Hingham Institution for Savings - 31 Dec 2025 SCHEDULE 13G Report for CHAIN BRIDGE BANCORP INC Class A common stock, par value $0.01 per share (CBNA)

Filing Manager: Hingham Institution for Savings
Reporting Manager: Hingham Institution for Savings
Security: CHAIN BRIDGE BANCORP INC Class A common stock, par value $0.01 per share
Symbol: CBNA
Shares outstanding: 3,298,483 shares
Disclosed Ownership: 293,565 shares
Ownership: 8.9%
Form type: SCHEDULE 13G
Filing time: 30 Jan 2026, 12:01:57 UTC
Date of event: 31 Dec 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Hingham Institution for Savings	8.9%	293,565	293,565	0	Cristian Melej	Chief Financial Officer