Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership4,222 shares
Latest Disclosed Value $ 914,483
Advisory Services Network, LLC reports 2.48% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 4,222 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $914,483 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,120 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 2.48% 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 & CO COM Stock 363576109 4,222 102 2.48 914 -14.26 0.0084
2026-02-17 2025-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 4,120 -460 -10.04 1,066 -24.82 0.0151
2025-11-18 2025-09-30 13F GALLAGHER ARTHUR J Stock 363576109 4,580 -3,819 -45.47 1,419 -41.21 0.0208
2025-08-19 2025-06-30 13F GALLAGHER ARTHUR J Stock 363576109 8,399 279 3.44 2,413 -13.95 0.0388
2025-05-15 2025-03-31 13F GALLAGHER ARTHUR J Stock 363576109 8,120 -233 -2.79 2,803 18.22 0.0539
2025-02-13 2024-12-31 13F GALLAGHER ARTHUR J Stock 363576109 8,353 149 1.82 2,371 11.47 0.0442
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J Stock 363576109 8,204 0 0.00 2,127 0.00 0.0440
2024-08-13 2024-06-30 13F GALLAGHER ARTHUR J Stock 363576109 8,204 269 3.39 2,127 7.21 0.0440
2024-05-06 2024-03-31 13F GALLAGHER ARTHUR J Stock 363576109 7,935 -3,147 -28.40 1,984 -20.39 0.0440
2024-02-09 2023-12-31 13F GALLAGHER ARTHUR J Stock 363576109 11,082 3,213 40.83 2,492 38.98 0.0609
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J Stock 363576109 7,869 675 9.38 1,794 13.55 0.0482
2023-08-09 2023-06-30 13F GALLAGHER ARTHUR J Stock 363576109 7,194 151 2.14 1,580 17.22 0.0421
2023-05-17 2023-03-31 13F GALLAGHER ARTHUR J Stock 363576109 7,043 448 6.79 1,348 8.37 0.0373
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J Stock 363576109 6,595 -44 -0.66 1,243 9.42 0.0381
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J Stock 363576109 6,639 359 5.72 1,136 10.94 0.0401
2022-08-02 2022-06-30 13F GALLAGHER ARTHUR J Stock 363576109 6,280 454 7.79 1,024 0.59 0.0350
2022-05-23 2022-03-31 13F GALLAGHER ARTHUR J Stock 363576109 5,826 370 6.78 1,018 9.94 0.0300
2022-02-14 2021-12-31 13F GALLAGHER ARTHUR J Stock 363576109 5,456 806 17.33 926 34.01 0.0266
2021-11-05 2021-09-30 13F GALLAGHER ARTHUR J Stock 363576109 4,650 921 24.70 691 32.12 0.0220
2021-08-12 2021-06-30 13F GALLAGHER ARTHUR J Stock 363576109 3,729 68 1.86 523 14.44 0.0165
2021-05-24 2021-03-31 13F GALLAGHER ARTHUR J Stock 363576109 3,661 58 1.61 457 2.70 0.0170
2021-02-09 2020-12-31 13F GALLAGHER ARTHUR J Stock 363576109 3,603 -271 -7.00 445 8.80 0.0179
2020-11-16 2020-09-30 13F GALLAGHER ARTHUR J Stock 363576109 3,874 16 0.41 409 8.78 0.0192
2020-08-10 2020-06-30 13F ARTHUR J GALLAGHER Stock 363576109 3,858 33 0.86 376 20.51 0.0206
2020-05-15 2020-03-31 13F GALLAGHER ARTHUR J Stock 363576109 3,825 -178 -4.45 312 -18.32 0.0204
2020-02-04 2019-12-31 13F GALLAGHER ARTHUR J Stock 363576109 4,003 103 2.64 382 11.70 0.0201
2019-11-04 2019-09-30 13F GALLAGHER ARTHUR J Stock 363576109 3,900 0 0.00 342 0.00 0.0210
2019-08-01 2019-06-30 13F GALLAGHER ARTHUR J Stock 363576109 3,900 -66 -1.66 342 10.32 0.0210
2019-05-20 2019-03-31 13F GALLAGHER ARTHUR J Stock 363576109 3,966 -96 -2.36 310 3.68 0.0218
2019-02-15 2018-12-31 13F GALLAGHER ARTHUR J Stock 363576109 4,062 -2,352 -36.67 299 -37.45 0.0261
2018-11-02 2018-09-30 13F GALLAGHER ARTHUR J Stock 363576109 6,414 27 0.42 478 5.05 0.0349
2018-07-27 2018-06-30 13F GALLAGHER ARTHUR J Stock 363576109 6,387 2,705 73.47 455 79.84 0.0347
2018-04-23 2018-03-31 13F GALLAGHER ARTHUR J Stock 363576109 3,682 2,773 305.06 253 343.86 0.0202
2018-02-08 2017-12-31 13F GALLAGHER ARTHUR J Stock 363576109 909 260 40.06 57 42.50 0.0050
2017-10-12 2017-09-30 13F GALLAGHER ARTHUR J Stock 363576109 649 -56 -7.94 40 0.00 0.0046
2017-08-17 2017-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 705 11 1.59 40 2.56 0.0052
2017-04-28 2017-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 694 -151 -17.87 39 -9.30 0.0057
2016-10-07 2016-09-30 13F GALLAGHER ARTHUR J Stock 363576109 845 -81 -8.75 43 -2.27 0.0081
2016-07-27 2016-06-30 13F GALLAGHER ARTHUR J Stock 363576109 926 0 0.00 44 7.32 0.0100
2016-04-21 2016-03-31 13F GALLAGHER ARTHUR J Stock 363576109 926 0 0.00 41 7.89 0.0112
2016-01-27 2015-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 926 0 0.00 38 0.00 0.0122
2015-10-01 2015-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 926 200 27.55 38 8.57 0.0115
2015-07-02 2015-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 726 26 3.71 35 6.06 0.0103
2015-04-08 2015-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 700 0 0.00 33 3.13 0.0091
2015-01-23 2014-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 700 700 32 0.0100
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.