EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. §1350, AS ADOPTED

PURSUANT TO §906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Spire Corporation (the “Company”) on Form 10-Q (the “Report”) for the period ended March 31, 2013 as filed with the Securities and Exchange Commission on the date hereof, I, Roger G. Little, Chairman of the Board, Chief Executive Officer and President of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	May 10, 2013	By:	/s/ Roger G. Little
			Roger G. Little
			Chairman of the Board Chief Executive Office and President