Third Coast Bancshares Acquired Great Plains for $240M
The all-stock deal expands the lender's network into Oklahoma and brings the combined asset total to $9 billion.
Updated on Oct. 12, 2026 in Financial Services
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Third Coast Bancshares has agreed to acquire Great Plains Bancshares in an all-stock transaction valued at approximately $239.6 million. The move is set to expand the company's footprint into Oklahoma and increase its total network to 43 bank branches.
Why it matters
This acquisition establishes a new geographic foothold in Oklahoma for Third Coast and follows the lender's recent $123 million purchase of Keystone Bancshares in 2025. By increasing its scale to $9 billion in assets, the firm strengthens its regional competitive position across the Southwest.
The transaction is valued at $239.6 million and will result in a combined institution with approximately $9 billion in assets. Third Coast shareholders will hold 78% of the new group, while Great Plains investors will hold 22%.
The players
Third Coast Bancshares
A regional banking institution focused on growth through M&A in Texas and surrounding states.
Great Plains Bancshares
An Oklahoma-based banking entity currently operating 23 branches.
Mark Russell
The current CEO of Great Plains Bancshares who will retain a leadership role in the combined firm.
The details
The acquisition will be financed entirely through Third Coast stock, based on share prices from October 6. The deal adds 23 branches in Oklahoma and Texas to the Third Coast network. Post-acquisition, Great Plains CEO Mark Russell will remain in a leadership role, and two representatives from Great Plains will join the boards of Third Coast and Third Coast Bank.
Timeline
October 6, 2026: Share price used for transaction valuation.
Q1 2027: Expected closing of the acquisition.
Market Landscape
This deal follows the precedent set by Third Coast's 2025 acquisition of Keystone Bancshares. It reflects a clear industry trend of regional lenders consolidating to increase asset scale and enter new state markets.
Operators in the Oklahoma and Texas banking sectors should monitor the integration of these branches, as shifts in local lending capacity often follow such acquisitions. Management teams should track whether the combined entity pivots toward new commercial credit products to utilize its $9 billion asset base.
The takeaway
Large-scale acquisitions serve as a signal for increased competition in regional lending and market territory. Operators should watch for shifts in the competitive landscape as Third Coast integrates 23 new branches before the expected close in Q1 2027.
Further reading
For more on industry consolidation, see the latest updates in Financial Services.
Source note: This article includes information reported by Bankingexchange.
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