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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionColdstream Capital Management Inc
Latest Disclosed Ownership14,087 shares
Latest Disclosed Value $ 3,051,012
Coldstream Capital Management Inc reports 3.86% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 8, 2026 - Coldstream Capital Management Inc filed a 13F-HR form disclosing ownership of 14,087 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $3,050,962 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 13,563 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 3.86% during the quarter. The current value of the position is $2,852,618 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 14,087 524 3.86 3,051 -13.08 0.0328
2026-02-09 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 13,563 -329 -2.37 3,510 -18.41 0.0452
2025-11-19 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 13,892 172 1.25 4,303 -2.05 0.0580
2025-08-12 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 13,720 563 4.28 4,392 -3.30 0.0718
2025-05-13 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 13,157 -696 -5.02 4,542 15.51 0.0967
2025-02-14 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 13,853 303 2.24 3,932 3.04 0.0838
2024-11-18 2024-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 13,550 875 6.90 3,816 16.13 0.0825
2024-11-18 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 13,550 3,816
2024-08-07 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 12,675 202 1.62 3,287 5.39 0.0801
2024-05-14 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 12,473 2,116 20.43 3,119 33.88 0.0792
2024-02-09 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,357 776 8.10 2,329 6.69 0.0652
2023-11-02 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 9,581 -2,395 -20.00 2,184 -16.96 0.0713
2023-08-03 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 11,976 -44 -0.37 2,630 14.35 0.0833
2023-05-15 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 12,020 119 1.00 2,300 2.50 0.0772
2023-01-10 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 11,901 287 2.47 2,244 18.43 0.0821
2022-08-08 2022-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 11,614 609 5.53 1,894 -1.46 0.0738
2022-08-08 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 10,628 -377 1,733 0.0737
2022-05-11 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 11,005 -5,416 -32.98 1,922 -31.01 0.0662
2022-02-11 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 16,421 7,808 90.65 2,786 206.49 0.0875
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 8,613 -12,038 -58.29 909 -68.58 0.0441
2021-08-16 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 20,651 10,719 107.92 2,893 133.49 0.1165
2021-06-16 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 9,932 69 0.70 1,239 1.56 0.0726
2021-02-16 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 9,863 1,825 22.70 1,220 43.87 0.0736
2020-11-16 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 8,038 8,038 848 0.0706
2019-05-10 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 0 -4,087 -100.00 0 -100.00
2019-02-26 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,087 -9 -0.22 302 -0.98 0.0293
2018-11-14 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,096 236 6.11 305 21.03 0.0276
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,860 -145 -3.62 252 -8.70 0.0255
2018-05-15 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,005 -188 -4.48 276 4.15 0.0298
2018-02-14 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,193 597 16.60 265 19.91 0.0287
2017-11-15 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,596 66 1.87 221 9.41 0.0257
2017-08-14 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,530 3,530 202 0.0261
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.