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
Q2 2021Yacktman Asset ManagementSell-5,5501,518,650$86,593
Q2 2021Kahn Brothers GroupSell-7835,398$307,794
Q2 2021Torray FundSell-444319,492$18,217
Q2 2021Dodge & Cox Stock FundSell-1,216,24683,984,497$4,788,796
Q2 2021Eagle Capital ManagementSell-8,347,68929,778,656$1,697,979
Q2 2021Parnassus Endeavor FundBuy970,96923,063,410$1,315,076
Q2 2021Trian Fund ManagementBuy939,57420,797,466$1,185,872
Q2 2021Hillman Value FundSell-74,140$236
Q2 2021Matrix Private Capital GroupSell-1,5604,540$259
Q2 2021Mairs & Power Growth FundSell-2,7655,747$328
Q2 2021Sequoia Financial AdvisorsSell-29,804153,090$8,729
Q2 2021Matrix Advisors Value FundBuy84,849409,047$23,324
Q2 2021Egerton Capital UKBuy693,86410,144,500$578,439
Q2 2021First Eagle U.S. ValueSell-308,60829,872,460$1,703,328
Q2 2021Gardner Russo & QuinnSell-167,5585,363,742$305,841
Q2 2021Longleaf PartnersSell-3,8614,649,116$265,092
Q2 2021Sound Shore ManagementSell-7,3041,658,724$94,580
Q2 2021Tweedy, Browne Co All Funds (US)Sell-21,8841,123,714$64,074
Q1 2021Yacktman Asset ManagementBuy18,1001,524,200$82,474
Q1 2021Torray FundBuy45,310319,936$17,312
Q1 2021Dodge & Cox Stock FundBuy5,060,03285,200,743$4,610,212
Q1 2021Eagle Capital ManagementSell-3,817,43638,126,345$2,063,017
Q1 2021Parnassus Endeavor FundBuy442,08922,092,441$1,195,422
Q1 2021Hillman Value FundSell-824,147$224
Q1 2021Matrix Private Capital GroupSell-1006,100$330
Q1 2021Mairs & Power Growth FundSell-418,512$461
Q1 2021Sequoia Financial AdvisorsBuy7,877182,894$9,896
Q1 2021Matrix Advisors Value FundBuy35,601324,198$17,542
Q1 2021Renaissance Technologies LLCSell-4,297,100605,676$32,773
Q1 2021Egerton Capital UKSell-1,167,3659,450,636$511,374

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.