{"transactions":[{"id":771381,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-05-19T20:22:11.000Z","date":"2026-05-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":194,"price":53.81,"value":10439.14,"ownership":{"direct":true},"balance_after":4648,"source":{"system":"sec-edgar","filing":"0000892712-26-000269","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000089271226000269/form4.xml","form_type":"4"}},{"id":808631,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-04-14T20:23:41.000Z","date":"2026-04-10","kind":"tax_withholding","planned":false,"acquired":false,"shares":1108,"price":58.6,"value":64928.8,"ownership":{"direct":true},"balance_after":4842,"source":{"system":"sec-edgar","filing":"0000892712-26-000211","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000089271226000211/form4.xml","form_type":"4"}},{"id":808630,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-04-14T20:23:41.000Z","date":"2026-04-10","kind":"grant","planned":false,"acquired":true,"shares":2500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Issuance of Common Stock upon vesting of Performance Restricted Stock Unit awards for the performance period 2023-2025."}],"balance_after":5950,"source":{"system":"sec-edgar","filing":"0000892712-26-000211","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000089271226000211/form4.xml","form_type":"4"}},{"id":895932,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-02-18T21:23:42.000Z","date":"2026-02-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":398,"price":58.36,"value":23227.28,"ownership":{"direct":true},"balance_after":3450,"source":{"system":"sec-edgar","filing":"0000892712-26-000123","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000089271226000123/form4.xml","form_type":"4"}},{"id":895931,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-02-18T21:23:42.000Z","date":"2026-02-16","kind":"grant","planned":false,"acquired":true,"shares":605,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":3848,"source":{"system":"sec-edgar","filing":"0000892712-26-000123","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000089271226000123/form4.xml","form_type":"4"}},{"id":1140091,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2025-05-20T20:28:42.000Z","date":"2025-05-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":194,"price":49.38,"value":9579.72,"ownership":{"direct":true},"balance_after":3243,"source":{"system":"sec-edgar","filing":"0001062993-25-009877","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299325009877/form4.xml","form_type":"4"}},{"id":1258826,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2025-02-19T21:46:28.000Z","date":"2025-02-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":292,"price":52.76,"value":15405.92,"ownership":{"direct":true},"balance_after":3437,"source":{"system":"sec-edgar","filing":"0001062993-25-002848","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299325002848/form4.xml","form_type":"4"}},{"id":1258825,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2025-02-19T21:46:28.000Z","date":"2025-02-16","kind":"grant","planned":false,"acquired":true,"shares":640,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":3729,"source":{"system":"sec-edgar","filing":"0001062993-25-002848","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299325002848/form4.xml","form_type":"4"}},{"id":1508633,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2024-05-20T20:24:27.000Z","date":"2024-05-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":162,"price":34.5,"value":5589.0,"ownership":{"direct":true},"balance_after":3089,"source":{"system":"sec-edgar","filing":"0001062993-24-010801","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299324010801/form4.xml","form_type":"4"}},{"id":1628208,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2024-02-21T21:42:14.000Z","date":"2024-02-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":126,"price":36.06,"value":4543.56,"ownership":{"direct":true},"balance_after":3251,"source":{"system":"sec-edgar","filing":"0001062993-24-003943","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299324003943/form4.xml","form_type":"4"}},{"id":1628207,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2024-02-21T21:42:14.000Z","date":"2024-02-16","kind":"grant","planned":false,"acquired":true,"shares":865,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":3377,"source":{"system":"sec-edgar","filing":"0001062993-24-003943","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299324003943/form4.xml","form_type":"4"}},{"id":1886523,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2023-05-18T20:08:13.000Z","date":"2023-05-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":128,"price":25.51,"value":3265.28,"ownership":{"direct":true},"balance_after":2512,"source":{"system":"sec-edgar","filing":"0001062993-23-011579","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299323011579/form4.xml","form_type":"4"}},{"id":2002937,"issuer":{"id":5359,"kind":"organization","name":"FIRST BUSINESS FINANCIAL SERVICES, INC."},"owners":[{"id":45928,"kind":"person","name":"Garcia Laura M.","position":1,"cik":"0001963540","reported_name":"Garcia Laura M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2023-02-21T21:28:20.000Z","date":"2023-02-16","kind":"grant","acquired":true,"shares":895,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":2640,"source":{"system":"sec-edgar","filing":"0001062993-23-004239","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521951/000106299323004239/form4.xml","form_type":"4"}}]}