X0609 4 2026-08-31 0 0001442236 Quest Resource Holding Corp QRHC 0001685481 Tomolonius Sarah false C/O QUEST RESOURCE HOLDING CORPORATION 433 E. LAS COLINAS BOULEVARD, SUITE 675 IRVING TX 75039 1 0 0 0 0 Common Stock 2026-08-31 4 A 0 2500 1.40 A 84100 D Common Stock 43710 D These reported securities represent restricted stock units ("RSUs") granted on August 31, 2026 under the Issuer's 2024 Incentive Compensation Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs are scheduled to vest on March 1, 2027. Includes (a) 10,998 RSUs that are scheduled to fully vest on March 1, 2027, (b) 28,767 RSUs that are scheduled to fully vest on August 13, 2027 and (c) 44,335 shares of common stock beneficially owned by the Reporting Person. The reported securities include (a) 17,429 deferred stock units ("DSUs") granted under the Issuer's 2012 Incentive Compensation Plan and (b) 26,281 DSUs granted under the Issuer's 2024 Incentive Compensation Plan. The shares of common stock underlying such DSUs shall be issued upon the Reporting Person's separation from service with the Issuer. /s/ Brett W. Johnston, as Attorney-in-Fact 2026-09-02