Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionFirst Citizens Bank & Trust Co
Latest Disclosed Ownership1,470 shares
Latest Disclosed Value $ 318,372
First Citizens Bank & Trust Co reports 9.32% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 13, 2026 - First Citizens Bank & Trust Co filed a 13F-HR form disclosing ownership of 1,470 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $318,372 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 1,621 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -9.32% 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)
2026-05-13 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 1,470 -151 -9.32 318 -24.11 0.0067
2026-02-18 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 1,621 -38,636 -95.97 419 -96.64 0.0088
2025-10-31 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 40,257 -812 -1.98 12,469 -5.16 0.2689
2025-07-30 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 41,069 11,622 39.47 13,147 29.32 0.2380
2025-04-14 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,447 1,527 5.47 10,166 28.28 0.2582
2025-01-21 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 27,920 -595 -2.09 7,925 -1.22 0.1455
2024-10-17 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 28,515 -562 -1.93 8,023 6.42 0.1763
2024-07-19 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 29,077 608 2.14 7,540 5.91 0.1422
2024-04-15 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 28,469 4,089 16.77 7,118 29.84 0.1363
2024-01-22 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 24,380 23,487 2,630.12 5,483 2,600.49 0.0995
2023-10-30 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 893 893 204 0.0040
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 0 -1,069 -100.00 0 0.0000
2023-01-24 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 1,069 -11,901 -91.76 0 -100.00 0.0061
2022-10-20 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 12,970 4,831 59.36 2,221 67.37 0.0729
2022-07-26 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 8,139 -1,203 -12.88 1,327 -18.64 0.0469
2022-04-26 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 9,342 -1,022 -9.86 1,631 -7.22 0.0634
2022-03-11 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,364 -3,270 -23.98 1,758 -13.27 0.0688
2021-10-15 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 13,634 272 2.04 2,027 8.34 0.0968
2021-07-14 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 13,362 1,374 11.46 1,871 25.15 0.0887
2021-04-14 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 11,988 5,951 98.58 1,495 100.13 0.0705
2021-01-13 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 6,037 -1,774 -22.71 747 -9.45 0.0382
2020-10-15 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 7,811 159 2.08 825 10.59 0.0581
2020-07-15 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 7,652 1,411 22.61 746 46.56 0.0623
2020-04-17 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 6,241 -61 -0.97 509 -15.17 0.0615
2020-01-15 2019-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 6,302 -225 -3.45 600 2.56 0.0577
2020-01-15 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 6,527 0 585 43,881.6920
2019-10-17 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,527 807 14.11 585 16.77 0.0705
2019-07-11 2019-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 5,720 5,720 501 0.0546
2017-02-06 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 0 -7,195 -100.00 0 -100.00
2016-10-28 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 7,195 -4,745 -39.74 366 -29.75 0.0333
2013-10-25 2013-09-30 13F GALLAGHER ARTHUR J COM 363576109 11,940 1,006 9.20 521 9.00 0.0199
2013-08-06 2013-06-30 13F GALLAGHER ARTHUR J COM 363576109 10,934 10,934 478 0.0196
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.