144 0001343486 XXXXXXXX LIVE 0001521951 FIRST BUSINESS FINANCIAL SERVICES, INC. 001-34095 401 CHARMANY DRIVE MADISON WI 53719 608-238-8008 Sanders Carol P Director Common LPL Financial

1055 LPL Way Fort Mill SC 29715

8881 446270.25 8295017 12/13/2024 Nasdaq Common 05/18/2017 Open Market Purchase Open Market Purchaser N 214 05/18/2017 Cash Consideration Common 08/08/2017 Open Market Purchase Open Market Purchaser N 231 08/08/2017 Cash Consideration Common 10/31/2017 Open Market Purchase Open Market Purchaser N 225 10/31/2017 Cash Consideration Common 02/01/2018 Open Market Purchase Open Market Purchaser N 205 02/01/2018 Cash Consideration Common 05/07/2018 Open Market Purchase Open Market Purchaser N 192 05/07/2018 Cash Consideration Common 08/01/2018 Open Market Purchase Open Market Purchaser N 200 08/01/2018 Cash Consideration Common 10/30/2018 Open Market Purchase Open Market Purchaser N 240 10/30/2018 Cash Consideration Common 04/30/2019 Open Market Purchase Open Market Purchaser N 258 04/30/2019 Cash Consideration Common 07/30/2019 Open Market Purchase Open Market Purchaser N 249 07/30/2019 Cash Consideration Common 10/29/2019 Open Market Purchase Open Market Purchaser N 245 10/29/2019 Cash Consideration Common 01/28/2020 Open Market Purchase Open Market Purchaser N 563 01/28/2020 Cash Consideration Common 03/02/2020 Open Market Purchase Open Market Purchaser N 460 03/02/2020 Cash Consideration Common 04/28/2020 Open Market Purchase Open Market Purchaser N 358 04/28/2020 Cash Consideration Common 07/28/2020 Open Market Purchase Open Market Purchaser N 413 07/28/2020 Cash Consideration Common 10/27/2020 Open Market Purchase Open Market Purchaser N 356 10/27/2020 Cash Consideration Common 11/13/2020 Open Market Purchase Open Market Purchaser N 1375 11/13/2020 Cash Consideration Common 02/02/2021 Open Market Purchase Open Market Purchaser N 315 02/02/2021 Cash Consideration Common 05/04/2021 Open Market Purchase Open Market Purchaser N 250 05/04/2021 Cash Consideration Common 08/03/2021 Open Market Purchase Open Market Purchaser N 219 08/03/2021 Cash Consideration Common 11/02/2021 Open Market Purchase Open Market Purchaser N 260 11/02/2021 Cash Consideration Common 03/09/2022 Open Market Purchase Open Market Purchaser N 190 03/09/2022 Cash Consideration Common 05/05/2022 Open Market Purchase Open Market Purchaser N 171 05/05/2022 Cash Consideration Common 08/04/2022 Open Market Purchase Open Market Purchaser N 181 08/04/2022 Cash Consideration Common 11/01/2022 Open Market Purchase Open Market Purchaser N 157 11/01/2022 Cash Consideration Common 01/31/2023 Open Market Purchase Open Market Purchaser N 172 01/31/2023 Cash Consideration Common 05/02/2023 Open Market Purchase Open Market Purchaser N 218 05/02/2023 Cash Consideration Common 08/01/2023 Open Market Purchase Open Market Purchaser N 177 08/01/2023 Cash Consideration Common 10/31/2023 Open Market Purchase Open Market Purchaser N 1 10/31/2023 Cash Consideration Common 10/31/2023 Open Market Purchase Open Market Purchaser N 192 10/31/2023 Cash Consideration Common 01/30/2024 Open Market Purchase Open Market Purchaser N 6 01/30/2024 Cash Consideration Common 01/30/2024 Open Market Purchase Open Market Purchaser N 35 01/30/2024 Cash Consideration Common 01/30/2024 Open Market Purchase Open Market Purchaser N 115 01/30/2024 Cash Consideration Common 05/01/2024 Open Market Purchase Open Market Purchaser N 75 05/01/2024 Cash Consideration Common 05/01/2024 Open Market Purchase Open Market Purchaser N 100 05/01/2024 Cash Consideration Common 07/30/2024 Open Market Purchase Open Market Purchaser N 129 07/30/2024 Cash Consideration Common 10/30/2024 Open Market Purchase Open Market Purchaser N 32 10/30/2024 Cash Consideration Common 10/30/2024 Open Market Purchase Open Market Purchaser N 102 10/30/2024 Cash Consideration Y 12/13/2024 Carol P. Sanders