UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 Commission file number: 001-36451 Quest Resource Holding Corporation (Exact Name of Registrant as Specified in its Charter) Nevada 51-0665952 (State or other Jurisdiction of (I.R.S. Employer Incorporation or Organization) Identification No.) 3481 Plano Parkway The Colony, Texas 75056 (Address ...