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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- MARSH & MCLENNAN COS (MMC) stock institutional ownership
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q3 2018 | Torray Fund | Buy | 250 | 163,409 | $13,517 |
| Q3 2018 | Sound Shore Management | Buy | 204,044 | 1,813,515 | $150,014 |
| Q2 2018 | Torray Fund | Sell | -261 | 163,159 | $13,374 |
| Q2 2018 | Sound Shore Management | Sell | -54,907 | 1,609,471 | $131,928 |
| Q1 2018 | Mairs & Power Growth Fund | Sell | -900 | 2,466 | $204 |
| Q1 2018 | Torray Fund | Buy | 53 | 163,420 | $13,497 |
| Q1 2018 | Sound Shore Management | Buy | 114,381 | 1,664,378 | $137,461 |
| Q1 2018 | Renaissance Technologies LLC | Sell | -38,000 | 75,700 | $6,252 |
| Q4 2017 | Torray Fund | Sell | -5,417 | 163,367 | $13,296 |
| Q4 2017 | Sound Shore Management | Buy | 11,505 | 1,549,997 | $126,154 |
| Q4 2017 | Olstein Capital Management | Sell | -5,000 | 44,800 | $3,646 |
| Q4 2017 | Viking Global Investors | Sell | -214,855 | 483,287 | $39,335 |
| Q3 2017 | Torray Fund | Sell | -22,607 | 168,784 | $14,146 |
| Q3 2017 | Sound Shore Management | Sell | -174,656 | 1,538,492 | $128,941 |
| Q3 2017 | Olstein Capital Management | Sell | -17,200 | 49,800 | $4,174 |
| Q2 2017 | Mairs & Power Growth Fund | Sell | -1,644 | 3,366 | $262 |
| Q2 2017 | Torray Fund | Sell | -224 | 191,391 | $14,921 |
| Q2 2017 | Sound Shore Management | Sell | -338,593 | 1,713,148 | $133,557 |
| Q2 2017 | Dodge & Cox Stock Fund | Sell | -200 | 3,660 | $285 |
| Q2 2017 | Renaissance Technologies LLC | Sell | -190,500 | 113,700 | $8,864 |
| Q2 2017 | Viking Global Investors | Sell | -998,659 | 698,142 | $54,427 |
| Q1 2017 | Torray Fund | Sell | -1 | 191,615 | $14,158 |
| Q1 2017 | Sound Shore Management | Sell | -39,010 | 2,051,741 | $151,603 |
| Q1 2017 | Olstein Capital Management | Sell | -5,000 | 67,000 | $4,951 |
| Q1 2017 | Renaissance Technologies LLC | Sell | -690,900 | 304,200 | $22,477 |
| Q4 2016 | Torray Fund | Buy | 405 | 191,616 | $12,951 |
| Q4 2016 | Sound Shore Management | Buy | 394,577 | 2,090,751 | $141,314 |
| Q4 2016 | Dodge & Cox Stock Fund | Sell | -1,500 | 3,860 | $261 |
| Q4 2016 | Renaissance Technologies LLC | Buy | 240,600 | 995,100 | $67,259 |
| Q4 2016 | Viking Global Investors | Sell | -855,270 | 1,696,801 | $114,687 |
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.