Attached files

file filename
EX-95.1 - EX-95.1 - UNITED STATES LIME & MINERALS INCuslm-20201231xex95d1.htm
EX-32.2 - EX-32.2 - UNITED STATES LIME & MINERALS INCuslm-20201231xex32d2.htm
EX-31.2 - EX-31.2 - UNITED STATES LIME & MINERALS INCuslm-20201231xex31d2.htm
EX-31.1 - EX-31.1 - UNITED STATES LIME & MINERALS INCuslm-20201231xex31d1.htm
EX-23.1 - EX-23.1 - UNITED STATES LIME & MINERALS INCuslm-20201231xex23d1.htm
EX-21.1 - EX-21.1 - UNITED STATES LIME & MINERALS INCuslm-20201231xex21d1.htm
EX-4.1 - EX-4.1 - UNITED STATES LIME & MINERALS INCuslm-20201231xex4d1.htm
10-K - 10-K - UNITED STATES LIME & MINERALS INCuslm-20201231x10k.htm

EXHIBIT 32.1

SECTION 1350 CERTIFICATION BY THE CHIEF EXECUTIVE OFFICER

I, Timothy W. Byrne, Chief Executive Officer of United States Lime & Minerals, Inc. (the “Company”), hereby certify that, to my knowledge:

(1)The Company’s Annual Report on Form 10-K for the year ended December 31, 2020 (the “Form 10-K”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: February 26, 2021

/s/ TIMOTHY W. BYRNE

Timothy W. Byrne

President and Chief Executive Officer