Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionFirst American Bank
Latest Disclosed Ownership18,446 shares
Latest Disclosed Value $ 3,995,042
First American Bank reports 1.46% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On April 20, 2026 - First American Bank filed a 13F-HR form disclosing ownership of 18,446 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $3,995,042 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 18,719 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -1.46% 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)
2026-04-20 2026-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 18,446 -273 -1.46 3,995 -17.53 0.2507
2026-01-20 2025-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 18,719 -92 -0.49 4,844 -16.86 0.2935
2025-10-20 2025-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 18,811 -1,193 -5.96 5,827 -9.01 0.3661
2025-07-16 2025-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 20,004 816 4.25 6,404 -3.34 0.4390
2025-04-22 2025-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 19,188 120 0.63 6,624 22.39 0.4900
2025-02-05 2024-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 19,068 59 0.31 5,412 1.20 0.3813
2024-10-24 2024-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 19,009 -1,913 -9.14 5,349 -1.42 0.3843
2024-07-30 2024-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 20,922 187 0.90 5,425 4.65 0.4061
2024-07-31 2024-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 20,735 42 0.20 5,185 11.41 0.3915
2024-07-31 2023-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 20,693 -712 -3.33 4,653 -4.61 0.3888
2024-07-31 2023-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 21,405 -25 -0.12 4,879 3.68 0.4412
2024-07-31 2023-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 21,430 345 1.64 4,705 16.66 0.4077
2024-07-31 2023-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 21,085 146 0.70 4,034 2.18 0.3699
2024-07-31 2022-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 20,939 958 4.79 3,948 15.38 0.3786
2024-07-31 2022-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 19,981 655 3.39 3,421 8.60 0.3574
2024-07-31 2022-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 19,326 -1,375 -6.64 3,151 -12.84 0.3208
2024-07-31 2022-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 20,701 1,544 8.06 3,614 11.20 0.3059
2022-02-07 2021-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 19,157 358 1.90 3,250 16.32 0.1718
2021-10-28 2021-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 18,799 3,765 25.04 2,794 32.67 0.1615
2021-07-13 2021-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 15,034 -34 -0.23 2,106 12.02 0.1225
2021-04-08 2021-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 15,068 -300 -1.95 1,880 -1.10 0.1179
2021-01-06 2020-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 15,368 -193 -1.24 1,901 15.70 0.1272
2020-10-09 2020-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 15,561 1,598 11.44 1,643 20.72 0.0973
2020-07-13 2020-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 13,963 4,881 53.74 1,361 83.92 0.0857
2020-04-07 2020-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 9,082 9,082 740 0.0551
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.