SCHEDULE 13G/A

HORIZON SPACE ACQUSTN I CORP

Class A Ordinary Shares, par value $0.0001 per share · CUSIP: G4619M109

Event date: 2025-03-31

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

• First Trust Merger Arbitrage Fund

  Shares: 280,410.00 · Class: 6.73%

• First Trust Capital Management L.P.

  Shares: 300,000.00 · Class: 7.20%

• First Trust Capital Solutions L.P.

  Shares: 300,000.00 · Class: 7.20%

• FTCS Sub GP LLC

  Shares: 300,000.00 · Class: 7.20%

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