CARMAX INC (KMX) Stock Institutional Trading Activity


CARMAX INC (KMX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Vulcan Value Partners, Ariel Appreciation Fund, Turtle Creek Asset Management, and Giverny Capital. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2020Akre Capital ManagementSell-9057,479,242$706,489
Q3 2020Dodge & Cox Stock FundSell-3504,050$372
Q3 2020Ariel Appreciation FundSell-80,436327,299$30,082
Q3 2020Renaissance Technologies LLCSell-187,40056,000$5,147
Q3 2020Turtle Creek Asset ManagementSell-50,550310,518$28,540
Q3 2020Giverny CapitalBuy12,2371,078,615$99,136
Q3 2020Sequoia FundSell-151,0906,578,390$604,620
Q3 2020Akre Capital ManagementSell-673,8797,480,147$687,500
Q2 2020Dodge & Cox Stock FundSell-5,1004,400$394
Q2 2020Ariel Appreciation FundSell-141,278407,735$36,513
Q2 2020Turtle Creek Asset ManagementSell-156,800361,068$32,334
Q2 2020Giverny CapitalSell-36,2151,066,378$95,494
Q2 2020Sequoia FundSell-2,434,6226,729,480$602,625
Q2 2020Akre Capital ManagementSell-36,3458,154,026$730,193
Q1 2020Dodge & Cox Stock FundSell-3,9009,500$511
Q1 2020Ariel Appreciation FundBuy71,463549,013$29,553
Q1 2020Oakcliff Capital PartnersSell-27,26477,276$4,160
Q1 2020Conifer ManagementBuy272,447272,447$14,666
Q1 2020Turtle Creek Asset ManagementBuy103,568517,868$27,877
Q1 2020Giverny CapitalSell-67,3851,102,593$59,353
Q1 2020Akre Capital ManagementBuy1,442,7208,190,371$440,888
Q1 2020Sequoia FundBuy1,213,3629,164,102$493,304
Q4 2019Ariel Appreciation FundBuy58,588477,550$41,867
Q4 2019Renaissance Technologies LLCSell-220,800243,400$21,339
Q4 2019Turtle Creek Asset ManagementSell-47,100414,300$36,322
Q4 2019Giverny CapitalSell-53,1301,169,978$102,572
Q4 2019Akre Capital ManagementBuy462,3006,747,651$591,567
Q4 2019Sequoia FundSell-1,873,0067,950,740$697,041
Q3 2019Dodge & Cox Stock FundSell-50013,400$1,179
Q3 2019Ariel Appreciation FundBuy1,741418,962$36,869

Frequently asked questions about KMX activity

  • Which institutional owners are buying KMX?

    Institutional owners buying KMX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in KMX activity?

    "Buy" means an investor increased their reported position in KMX compared to the prior reporting period. This reflects growing exposure to CARMAX INC (KMX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in KMX increasing?

    Institutional interest in KMX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.