Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionCresset Asset Management, LLC
Latest Disclosed Ownership6,370 shares
Latest Disclosed Value $ 1,379,647
Cresset Asset Management, LLC reports 112.12% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 15, 2026 - Cresset Asset Management, LLC filed a 13F-HR form disclosing ownership of 6,370 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $1,379,647 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,003 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 112.12% 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)
2026-05-15 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 6,370 3,367 112.12 1,380 77.48 0.0060
2026-02-17 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,003 121 4.20 777 -12.89 0.0033
2026-01-22 2025-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 2,882 185 6.86 892 3.36 0.0039
2025-11-12 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 20,295 17,598 6,286 0.0236
2026-01-22 2025-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 2,697 -974 -26.53 863 -31.89 0.0043
2025-08-13 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 16,785 13,114 5,374 0.0233
2025-05-13 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,671 -126 -3.32 1,268 17.64 0.0063
2025-02-14 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,797 -8,897 -70.09 1,078 -69.84 0.0051
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 12,694 296 2.39 3,572 11.11 0.0137
2024-08-14 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 12,398 2,104 20.44 3,215 24.91 0.0135
2024-05-15 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 10,294 1,249 13.81 2,574 26.56 0.0124
2024-02-14 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 9,045 51 0.57 2,034 -0.78 0.0122
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 8,994 244 2.79 2,050 6.66 0.0079
2023-08-14 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 8,750 7,233 476.80 1,921 562.41 0.0024
2023-05-12 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 1,517 -737 -32.70 290 -15.94 0.0058
2023-02-14 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,254 831 58.40 346 41.39 0.0044
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 1,423 48 3.49 244 8.44 0.0031
2022-08-15 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 1,375 -702 -33.80 225 -38.02 0.0028
2022-05-16 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,077 66 3.28 363 6.45 0.0038
2022-02-10 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,011 -388 -16.17 341 -4.48 0.0033
2021-11-15 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,399 -54 -2.20 357 3.78 0.0048
2021-08-10 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,453 84 3.55 344 16.61 0.0049
2021-05-12 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,369 17 0.72 295 1.37 0.0047
2021-02-11 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,352 -1,462 -38.33 291 -27.61 0.0047
2020-11-13 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,814 205 5.68 402 14.20 0.0075
2020-08-04 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,609 -795 -18.05 352 -1.95 0.0077
2020-05-15 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,404 -66 -1.48 359 -15.73 0.0109
2020-02-10 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,470 40 0.90 426 7.30 0.0115
2019-11-13 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,430 671 17.85 397 20.67 0.0121
2019-08-20 2019-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 3,759 517 15.95 329 30.04 0.0102
2019-08-12 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,759 517 329
2019-05-15 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,242 130 4.18 253 10.48 0.0098
2019-05-21 2018-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 3,112 3,112 229 0.0136
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.