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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionD.a. Davidson & Co.
Latest Disclosed Ownership3,266 shares
Latest Disclosed Value $ 707,358
D.a. Davidson & Co. reports 4.78% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 5, 2026 - D.a. Davidson & Co. filed a 13F-HR form disclosing ownership of 3,266 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $707,350 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 3,430 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -4.78% during the quarter. The current value of the position is $689,126 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)
2026-05-05 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,266 -164 -4.78 707 -20.29 0.0043
2026-01-29 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,430 500 17.06 888 -2.21 0.0054
2025-10-22 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,930 38 1.31 908 -1.95 0.0058
2025-07-30 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,892 35 1.23 926 -6.19 0.0065
2025-04-28 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,857 -83 -2.82 986 18.23 0.0079
2025-01-31 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,940 95 3.34 835 4.25 0.0068
2024-11-13 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,845 30 1.07 800 9.74 0.0066
2024-08-01 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,815 -119 -4.06 730 -0.55 0.0065
2024-05-13 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,934 35 1.21 734 12.60 0.0066
2024-02-09 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,899 645 28.62 652 26.90 0.0064
2023-11-08 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,254 -1 -0.04 514 3.64 0.0056
2023-08-11 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,255 25 1.12 495 16.20 0.0052
2023-04-25 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,230 105 4.94 427 6.50 0.0048
2023-02-03 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,125 -22 -1.02 401 8.70 0.0047
2022-11-07 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,147 12 0.56 368 5.75 0.0048
2022-07-28 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,135 9 0.42 348 -6.20 0.0044
2022-05-12 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,126 -246 -10.37 371 -7.71 0.0040
2022-01-31 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,372 79 3.45 402 17.89 0.0043
2021-11-15 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,293 43 1.91 341 8.25 0.0040
2021-08-10 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,250 0 0.00 315 12.10 0.0037
2021-05-07 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,250 0 0.00 281 1.08 0.0036
2021-02-10 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 2,250 0 0.00 278 16.81 0.0042
2020-11-02 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,250 -900 -28.57 238 -22.48 0.0041
2020-08-10 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,150 0 0.00 307 18.99 0.0057
2020-05-05 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,150 0 0.00 258 -14.00 0.0050
2020-02-14 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,150 445 16.45 300 23.97 0.0048
2019-11-05 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,705 -250 -8.46 242 -6.56 0.0043
2019-08-13 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,955 -50 -1.66 259 15.63 0.0048
2019-05-13 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,005 -305 -9.21 224 -8.20 0.0039
2019-01-29 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,310 0 0.00 244 -0.81 0.0048
2018-11-13 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,310 0 0.00 246 13.89 0.0044
2018-08-02 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,310 3,310 216 0.0042
2017-11-08 2017-09-30 13F ARTHUR J GALLAGHER COM 363576109 0 -11,941 -100.00 0 -100.00
2017-08-11 2017-06-30 13F ARTHUR J GALLAGHER COM 363576109 11,941 -319 -2.60 683 -1.44 0.0154
2017-05-12 2017-03-31 13F ARTHUR J GALLAGHER COM 363576109 12,260 -4,598 -27.27 693 -20.71 0.0168
2017-02-15 2016-12-31 13F ARTHUR J GALLAGHER COM 363576109 16,858 -14,526 -46.28 874 -45.24 0.0198
2016-11-18 2016-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 31,384 28,977 1,203.86 1,596 1,300.00 0.0397
2016-11-14 2016-09-30 13F ARTHUR J GALLAGHER COM 363576109 31,384 1,596
2016-08-13 2016-06-30 13F ARTHUR J GALLAGHER COM 363576109 2,407 214 9.76 114 17.53 0.0034
2016-05-13 2016-03-31 13F ARTHUR J GALLAGHER COM 363576109 2,193 605 38.10 97 49.23 0.0030
2016-02-12 2015-12-31 13F ARTHUR J GALLAGHER COM 363576109 1,588 283 21.69 65 22.64 0.0021
2015-11-13 2015-09-30 13F ARTHUR J GALLAGHER COM 363576109 1,305 1,135 667.65 53 562.50 0.0019
2015-08-14 2015-06-30 13F ARTHUR J GALLAGHER COM 363576109 170 165 3,300.00 8 0.0003
2014-02-13 2013-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 5 5 0 0.0000
2014-02-12 2013-12-31 13F ARTHUR J GALLAGHER COM 363576109 5 0 0.0000
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.