X0306 4 2021-11-08 0 0001600438 GMS Inc. GMS 0001674921 Apolinsky Craig D GMS INC. 100 CRESCENT CENTRE PARKWAY, SUITE 800 TUCKER GA 30084 0 1 0 0 VP, GC and Corporate Secretary Common Stock 2021-11-08 4 S 0 8367 58.10 D 16814 D The sale of these shares was completed in accordance with a sales plan under Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $57.40 to $59.07, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, 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 range set forth in this footnote. /s/ Craig D. Apolinsky 2021-11-09