Management, L.P. disclosed 5.2% ownership in MeiraGTx Holdings plc Ordinary Shares, par value $0.00003881 per share (MGTX) on 30 Sep 2025."

Quick Takeaways

  • Adage Capital Management, L.P. filed SCHEDULE 13G/A for MeiraGTx Holdings plc Ordinary Shares, par value $0.00003881 per share (MGTX).
  • Disclosed ownership: 5.2%.
  • Date of event: 30 Sep 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 13 Nov 2025, 09:05.

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 (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Adage Capital Management, L.P. 5.2% 4,184,578 0 4,184,578 /s/ Robert Atchinson By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member
Robert Atchinson 5.2% 4,184,578 0 4,184,578 /s/ Robert Atchinson Robert Atchinson, individually
Phillip Gross 5.2% 4,184,578 0 4,184,578 /s/ Phillip Gross Phillip Gross, individually

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