Form 4 Filing for Carmax Inc.

This filing details transactions made by Mark F. ONeil, a director at Carmax Inc. On June 24, 2026, ONeil acquired 4,800 shares of Common Stock through a direct transaction with a post-transaction share count of 29,490. Additionally, 4,800 shares were acquired indirectly through a trust, resulting in 4,800 shares held. The shares held by his spouse, totaling 16,684 shares, are also noted. The filing also includes a power of attorney document, appointing attorneys-in-fact to execute Section 16 reporting forms on behalf of ONeil.