MARSH & MCLENNAN COS (MMC) Stock Institutional Trading Activity


MARSH & MCLENNAN COS (MMC) 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 Jensen Investment Management, Renaissance Technologies LLC, Yacktman Asset Management, Sequoia Financial Advisors, and Parnassus Endeavor Fund. 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 2025Jensen Investment ManagementSell-1,322,3281,084,317$201,162,490
Q4 2025Yacktman Asset ManagementBuy1,93519,280$3,576,826
Q4 2025Renaissance Technologies LLCSell-722,700397,600$73,762,752
Q3 2025Jensen Investment ManagementSell-16,9922,406,645$485,011,167
Q3 2025Yacktman Asset ManagementBuy17,34517,345$3,495,538
Q3 2025Mairs & Power Growth FundSell-181,356$273,275
Q3 2025Sequoia Financial AdvisorsSell-166,93817,787$3,584,524
Q3 2025Renaissance Technologies LLCBuy146,3691,120,300$225,774,059
Q3 2025Parnassus Endeavor FundSell-72,7802,586,704$521,298,457
Q3 2025AKO CapitalBuy17,5531,799,753$362,704
Q2 2025Torray FundSell-80070,015$15,308,080
Q2 2025Jensen Investment ManagementSell-206,0492,423,637$529,903,994
Q2 2025Mairs & Power Growth FundSell-751,374$300,411
Q2 2025Sequoia Financial AdvisorsBuy14,285184,725$40,388,282
Q2 2025Renaissance Technologies LLCBuy354,931973,931$212,940,274
Q2 2025Parnassus Endeavor FundSell-137,9932,659,484$581,469,582
Q2 2025AKO CapitalSell-339,5301,782,200$389,660
Q1 2025Torray FundSell-7,06270,815$17,280,984
Q1 2025Jensen Investment ManagementSell-410,8652,629,686$641,722,275
Q1 2025Mairs & Power Growth FundBuy751,449$353,599
Q1 2025AKO CapitalBuy58,9022,121,730$517,766
Q1 2025Sequoia Financial AdvisorsBuy39,931170,440$41,592,404
Q1 2025Renaissance Technologies LLCBuy115,900619,000$151,054,570
Q1 2025Parnassus Endeavor FundSell-771,6642,797,477$682,668,312
Q4 2024Jensen Investment ManagementSell-10,2803,040,551$645,843,438
Q4 2024AKO CapitalBuy89,5942,062,828$438,165
Q4 2024Sequoia Financial AdvisorsBuy15,079130,509$27,721,342
Q4 2024Renaissance Technologies LLCBuy193,200503,100$106,863,471
Q4 2024Parnassus Endeavor FundSell-705,7393,569,141$758,121,240
Q3 2024Jensen Investment ManagementSell-175,4273,050,831$680,609,888

Frequently asked questions about MMC activity

  • Which institutional owners are buying MMC?

    Institutional owners buying MMC 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 MMC activity?

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

  • Is institutional interest in MMC increasing?

    Institutional interest in MMC 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.