Mark F. O’Neil bought 4,800 CarMax shares in the open market on June 24, paying $52.36 per share for a total of about $251,330. Open-market buying is often watched closely because it involves an insider using personal funds at the current market price, rather than receiving stock through compensation or selling for diversification. O’Neil is listed as an insider, which typically means he has access to internal information about company operations and performance, even if he is not the CEO. While a single purchase doesn’t guarantee anything about business results, it can be a useful data point because insiders generally have a better view of how the company is tracking versus expectations than outside investors do. This trade also stands out because it’s part of a cluster of recent insider buying at CarMax. Over the past 30 days, four insiders have reported purchases: Keith Barr bought about $498,250 (June 22), Peter J. Bensen bought about $130,500 (June 22), O’Neil bought about $251,330 (June 24), and Sona Chawla bought about $106,780 (June 25). Multiple insiders buying within days of each other can draw attention because it suggests interest across leadership rather than a one-off transaction.