Transfer of Listing on Stock Market Exchange

On September 22, 2025, the Company, acting pursuant to authorization from its Board of Directors, provided written notice to The Nasdaq Stock Market LLC (“Nasdaq”) of its intention to voluntarily withdraw the principal listing of its common stock, par value $1.00 per share (“Common Stock”), from Nasdaq and transfer the listing of its Common Stock to the New York Stock Exchange (the “NYSE”) and to NYSE Texas. The listing and trading of the Common Stock on Nasdaq ended at market close on October 3, 2025, and trading commenced on the NYSE and NYSE Texas at market open on October 6, 2025.

The Common Stock is authorized for dual listing on NYSE and NYSE Texas, where it continues to trade under the stock symbol “TCBX.”

Share Repurchase Program

On June 17, 2025, the Company's Board of Directors authorized a new share repurchase program (the “Repurchase Program”) under which the Company may repurchase up to $30 million of its common stock through May 22, 2026. Non-objection from the Federal Reserve Bank of Dallas related to the Repurchase Program was received on June 16, 2025. As of March 31, 2026, no shares were repurchased under the Repurchase Program.

Under the Repurchase Program, the Company may periodically buy its shares through open market transactions at current market
prices, privately negotiated deals, block trades, or other methods compliant with federal securities laws. The Repurchase Program can
be extended, modified, amended, suspended, or halted at any time by the Company's Board of Directors and does not obligate the
Company to repurchase its common stock.

Amendment to Certificate of Formation

On May 25, 2023, the shareholders of the Company approved the amendment and restatement (the “Amendment”) of Article VI of the Company's first amended and restated certificate of formation to authorize a new class of Non-Voting Common Stock. Under the terms of the Amendment, the Company is authorized to issue 54,500,000 shares of capital stock, consisting of 50,000,000 shares of common stock, par value $1.00 per share, 3,500,000 shares of Non-Voting Common Stock, and 1,000,000 shares of preferred stock, par value $1.00 per share. The shares of capital stock may be issued as authorized by the board of directors of the Company without the approval of its shareholders, except as otherwise provided by governing law, rule or regulation or as set forth in the certificate of formation, as amended. The Amendment became effective upon the filing of the Certificate of Amendment to the Certificate of Formation of the Company with the Secretary of State of the State of Texas on May 25, 2023.

Preferred Stock

On September 30, 2022, the Company adopted resolutions creating Series A Convertible Non-Cumulative Preferred Stock (“Series A Preferred Stock”) and Series B Preferred Stock, with 69,400 shares authorized for each series. Series A Preferred Stock is convertible into: (i) shares of common stock, subject to a cap with respect to each purchaser equal to 9.9% of the total outstanding shares of common stock (or any class of voting securities of the Company) (the “Regulatory Cap”), and once the Regulatory Cap has been reached, (ii) shares of Series B Preferred stock, and (iii) Non-Voting Common Stock. The Regulatory Cap will be calculated in accordance with the Federal Reserve regulations and such calculation will include, as applicable, the ownership of any person to whom a holder of Series A Preferred Stock transfers capital stock of the Company and any person to whom such person transfers capital stock of the Company, in each case, other than transferees in a transfer of the type identified in the Federal Reserve Regulations at 12 C.F.R. § 225.9(a)(3)(ii), or any successor provision. The Certificate of Designation, Preferences and Rights of Series A Convertible Non-Cumulative Preferred Stock of Third Coast Bancshares, Inc. (the “Series A Certificate of Designation”) also contains an ownership cap, with respect to an initial acquirer of Series A Preferred Stock pursuant to the Investment Agreement, dated September 8, 2022, by and among the Company and the several purchasers thereto, all affiliates, and certain direct and indirect transferees, of one-third of the total equity of the Company calculated in accordance with the Federal Reserve Regulations at 12 C.F.R. § 225.34 (“Total Equity Limitations”).

Subject to the terms and conditions set forth in the Series A Certificate of Designation, the Regulatory Cap and the Total Equity Limitation, the Series A Preferred Stock is convertible into common stock and Non-Voting Common Stock at a rate equal to its liquidation preference of $1,000 per share divided by the conversion price of $22.50. The Series A Preferred Stock that is converted into Series B Preferred Stock shall convert at a rate of one share of Series B Preferred Stock for one share of Series A Preferred Stock. The conversion price is subject to adjustment in accordance with the terms of the Series A Certificate of Designation in connection with certain customary events, including, without limitation, certain dividends, distributions, subdivisions, splits, combinations, and tender or exchange offers.

Preferred Stock - Private Placement

On September 30, 2022, the Company completed a private placement of (i) 69,400 shares of Series A Preferred Stock, with a liquidation preference of $1,000 per share, and (ii) the Preferred Warrants at an exercise price equal to $22.50 per share, for aggregate gross proceeds of $69.4 million before deducting placement fees and offering expenses. Aggregate net proceeds were $66.2 million after deducting placement fees and offering expenses of $3.2 million.

The securities sold in the private placement were sold only to accredited investors and were issued without registration under the Securities Act, in reliance upon the exemption provided under Section 4(a)(2) of the Securities Act and Regulation D promulgated thereunder as securities offered and sold only to accredited investors (as defined in Rule 501(a) of Regulation D under the Securities Act) in a transaction not involving any public offering. Officers and directors of the Company purchased $2.7 million of the Series A Preferred Stock.

Registration of Securities Issued in Private Placement

The Company filed a Registration Statement on Form S-3 with the SEC on September 25, 2024, registering the resale from time to time by the securityholders named therein of the shares of Series A Preferred Stock and Preferred Warrants issued to such securityholders in the private placement completed on September 30, 2022 and the securities issuable upon conversion of shares of Series A Preferred Stock, Series B Preferred Stock or Non-Voting Common Stock, or upon exercise of the Preferred Warrants. The Registration Statement was declared effective by the SEC on October 4, 2024.

Regulatory Matters

On March 13, 2024, the Bank completed its conversion from a Texas state savings bank to a Texas banking association. As a result of the conversion, the Texas Department of Banking is the Bank’s primary state regulator. The Bank remains as a member of the Federal Reserve System, and the Federal Reserve is the Bank’s primary federal regulator. The Federal Reserve also continues to be the Company’s primary federal regulator.

The Company and Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and Bank must meet specific capital guidelines that involve quantitative measures of the Company and Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company and Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

Quantitative measures established by regulation to ensure capital adequacy require the Company and Bank to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1 capital, and Common Equity Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of March 31, 2026 and December 31, 2025, the Company and Bank meet all capital adequacy requirements to which it is subject.

Financial institutions are categorized as well capitalized or adequately capitalized, based on minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the tables below. As shown below, the Bank’s capital ratios exceed the regulatory definition of well capitalized as of March 31, 2026 and December 31, 2025. Based upon the information in its most recently filed call report, the Bank continues to meet the capital ratios necessary to be well capitalized under the regulatory framework for prompt corrective action.

There are no conditions or events since March 31, 2026 that management believes have changed the Bank’s category.