Third Coast Bancshares to merge with Great Plains Bancshares

Third Coast entered into a definitive Merger Agreement with Great Plains Bancshares on October 6, 2026, under which Great Plains will merge into Third Coast's subsidiary followed by a second-step merger. M&A announcements involving significant bank consolidations typically drive material price moves on the acquiring party's stock due to changes in earnings accretion, market exposure, and shareholder dilution expectations.

Third Coast Bancshares agreed to buy Great Plains Bancshares in a multi-step merger transaction. This is a major business combination that typically causes significant stock price movement.