---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-420491"
form_type: "8-K"
ticker: "TCBX"
cik: "0001781730"
company_name: "Third Coast Bancshares, Inc."
filed_at: "2026-10-13T20:30:17+00:00"
generated_at: "2026-10-13T20:31:10.495148+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Third Coast to acquire Oklahoma's Great Plains Bancshares in all-stock deal; 5,570,352 TCBX shares issued

## Summary
- Third Coast Bancshares (TCBX) and Great Plains Bancshares signed an Agreement and Plan of Reorganization dated Oct 6, 2026; outside termination date is Sept 30, 2027.
- Consideration is a fixed 5,570,352 shares of TCBX Common Stock for all Great Plains stock; the exchange ratio is cut if Great Plains capital less intangibles is below $153,300,000.
- Great Plains shareholders beneficially owning roughly 27.6% of its stock signed a voting agreement to back the merger and forgo transfers.
- Great Plains must pay a $11,981,827 termination fee in certain cases, including alternative acquisition proposals or a board recommendation change.
- Todd Taylor and Paul M. Dickinson (or other agreed Great Plains directors) will join the TCBX and Third Coast Bank boards, each expanded by two seats.

## SEC filing metadata
- accession: 0001193125-26-420491
- form_type: 8-K
- ticker: TCBX
- cik: 0001781730
- company_name: Third Coast Bancshares, Inc.
- filed_at: 2026-10-13T20:30:17+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1781730/000119312526420491/0001193125-26-420491-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1781730/000119312526420491/d160832d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-420491
- JSON: https://secwatch.observer/filing/0001193125-26-420491.json
- Plain text: https://secwatch.observer/filing/0001193125-26-420491.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.