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
Q1 2016Dodge & Cox Stock FundSell-2,86573,640$3,763
Q1 2016Greenbrier Partners Capital ManagementSell-100,000150,000$7,665
Q1 2016Giverny CapitalBuy144,426825,093$42,162
Q1 2016Akre Capital ManagementBuy900,9624,318,321$220,666
Q4 2015Dodge & Cox Stock FundSell-502,28376,505$4,129
Q4 2015Renaissance Technologies LLCSell-483,700167,500$9,040
Q4 2015Giverny CapitalBuy27,833680,667$36,736
Q4 2015Akre Capital ManagementBuy643,6993,417,359$184,435
Q3 2015Dodge & Cox Stock FundSell-960578,788$34,334
Q3 2015Renaissance Technologies LLCBuy605,300651,200$38,629
Q3 2015Giverny CapitalBuy119,650652,834$38,726
Q3 2015Akre Capital ManagementBuy1,073,6602,773,660$164,534
Q3 2015Greenbrier Partners Capital ManagementSell-26,732250,000$14,830
Q2 2015Dodge & Cox Stock FundSell-6,099,173579,748$38,385
Q2 2015Renaissance Technologies LLCSell-102,20045,900$3,039
Q2 2015Giverny CapitalBuy26,433533,184$35,302
Q1 2015Mairs & Power Growth FundSell-8753,000$207
Q1 2015Dodge & Cox Stock FundSell-821,6506,678,921$460,912
Q1 2015Giverny CapitalBuy506,751506,751$34,971
Q4 2014Dodge & Cox Stock FundSell-111,5397,500,571$499,388
Q4 2014Akre Capital ManagementBuy505,0001,700,000$113,186
Q3 2014Greenbrier Partners Capital ManagementSell-23,268276,732$12,854
Q3 2014Akre Capital ManagementBuy595,0001,195,000$55,508
Q3 2014Dodge & Cox Stock FundSell-112,4007,612,110$353,583
Q2 2014Mairs & Power Growth FundSell-4,1003,875$202
Q2 2014Akre Capital ManagementBuy400,000600,000$31,206
Q2 2014Dodge & Cox Stock FundBuy86,3007,724,510$401,752
Q1 2014Akre Capital ManagementBuy100,000200,000$9,360
Q1 2014Dodge & Cox Stock FundSell-16,8177,638,210$357,468
Q4 2013Mairs & Power Growth FundBuy7,9757,975$375

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.