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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionAmalgamated Bank
Latest Disclosed Ownership46,611 shares
Latest Disclosed Value $ 10,095
Amalgamated Bank reports 2.19% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 46,611 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $10,095,010 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 47,654 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -2.19% during the quarter. The current value of the position is $9,438,728 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 46,611 -1,043 -2.19 10 -16.67 0.0773
2026-02-05 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 47,654 -1,981 -3.99 12 -20.00 0.0890
2025-10-29 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 49,635 -722 -1.43 15 -6.25 0.1098
2025-08-04 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 50,357 1,205 2.45 16 0.00 0.1244
2025-04-25 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 49,152 780 1.61 17 23.08 0.1452
2025-02-04 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 48,372 5,274 12.24 14 8.33 0.1127
2024-10-30 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 43,098 -1,015 -2.30 12 9.09 0.0999
2024-08-12 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 44,113 -483 -1.08 11 0.00 0.0974
2024-04-23 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 44,596 -9,296 -17.25 11 -8.33 0.0954
2024-02-06 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 53,892 -3,256 -5.70 12 -7.69 0.0967
2023-11-08 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 57,148 1,843 3.33 13 8.33 0.1109
2023-08-11 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 55,305 -112 -0.20 12 20.00 0.0983
2023-05-02 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 55,417 642 1.17 11 0.00 0.0904
2023-02-10 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 54,775 -47 -0.09 10 -99.89 0.0921
2022-11-09 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 54,822 -917 -1.65 9,387 3.29 0.0906
2022-08-15 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 55,739 1,352 2.49 9,088 -4.30 0.0847
2022-08-25 2022-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 54,387 -3,747 -6.45 9,496 -3.73 0.0738
2022-06-30 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 54,387 -3,747 9,496 0.0754
2022-02-15 2021-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 58,134 93 0.16 9,864 14.33 0.0728
2022-02-15 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 58,134 93 9,864 0.0728
2021-10-29 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 58,041 287 0.50 8,628 6.65 0.0728
2021-08-16 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 57,754 47,297 452.30 8,090 519.92 0.0649
2021-05-13 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 10,457 -371 -3.43 1,305 -2.61 0.0489
2021-02-12 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,828 114 1.06 1,340 18.48 0.0508
2020-10-30 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 10,714 -213 -1.95 1,131 6.20 0.0492
2020-08-10 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 10,927 -16,785 -60.57 1,065 -52.86 0.0493
2020-05-13 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 27,712 -873 -3.05 2,259 -17.01 0.0552
2020-02-13 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 28,585 1,622 6.02 2,722 12.71 0.0501
2019-11-13 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 26,963 1,021 3.94 2,415 6.29 0.0508
2019-08-14 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 25,942 3,071 13.43 2,272 27.21 0.0530
2019-05-15 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 22,871 607 2.73 1,786 8.84 0.0433
2019-02-15 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 22,264 -400 -1.76 1,641 -2.73 0.0465
2018-11-14 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 22,664 -562 -2.42 1,687 11.28 0.0417
2018-07-18 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 23,226 -16,715 -41.85 1,516 -44.77 0.0370
2018-05-22 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 39,941 1,968 5.18 2,745 14.23 0.0728
2018-02-13 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 37,973 1,924 5.34 2,403 8.29 0.0650
2017-11-09 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 36,049 187 0.52 2,219 8.09 0.0691
2017-08-10 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 35,862 7,541 26.63 2,053 28.23 0.0673
2017-05-12 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 28,321 -3,735 -11.65 1,601 -3.90 0.0797
2017-02-14 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 32,056 3,215 11.15 1,666 13.57 0.0753
2016-11-15 2016-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 28,841 33 0.11 1,467 2.37 0.0851
2016-11-14 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,313 219
2016-08-16 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 28,808 8,276 40.31 1,433 56.96 0.0829
2016-05-11 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 20,532 1,641 8.69 913 18.11 0.0890
2016-02-10 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 18,891 -1,262 -6.26 773 -7.09 0.0954
2015-11-04 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 20,153 272 1.37 832 -11.49 0.0873
2015-07-10 2015-06-30 13F GALLAGHER ARTHUR J COM 363576109 19,881 2,136 12.04 940 13.25 0.0923
2015-04-22 2015-03-31 13F GALLAGHER ARTHUR J COM 363576109 17,745 17,745 0.00 830 0.1013
2015-01-29 2014-12-31 13F GALLAGHER ARTHUR J COM 363576109 0 -16,994 -100.00 0 -100.00
2014-11-14 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 16,994 153 0.91 771 -1.78 0.1147
2014-08-11 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 16,841 1,974 13.28 785 11.03 0.1185
2014-05-12 2014-03-31 13F GALLAGHER ARTHUR J COM 363576109 14,867 -95 -0.63 707 0.71 0.1218
2014-02-13 2013-12-31 13F GALLAGHER ARTHUR J COM 363576109 14,962 3,861 34.78 702 44.74 0.1193
2013-11-14 2013-09-30 13F GALLAGHER ARTHUR J COM 363576109 11,101 11,101 485 0.1558
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.