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
Q3 2024Sequoia Financial AdvisorsBuy145,012390,738$16,321,110
Q3 2024Matrix Advisors Value FundBuy6,218730,834$30,526,936
Q3 2024Parnassus Endeavor FundBuy68,1391,920,800$80,231,816
Q3 2024Eagle Capital ManagementSell-63,56718,601,778$776,996,267
Q3 2024First Eagle U.S. ValueSell-75331,830,891$1,329,576,336
Q3 2024Viking Global InvestorsSell-10,985,9833,092,685$129,181,452
Q3 2024Gardner Russo & QuinnSell-94,8952,969,927$124,053,844
Q3 2024Tweedy, Browne Co All Funds (US)Sell-2,16035,481$1,482,041
Q3 2024Cullen Value FundBuy611237,757$9,931,119
Q2 2024Yacktman Asset ManagementSell-7,5001,421,000$55,646,360
Q2 2024Dodge & Cox Stock FundSell-404,59672,739,344$2,848,472,711
Q2 2024Mairs & Power Growth FundSell-1,2695,554$217,495
Q2 2024Hillman Value FundSell-473149,043$5,836,524
Q2 2024Sequoia Financial AdvisorsSell-787245,726$9,622,623
Q2 2024Matrix Advisors Value FundBuy56,104724,616$28,376,000
Q2 2024Parnassus Endeavor FundBuy392,2451,852,661$72,550,205
Q2 2024Eagle Capital ManagementSell-257,61418,665,345$730,934,910
Q2 2024First Eagle U.S. ValueSell-164,67431,831,644$1,246,527,179
Q2 2024Gardner Russo & QuinnSell-29,4223,064,822$120,018,420
Q2 2024Tweedy, Browne Co All Funds (US)Sell-2,24037,641$1,474,022
Q2 2024Cullen Value FundBuy38237,146$9,286,620
Q1 2024Yacktman Asset ManagementSell-17,0001,428,500$61,925,475
Q1 2024Dodge & Cox Stock FundSell-1,458,26873,143,940$3,170,789,799
Q1 2024Olstein Capital ManagementSell-17,00090,000$3,902
Q1 2024Renaissance Technologies LLCSell-4,664,7671,546,909$67,059
Q1 2024Hancock Classic ValueSell-655,135$222,602
Q1 2024Mairs & Power Growth FundBuy1,8626,823$295,777
Q1 2024Hillman Value FundBuy142,991149,516$6,481,519
Q1 2024Sequoia Financial AdvisorsSell-44,790246,513$10,686,355
Q1 2024Matrix Advisors Value FundBuy33,008668,512$28,979,995

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.