UNITED STATES SECURITIES AND EXCHANGE COMMISSION Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $0.01 Par Value Per Share BKD New York Stock Exchange Washington, D.C. 20549 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, 2021 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____________ to ...