Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionMn Services Vermogensbeheer B.V.
Latest Disclosed Ownership97,921 shares
Latest Disclosed Value $ 21,208
Mn Services Vermogensbeheer B.V. reports 0.71% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On April 30, 2026 - Mn Services Vermogensbeheer B.V. filed a 13F-HR form disclosing ownership of 97,921 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $21,208 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 98,621 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -0.71% during the quarter.

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)
2026-04-30 2026-03-31 13F ARTHUR J GALLAGH COM 363576109 97,921 -700 -0.71 21 -16.00 0.1400
2026-01-15 2025-12-31 13F ARTHUR J GALLAGH COM 363576109 98,621 1,911 1.98 26 -13.79 0.1570
2025-10-31 2025-09-30 13F ARTHUR J GALLAGH COM 363576109 96,710 1,100 1.15 30 -3.33 0.1936
2025-07-10 2025-06-30 13F ARTHUR J GALLAGH COM 363576109 95,610 15,700 19.65 31 11.11 0.2130
2025-04-17 2025-03-31 13F ARTHUR J GALLAGH COM 363576109 79,910 -5,000 -5.89 28 12.50 0.2136
2025-02-05 2024-12-31 13F ARTHUR J GALLAGH COM 363576109 84,910 1,700 2.04 24 4.35 0.1624
2024-10-30 2024-09-30 13F ARTHUR J GALLAGH COM 363576109 83,210 -3,000 -3.48 23 4.55 0.1642
2024-07-25 2024-06-30 13F ARTHUR J GALLAGH COM 363576109 86,210 -1,100 -1.26 22 4.76 0.1615
2024-04-29 2024-03-31 13F ARTHUR J GALLAGH COM 363576109 87,310 -15,300 -14.91 22 -8.70 0.1585
2024-01-29 2023-12-31 13F ARTHUR J GALLAGH COM 363576109 102,610 -1,600 -1.54 23 0.00 0.2078
2023-10-25 2023-09-30 13F ARTHUR J GALLAGH COM 363576109 104,210 3,100 3.07 24 4.55 0.2290
2023-08-09 2023-06-30 13F ARTHUR J GALLAGH COM 363576109 101,110 -1,700 -1.65 22 15.79 0.2071
2023-04-26 2023-03-31 13F ARTHUR J GALLAGH COM 363576109 102,810 3,200 3.21 20 5.56 0.2027
2023-02-03 2022-12-31 13F ARTHUR J GALLAGH COM 363576109 99,610 -15,400 -13.39 19 -99.91 0.2105
2022-11-01 2022-09-30 13F ARTHUR J GALLAGH COM 363576109 115,010 -7,600 -6.20 19,692 -1.49 0.2074
2022-08-03 2022-06-30 13F ARTHUR J GALLAGH COM 363576109 122,610 -15,400 -11.16 19,990 -17.04 0.1863
2022-05-10 2022-03-31 13F ARTHUR J GALLAGH COM 363576109 138,010 -11,400 -7.63 24,097 -4.94 0.1603
2022-02-10 2021-12-31 13F ARTHUR J GALLAGH COM 363576109 149,410 5,200 3.61 25,350 18.25 0.1485
2021-11-03 2021-09-30 13F ARTHUR J GALLAGH COM 363576109 144,210 2,200 1.55 21,437 27.80 0.1323
2021-08-05 2021-06-30 13F ARTHUR J GALLAGH COM 363576109 142,010 -22,800 -13.83 16,774 -17.73 0.1303
2021-02-09 2020-12-31 13F ARTHUR J GALLAGH COM 363576109 164,810 2,400 1.48 20,388 18.90 0.1439
2020-11-04 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 162,410 2,000 1.25 17,147 9.65 0.1349
2020-07-23 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 160,410 1,500 0.94 15,638 20.73 0.1337
2020-05-12 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 158,910 -7,400 -4.45 12,953 -18.22 0.1449
2020-02-12 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 166,310 5,700 3.55 15,838 10.09 0.1350
2019-11-12 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 160,610 66,316 70.33 14,386 74.19 0.1335
2019-07-25 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 94,294 -6,300 -6.26 8,259 5.13 0.0970
2019-05-06 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 100,594 1,600 1.62 7,856 23.10 0.0909
2019-02-12 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 98,994 70,010 241.55 6,382 195.74 0.0969
2018-11-02 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 28,984 0 0.00 2,158 14.06 0.0506
2018-08-13 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 28,984 -1,000 -3.34 1,892 -8.20 0.0474
2018-05-11 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,984 2,100 7.53 2,061 40.30 0.0537
2018-02-02 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 27,884 -1,100 -3.80 1,469 -17.66 0.0462
2017-11-01 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 28,984 0 0.00 1,784 7.53 0.0469
2017-07-14 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 28,984 24,234 510.19 1,659 560.96 0.0456
2017-04-24 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,750 278 6.22 251 14.09 0.0485
2017-01-11 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,472 0 0.00 220 -3.08 0.0449
2016-11-08 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,472 0 0.00 227 18.23 0.0452
2016-08-05 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,472 147 3.40 192 13.61 0.0444
2016-04-28 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,325 4,325 169 0.0393
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.