X0306 4 2020-08-01 0 0001600438 GMS Inc. GMS 0001176402 BROWNING PETER C GMS INC. 100 CRECENT CENTRE PARKWAY. SUITE 800 TUCKER GA 30084 1 0 0 0 Common Stock 2020-08-01 4 M 0 4794 A 16513 D Restricted Stock Units 2020-08-01 4 M 0 4794 0 D Common Stock 4794 0 D Restricted Stock Units 2020-08-01 4 A 0 4481 0 A Common Stock 4481 4481 D Restricted stock units vested and converted to shares of common stock on a one-for-one basis. Includes the receipt of 4,794 shares of common stock the reporting person elected to defer pursuant to the Deferred Compensation Plan for Non-Employee Directors. On August 1, 2019, the reporting person was granted 4,794 restricted stock units that vested on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock. Subject to the reporting person's continued service as a director of the issuer through the applicable vesting date, these restricted stock units are scheduled to vest on the first anniversary of the grant date and will be settled, with respect to vested restricted stock units, in shares of the issuer's common stock no later than 30 days after each applicable vesting date. /s/ Craig D. Apolinsky, Attorney-in-Fact for Peter C. Browning 2020-08-04