Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionOld Republic International Corp
Latest Disclosed Ownership190,800 shares
Latest Disclosed Value $ 41,323
Old Republic International Corp ownership in AJG / Arthur J. Gallagher & Co.

On April 27, 2026 - Old Republic International Corp filed a 13F-HR form disclosing ownership of 190,800 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $41,323 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 190,800 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 0.00% 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)
2026-04-27 2026-03-31 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 41 -16.33 1.6423
2026-02-09 2025-12-31 13F ARTHUR J GALLAGHER COMMON 363576109 190,800 0 0.00 49 -16.95 1.9946
2025-10-27 2025-09-30 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 59 -3.28 2.1914
2025-07-09 2025-06-30 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 61 -6.15 2.3947
2025-04-29 2025-03-31 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 66 20.37 2.5587
2025-02-04 2024-12-31 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 54 1.89 2.1335
2024-10-25 2024-09-30 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 54 8.16 2.0134
2024-07-29 2024-06-30 13F ARTHUR J GALLAGHER Common 363576109 190,800 0 0.00 49 4.26 2.0148
2024-04-29 2024-03-31 13F ARTHUR J GALLAGHER Common 363576109 190,800 -124,000 -39.39 48 -32.86 1.8763
2024-02-07 2023-12-31 13F ARTHUR J GALLAGHER Common 363576109 314,800 -2,100 -0.66 71 -2.78 2.6675
2023-11-06 2023-09-30 13F ARTHUR J GALLAGHER Common 363576109 316,900 -17,200 -5.15 72 -1.37 2.6965
2023-08-04 2023-06-30 13F ARTHUR J GALLAGHER Common 363576109 334,100 0 0.00 73 15.87 2.4068
2023-05-18 2023-03-31 13F GALLAGHER ARTHUR J Common 363576109 334,100 0 0.00 64 1.61 2.0443
2023-02-21 2022-12-31 13F GALLAGHER ARTHUR J Common 363576109 334,100 0 0.00 63 -99.89 1.9761
2022-11-18 2022-09-30 13F GALLAGHER ARTHUR J Common 363576109 334,100 -133,300 -28.52 57,205 -24.93 1.8995
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J Common 363576109 467,400 0 0.00 76,205 -6.62 1.8385
2022-05-13 2022-03-31 13F GALLAGHER ARTHUR J Common 363576109 467,400 -4,000 -0.85 81,608 2.03 1.6556
2022-02-17 2021-12-31 13F GALLAGHER ARTHUR J Common 363576109 471,400 0 0.00 79,982 14.14 1.5199
2021-11-04 2021-09-30 13F GALLAGHER ARTHUR J Common 363576109 471,400 0 0.00 70,074 6.12 1.4631
2021-07-29 2021-06-30 13F GALLAGHER ARTHUR J Common 363576109 471,400 0 0.00 66,034 12.27 1.2786
2021-05-17 2021-03-31 13F GALLAGHER ARTHUR J Common 363576109 471,400 0 0.00 58,817 0.86 1.3888
2021-03-03 2020-12-31 13F GALLAGHER ARTHUR J Common 363576109 471,400 0 0.00 58,317 17.17 1.4499
2020-11-04 2020-09-30 13F GALLAGHER ARTHUR J Common 363576109 471,400 -2,100 -0.44 49,770 7.82 1.3620
2020-11-04 2020-06-30 13F/A-1 GALLAGHER ARTHUR J Common 363576109 473,500 0 0.00 46,162 19.61 1.3067
