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 August 31, 2023 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT ☐ OF 1934 Commission File Number: 1-31420 CARMAX, INC. (Exact name of registrant as specified in its charter) Virginia 54-1821055 (State or other jurisdiction of incorporation) (I.R.S. Employer Identification ...