Adage Capital Management, L.P. - 31 Dec 2025 SCHEDULE 13G Report for Apex Treasury Corp Class A Ordinary Shares, par value $0.0001 per share (APXT)

Filing Manager
Adage Capital Management, L.P.
Reporting Manager
Adage Capital Management, L.P.
Security
Apex Treasury Corp Class A Ordinary Shares, par value $0.0001 per share
Symbol
APXT
Shares outstanding
34,456,355 shares
Disclosed Ownership
2,250,000 shares
Ownership
6.5%
Form type
SCHEDULE 13G
Filing time
12 Feb 2026, 09:02:21 UTC
Date of event
31 Dec 2025
SEC
View on sec.gov

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Quoteable Key Fact

"Adage Capital Management, L.P. disclosed 6.5% ownership in Apex Treasury Corp Class A Ordinary Shares, par value $0.0001 per share (APXT) on 31 Dec 2025."

Quick Takeaways

  • Adage Capital Management, L.P. filed SCHEDULE 13G for Apex Treasury Corp Class A Ordinary Shares, par value $0.0001 per share (APXT).
  • Disclosed ownership: 6.5%.
  • Date of event: 31 Dec 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 12 Feb 2026, 09:02.

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. 6.5% 2,250,000 0 2,250,000 /s/ Robert Atchinson By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member
Robert Atchinson 6.5% 2,250,000 0 2,250,000 /s/ Robert Atchinson Robert Atchinson, individually
Phillip Gross 6.5% 2,250,000 0 2,250,000 /s/ Phillip Gross Phillip Gross, individually

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