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 2023Sequoia Financial AdvisorsBuy1913,914$744,852
Q3 2023Parnassus Endeavor FundSell-83,3784,248,108$808,414,952
Q2 2023AKO CapitalBuy715,777715,777$134,623
Q2 2023Jensen Investment ManagementBuy35,5962,930,194$551,110,888
Q2 2023Renaissance Technologies LLCBuy5,299130,700$24,582
Q2 2023Mairs & Power Growth FundBuy322,172$408,510
Q2 2023Sequoia Financial AdvisorsBuy2893,723$700,267
Q2 2023Parnassus Endeavor FundBuy55,0414,331,486$814,665,887
Q1 2023Torray FundBuy9087,022$14,493,514
Q1 2023Jensen Investment ManagementBuy279,1342,894,598$477,261,318
Q1 2023Renaissance Technologies LLCSell-163,800125,401$20,886
Q1 2023Mairs & Power Growth FundBuy6562,140$356,417
Q1 2023Sequoia Financial AdvisorsSell-443,434$571,960
Q1 2023Viking Global InvestorsSell-749,455257,443$42,877,132
Q1 2023Parnassus Endeavor FundSell-32,0604,276,445$712,241,914
Q4 2022Torray FundSell-9,85386,932$14,385,507
Q4 2022Jensen Investment ManagementBuy398,1792,615,464$432,806,983
Q4 2022Olstein Capital ManagementBuy2,00017,000$2,813
Q4 2022Renaissance Technologies LLCSell-33,800289,201$47,857
Q4 2022Mairs & Power Growth FundBuy481,484$245,572
Q4 2022Sequoia Financial AdvisorsBuy1,2043,478$575,554
Q4 2022Parnassus Endeavor FundSell-18,3364,308,505$712,971,407
Q3 2022Torray FundBuy1,20096,785$14,449
Q3 2022Jensen Investment ManagementBuy179,4852,217,285$331,018
Q3 2022Sequoia Financial AdvisorsSell-1902,274$339
Q3 2022Olstein Capital ManagementSell-1,00015,000$3,461
Q3 2022Renaissance Technologies LLCSell-350,000323,001$48,221
Q3 2022Viking Global InvestorsSell-1,821,7051,006,898$150,320
Q3 2022Parnassus Endeavor FundBuy230,2184,326,841$645,954
Q2 2022Jensen Investment ManagementBuy439,4852,037,800$316,368

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.