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 2025Matrix Advisors Value FundSell-246,396600,301$17,942,988
Q4 2025Renaissance Technologies LLCSell-403,8006,560,576$196,095,617
Q4 2025Eagle Capital ManagementSell-2,626,31939,910,299$1,192,918,837
Q4 2025Kahn Brothers GroupBuy6457,025$209,977
Q4 2025Cullen Value FundBuy59,553249,554$7,079,853
Q4 2025Yacktman Asset ManagementSell-7,5001,161,500$34,717,235
Q3 2025Yacktman Asset ManagementSell-74,5001,169,000$36,729,980
Q3 2025Dodge & Cox Stock FundBuy1,295,598112,567,918$3,536,883,984
Q3 2025Mairs & Power Growth FundBuy2,2087,600$238,792
Q3 2025Hillman Value FundSell-6,26992,994$2,921,871
Q3 2025Sequoia Financial AdvisorsSell-5,808437,599$13,749,351
Q3 2025Matrix Advisors Value FundBuy23,887846,697$26,603,232
Q3 2025Parnassus Endeavor FundBuy55,9172,045,409$64,266,751
Q3 2025Renaissance Technologies LLCBuy6,052,9236,964,376$218,820,694
Q3 2025First Eagle U.S. ValueBuy21,43835,926,674$1,128,816,092
Q3 2025Eagle Capital ManagementSell-2,24642,536,618$1,336,500,542
Q3 2025Gardner Russo & QuinnSell-112,2552,445,711$76,844,225
Q3 2025Tweedy, Browne Co All Funds (US)Sell-6831,496$989,604
Q3 2025Cullen Value FundSell-65,544190,001$5,871,021
Q2 2025Dodge & Cox Stock FundBuy17,054,579111,272,320$3,971,309,101
Q2 2025Hillman Value FundSell-9,31299,263$3,542,696
Q2 2025Sequoia Financial AdvisorsBuy16,527443,407$15,825,204
Q2 2025Matrix Advisors Value FundBuy94,769822,810$29,366,099
Q2 2025Renaissance Technologies LLCSell-635,456911,453$32,529,758
Q2 2025Parnassus Endeavor FundBuy63,9671,989,492$71,004,969
Q2 2025First Eagle U.S. ValueBuy490,92335,905,236$1,281,457,868
Q2 2025Eagle Capital ManagementSell-233,55142,538,864$1,518,212,069
Q2 2025Gardner Russo & QuinnSell-58,8452,557,966$91,293,790
Q2 2025Kahn Brothers GroupSell-306,380$227,702
Q2 2025Tweedy, Browne Co All Funds (US)Sell-76231,564$1,126,519

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.