Third Coast Bancshares, Inc.

Item 2.02 Results of Operations and Financial Condition. On October 21, 2026, Third Coast Bancshares, Inc. (the "Company") issued a press release announcing its financial results for the quarter ended September 30, 2026. A copy of the Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section. The information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be incorporated by reference into any filing or other document pursuant to the Securities Act of 1933, as amended (the "Securities Act"), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document. Item 7.01 Regulation FD Disclosure. The Company intends to hold an investor call and webcast to discuss its financial results for the quarter ended September 30, 2026, on Thursday, October 22, 2026, at 10:00 a.m. Central Time. The Company's presentation to analysts and investors contains additional information about the Company's financial results for the quarter ended September 30, 2026, and is furnished as Exhibit 99.2 to this Current Report on Form 8-K. In accordance with General Instruction B.2 of Form 8-K, the information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.2, shall not be deemed "filed" for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.2, shall not be incorporated by reference into any filing or other document pursuant to the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document. Item 9.01 Financial Statements and Exhibits. (d) Exhibits.

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