X0306 4 2020-12-04 0 0000082020 UNITED STATES LIME & MINERALS INC USLM 0001204973 BYRNE TIMOTHY W 5429 LBJ FREEWAY SUITE 230 DALLAS TX 75240 1 1 0 0 President & CEO USLM Common Stock 2020-12-04 4 S 0 200 109 D 34004 D USLM Common Stock 2020-12-04 4 S 0 1597 109.59 D 32407 D USLM Common Stock 2020-12-07 4 S 0 2203 109.55 D 30204 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.50 to $110.02, inclusive. The reporting person undertakes to provide United States Lime & Minerals, Inc., any security holder of United States Lime & Minerals, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes 1 & 2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.50 to $110.25, inclusive. M Michael Owens (POA) 2020-12-08