Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionRench Wealth Management, Inc.
Latest Disclosed Ownership51,772 shares
Latest Disclosed Value $ 11,212,813
Rench Wealth Management, Inc. reports 1.18% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 14, 2026 - Rench Wealth Management, Inc. filed a 13F-HR form disclosing ownership of 51,772 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $11,212,813 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 51,168 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 1.18% 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)
2026-05-14 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 51,772 604 1.18 11,213 -15.32 3.3734
2026-02-12 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 51,168 733 1.45 13,242 -15.24 3.7971
2025-11-12 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 50,435 960 1.94 15,622 -1.36 4.5842
2025-08-13 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 49,475 315 0.64 15,838 -6.68 5.0117
2025-05-15 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 49,160 459 0.94 16,972 22.77 5.8599
2025-02-13 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 48,701 1,148 2.41 13,824 3.31 4.7150
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 47,553 1,378 2.98 13,380 11.75 4.5940
2024-08-13 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 46,175 636 1.40 11,974 5.16 4.2958
2024-05-13 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 45,539 1,488 3.38 11,387 14.94 4.3651
2024-02-14 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 44,051 -485 -1.09 9,906 -2.41 4.1715
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 44,536 -451 -1.00 10,151 2.77 4.6650
2023-08-14 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 44,987 141 0.31 9,878 15.13 4.3309
2023-05-10 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 44,846 -2,553 -5.39 8,579 -4.00 4.1077
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 47,399 -822 -1.70 8,937 8.24 4.5447
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 48,221 -493 -1.01 8,256 3.95 4.6297
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 48,714 -1,313 -2.62 7,942 -9.08 4.0693
2022-05-13 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 50,027 -3,894 -7.22 8,735 -4.53 3.9723
2022-02-14 2021-12-31 13F GALLAGHER AURTHUR J COM 363576109 53,921 -1,803 -3.24 9,149 10.46 4.1251
2021-11-12 2021-09-30 13F GALLAGHER AURTHUR J COM 363576109 55,724 -707 -1.25 8,283 4.78 4.1124
2021-08-13 2021-06-30 13F GALLAGHER AURTHUR J COM 363576109 56,431 -1,769 -3.04 7,905 8.85 3.9457
2021-05-14 2021-03-31 13F GALLAGHER AURTHUR J COM 363576109 58,200 287 0.50 7,262 1.37 3.7792
2021-02-12 2020-12-31 13F GALLAGHER AURTHUR J COM 363576109 57,913 414 0.72 7,164 18.00 4.0335
2020-11-13 2020-09-30 13F GALLAGHER AURTHUR J COM 363576109 57,499 -1,030 -1.76 6,071 6.40 3.8624
2020-08-13 2020-06-30 13F GALLAGHER AURTHUR J COM 363576109 58,529 -2,335 -3.84 5,706 15.02 3.8431
2020-05-14 2020-03-31 13F GALLAGHER AURTHUR J COM 363576109 60,864 -1,776 -2.84 4,961 -16.83 3.8535
2020-02-14 2019-12-31 13F GALLAGHER AURTHUR J COM 363576109 62,640 901 1.46 5,965 7.87 3.4376
2019-11-14 2019-09-30 13F GALLAGHER AURTHUR J COM 363576109 61,739 342 0.56 5,530 2.83 3.5745
2019-08-14 2019-06-30 13F GALLAGHER AURTHUR J COM 363576109 61,397 -1,040 -1.67 5,378 10.30 3.4440
2019-05-14 2019-03-31 13F GALLAGHER AURTHUR J COM 363576109 62,437 -661 -1.05 4,876 4.86 3.1891
2019-02-13 2018-12-31 13F GALLAGHER AURTHUR J COM 363576109 63,098 13 0.02 4,650 -0.98 3.4053
2018-11-14 2018-09-30 13F GALLAGHER AURTHUR J COM 363576109 63,085 23 0.04 4,696 14.06 3.1303
2018-08-14 2018-06-30 13F GALLAGHER AURTHUR J COM 363576109 63,062 -1,516 -2.35 4,117 -7.23 2.9723
2018-05-14 2018-03-31 13F GALLAGHER AURTHUR J COM 363576109 64,578 -2,109 -3.16 4,438 5.17 3.0337
2018-02-06 2017-12-31 13F GALLAGHER AURTHUR J COM 363576109 66,687 1,190 1.82 4,220 4.69 2.7449
2017-11-13 2017-09-30 13F GALLAGHER AURTHUR J COM 363576109 65,497 1,607 2.52 4,031 10.20 2.7757
2017-08-11 2017-06-30 13F GALLAGHER AURTHUR J COM 363576109 63,890 1,016 1.62 3,658 2.90 2.7038
2017-05-11 2017-03-31 13F GALLAGHER AURTHUR J COM 363576109 62,874 -1,314 -2.05 3,555 6.60 2.6373
2017-02-14 2016-12-31 13F GALLAGHER AURTHUR J COM 363576109 64,188 2,798 4.56 3,335 6.79 2.6416
2016-11-14 2016-09-30 13F GALLAGHER AURTHUR J COM 363576109 61,390 -16,742 -21.43 3,123 -16.03 2.5224
2016-08-10 2016-06-30 13F GALLAGHER AURTHUR J COM 363576109 78,132 1,472 1.92 3,719 9.06 3.0035
2016-05-12 2016-03-31 13F GALLAGHER AURTHUR J COM 363576109 76,660 725 0.95 3,410 9.68 2.8026
2016-02-09 2015-12-31 13F GALLAGHER AURTHUR J COM 363576109 75,935 973 1.30 3,109 0.48 2.6826
2015-11-12 2015-09-30 13F GALLAGHER AURTHUR J COM 363576109 74,962 2,583 3.57 3,094 -9.64 2.8410
2015-08-06 2015-06-30 13F GALLAGHER AURTHUR J COM 363576109 72,379 179 0.25 3,424 1.45 2.9854
2015-05-06 2015-03-31 13F GALLAGHER AURTHUR J COM 363576109 72,200 -977 -1.34 3,375 -2.03 2.8900
2015-05-06 2014-12-31 13F/A-1 GALLAGHER AURTHUR J COM 363576109 73,177 -120 -0.16 3,445 3.61 2.8993
2014-10-29 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 73,297 945 1.31 3,325 -1.39 2.8390
2014-07-23 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 72,352 975 1.37 3,372 -0.71 2.9414
2014-04-16 2014-03-31 13F GALLAGHER ARTHUR J COM 363576109 71,377 -15,438 -17.78 3,396 -16.64 3.2165
2014-02-07 2013-12-31 13F GALLAGHER ARTHUR J COM 363576109 86,815 86,815 4,074 3.9421
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.