Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionStrategy Asset Managers Llc
Latest Disclosed Ownership29,720 shares
Latest Disclosed Value $ 6,436,676
Strategy Asset Managers Llc reports 0.40% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 12, 2026 - Strategy Asset Managers Llc filed a 13F-HR form disclosing ownership of 29,720 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $6,436,676 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 29,603 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 0.40% 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)
2026-05-12 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,720 117 0.40 6,437 -15.98 1.0563
2026-02-11 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 29,603 827 2.87 7,661 -14.06 1.2594
2025-11-04 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 28,776 -1,157 -3.87 8,913 -6.98 1.6033
2025-08-07 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 29,933 670 2.29 9,582 -5.15 1.7890
2025-05-09 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,263 -1,039 -3.43 10,103 17.45 2.0825
2025-02-12 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 30,302 -370 -1.21 8,601 -0.34 1.6681
2024-11-08 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 30,672 -5,065 -14.17 8,630 9.99 1.6568
2024-08-02 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 35,737 4,085 12.91 7,847 -0.86 1.7419
2024-04-25 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 31,652 876 2.85 7,914 14.36 1.6945
2024-02-12 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 30,776 -151 -0.49 6,921 -1.83 1.6407
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 30,927 -4,810 -13.46 7,049 -10.16 1.8439
2023-08-25 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 35,737 989 2.85 7,847 18.04 1.7419
2023-05-02 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 34,748 1,603 4.84 6,648 110,683.33 1.6204
2023-01-13 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 33,145 -1,576 -4.54 6 -99.90 1.5876
2022-10-11 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 34,721 -6,960 -16.70 5,945 -12.52 1.6142
2022-07-13 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 41,681 348 0.84 6,796 -5.83 2.0917
2022-04-11 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 41,333 1,238 3.09 7,217 6.09 1.5618
2022-01-14 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 40,095 -2,303 -5.43 6,803 7.95 1.7661
2021-12-14 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 42,398 -151 -0.35 6,302 5.74 1.4017
2021-08-04 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 42,549 622 1.48 5,960 13.94 1.2603
2021-05-12 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 41,927 -5,752 -12.06 5,231 -11.32 1.1993
2021-02-10 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 47,679 -2,807 -5.56 5,899 10.68 1.4082
2020-11-03 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 50,486 7,448 17.31 5,330 27.03 1.3822
2020-08-10 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 43,038 355 0.83 4,196 20.61 1.1241
2020-05-14 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 42,683 -6,310 -12.88 3,479 -25.42 1.1202
2020-02-13 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 48,993 4,730 10.69 4,665 17.65 1.1503
2019-11-13 2019-09-30 13F GALLAGHER ARTHUR J &CO COM Common Stock 363576109 44,263 -2,187 -4.71 3,965 -2.56 1.1808
2019-08-14 2019-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 46,450 -622 -1.32 4,069 10.69 1.1521
2019-05-08 2019-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 47,072 -1 -0.00 3,676 5.97 0.8266
2019-02-14 2018-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 47,073 -2,608 -5.25 3,469 -6.19 0.8469
2018-11-01 2018-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 49,681 -43,398 -46.62 3,698 -39.14 0.7519
2018-08-07 2018-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 93,079 -758 -0.81 6,076 -5.78 1.2843
2018-05-03 2018-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 93,837 40,581 76.20 6,449 91.36 1.3978
2018-01-29 2017-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 53,256 -173 -0.32 3,370 2.46 0.6588
2017-11-06 2017-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 53,429 -638 -1.18 3,289 6.27 0.6738
2017-08-07 2017-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 54,067 14,880 37.97 3,095 39.67 0.6365
2017-04-28 2017-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 39,187 1,227 3.23 2,216 8.36 0.4811
2017-02-01 2016-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 37,960 358 0.95 2,045 6.90 0.4474
2016-10-31 2016-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 37,602 634 1.71 1,913 8.69 0.4289
2016-08-04 2016-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 36,968 763 2.11 1,760 9.32 0.4000
2016-04-29 2016-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 36,205 2,362 6.98 1,610 16.16 0.3660
2016-01-29 2015-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 33,843 1,767 5.51 1,386 4.68 0.3153
2015-11-05 2015-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 32,076 2,912 9.98 1,324 -3.99 0.3177
2015-08-04 2015-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 29,164 1,856 6.80 1,379 7.99 0.3076
2015-05-08 2015-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 27,308 27,308 0.00 1,277 0.2789
2015-02-03 2014-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 0 -23,819 -100.00 0 -100.00
2014-11-12 2014-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 23,819 596 2.57 1,080 -0.18 0.2360
2014-08-08 2014-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 23,223 162 0.70 1,082 -1.37 0.2303
2014-05-06 2014-03-31 13F GALLAGHER ARTH Common Stock 363576109 23,061 1,198 5.48 1,097 6.92 0.2360
2014-02-10 2013-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 21,863 1,663 8.23 1,026 16.33 0.2248
2013-11-13 2013-09-30 13F GALLAGHER ARTHUR J &CO COM Common Stock 363576109 20,200 436 2.21 882 2.20 0.2081
2013-08-14 2013-06-30 13F GALLAGHER ARTHUR J &CO COM Common Stock 363576109 19,764 19,764 863 0.2052
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.