SCHEDULE 13G

APOGEE ACQUISITION CORP

Class A ordinary shares, $0.0001 par value per share · CUSIP: G04126101

Event date: 2026-09-30

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

• Westchester Capital Management, LLC

  Shares: 1,268,758 · Class: 7.16%

• Westchester Capital Partners, LLC

  Shares: 6,242 · Class: 0.04%

• Virtus Investment Advisers, LLC

  Shares: 1,176,113 · Class: 6.64%

• The Merger Fund

  Shares: 1,136,270 · Class: 6.41%

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