# Third Coast Bancshares, Inc. (TCBX) — merger [completed]
Source: SEC API (secapi.ai) · situation sit_4ceacc2b4a7f5b4c8fe3 · retrieved 2026-08-11T15:52:28.196Z

## Overview
Third Coast Bancshares, Inc. is a savings institution that operates as a bank holding company.

On January 23, 2026, Third Coast Bancshares, Inc. held a special shareholder meeting to vote on the proposed merger under the Agreement and Plan of Reorganization dated October 22, 2025. Under the transaction, Arch Merger Sub, Inc. will merge with and into Keystone Bancshares, Inc., with Keystone surviving as a wholly owned subsidiary of Third Coast. Shareholders approved the issuance of Third Coast common stock in connection with the merger, with 8,153,269 votes in favor, 424,652 against, and 821 abstentions. Completion of the merger remains subject to satisfaction or waiver of closing conditions set forth in the Merger Agreement.

## Terms
- Counterparty: Keystone Bancshares, Inc. · Consideration: stock

## Key dates
- Announced 2026-01-16 · Record 2025-12-18 · Vote 2026-01-23 · Completed 2026-02-02

## Timeline
- 2026-01-16 · 425 (0001193125-26-015450): 425 - Third Coast Bancshares, Inc. — *Third Coast Bancshares, Inc. is a Texas-based savings institution holding company and parent of Third Coast Bank, a Texas banking association.* Third Coast Bancshares, Inc. entered into an Agreement and Plan of Reorganization on October 22, 2025, to acquire Keystone Bancshares, Inc. in an all-stock merger. Third Coast filed a Form S-4 registration statement on November 26, 2025 (amended December 18, 2025 and declared effective December 19, 2025), containing a joint proxy statement/prospectus. Third Coast shareholders are scheduled to vote on January 23, 2026, and Keystone shareholders on January 29, 2026. The joint proxy statement/prospectus was mailed to shareholders on or about December 23, 2025. On January 16, 2026, Third Coast filed supplemental disclosures in response to demand letters from shareholders alleging omissions of material information, though Third Coast and Keystone deny the allegations and assert no additional disclosure was legally required.
  https://www.sec.gov/Archives/edgar/data/1781730/0001193125-26-015450.txt
- 2026-01-23 · 425 (0001193125-26-021144): 425 - Third Coast Bancshares, Inc. — *Third Coast Bancshares, Inc. is a savings institution that operates as a bank holding company.* On January 23, 2026, Third Coast Bancshares, Inc. held a special shareholder meeting to vote on the proposed merger under the Agreement and Plan of Reorganization dated October 22, 2025. Under the transaction, Arch Merger Sub, Inc. will merge with and into Keystone Bancshares, Inc., with Keystone surviving as a wholly owned subsidiary of Third Coast. Shareholders approved the issuance of Third Coast common stock in connection with the merger, with 8,153,269 votes in favor, 424,652 against, and 821 abstentions. Completion of the merger remains subject to satisfaction or waiver of closing conditions set forth in the Merger Agreement.
  https://www.sec.gov/Archives/edgar/data/1781730/0001193125-26-021144.txt
- 2026-02-02 · 8-K (0001193125-26-033737): 8-K 8-K
  https://www.sec.gov/Archives/edgar/data/1781730/000119312526033737/tcbx-20260201.htm

## Citations
- 0001193125-26-015450 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000119312526015450
- 0001193125-26-021144 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000119312526021144
- 0001193125-26-033737 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000119312526033737