Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionCommerce Bank
Latest Disclosed Ownership58,062 shares
Latest Disclosed Value $ 12,575,067
Commerce Bank reports 192.84% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 11, 2026 - Commerce Bank filed a 13F-HR form disclosing ownership of 58,062 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $12,575,067 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 19,827 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 192.84% 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)
2026-05-11 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 58,062 38,235 192.84 12,575 145.08 0.0259
2026-02-13 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 19,827 -3,091 -13.49 5,131 -27.71 0.0283
2025-11-12 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 22,918 -642 -2.72 7,099 -5.89 0.0395
2025-08-07 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 23,560 -219 -0.92 7,542 -8.13 0.0445
2025-05-08 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 23,779 -227 -0.95 8,209 20.47 0.0524
2025-02-13 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 24,006 794 3.42 6,814 4.33 0.0420
2024-11-08 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 23,212 29 0.13 6,531 8.65 0.0400
2024-08-12 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 23,183 -102 -0.44 6,012 3.25 0.0389
2024-05-03 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 23,285 -1,914 -7.60 5,822 2.75 0.0385
2024-02-09 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 25,199 2,009 8.66 5,667 7.21 0.0403
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 23,190 -243 -1.04 5,286 2.72 0.0416
2023-08-08 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 23,433 -208 -0.88 5,145 13.78 0.0385
2023-05-04 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 23,641 1,818 8.33 4,523 9.92 0.0354
2023-02-10 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 21,823 24 0.11 4,115 10.21 0.0334
2022-11-04 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 21,799 591 2.79 3,733 7.95 0.0324
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 21,208 -996 -4.49 3,458 -10.81 0.0282
2022-05-09 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 22,204 124 0.56 3,877 3.50 0.0266
2022-02-14 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 22,080 827 3.89 3,746 18.54 0.0245
2021-11-09 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 21,253 3,029 16.62 3,160 23.78 0.0223
2021-08-09 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 18,224 -3,120 -14.62 2,553 -4.13 0.0181
2021-05-05 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 21,344 -1,897 -8.16 2,663 -7.37 0.0203
2021-02-09 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 23,241 -31,370 -57.44 2,875 -50.14 0.0232
2020-11-06 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 54,611 -1,898 -3.36 5,766 4.67 0.0521
2020-08-07 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 56,509 -4,805 -7.84 5,509 10.22 0.0537
2020-05-08 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 61,314 -2,960 -4.61 4,998 -18.35 0.0605
2020-02-14 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 64,274 -1,087 -1.66 6,121 4.56 0.0583
2019-11-12 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 65,361 -16,887 -20.53 5,854 -18.74 0.0601
2019-08-07 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 82,248 767 0.94 7,204 13.20 0.0808
2019-05-08 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 81,481 -45,350 -35.76 6,364 -31.91 0.0754
2019-02-11 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 126,831 -2,297 -1.78 9,347 -2.76 0.1190
2018-11-02 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 129,128 -7,490 -5.48 9,612 7.78 0.1144
2018-08-08 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 136,618 1,688 1.25 8,918 -3.84 0.1133
2018-05-03 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 134,930 1,940 1.46 9,274 10.19 0.1224
2018-02-12 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 132,990 -1,084 -0.81 8,416 1.98 0.1095
2017-11-07 2017-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 134,074 10,045 8.10 8,253 16.24 0.1122
2017-11-07 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 124,029 7,100
2017-08-08 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 124,029 -5,395 -4.17 7,100 -2.98 0.0996
2017-05-05 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 129,424 2,075 1.63 7,318 10.59 0.1043
2017-02-08 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 127,349 3,552 2.87 6,617 5.07 0.0988
2016-11-03 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 123,797 -356 -0.29 6,298 6.58 0.0980
2016-08-09 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 124,153 -9,965 -7.43 5,909 -0.96 0.0935
2016-04-27 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 134,118 -12,855 -8.75 5,966 -0.85 0.0990
2016-02-12 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 146,973 3,840 2.68 6,017 1.83 0.1007
2015-11-10 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 143,133 143,133 5,909 0.1016
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.