BlackRock Portfolio Management LLC - Sep 30, 2025 SCHEDULE 13G/A Report for FIRST BUSINESS FINANCIAL SERVICES, INC. Common Stock (FBIZ)

Filing Manager: BlackRock Portfolio Management LLC
Reporting Manager: BlackRock Portfolio Management LLC
Security: FIRST BUSINESS FINANCIAL SERVICES, INC. Common Stock
Symbol: FBIZ
Shares outstanding: 8.27M shares
Disclosed Ownership: 405K shares
Ownership: 4.9%
Form type: SCHEDULE 13G/A
Date filed: 10/17/2025, 12:45 PM
Date of event: Sep 30, 2025
Previous filing: Apr 15, 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
BlackRock Portfolio Management LLC	4.9%	405K	363K	0	Spencer Fleming	Managing Director