Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in MRSH held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 39.5M | $6.58B | -6.1% | 8.278% | 0.10% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 31.5M | $5.25B | +0.0% | 6.595% | 0.11% |
| 3 | STATE STREET CORP | 22.4M | $3.73B | +1.5% | 4.694% | 0.06% |
| 4 | Capital World Investors | 18.1M | $3.02B | +0.9% | 3.798% | 0.36% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | 17.0M | $2.83B | -2.3% | 3.557% | 0.49% |
| 6 | Capital International Investors | 15.7M | $2.62B | +0.1% | 3.296% | 0.54% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 13.5M | $2.25B | +0.8% | 2.831% | 0.12% |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | 12.6M | $2.10B | +1.1% | 2.634% | 0.09% |
| 9 | Capital Research Global Investors | 11.0M | $1.83B | -2.9% | 2.300% | 0.26% |
| 10 | HARRIS ASSOCIATES L P | 8.7M | $1.45B | +68.1% | 1.820% | 1.92% |
| 11 | Artisan Partners Limited Partnership | 7.3M | $1.21B | +49.1% | 1.523% | 1.92% |
| 12 | FMR LLC | 7.0M | $1.16B | -31.7% | 1.457% | 0.05% |
| 13 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 6.5M | $1.09B | -20.6% | 1.364% | 0.35% |
| 14 | MORGAN STANLEY | 6.3M | $1.05B | -2.5% | 1.323% | 0.06% |
| 15 | NORGES BANK | 6.3M | $1.04B | β | 1.311% | 0.10% |
| 16 | AMERIPRISE FINANCIAL INC | 5.5M | $922.1M | +0.9% | 1.160% | 0.19% |
| 17 | NORTHERN TRUST CORP | 4.9M | $814.7M | -1.6% | 1.024% | 0.09% |
| 18 | JPMORGAN CHASE & CO | 4.7M | $788.6M | -22.4% | 0.991% | 0.04% |
| 19 | Clearbridge Investments, LLC | 4.7M | $784.3M | -26.7% | 0.986% | 0.65% |
| 20 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | 4.6M | $766.3M | -11.3% | 0.963% | 0.14% |
| 21 | Invesco Ltd. | 4.3M | $717.6M | +10.8% | 0.902% | 0.06% |
| 22 | GOLDMAN SACHS GROUP INC | 4.2M | $704.8M | +15.1% | 0.886% | 0.06% |
| 23 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 4.2M | $695.0M | +20.7% | 0.874% | 0.31% |
| 24 | DEUTSCHE BANK AG\ | 4.1M | $685.6M | +11.1% | 0.862% | 0.20% |
| 25 | Ninety One UK Ltd | 4.0M | $661.9M | -1.4% | 0.832% | 1.48% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in MRSH β a direct measure of their conviction.
Filings activity in MRSH during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new MRSH position in Q2 2026
Institutions that fully closed their MRSH position in Q2 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 1,508 | 2.0% | β | β | $69.25B | 4.3% |
| Q1 2026 | 1,538 | 1.2% | β | β | $72.34B | 5.5% |
| Q4 2025 | 1,556 | +0.7% | β | β | $76.54B | 7.6% |
| Q3 2025 | 1,545 | 2.1% | β | β | $82.82B | 8.6% |
| Q2 2025 | 1,578 | 0.4% | β | β | $90.64B | 8.7% |
| Q1 2025 | 1,584 | +4.6% | β | β | $99.33B | +16% |
| Q4 2024 | 1,515 | +2.3% | β | β | $85.94B | 2.3% |
| Q3 2024 | 1,481 | β | β | β | $87.96B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MRSH stock.
Based on Q2 2026 13F filings, institutional ownership of Marsh & McLennan Companies, Inc. stands at not currently reported, held across 1,508 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of MRSH, with approximately 39,502,046 shares worth $6.58B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of MRSH.
Our composite Smart Money Score for MRSH is 26 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
118 institutions opened new positions in MRSH during Q2 2026, while 168 fully exited. 328 added to existing positions and 1,008 trimmed.
Quarter-over-quarter ownership change for MRSH is not yet available β at least two quarters of 13F data are required.
The top 10 institutions account for 45.7% of all reported 13F value in MRSH, and the top 25 account for 64.6%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Marsh & McLennan Companies, Inc. (MRSH) Institutional Ownership