144 0001311380 XXXXXXXX LIVE 0001521951 FIRST BUSINESS FINANCIAL SERVICES, INC. 001-34095 401 CHARMANY DRIVE MADISON WI 53719 608-238-8008 MELOY MARK J Officer Common CAPIS

1700 Pacific Avenue Suite 1100 Dallas TX 75201

5000 204150.00 8294589 08/12/2024 NASDAQ Common 02/16/2022 Restricted Stock Vesting Issuer N 839 02/16/2022 Compensation Common 04/18/2022 Performance Restricted Stock Vesting Issuer N 2658 04/18/2022 Compensation Common 08/16/2022 Restricted Stock Vesting Issuer N 198 08/16/2022 Compensation Common 02/16/2023 Restricted Stock Vesting Issuer N 751 02/16/2023 Compensation Common 04/17/2023 Performance Restricted Stock Vesting Issuer N 554 04/17/2023 Compensation Y 08/09/2024 08/09/2024 Mark J. Meloy