Stock Ownership/MRSH

MARSH & MCLENNAN COS INC (MRSH): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in MRSH · Financials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
39
13F filers
Aggregate Value
$5.3B
Across holders
Last Price
$194.67
2026-08-24
Sector
Financials
GICS
Quarterly fund activity18 increased20 reduced4 exited
Full exits: RENAISSANCE TECHNOLOGIES LLC, EMINENCE CAPITAL LLC, Holocene Advisors, LP, YACKTMAN ASSET MANAGEMENT CO/IL
Institutional Holders of MRSH
↗
39 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
HARRIS ASSOCIATES L P
CIK 0000813917
Institutional Manager8.69M$1.4B27.1%1.9%Added+$1.4BQ2 2026
Clearbridge Investments, LLC
CIK 0001348883
Hedge Fund4.71M$784.3M14.7%0.6%Reduced$-1.3BQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund4.17M$695.0M13.0%0.3%Added+$119.3MQ2 2026
EdgePoint Investment Group Inc.
CIK 0001481669
Hedge Fund3.82M$636.7M11.9%4.8%Added—Q2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund2.61M$432.1M8.1%0.2%Reduced+$431.2MQ2 2026
PRIMECAP MANAGEMENT CO/CA/
CIK 0000763212
Institutional Manager2.15M$357.5M6.7%0.2%Added+$237.9MQ2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLC
CIK 0001556921
Hedge Fund1.33M$221.8M4.2%0.9%Added+$39.8MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund1.04M$173.9M3.3%0.1%Added+$165.8MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund840K$139.9M2.6%0.1%Reduced$-101.3MQ2 2026
MARKEL CORP (MKL)
CIK 0001096343
Hedge Fund764K$127.3M2.4%1.0%Unchanged+$120.4MQ2 2026
HARRIS ASSOCIATES L PAdded
Institutional Manager
$1.4B· 27.1% of total· 1.9% port· 8.69M sh· +$1.4B QoQ· Q2 2026
Clearbridge Investments, LLCReduced
Hedge Fund
$784.3M· 14.7% of total· 0.6% port· 4.71M sh· $-1.3B QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$695.0M· 13.0% of total· 0.3% port· 4.17M sh· +$119.3M QoQ· Q2 2026
EdgePoint Investment Group Inc.Added
Hedge Fund
$636.7M· 11.9% of total· 4.8% port· 3.82M sh· — QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$432.1M· 8.1% of total· 0.2% port· 2.61M sh· +$431.2M QoQ· Q2 2026
PRIMECAP MANAGEMENT CO/CA/Added
Institutional Manager
$357.5M· 6.7% of total· 0.2% port· 2.15M sh· +$237.9M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCAdded
Hedge Fund
$221.8M· 4.2% of total· 0.9% port· 1.33M sh· +$39.8M QoQ· Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$173.9M· 3.3% of total· 0.1% port· 1.04M sh· +$165.8M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$139.9M· 2.6% of total· 0.1% port· 840K sh· $-101.3M QoQ· Q2 2026
MARKEL CORP (MKL)Unchanged
Hedge Fund
$127.3M· 2.4% of total· 1.0% port· 764K sh· +$120.4M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDReduced
Hedge Fund
$97.3M· 1.8% of total· 0.5% port· 589K sh· $-5.6M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$42.3M· 0.8% of total· 0.1% port· 254K sh· +$34.0M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$38.5M· 0.7% of total· 0.0% port· 231K sh· +$36.4M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$33.7M· 0.6% of total· 0.0% port· 202K sh· +$33.4M QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$26.3M· 0.5% of total· 0.1% port· 158K sh· $-7.8M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$15.1M· 0.3% of total· 0.1% port· 91K sh· — QoQ· Q2 2026
TUDOR INVESTMENT CORP ET ALAdded
Hedge Fund
$12.6M· 0.2% of total· 0.0% port· 76K sh· +$12.1M QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$11.9M· 0.2% of total· 0.0% port· 72K sh· +$11.5M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$11.9M· 0.2% of total· 0.0% port· 71K sh· $-1.4M QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$5.1M· 0.1% of total· 0.0% port· 30K sh· +$2.9M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$5.0M· 0.1% of total· 0.0% port· 30K sh· +$1.8M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$3.8M· 0.1% of total· 0.0% port· 23K sh· +$2.3M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$3.5M· 0.1% of total· 0.0% port· 21K sh· +$3.5M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$3.3M· 0.1% of total· 0.0% port· 20K sh· — QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALReduced
Institutional Manager
$3.1M· 0.1% of total· 0.0% port· 19K sh· $-159K QoQ· Q2 2026
Bridgewater Associates, LPAdded
Hedge Fund
$3.0M· 0.1% of total· 0.0% port· 18K sh· — QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Reduced
Hedge Fund
$2.4M· 0.0% of total· 0.0% port· 14K sh· $-56.6M QoQ· Q2 2026
PineBridge Investments, L.P.Reduced
Hedge Fund
$2.4M· 0.0% of total· 0.0% port· 12K sh· $-2.5M QoQ· Q3 2025
TCW GROUP INCReduced
Hedge Fund
$2.2M· 0.0% of total· 0.0% port· 13K sh· +$442K QoQ· Q2 2026
Bridgewater Advisors Inc.Reduced
Hedge Fund
$921K· 0.0% of total· 0.1% port· 5K sh· $-17K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$731K· 0.0% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCAdded
Hedge Fund
$561K· 0.0% of total· 0.0% port· 3K sh· $-3.2M QoQ· Q2 2026
Fulcrum Asset Management LLPReduced
Hedge Fund
$435K· 0.0% of total· 0.0% port· 3K sh· $-18K QoQ· Q2 2026
Fisher Asset Management, LLCAdded
Institutional Manager
$373K· 0.0% of total· 0.0% port· 2K sh· +$33K QoQ· Q2 2026
Verition Fund Management LLCReduced
Hedge Fund
$314K· 0.0% of total· 0.0% port· 2K sh· $-324K QoQ· Q2 2026
Hudson Bay Capital Management LPAdded
Hedge Fund
$217K· 0.0% of total· 0.0% port· 1K sh· — QoQ· Q2 2026
BAILLIE GIFFORD & COReduced
Institutional Manager
$85K· 0.0% of total· 0.0% port· 511 sh· $-1.1M QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$49K· 0.0% of total· 0.0% port· 295 sh· $-984K QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$42K· 0.0% of total· 0.0% port· 251 sh· $-162K QoQ· Q2 2026
1–10 of 39
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