Oct 22 (Reuters) - Third Coast Bancshares Inc ( TCBX ):

* THIRD COAST BANCSHARES, INC. ( TCBX ) AND KEYSTONE BANCSHARES, INC.

ANNOUNCE DEFINITIVE MERGER AGREEMENT

* THIRD COAST BANCSHARES INC ( TCBX ): ONCE COMPLETED, COMBINED TOTAL

ASSETS TO EXCEED $6 BILLION

* THIRD COAST BANCSHARES INC ( TCBX ): THIRD COAST WILL ACQUIRE

KEYSTONE IN

A STOCK AND CASH TRANSACTION VALUED AT APPROXIMATELY $123

MILLION

* THIRD COAST BANCSHARES INC ( TCBX ): TRANSACTION IS VALUED AT

APPROXIMATELY $17.99 PER KEYSTONE COMMON SHARE

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