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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionCENTRAL TRUST Co
Latest Disclosed Ownership17,201 shares
Latest Disclosed Value $ 3,725,394
CENTRAL TRUST Co reports 9.14% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On April 17, 2026 - CENTRAL TRUST Co filed a 13F-HR form disclosing ownership of 17,201 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $3,725,393 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 18,932 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -9.14% during the quarter. The current value of the position is $3,483,202 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)
2026-04-17 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 17,201 -1,731 -9.14 3,725 -23.96 0.0397
2026-02-02 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 18,932 -977 -4.91 4,899 -20.55 0.0960
2025-11-06 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 19,909 -1,102 -5.24 6,167 -8.33 0.1289
2025-08-07 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 21,011 50 0.24 6,726 -7.05 0.1552
2025-04-18 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 20,961 -320 -1.50 7,237 19.80 0.1779
2025-01-24 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 21,281 208 0.99 6,041 1.87 0.1480
2024-10-22 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 21,073 -69 -0.33 5,929 8.15 0.1389
2024-08-05 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 21,142 1,415 7.17 5,482 11.15 0.1343
2024-04-24 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 19,727 1,298 7.04 4,933 19.02 0.1228
2024-01-24 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 18,429 -304 -1.62 4,144 -2.93 0.1101
2023-10-26 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 18,733 -581 -3.01 4,270 0.68 0.1232
2023-07-26 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 19,314 -260 -1.33 4,241 13.25 0.1183
2023-04-19 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 19,574 -570 -2.83 3,745 -1.40 0.1095
2023-01-26 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 20,144 -254 -1.25 3,798 8.70 0.1171
2022-11-17 2022-09-30 13F/A-2 GALLAGHER ARTHUR J COM 363576109 20,398 -590 -2.81 3,493 2.07 0.1198
2022-11-04 2022-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 20,988 0 3,422 0.0614
2022-11-03 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 20,988 0 3,422 0.0614
2022-08-09 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 20,988 -141 -0.67 3,422 -7.24 0.1129
2022-05-03 2022-03-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 21,129 -1,352 -6.01 3,689 -3.28 0.1056
2022-02-08 2021-12-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 22,481 260 1.17 3,814 15.47 0.1075
2021-10-19 2021-09-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 22,221 -662 -2.89 3,303 3.06 0.1177
2021-07-23 2021-06-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 22,883 -4,217 -15.56 3,205 -5.21 0.1163
2021-04-23 2021-03-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 27,100 -1,858 -6.42 3,381 -5.64 0.1323
2021-01-29 2020-12-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 28,958 914 3.26 3,583 21.01 0.1465
2020-10-22 2020-09-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 28,044 138 0.49 2,961 8.82 0.1340
2020-07-14 2020-06-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 27,906 8,519 43.94 2,721 72.22 0.1365
2020-04-17 2020-03-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,387 -4 -0.02 1,580 -14.46 0.0968
2020-01-21 2019-12-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,391 124 0.64 1,847 7.01 0.0945
2019-10-28 2019-09-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,267 0 0.00 1,726 -1.99 0.0973
2019-07-12 2019-06-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,267 29 0.15 1,761 17.24 0.1003
2019-04-26 2019-03-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,238 0 0.00 1,502 5.92 0.0896
2019-01-08 2018-12-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,238 -39 -0.20 1,418 -1.18 0.0943
2018-10-04 2018-09-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,277 1,166 6.44 1,435 21.40 0.0834
2018-07-09 2018-06-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 18,111 0 0.00 1,182 -5.06 0.0754
2018-04-04 2018-03-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 18,111 0 0.00 1,245 8.64 0.0790
2018-01-23 2017-12-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 18,111 0 0.00 1,146 2.78 0.0698
2017-10-17 2017-09-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 18,111 -1,070 -5.58 1,115 1.55 0.0721
2017-07-14 2017-06-30 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,181 0 0.00 1,098 1.29 0.0726
2017-04-06 2017-03-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,181 0 0.00 1,084 8.73 0.0721
2017-01-24 2016-12-31 13F ARTHUR J GALLAGHER COMMON STOCK 363576109 19,181 434 2.32 997 4.51 0.0687
2016-10-24 2016-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 18,747 -5,000 -21.06 954 -15.58 0.0696
2016-08-08 2016-06-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 23,747 0 0.00 1,130 7.01 0.0845
2016-04-11 2016-03-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 23,747 0 0.00 1,056 8.64 0.0833
2016-01-21 2015-12-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 23,747 -998 -4.03 972 -4.80 0.0803
2015-10-14 2015-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 24,745 0 0.00 1,021 -12.74 0.0888
2015-07-28 2015-06-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 24,745 -4,002 -13.92 1,170 -12.95 0.0920
2015-04-09 2015-03-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 28,747 20,947 268.55 1,344 266.21 0.1082
2015-01-16 2014-12-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 7,800 0 0.00 367 3.67 0.0299
2014-10-23 2014-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 7,800 0 0.00 354 -4.58 0.0281
2014-05-07 2014-03-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 7,800 0 0.00 371 1.37 0.0307
2014-01-27 2013-12-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 7,800 0 0.00 366 7.65 0.0307
2013-10-24 2013-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 7,800 0 0.00 340 -0.29 0.0308
2013-08-13 2013-06-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 7,800 7,800 341 0.0324
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.