Arthur J. Gallagher & Co.
US ˙ NYSE ˙ US3635761097

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionSmithfield Trust Co
Latest Disclosed Ownership2,224 shares
Latest Disclosed Value $ 480
Smithfield Trust Co reports 4.76% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 8, 2026 - Smithfield Trust Co filed a 13F-HR form disclosing ownership of 2,224 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $481,674 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 2,123 shares of Arthur J. Gallagher & Co.. The current value of the position is $450,360 USD.

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)
2026-05-08 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,224 101 4.76 0 0.0209
2026-02-09 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,123 0 0.00 1 0.0243
2025-11-07 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,123 0 0.00 1 0.0293
2025-08-08 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,123 0 0.00 1 0.0321
2025-05-09 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,123 0 0.00 1 0.0367
2025-02-06 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,123 0 0.00 1 0.0301
2024-11-12 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,123 0 0.00 1 0.0293
2024-07-31 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,123 15 0.71 1 0.0288
2024-05-07 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,108 0 0.00 1 0.0282
2024-02-07 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,108 0 0.00 0 0.0266
2023-11-06 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,108 0 0.00 0 0.0296
2023-08-08 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,108 0 0.00 0 0.0279
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,108 0 0.00 0 0.0259
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,108 69 3.38 0 -100.00 0.0269
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,039 0 0.00 350 5.11 0.0252
2022-08-11 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,039 0 0.00 333 -5.93 0.0234
2022-05-16 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,039 0 0.00 354 2.31 0.0228
2022-02-14 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,039 0 0.00 346 15.33 0.0214
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,039 0 0.00 300 4.90 0.0198
2021-07-26 2021-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 2,039 0 0.00 286 12.60 0.0190
2021-05-14 2021-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 2,039 0 0.00 254 0.79 0.0175
2021-02-12 2020-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 2,039 0 0.00 252 16.67 0.0183
2020-11-16 2020-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 2,039 55 2.77 216 11.92 0.0176
2020-08-14 2020-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,984 399 25.17 193 49.61 0.0174
2020-05-05 2020-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,585 100 6.73 129 -8.51 0.0135
2020-02-13 2019-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,485 20 1.37 141 7.63 0.0131
2019-10-30 2019-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,465 0 0.00 131 2.34 0.0130
2019-08-06 2019-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,465 0 0.00 128 12.28 0.0132
2019-04-30 2019-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,465 0 0.00 114 5.56 0.0124
2019-02-04 2018-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,465 0 0.00 108 -0.92 0.0126
2018-11-06 2018-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,465 0 0.00 109 13.54 0.0118
2018-07-16 2018-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,465 -220 -13.06 96 -17.24 0.0111
2018-05-10 2018-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,685 -280 -14.25 116 -6.45 0.0141
2018-02-02 2017-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,965 375 23.58 124 26.53 0.0151
2017-11-03 2017-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,590 470 41.96 98 50.77 0.0133
2017-07-31 2017-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,120 0 0.00 65 3.17 0.0095
2017-05-01 2017-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,120 -68 -5.72 63 1.61 0.0099
2017-02-08 2016-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,188 0 0.00 62 1.64 0.0104
2016-11-03 2016-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 1,188 220 22.73 61 32.61 0.0109
2016-07-29 2016-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 968 900 1,323.53 46 1,433.33 0.0086
2016-05-05 2016-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2016-02-04 2015-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2015-11-05 2015-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2015-07-24 2015-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2015-05-06 2015-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 68 0.00 3 0.0006
2015-02-02 2014-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 0 -68 -100.00 0 -100.00
2014-10-21 2014-09-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2014-07-16 2014-06-30 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2014-05-06 2014-03-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 0 0.00 3 0.00 0.0006
2014-01-16 2013-12-31 13F GALLAGHER ARTHUR J & CO COM COMMON STOCK 363576109 68 68 3 0.0006
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.