BERKLEY W R CORP - 31 Dec 2025 SCHEDULE 13G Report for SILVERBOX CORP IV Class A ordinary shares, par value $0.0001 per share (SBXD)

Filing Manager: BERKLEY W R CORP
Reporting Manager: W. R. Berkley Corporation
Security: SILVERBOX CORP IV Class A ordinary shares, par value $0.0001 per share
Symbol: SBXD
Shares outstanding: 20,536,847 shares
Disclosed Ownership: 1,211,674 shares
Ownership: 5.9%
Form type: SCHEDULE 13G
Filing time: 11 Feb 2026, 16:19:50 UTC
Date of event: 31 Dec 2025
SEC: View on sec.gov

Reporting Managers (2)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
W. R. Berkley Corporation	5.9%	1,211,674	0	1,211,674	/s/ Richard M. Baio	Richard M. Baio/Executive Vice President and Chief Financial Officer
Berkley Insurance Company	5.9%	1,211,674	0	1,211,674	/s/ Richard M. Baio	Richard M. Baio/Executive Vice President and Treasurer