Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionFiduciary Trust Co
Latest Disclosed Ownership4,334 shares
Latest Disclosed Value $ 938,658
Fiduciary Trust Co reports 3.17% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 15, 2026 - Fiduciary Trust Co filed a 13F-HR form disclosing ownership of 4,334 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $938,658 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 4,476 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -3.17% 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.

Upgrade to unlock premium data and export to Excel .

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 4,334 -142 -3.17 939 -19.00 0.0065
2026-02-13 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,476 146 3.37 1,158 -13.65 0.0132
2025-11-14 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,330 31 0.72 1,341 -2.54 0.0152
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,299 205 5.01 1,376 -2.62 0.0169
2025-05-15 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,094 167 4.25 1,413 26.84 0.0185
2025-02-14 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,927 280 7.68 1,115 8.58 0.0147
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,647 0 0.00 1,026 8.57 0.0143
2024-08-14 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,647 160 4.59 946 8.50 0.0142
2024-05-14 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,487 -321 -8.43 872 1.75 0.0134
2024-02-12 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,808 469 14.05 856 12.48 0.0143
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,339 646 23.99 761 28.76 0.0139
2023-08-01 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,693 2 0.07 591 14.98 0.0104
2023-05-15 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,691 -1,056 -28.18 515 -27.20 0.0095
2023-02-14 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,747 -4 -0.11 706 9.97 0.0137
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,751 4 0.11 642 5.07 0.0139
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,747 0 0.00 611 -6.57 0.0129
2022-05-12 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,747 -716 -16.04 654 -13.61 0.0117
2022-02-14 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,463 0 0.00 757 14.18 0.0124
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,463 0 0.00 663 6.08 0.0118
2021-08-16 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,463 112 2.57 625 15.10 0.0121
2021-05-19 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,351 0 0.00 543 0.93 0.0110
2021-01-26 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,351 0 0.00 538 17.21 0.0112
2020-11-13 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,351 -8 -0.18 459 8.00 0.0108
2020-08-13 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,359 4,359 425 0.0105
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.