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
Q3 2024Mairs & Power Growth FundBuy361,374$306,526
Q3 2024AKO CapitalBuy486,2531,973,234$440,209
Q3 2024Sequoia Financial AdvisorsBuy13,405115,430$25,751,316
Q3 2024Renaissance Technologies LLCSell-29,700309,900$69,135,591
Q3 2024Parnassus Endeavor FundBuy85,7544,274,880$953,682,979
Q2 2024Torray FundBuy11,99377,877$16,410,241
Q2 2024Jensen Investment ManagementBuy40,1823,226,258$679,837,086
Q2 2024AKO CapitalBuy211,9301,486,981$313,337
Q2 2024Mairs & Power Growth FundSell-8401,338$281,943
Q2 2024Sequoia Financial AdvisorsBuy15,565102,025$21,498,747
Q2 2024Renaissance Technologies LLCBuy59,581339,600$71,560,512
Q2 2024Parnassus Endeavor FundSell-29,0424,189,126$882,732,631
Q1 2024Torray FundSell-21,13865,884$17,924,792
Q1 2024Jensen Investment ManagementBuy237,0713,186,076$656,267,934
Q1 2024AKO CapitalBuy93,8091,275,051$262,635
Q1 2024Renaissance Technologies LLCSell-82,381280,019$57,678
Q1 2024Mairs & Power Growth FundBuy192,178$448,624
Q1 2024Sequoia Financial AdvisorsSell-4,71086,460$17,808,977
Q1 2024Parnassus Endeavor FundSell-41,3994,218,168$868,858,245
Q4 2023Jensen Investment ManagementSell-67,4712,949,005$558,747,977
Q4 2023AKO CapitalBuy303,9671,181,242$223,810
Q4 2023Olstein Capital ManagementSell-10,0006,000$1,137
Q4 2023Renaissance Technologies LLCBuy231,700362,400$68,664
Q4 2023Mairs & Power Growth FundSell-132,159$409,066
Q4 2023Sequoia Financial AdvisorsBuy87,25691,170$17,274,083
Q4 2023Viking Global InvestorsSell-19,737237,706$45,038,156
Q4 2023Parnassus Endeavor FundBuy11,4594,259,567$807,060,159
Q3 2023Jensen Investment ManagementBuy86,2823,016,476$574,035,383
Q3 2023AKO CapitalBuy161,498877,275$166,945
Q3 2023Olstein Capital ManagementSell-1,00016,000$3,045

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.