HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND - 30 Jun 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: 20,000,000 shares
Disclosed Ownership: 100,000 shares
Ownership: 0.5%
Form type: SCHEDULE 13G/A
Filing time: 13 Aug 2025, 16:02:03 UTC
Date of event: 30 Jun 2025
Previous filing: 14 May 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	0.5%	100,000	100,000		/s/ Abas Kanu	VP, HOOPP Compliance Officer