Healthcare Of Ontario Pension Plan Trust Fund - Jun 30, 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: 20M shares
Disclosed Ownership: 100K shares
Ownership: 0.5%
Form type: SCHEDULE 13G/A
Date filed: 8/13/2025, 04:02 PM
Date of event: Jun 30, 2025
Previous filing: May 14, 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%	100K	100K		/s/ Abas Kanu	VP, HOOPP Compliance Officer