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

SecurityMRSH / Marsh & McLennan Companies, Inc.
InstitutionDillon & Associates Inc
Latest Disclosed Ownership1,800 shares
Latest Disclosed Value $ 311
Dillon & Associates Inc ownership in MRSH / Marsh & McLennan Companies, Inc.

On May 7, 2026 - Dillon & Associates Inc filed a 13F-HR form disclosing ownership of 1,800 shares of Marsh & McLennan Companies, Inc. (US:MRSH) valued at $312,210 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,800 shares of Marsh & McLennan Companies, Inc.. The current value of the position is $283,176 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-07 2026-03-31 13F Marsh & McLennan MRSH 571748102 1,800 0 0.00 0 0.0428
2026-02-09 2025-12-31 13F Marsh & McLennan COMM 571748102 1,800 -17 -0.94 0 0.0433
2025-10-28 2025-09-30 13F Marsh & McLennan COMM 571748102 1,817 0 0.00 0 0.0472
2025-08-05 2025-06-30 13F Marsh & McLennan COMM 571748102 1,817 17 0.94 0 0.0540
2025-05-12 2025-03-31 13F Marsh & McLennan COMM 571748102 1,800 0 0.00 0 0.0652
2025-02-11 2024-12-31 13F Marsh & McLennan COMM 571748102 1,800 0 0.00 0 0.0530
2024-11-05 2024-09-30 13F Marsh & McLennan COMM 571748102 1,800 0 0.00 0 0.0564
2024-08-06 2024-06-30 13F Marsh & McLennan COMM 571748102 1,800 0 0.00 0 0.0552
2024-04-30 2024-03-31 13F Marsh & McLennan COMM 571748102 1,800 300 20.00 0 0.0583
2024-02-08 2023-12-31 13F Marsh & McLennan COMM 571748102 1,500 0 0.00 0 0.0515
2023-11-13 2023-09-30 13F Marsh & McLennan COMM 571748102 1,500 -17 -1.12 0 0.0548
2023-08-08 2023-06-30 13F Marsh & McLennan COMM 571748102 1,517 0 0.00 0 0.0524
2023-05-02 2023-03-31 13F/A-1 Marsh & McLennan COMM 571748102 1,517 0 0.00 0 0.0502
2023-05-01 2023-03-31 13F Marsh & McLennan COMM 571748102 1,548 31 0 0.0469
2023-02-06 2022-12-31 13F Marsh & McLennan COMM 571748102 1,517 -11 -0.72 0 -100.00 0.0541
2022-11-08 2022-09-30 13F Marsh & McLennan COMM 571748102 1,528 0 0.00 228 -3.80 0.0529
2022-07-26 2022-06-30 13F Marsh & McLennan COMM 571748102 1,528 0 0.00 237 -8.85 0.0534
2022-05-06 2022-03-31 13F Marsh & McLennan COMM 571748102 1,528 -20 -1.29 260 -3.35 0.0493
2022-02-14 2021-12-31 13F Marsh & McLennan COMM 571748102 1,548 0 0.00 269 14.96 0.0469
2021-10-28 2021-09-30 13F Marsh & McLennan COMM 571748102 1,548 20 1.31 234 8.84 0.0448
2021-08-02 2021-06-30 13F Marsh & McLennan COMM 571748102 1,528 1,528 215 0.0421
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.