Marsh & McLennan Companies, Inc.
US ˙ NYSE ˙ US5717481023

SecurityMRSH / Marsh & McLennan Companies, Inc.
InstitutionTcw Group Inc
Latest Disclosed Ownership13,271 shares
Latest Disclosed Value $ 2,301,855
Tcw Group Inc reports 11.68% increase in ownership of MRSH / Marsh & McLennan Companies, Inc.

On May 14, 2026 - Tcw Group Inc filed a 13F-HR form disclosing ownership of 13,271 shares of Marsh & McLennan Companies, Inc. (US:MRSH) valued at $2,301,855 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 11,883 shares of Marsh & McLennan Companies, Inc.. This represents a change in shares of 11.68% during the quarter. The current value of the position is $2,087,794 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F MARSH & MCLENNAN COS COM 571748102 13,271 1,388 11.68 2,302 4.40 0.0173
2026-02-17 2025-12-31 13F MARSH & MCLENNAN COS COM 571748102 11,883 11,883 2,205 0.0158
2025-11-14 2025-09-30 13F MARSH & MCLENNAN COS COM 571748102 0 -11,594 -100.00 0 -100.00
2025-08-14 2025-06-30 13F MARSH & MCLENNAN COS COM 571748102 11,594 156 1.36 2,535 -9.21 0.0199
2025-05-07 2025-03-31 13F MARSH & MCLENNAN COS COM 571748102 11,438 72 0.63 2,791 15.62 0.0250
2025-02-04 2024-12-31 13F MARSH & MCLENNAN COS COM 571748102 11,366 172 1.54 2,414 -3.32 0.0203
2024-11-19 2024-09-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 11,194 -158 -1.39 2,497 4.39 0.0218
2024-11-08 2024-09-30 13F MARSH & MCLENNAN COS COM 571748102 11,194 -158 2,497 0.0112
2024-07-19 2024-06-30 13F MARSH & MCLENNAN COS COM 571748102 11,352 264 2.38 2,392 4.77 0.0214
2024-05-10 2024-03-31 13F MARSH & MCLENNAN COS COM 571748102 11,088 -1,147 -9.37 2,284 -1.25 0.0231
2024-02-09 2023-12-31 13F MARSH & MCLENNAN COS COM 571748102 12,235 12,235 2,313 0.0258
2017-05-11 2017-03-31 13F MARSH & MCLENNAN COS COM 571748102 0 -46,677 -100.00 0 -100.00
2017-02-10 2016-12-31 13F MARSH & MCLENNAN COS COM 571748102 46,677 8,377 21.87 3,155 22.48 0.0237
2016-11-14 2016-09-30 13F MARSH & MCLENNAN COS COM 571748102 38,300 100 0.26 2,576 -1.49 0.0196
2016-08-12 2016-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 38,200 -11,282 -22.80 2,615 -13.07 0.0198
2016-08-11 2016-06-30 13F MARSH & MCLENNAN COS COM 571748102 38,200 2,615
2016-05-16 2016-03-31 13F MARSH & MCLENNAN COS COM 571748102 49,482 13,382 37.07 3,008 50.25 0.0221
2016-02-16 2015-12-31 13F MARSH & MCLENNAN COS COM 571748102 36,100 -200 -0.55 2,002 5.59 0.0144
2015-11-13 2015-09-30 13F MARSH & MCLENNAN COS COM 571748102 36,300 -300 -0.82 1,896 -8.63 0.0136
2015-08-12 2015-06-30 13F MARSH & MCLENNAN COS COM 571748102 36,600 -115,200 -75.89 2,075 -75.63 0.0134
2015-05-13 2015-03-31 13F MARSH & MCLENNAN COS COM 571748102 151,800 -1,700 -1.11 8,514 -3.10 0.0409
2015-02-13 2014-12-31 13F MARSH & MCLENNAN COS COM 571748102 153,500 -113,100 -42.42 8,786 -37.04 0.0368
2014-11-14 2014-09-30 13F MARSH & MCLENNAN COS COM 571748102 266,600 -8,700 -3.16 13,954 -2.19 0.0561
2014-08-14 2014-06-30 13F MARSH & MCLENNAN COS COM 571748102 275,300 2,900 1.06 14,266 6.23 0.0588
2014-05-13 2014-03-31 13F MARSH & MCLENNAN COS COM 571748102 272,400 1,050 0.39 13,429 2.32 0.0558
2014-02-18 2013-12-31 13F/A-1 MARSH & MCLENNAN COS COM 571748102 271,350 0 0.00 13,124 11.06 0.0553
2014-02-14 2013-12-31 13F MARSH & MCLENNAN COS COM 571748102 13,124 271,350
2013-11-14 2013-09-30 13F MARSH & MCLENNAN COS COM 571748102 271,350 1,400 0.52 11,817 9.66 0.0546
2013-08-14 2013-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 269,950 269,950 10,776 0.0531
2013-08-14 2013-06-30 13F MARSH & MCLENNAN COS COM 571748102 269,950 10,776
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.