UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Common Stock, $0.01 par value FBIZ The Nasdaq Stock Market LLC FORM 10-Q ☑ Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2020 OR ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-34095 FIRST BUSINESS FINANCIAL SERVICES, INC. (Exact name of registrant as specified in its charter) Wisco ...