UNITED STATES SECURITIES AND EXCHANGE COMMISSION 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, 2023 ☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the transition period from to Commission file number 001-34657 TEXAS CAPITAL BANCSHARES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 75-2679109 (State or other jurisdic ...