Marsh & McLennan Companies, Inc.
US ˙ NYSE ˙ US5717481023
DIESES SYMBOL IST NICHT MEHR AKTIV

SecurityMMC / Marsh & McLennan Companies, Inc.
InstitutionFirst Manhattan Co
Latest Disclosed Ownership29,127 shares
Latest Disclosed Value $ 5,052,138
First Manhattan Co reports 3.81% decrease in ownership of MMC / Marsh & McLennan Companies, Inc.

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 29,127 shares of Marsh & McLennan Companies, Inc. (US:MMC) valued at $5,052,138 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 30,282 shares of Marsh & McLennan Companies, Inc.. This represents a change in shares of -3.81% during the quarter. The current value of the position is $5,321,503 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)
2026-05-15 2026-03-31 13F MARSH & MCLENNAN COS COM 571748102 29,127 -1,155 -3.81 5,052 -10.06 0.0140
2026-02-17 2025-12-31 13F MARSH & MCLENNAN COS COM 571748102 30,282 1,203 4.14 5,618 -4.15 0.0148
2025-11-14 2025-09-30 13F MARSH & MCLENNAN COS COM 571748102 29,079 911 3.23 5,860 -4.84 0.0155
2025-08-14 2025-06-30 13F MARSH & MCLENNAN COS COM 571748102 28,168 3,916 16.15 6,159 4.06 0.0174
2025-05-15 2025-03-31 13F MARSH & MCLENNAN COS COM 571748102 24,252 10,231 72.97 5,918 98.72 0.0173
2025-02-14 2024-12-31 13F MARSH & MCLENNAN COS COM 571748102 14,021 2,118 17.79 2,978 12.17 0.0087
2024-11-14 2024-09-30 13F MARSH & MCLENNAN COS COM 571748102 11,903 848 7.67 2,656 14.00 0.0079
2024-08-15 2024-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 11,055 2,946 36.33 2,330 38.96 0.0075
2024-08-14 2024-06-30 13F MARSH & MCLENNAN COS COM 571748102 11,055 2,946 2,330 0.0075
2024-05-15 2024-03-31 13F MARSH & MCLENNAN COS COM 571748102 8,109 774 10.55 1,677 20.14 0.0054
2024-02-13 2023-12-31 13F MARSH & MCLENNAN COS COM 571748102 7,335 3,547 93.64 1,396 93.75 0.0048
2023-11-14 2023-09-30 13F MARSH & MCLENNAN COS COM 571748102 3,788 12 0.32 721 1.41 0.0027
2023-08-14 2023-06-30 13F MARSH & MCLENNAN COS COM 571748102 3,776 -809 -17.64 710 -6.95 0.0026
2023-05-15 2023-03-31 13F MARSH & MCLENNAN COS COM 571748102 4,585 229 5.26 764 5.97 0.0029
2023-02-14 2022-12-31 13F MARSH & MCLENNAN COS COM 571748102 4,356 103 2.42 721 13.39 0.0026
2022-11-14 2022-09-30 13F MARSH & MCLENNAN COS COM 571748102 4,253 75 1.80 635 -2.01 0.0027
2022-08-15 2022-06-30 13F MARSH & MCLENNAN COS COM 571748102 4,178 2 0.05 648 -8.86 0.0026
2022-05-16 2022-03-31 13F MARSH & MCLENNAN COS COM 571748102 4,176 3 0.07 711 -1.93 0.0023
2022-02-14 2021-12-31 13F MARSH & MCLENNAN COS COM 571748102 4,173 3,639 681.46 725 806.25 0.0024
2021-11-15 2021-09-30 13F MARSH & MCLENNAN COS COM 571748102 534 0 0.00 80 6.67 0.0003
2021-08-16 2021-06-30 13F MARSH & MCLENNAN COS COM 571748102 534 0 0.00 75 15.38 0.0003
2021-05-14 2021-03-31 13F MARSH & MCLENNAN COS COM 571748102 534 0 0.00 65 4.84 0.0003
2021-02-16 2020-12-31 13F MARSH & MCLENNAN COS COM 571748102 534 0 0.00 62 1.64 0.0003
2020-11-12 2020-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 534 -156 -22.61 61 -17.57 0.0003
2020-08-14 2020-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 690 156 29.21 74 60.87 0.0004
2020-05-06 2020-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 534 134 33.50 46 4.55 0.0003
2020-02-13 2019-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 400 0 0.00 44 10.00 0.0002
2019-11-13 2019-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 400 -4,666 -92.10 40 -92.08 0.0002
2019-08-16 2019-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 5,066 -1,225 -19.47 505 -14.41 0.0028
2019-04-12 2019-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 6,291 721 12.94 590 32.88 0.0034
2019-01-30 2018-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 5,570 0 0.00 444 -3.48 0.0028
2018-10-15 2018-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 5,570 1,200 27.46 460 28.49 0.0025
2018-08-01 2018-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 4,370 0 0.00 358 -0.56 0.0021
2018-04-20 2018-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 4,370 20 0.46 360 1.69 0.0020
2018-01-22 2017-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 4,350 300 7.41 354 4.42 0.0019
2017-10-25 2017-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 4,050 400 10.96 339 19.37 0.0019
2017-08-10 2017-06-30 13F/A-2 MARSH & MCLENNAN COS COMMON 571748102 3,650 -450 -10.98 284 -5.96 0.0017
2017-08-01 2017-06-30 13F/A-1 MARSH & MCLENNAN COS COMMON 571748102 3,950 300 307 0.0018
2017-07-28 2017-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 3,950 -150 307
2017-04-25 2017-03-31 13F/A-1 MARSH & MCLENNAN COS COMMON 571748102 4,100 0 0.00 302 9.03 0.0018
2017-04-24 2017-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 4,100 275
2017-01-25 2016-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 4,100 0 0.00 277 0.73 0.0017
2016-10-20 2016-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 4,100 0 0.00 275 -1.79 0.0017
2016-07-14 2016-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 4,100 3,500 583.33 280 677.78 0.0017
2016-04-22 2016-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 600 -800 -57.14 36 -53.25 0.0002
2016-01-20 2015-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 1,400 -9,000 -86.54 77 -85.82 0.0005
2015-10-26 2015-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 10,400 0 0.00 543 -7.81 0.0035
2015-07-17 2015-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 10,400 0 0.00 589 1.03 0.0035
2015-04-30 2015-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 10,400 0 0.00 583 -2.02 0.0034
2015-01-20 2014-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 10,400 0 0.00 595 9.38 0.0034
2014-10-23 2014-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 10,400 -250 -2.35 544 -1.27 0.0032
2014-08-14 2014-06-30 13F/A-1 MARSH & MCLENNAN COS COMMON 571748102 10,650 -935 -8.07 551 -3.50 0.0035
2014-05-16 2014-03-31 13F MARSH & MCLENNAN COS COMMON 571748102 11,585 0 0.00 571 1.96 0.0038
2014-02-04 2013-12-31 13F MARSH & MCLENNAN COS COMMON 571748102 11,585 -1,165 -9.14 560 0.90 0.0037
2013-10-29 2013-09-30 13F MARSH & MCLENNAN COS COMMON 571748102 12,750 0 0.00 555 4.52 0.0039
2013-08-13 2013-06-30 13F MARSH & MCLENNAN COS COMMON 571748102 12,750 12,750 531 0.0037
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.