Third Coast to Buy Great Plains in $239.6 Million Stock Deal
The all-stock merger is expected to expand Third Coast’s Dallas footprint and put the Texas community bank into Oklahoma.
Third Coast Bancshares, Inc. (TCBX), the parent of Third Coast Bank, agreed to acquire Great Plains Bancshares, Inc. in an all-stock transaction valued at approximately $239.6 million.
The partnership is intended to combine two culturally aligned, relationship-driven community banks, expand Third Coast’s Dallas presence and establish its entry into the Oklahoma market. Closing is expected in the first quarter of 2027, subject to customary regulatory approvals and other closing conditions.
Bart Caraway, Founder, Chairman, President and Chief Executive Officer of Third Coast, said, “We are thrilled to join forces with Great Plains, an exceptional franchise rooted in relationships across Oklahoma and North Texas, a talented team, and a well-earned reputation for doing right by its customers. Together, we are creating a stronger organization with greater scale, expanded capabilities, and increased capacity to support our customers.”
The Oklahoma and North Texas franchise is the geographic hook. Third Coast already operates in Texas; the Great Plains combination is framed as both a deepening of the Dallas market and a first step into Oklahoma, rather than a purely scale play.
The deal follows Third Coast’s October 2025 agreement to buy Keystone Bancshares, Inc., the parent of Keystone Bank, SSB, in a stock-and-cash transaction valued at approximately $123 million. That Keystone merger closed on February 1, 2026, leaving a combined company with total assets in excess of $6 billion. Keystone Bank contributed two Austin branches, one in Ballinger, Texas, and a loan production office in Bastrop, Texas. Third Coast Bank, headquartered in Humble, Texas, operated nineteen banking locations across cities including Austin, Dallas, Fort Worth, Houston, San Antonio and The Woodlands.
The Great Plains agreement is all-stock, matching the equity-heavy structure of the Keystone deal and the broader pattern of community-bank combinations that pair relationship franchises rather than cashing out the target. No cash-per-share figure, exchange ratio or premium was disclosed in the announcement.
Customer conversion and integration timing were not specified beyond the expected first-quarter 2027 close. The combined organization is expected to have greater scale, expanded capabilities and increased capacity to support customers.