COMMERCIAL BANCSHARES, INC.

EXHIBIT 32.1

SARBANES-OXLEY ACT SECTION 906

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

CERTIFICATION PURSUANT TO 18 U.S.C. § 1350

I, Robert E. Beach, the Chief Executive Officer of Commercial Bancshares, Inc. (the “Company”), certify that (i) the Quarterly Report on Form 10-Q for the Company for the quarter ended March 31, 2015 (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Robert E. Beach

President and Chief Executive Officer

Dated:  May 14, 2015