Latest Period
Q1 2026
Security Snapshot
MARSH & MCLENNAN COMPANIES, INC. - Common Stock (MRSH) Institutional Ownership
CUSIP: 571748102
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
1,526
Shares (Excl. Options)
438,591,772
Price
$173.45
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- Security type / class
- Equity / Common Stock
- Symbol
- MRSH on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 438,591,772
- Total 13F value
- $76,096,188,777
- Portfolio coverage rank
- 0.03%
- Share change
- +442,360
- Value change
- -$110,753,479
- Number of holders
- 1,526
- Shares outstanding
- 484,292,327
- SEC-reported price per share
- $164.11
- Insider filing price
- $164.11
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MRSH - MARSH & MCLENNAN COMPANIES, INC. - Common Stock is tracked under CUSIP 571748102.
- 1526 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 1,578 to 1,526 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $80,796,722,772 to $76,096,188,777.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 1526 institutions filings for Q1 2026.
Security key
571748102
Latest holder period
Q1 2026
13F holders
1,526
13D/G owners
1
CIK / CUSIP context first
Open Q1 2026 holders
MRSH full holder history
MARSH & MCLENNAN COMPANIES, INC. SEC filings
MARSH & MCLENNAN COMPANIES, INC. company facts
MARSH & MCLENNAN COMPANIES, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 571748102:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
1
Security
MRSH
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | 7.5% | $6,221,420,700 | 36,418,783 | Vanguard Capital Management | 31 Mar 2026 |
As of 31 Mar 2026, 1,526 institutional investors reported holding 438,591,772 shares of MARSH & MCLENNAN COMPANIES, INC. - Common Stock (MRSH). This represents 91% of the company’s total 484,292,327 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
58%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.7% | 42,061,676 | +4% | 0.13% | $7,295,597,844 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.5% | 31,467,674 | 0% | 0.14% | $5,458,068,056 |
| STATE STREET CORP | 4.6% | 22,070,945 | +0.91% | 0.13% | $3,828,205,410 |
| Capital World Investors | 3.7% | 17,969,182 | +6.2% | 0.43% | $3,117,023,568 |
| WELLINGTON MANAGEMENT GROUP LLP | 3.6% | 17,370,709 | +8.6% | 0.56% | $3,012,949,476 |
| Capital International Investors | 3.2% | 15,713,853 | -16% | 0.64% | $2,726,030,115 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.8% | 13,404,172 | +15% | 0.14% | $2,322,230,689 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.6% | 12,427,946 | 0% | 0.11% | $2,155,627,234 |
| Capital Research Global Investors | 2.3% | 11,301,188 | +41% | 0.3% | $1,960,349,747 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.3% | 10,976,286 | +19% | 0.22% | $1,903,838,000 |
| FMR LLC | 2.1% | 10,180,705 | -33% | 0.09% | $1,765,843,388 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.7% | 8,200,309 | -5.3% | 0.5% | $1,422,326,336 |
| MORGAN STANLEY | 1.3% | 6,473,991 | -5.8% | 0.07% | $1,122,914,237 |
| Clearbridge Investments, LLC | 1.3% | 6,423,531 | +27% | 0.97% | $1,114,141,193 |
| JPMORGAN CHASE & CO | 1.3% | 6,093,392 | +42% | 0.07% | $1,064,637,518 |
| AMERIPRISE FINANCIAL INC | 1.1% | 5,488,537 | +15% | 0.22% | $951,609,190 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 1.1% | 5,182,517 | +14% | 0.19% | $898,907,573 |
| HARRIS ASSOCIATES L P | 1.1% | 5,169,119 | 1.2% | $896,583,647 | |
| NORTHERN TRUST CORP | 1% | 4,965,079 | -6.3% | 0.11% | $861,192,952 |
| BANK OF AMERICA CORP /DE/ | 1% | 4,939,614 | -11% | 0.06% | $856,775,985 |
| Artisan Partners Limited Partnership | 1% | 4,875,857 | +45% | 1.4% | $845,717,397 |
| UBS Group AG | 0.97% | 4,721,091 | +25% | 0.15% | $818,873,234 |
| AMERICAN CENTURY COMPANIES INC | 0.87% | 4,234,327 | +82% | 0.38% | $734,444,323 |
| Nuveen, LLC | 0.86% | 4,167,487 | +8% | 0.2% | $722,850,575 |
| Ninety One UK Ltd | 0.83% | 4,029,142 | +14% | 1.6% | $698,854,561 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 438,591,772 | $76,096,188,777 | -$110,753,479 | $173.45 | 1,526 |
| 2025 Q4 | 435,359,528 | $80,796,722,772 | +$275,601,031 | $185.52 | 1,578 |
| 2025 Q3 | 431,472,737 | $86,923,121,602 | -$2,932,558,673 | $201.53 | 1,562 |
| 2025 Q2 | 443,913,248 | $97,006,607,827 | +$2,056,655,478 | $218.64 | 1,588 |
| 2025 Q1 | 436,288,736 | $106,420,973,259 | -$1,235,793,076 | $244.03 | 1,603 |
| 2024 Q4 | 441,936,952 | $93,853,217,569 | +$1,307,524,802 | $212.41 | 1,559 |
| 2024 Q3 | 433,771,697 | $96,754,190,914 | -$615,368,956 | $223.09 | 1,514 |
| 2024 Q2 | 436,384,750 | $91,942,585,382 | +$588,780,622 | $210.72 | 1,463 |
| 2024 Q1 | 434,979,809 | $89,543,834,860 | +$315,320,498 | $205.98 | 1,433 |
| 2023 Q4 | 433,473,819 | $82,114,440,826 | +$435,867,404 | $189.47 | 1,364 |
| 2023 Q3 | 430,384,847 | $81,908,148,143 | -$630,419,098 | $190.30 | 1,281 |
| 2023 Q2 | 433,436,077 | $81,400,392,643 | +$109,666,681 | $188.08 | 1,243 |
| 2023 Q1 | 432,719,577 | $72,038,999,238 | -$631,376,312 | $166.55 | 1,209 |
| 2022 Q4 | 437,002,008 | $72,326,569,045 | -$9,729,563 | $165.48 | 1,210 |
| 2022 Q3 | 438,273,180 | $65,461,867,168 | -$1,398,337,272 | $149.29 | 1,143 |
| 2022 Q2 | 442,000,526 | $68,597,268,124 | +$534,576,212 | $155.25 | 1,137 |
| 2022 Q1 | 441,321,997 | $75,161,810,468 | -$945,736,948 | $170.42 | 1,138 |
| 2021 Q4 | 446,141,727 | $77,470,917,420 | -$518,123,273 | $173.82 | 1,160 |
| 2021 Q3 | 448,940,415 | $67,972,529,401 | -$685,623,362 | $151.43 | 1,060 |
| 2021 Q2 | 452,120,809 | $63,575,646,118 | +$391,901,717 | $140.68 | 988 |
| 2021 Q1 | 448,747,076 | $54,641,979,623 | +$636,913,367 | $121.80 | 965 |
| 2020 Q4 | 442,444,348 | $51,732,629,265 | -$200,342,278 | $117.00 | 959 |
| 2020 Q3 | 444,592,166 | $50,965,374,243 | -$156,170,291 | $114.70 | 929 |
| 2020 Q2 | 445,174,719 | $47,782,313,698 | +$66,939,460 | $107.37 | 899 |
| 2020 Q1 | 444,843,277 | $38,463,757,637 | -$234,145,981 | $86.46 | 866 |