2020-09-17 2020-06-30 13F GALLAGHER ARTHUR J Common 363576109 473,500 0 19,176 599,099.4763
2020-05-07 2020-03-31 13F GALLAGHER ARTHUR J Common 363576109 473,500 0 0.00 38,595 -14.41 1.2104
2020-01-29 2019-12-31 13F GALLAGHER ARTHUR J Common 363576109 473,500 -319,200 -40.27 45,091 -36.49 1.1278
2019-10-31 2019-09-30 13F GALLAGHER ARTHUR J Common 363576109 792,700 0 0.00 71,002 2.26 1.8990
2019-08-13 2019-06-30 13F GALLAGHER ARTHUR J Common 363576109 792,700 0 0.00 69,433 12.15 1.7970
2019-04-26 2019-03-31 13F GALLAGHER ARTHUR J Common 363576109 792,700 0 0.00 61,910 5.97 1.6676
2019-01-29 2018-12-31 13F GALLAGHER ARTHUR J Common 363576109 792,700 0 0.00 58,422 -0.99 1.7421
2018-10-31 2018-09-30 13F GALLAGHER ARTHUR J Common 363576109 792,700 0 0.00 59,009 14.03 1.7132
2018-08-03 2018-06-30 13F GALLAGHER ARTHUR J Common 363576109 792,700 -56,500 -6.65 51,747 -11.34 1.5958
2018-05-18 2018-03-31 13F/A-1 GALLAGHER ARTHUR J Common 363576109 849,200 0 0.00 58,366 8.61 1.8695
2018-05-17 2018-03-31 13F GALLAGHER ARTHUR J Common 363576109 849,200 0 58,366 1,738,874.9956
2018-02-20 2017-12-31 13F GALLAGHER ARTHUR J Common 363576109 849,200 0 0.00 53,737 2.81 1.7067
2017-11-01 2017-09-30 13F GALLAGHER ARTHUR J Common 363576109 849,200 -55,200 -6.10 52,268 0.95 1.7285
2017-08-02 2017-06-30 13F GALLAGHER ARTHUR J Common 363576109 904,400 0 0.00 51,777 1.26 1.6882
2017-05-22 2017-03-31 13F GALLAGHER ARTHUR J Common 363576109 904,400 0 0.00 51,135 8.81 1.7623
2017-01-31 2016-12-31 13F GALLAGHER ARTHUR J Common 363576109 904,400 0 0.00 46,993 22.42 1.6862
2016-11-17 2016-09-30 13F GALLAGHER ARTHUR J Common 363576109 904,400 0 0.00 38,386 -10.83 1.6635
2016-08-02 2016-06-30 13F GALLAGHER ARTHUR J Common 363576109 904,400 0 0.00 43,049 7.01 1.9236
2016-05-25 2016-03-31 13F GALLAGHER ARTHUR J Common 363576109 904,400 126,000 16.19 40,228 26.23 1.9841
2016-02-26 2015-12-31 13F GALLAGHER ARTHUR J Common 363576109 778,400 89,000 12.91 31,868 7.16 1.7083
2015-11-04 2015-09-30 13F GALLAGHER ARTHUR J Common 363576109 689,400 108,000 18.58 29,739 8.14 1.6250
2015-08-05 2015-06-30 13F GALLAGHER ARTHUR J Common 363576109 581,400 0 0.00 27,500 1.18 1.5763
2015-06-18 2015-03-31 13F GALLAGHER ARTHUR J Common 363576109 581,400 0 0.00 27,180 -0.70 1.5162
2015-02-27 2014-12-31 13F GALLAGHER ARTHUR J Common 363576109 581,400 19,000 3.38 27,372 7.30 1.5646
2014-11-07 2014-09-30 13F GALLAGHER ARTHUR J Common 363576109 562,400 10,600 1.92 25,510 -0.79 2.0702
2014-08-06 2014-06-30 13F GALLAGHER ARTHUR J Common 363576109 551,800 241,800 78.00 25,714 74.33 2.2371
2014-05-06 2014-03-31 13F GALLAGHER ARTHUR J Common 363576109 310,000 43,000 16.10 14,750 17.72 1.5690
2014-02-18 2013-12-31 13F/A-1 GALLAGHER ARTHUR J Common 363576109 267,000 267,000 12,530 1.6413
2014-02-14 2013-12-31 13F GALLAGHER ARTHUR J Common 363576109 10,488,738 12,530
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.