COMCAST CORP-CLASS A (CMCSA) Stock Institutional Trading Activity


COMCAST CORP-CLASS A (CMCSA) 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 Eagle Capital Management, Renaissance Technologies LLC, Matrix Advisors Value Fund, Cullen Value Fund, and Yacktman Asset Management. 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 2021Hillman Value FundSell-5529,059$456
Q4 2021Olstein Capital ManagementBuy27,000195,000$9,814
Q4 2021Sequoia Financial AdvisorsBuy150,375198,732$10,002
Q4 2021Matrix Advisors Value FundBuy114,325527,747$26,562
Q4 2021Renaissance Technologies LLCBuy142,200747,876$37,641
Q4 2021Third PointBuy2,000,0002,000,000$100,660
Q4 2021Viking Global InvestorsBuy4,036,46814,213,091$715,345
Q4 2021First Eagle U.S. ValueSell-55,42129,394,424$1,479,421
Q4 2021Gardner Russo & QuinnSell-157,8445,031,770$253,249
Q4 2021Disciplined Growth InvestorsBuy8,7928,792$443
Q4 2021Longleaf PartnersSell-2,494,3869,531$480
Q4 2021Tweedy, Browne Co All Funds (US)Sell-63,0941,058,753$53,287
Q3 2021Yacktman Asset ManagementSell-9,2001,509,450$84,424
Q3 2021Torray FundBuy482319,974$17,896
Q3 2021Dodge & Cox Stock FundSell-276,42383,708,074$4,681,793
Q3 2021Eagle Capital ManagementSell-913,27028,865,386$1,614,441
Q3 2021Parnassus Endeavor FundBuy1,639,06824,702,478$1,381,610
Q3 2021Trian Fund ManagementSell-806,05019,991,416$1,118,120
Q3 2021Matrix Private Capital GroupBuy2844,824$270
Q3 2021Mairs & Power Growth FundSell-1505,597$313
Q3 2021Hillman Value FundBuy5,4719,611$537
Q3 2021Sequoia Financial AdvisorsSell-104,73348,357$2,705
Q3 2021Matrix Advisors Value FundBuy4,375413,422$23,123
Q3 2021Viking Global InvestorsBuy131,55810,176,623$569,179
Q3 2021Egerton Capital UKBuy6,130,33316,274,833$910,251
Q3 2021First Eagle U.S. ValueSell-422,61529,449,845$1,647,130
Q3 2021Gardner Russo & QuinnSell-174,1285,189,614$290,255
Q3 2021Longleaf PartnersSell-2,145,1992,503,917$140,044
Q3 2021Sound Shore ManagementSell-7,0331,651,691$92,379
Q3 2021Tweedy, Browne Co All Funds (US)Sell-1,8671,121,847$62,745

Frequently asked questions about CMCSA activity

  • Which institutional owners are buying CMCSA?

    Institutional owners buying CMCSA 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 CMCSA activity?

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

  • Is institutional interest in CMCSA increasing?

    Institutional interest in CMCSA 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.