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
Q3 2019Oakcliff Capital PartnersSell-27,000104,540$9,200
Q3 2019Turtle Creek Asset ManagementSell-16,300461,400$40,603
Q3 2019Renaissance Technologies LLCSell-886,200464,200$40,850
Q3 2019Giverny CapitalBuy3,0031,223,108$107,634
Q3 2019Akre Capital ManagementBuy207,3706,285,351$553,111
Q3 2019Sequoia FundSell-112,9059,823,746$864,490
Q2 2019Dodge & Cox Stock FundSell-9,30013,900$1,207
Q2 2019Ariel Appreciation FundBuy74,420417,221$36,227
Q2 2019Turtle Creek Asset ManagementSell-173,350477,700$41,479
Q2 2019Giverny CapitalBuy31,3071,220,105$105,942
Q2 2019Sequoia FundSell-1,531,0849,936,651$862,799
Q1 2019Ariel Appreciation FundBuy342,801342,801$23,928
Q1 2019Oakcliff Capital PartnersSell-24,500131,540$9,181
Q1 2019Turtle Creek Asset ManagementSell-29,363651,050$45,443
Q1 2019Giverny CapitalBuy33,2051,188,798$82,978
Q1 2019Akre Capital ManagementBuy300,8006,077,981$424,243
Q1 2019Sequoia FundSell-161,05911,467,735$800,448
Q4 2018Turtle Creek Asset ManagementBuy189,850680,413$42,682
Q4 2018Giverny CapitalSell-13,9121,155,593$72,490
Q4 2018Akre Capital ManagementBuy522,6905,777,181$362,403
Q4 2018Sequoia FundSell-114,00511,628,794$729,474
Q3 2018Oakcliff Capital PartnersSell-80,736156,040$11,652
Q3 2018Turtle Creek Asset ManagementBuy490,563490,563$36,630
Q3 2018Giverny CapitalSell-100,3691,169,505$87,327
Q3 2018Sequoia FundSell-207,30511,742,799$876,835
Q2 2018Dodge & Cox Stock FundSell-40023,200$1,691
Q2 2018Giverny CapitalBuy178,2861,269,874$92,536
Q2 2018Akre Capital ManagementBuy92,3255,254,491$382,895
Q2 2018Sequoia FundSell-2,47111,950,104$870,804
Q1 2018Dodge & Cox Stock FundSell-2,40023,600$1,462

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.