Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionAdvisorNet Financial, Inc
Latest Disclosed Ownership1,357 shares
Latest Disclosed Value $ 293,918
AdvisorNet Financial, Inc reports 0.22% increase in ownership of AJG / Arthur J. Gallagher & Co.

On April 17, 2026 - AdvisorNet Financial, Inc filed a 13F-HR form disclosing ownership of 1,357 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $293,918 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 1,354 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 0.22% 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)
2026-04-17 2026-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,357 3 0.22 294 -16.29 0.0152
2026-01-20 2025-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,354 0 0.00 350 -16.47 0.0187
2025-10-09 2025-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,354 24 1.80 419 -1.41 0.0237
2025-07-14 2025-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,330 -1 -0.08 426 -7.41 0.0274
2025-04-07 2025-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,331 -28 -2.06 460 19.22 0.0341
2025-01-13 2024-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,359 1,006 284.99 386 288.89 0.0323
2024-10-15 2024-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 353 -14 -3.81 99 4.21 0.0074
2024-07-16 2024-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 367 -41 -10.05 95 -6.86 0.0086
2024-04-12 2024-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 408 -12 -2.86 102 8.51 0.0098
2024-01-19 2023-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 420 35 9.09 94 8.05 0.0087
2023-10-12 2023-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 385 -1,226 -76.10 88 -75.35 0.0080
2023-07-14 2023-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,611 25 1.58 354 16.50 0.0303
2023-04-28 2023-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,586 -72 -4.34 303 -2.88 0.0278
2023-01-13 2022-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,658 -24 -1.43 313 8.33 0.0308
2022-10-04 2022-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,682 -251 -12.98 288 -8.57 0.0288
2022-07-07 2022-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,933 -467 -19.46 315 -24.82 0.0309
2022-04-14 2022-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 2,400 356 17.42 419 20.75 0.0264
2022-01-19 2021-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 2,044 208 11.33 347 27.11 0.0214
2021-10-15 2021-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,836 623 51.36 273 60.59 0.0190
2021-07-06 2021-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,213 70 6.12 170 18.88 0.0113
2021-04-14 2021-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,143 -62 -5.15 143 -4.03 0.0102
2021-02-04 2020-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,205 31 2.64 149 20.16 0.0120
2020-11-06 2020-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,174 -11 -0.93 124 6.90 0.0106
2020-08-26 2020-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,185 -53 -4.28 116 14.85 0.0093
2020-05-14 2020-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,238 -29 -2.29 101 -16.53 0.0093
2020-02-12 2019-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,267 174 15.92 121 23.47 0.0103
2019-10-23 2019-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 1,093 -1,018 -48.22 98 -47.03 0.0090
2019-07-15 2019-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 2,111 1,196 130.71 185 160.56 0.0205
2019-05-14 2019-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 915 11 1.22 71 5.97 0.0087
2019-02-08 2018-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 904 125 16.05 67 15.52 0.0093
2018-11-14 2018-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 779 0 0.00 58 13.73 0.0073
2018-07-26 2018-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 779 33 4.42 51 0.00 0.0069
2018-05-08 2018-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 746 -36 -4.60 51 4.08 0.0070
2018-02-27 2017-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 782 782 49 0.0074
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.