Great Plains National Bank is the operating bank owned by Great Plains Bancshares, Inc. It serves personal and business customers in Oklahoma and Texas.
The October 2026 agreement proposes merging it into Third Coast Bank while preserving the Great Plains brand as a division. The merger remains pending.
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Ownership & partners
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Latest news
Published Oct 7, 2026Source / event date: Agreement signed October 6, 2026; joint announcement October 7, 2026 at 6:30 a.m. Eastern Time; Form 8-K and exhibits dated October 7, 2026.
Third Coast Bancshares, Inc. announced an all-stock agreement on October 7 to acquire Great Plains Bancshares, Inc. The proposed Oklahoma expansion would create a company with roughly $9 billion in assets. [1]
Bank & fintech · Bank merger agreement
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Policy & official records
Curated library records that name Great Plains National Bank or connect through its linked research. The official source provides full scope and status.
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