Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionPrivate Advisor Group, LLC
Latest Disclosed Ownership33,306 shares
Latest Disclosed Value $ 7,213,328
Private Advisor Group, LLC reports 1.24% increase in ownership of AJG / Arthur J. Gallagher & Co.

On April 24, 2026 - Private Advisor Group, LLC filed a 13F-HR form disclosing ownership of 33,306 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $7,213,328 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 32,899 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 1.24% 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)
2026-04-24 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 33,306 407 1.24 7,213 -15.27 0.0320
2026-02-17 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 32,899 840 2.62 8,514 -14.26 0.0383
2025-11-13 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 32,059 2,115 7.06 9,930 3.59 0.0488
2025-08-11 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 29,944 -21 -0.07 9,586 -7.35 0.0516
2025-05-05 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,965 -3 -0.01 10,345 21.62 0.0626
2025-02-03 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 29,968 -864 -2.80 8,506 -1.95 0.0479
2024-10-22 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 30,832 1,533 5.23 8,675 14.19 0.0539
2024-08-05 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 29,299 -202 -0.68 7,598 3.00 0.0510
2024-04-30 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,501 -5,815 -16.47 7,376 -7.11 0.0530
2024-02-06 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 35,316 2,353 7.14 7,942 5.70 0.0617
2023-11-03 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 32,963 -132 -0.40 7,513 5.17 0.0671
2023-08-10 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 33,095 270 0.82 7,144 13.78 0.0621
2023-05-10 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 32,825 -1,403 -4.10 6,280 31.86 0.0600
2023-01-18 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 34,228 -253 -0.73 4,763 -19.34 0.2398
2022-10-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 34,481 -6,898 -16.67 5,904 -12.48 0.0679
2022-07-13 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 41,379 7,535 22.26 6,746 14.18 0.0602
2022-05-12 2022-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 33,844 1,748 5.45 5,908 8.48 0.0453
2022-05-10 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 32,096 0 5,446 0.0409
2022-02-10 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 32,096 -27,831 -46.44 5,446 -38.87 0.0409
2021-10-14 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 59,927 39,686 196.07 8,909 214.14 0.0566
2021-08-12 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 20,241 759 3.90 2,836 16.66 0.0248
2021-04-22 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 19,482 12,345 172.97 2,431 175.31 0.0232
2021-04-01 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 7,137 1,738 32.19 883 59.96 0.0092
2020-11-02 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 5,399 -148 -2.67 552 2.03 0.0072
2020-08-17 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 5,547 975 21.33 541 45.04 0.0075
2020-05-12 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,572 935 25.71 373 7.80 0.0068
2020-02-10 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,637 1,038 39.94 346 48.50 0.0054
2019-11-13 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,599 -1,745 -40.17 233 -38.68 0.0036
2019-08-14 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,344 -3 -0.07 380 12.09 0.0069
2019-05-13 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,347 244 5.95 339 12.25 0.0067
2019-02-08 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,103 747 22.26 302 20.80 0.0073
2018-11-01 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,356 3,356 250 0.0051
2018-02-07 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 0 -8,705 -100.00 0 -100.00
2017-11-13 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 8,705 995 12.91 536 20.99 0.0133
2017-08-10 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 7,710 -885 -10.30 443 -8.09 0.0120
2017-05-10 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 8,595 1,494 21.04 482 29.22 0.0135
2017-02-09 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 7,101 7,101 373 0.0122
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.