Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership62,480 shares
Latest Disclosed Value $ 13,531,918
Rafferty Asset Management, LLC reports 20.25% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 62,480 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $13,531,918 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 78,346 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -20.25% 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 62,480 -15,866 -20.25 13,532 -33.26 0.0549
2026-02-13 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 78,346 -6,968 -8.17 20,275 -23.27 0.0700
2025-11-12 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 85,314 165 0.19 26,425 -3.05 0.0857
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 85,149 1,762 2.11 27,258 -5.32 0.0899
2025-05-14 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 83,387 -4,650 -5.28 28,789 15.20 0.1227
2025-02-14 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 88,037 13,755 18.52 24,989 19.56 0.0884
2024-11-13 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 74,282 -2,569 -3.34 20,901 4.88 0.0716
2024-08-13 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 76,851 590 0.77 19,928 4.51 0.0740
2024-05-13 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 76,261 -263 -0.34 19,068 10.81 0.0711
2024-02-13 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 76,524 4,196 5.80 17,209 4.39 0.0726
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 72,328 3,633 5.29 16,486 9.30 0.0969
2023-08-11 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 68,695 -2,793 -3.91 15,083 10.29 0.0850
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 71,488 -9,683 -11.93 13,676 -10.63 0.0927
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 81,171 8,924 12.35 15,304 23.71 0.1281
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 72,247 6,155 9.31 12,370 14.79 0.1317
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 66,092 -37,025 -35.91 10,776 -40.15 0.0992
2022-05-13 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 103,117 -4,996 -4.62 18,004 -1.85 0.1067
2022-02-10 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 108,113 9,709 9.87 18,344 25.40 0.0965
2021-11-10 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 98,404 -16,202 -14.14 14,628 -8.88 0.0999
2021-08-10 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 114,606 18,355 19.07 16,054 33.68 0.1011
2021-05-10 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 96,251 17,041 21.51 12,009 22.55 0.0820
2021-02-10 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 79,210 14,186 21.82 9,799 42.74 0.0958
2020-11-13 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 65,024 15,799 32.10 6,865 43.05 0.0830
2020-08-07 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 49,225 42,565 639.11 4,799 783.79 0.0676
2020-05-15 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 6,660 -23,496 -77.91 543 -81.09 0.0227
2020-02-10 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 30,156 2,381 8.57 2,872 15.43 0.0442
2019-11-14 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 27,775 -3,456 -11.07 2,488 -9.06 0.0389
2019-08-09 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 31,231 -5,238 -14.36 2,736 -3.93 0.0481
2019-05-15 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 36,469 5,127 16.36 2,848 23.29 0.0458
2019-02-11 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 31,342 -11,139 -26.22 2,310 -26.94 0.0504
2018-11-09 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 42,481 -4,816 -10.18 3,162 2.40 0.0490
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 47,297 1,441 3.14 3,088 -2.03 0.0461
2018-05-15 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 45,856 7,014 18.06 3,152 28.23 0.0467
2018-02-14 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 38,842 9,136 30.75 2,458 34.46 0.0425
2017-11-13 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 29,706 3,324 12.60 1,828 21.06 0.0410
2017-08-11 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 26,382 -5,441 -17.10 1,510 -16.06 0.0433
2017-05-11 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 31,823 22,996 260.52 1,799 291.94 0.0396
2017-02-13 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 8,827 -2,436 -21.63 459 -19.90 0.0210
2016-11-14 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 11,263 -7,656 -40.47 573 -36.40 0.0209
2016-08-09 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 18,919 -3,244 -14.64 901 -8.62 0.0609
2016-05-12 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 22,163 7,133 47.46 986 58.52 0.0536
2016-02-12 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 15,030 -1,638 -9.83 622 -9.59 0.0748
2015-11-12 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 16,668 8,406 101.74 688 75.96 0.0543
2015-08-12 2015-06-30 13F GALLAGHER ARTHUR J COM 363576109 8,262 -1,931 -18.94 391 -18.03 0.0263
2015-05-14 2015-03-31 13F GALLAGHER ARTHUR J COM 363576109 10,193 5,720 127.88 477 126.07 0.0360
2015-02-13 2014-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,473 -809 -15.32 211 -12.08 0.0479
2014-11-14 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 5,282 -2,174 -29.16 240 -30.84 0.0258
2014-08-13 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 7,456 7,456 53.42 347 63.68 0.0667
2013-11-08 2013-09-30 13F GALLAGHER ARTHUR J COM 363576109 0 -4,860 -100.00 0 -100.00
2013-08-13 2013-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,860 4,860 212 0.0292
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.