Marsh & McLennan Companies, Inc.
DE ˙ DB ˙ US5717481023
138,20 € ↑2,50 (1,84%)
2026-06-04
DEL PRIS
SecurityDE:MSN / Marsh & McLennan Companies, Inc.
InstitutionBanco Santander, S.A.
Latest Disclosed Ownership123,015 shares
Latest Disclosed Value $ 21,336,952
Banco Santander, S.A. reports 11.91% decrease in ownership of MSN / Marsh & McLennan Companies, Inc.

On May 8, 2026 - Banco Santander, S.A. filed a 13F-HR form disclosing ownership of 123,015 shares of Marsh & McLennan Companies, Inc. (DE:MSN) valued at $18,409,195 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 139,648 shares of Marsh & McLennan Companies, Inc.. This represents a change in shares of -11.91% during the quarter. The current value of the position is $17,000,673 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)
2026-05-08 2026-03-31 13F MARSH & MCLENNAN COS COM 571748102 123,015 -16,633 -11.91 21,337 -17.64 0.1008
2026-02-13 2025-12-31 13F MARSH & MCLENNAN COS COM 571748102 139,648 134,401 2,561.48 25,907 2,350.99 0.1940
2025-11-12 2025-09-30 13F MARSH & MCLENNAN COS COM 571748102 5,247 -2,450 -31.83 1,057 -37.16 0.0094
2025-08-01 2025-06-30 13F MARSH & MCLENNAN COS COM 571748102 7,697 1,318 20.66 1,683 8.10 0.0160
2025-05-09 2025-03-31 13F MARSH & MCLENNAN COS COM 571748102 6,379 -80,243 -92.64 1,557 -91.54 0.0172
2025-02-07 2024-12-31 13F MARSH & MCLENNAN COS COM 571748102 86,622 5,253 6.46 18,399 1.36 0.2214
2024-11-12 2024-09-30 13F MARSH & MCLENNAN COS COM 571748102 81,369 0 0.00 18,153 5.87 0.2139
2024-07-29 2024-06-30 13F MARSH & MCLENNAN COS COM 571748102 81,369 15,550 23.63 17,146 26.47 0.2125
2024-05-10 2024-03-31 13F MARSH & MCLENNAN COS COM 571748102 65,819 57,457 687.12 13,557 755.87 0.1634
2024-02-09 2023-12-31 13F MARSH & MCLENNAN COS COM 571748102 8,362 220 2.70 1,584 2.26 0.0187
2023-11-08 2023-09-30 13F MARSH & MCLENNAN COS COM 571748102 8,142 350 4.49 1,549 5.73 0.0220
2023-08-14 2023-06-30 13F MARSH & MCLENNAN COS COM 571748102 7,792 -390 -4.77 1,466 7.56 0.0192
2023-05-10 2023-03-31 13F MARSH & MCLENNAN COS COM 571748102 8,182 110 1.36 1,363 2.02 0.0204
2023-02-13 2022-12-31 13F MARSH & MCLENNAN COS COM 571748102 8,072 420 5.49 1,336 16.80 0.0201
2022-11-08 2022-09-30 13F MARSH & MCLENNAN COS COM 571748102 7,652 -268 -3.38 1,143 -7.07 0.0152
2022-07-28 2022-06-30 13F MARSH & MCLENNAN COS COM 571748102 7,920 -5,508 -41.02 1,230 -46.24 0.0164
2022-05-09 2022-03-31 13F MARSH & MCLENNAN COS COM 571748102 13,428 1,349 11.17 2,288 8.95 0.0246
2022-02-09 2021-12-31 13F MARSH & MCLENNAN COS COM 571748102 12,079 -3,528 -22.61 2,100 -11.13 0.0113
2021-11-08 2021-09-30 13F MARSH & MCLENNAN COS COM 571748102 15,607 14,149 970.44 2,363 1,052.68 0.0127
2021-07-29 2021-06-30 13F MARSH & MCLENNAN COS COM 571748102 1,458 1,458 205 0.0011
2018-11-13 2018-09-30 13F MARSH & MCLENNAN COS COM 571748102 0 -2,615 -100.00 0 -100.00
2018-08-14 2018-06-30 13F MARSH & MCLENNAN COS COM 571748102 2,615 -181 -6.47 214 -7.36 0.0025
2018-05-14 2018-03-31 13F MARSH & MCLENNAN COS COM 571748102 2,796 2,796 231 0.0027
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.