HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND - 31 Mar 2025 SCHEDULE 13G/A Report for SilverBox Corp IV Class A ordinary shares, $0.0001 par value (SBXD)

Filing Manager: HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
Reporting Manager: Healthcare of Ontario Pension Plan Trust Fund
Security: SilverBox Corp IV Class A ordinary shares, $0.0001 par value
Symbol: SBXD
Shares outstanding: 20.5M shares
Disclosed Ownership: 1.8M shares
Ownership: 8.8%
Form type: SCHEDULE 13G/A
Filing time: 14 May 2025, 16:15:08 UTC
Date of event: 31 Mar 2025
Next filing: 13 Aug 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Healthcare of Ontario Pension Plan Trust Fund	8.8%	1.8M	1.8M		/s/ Abas Kanu	VP, HOOPP Compliance Officer