Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionCibc World Markets Corp
Latest Disclosed Ownership35,709 shares
Latest Disclosed Value $ 9,241,132
Cibc World Markets Corp reports 10.85% increase in ownership of AJG / Arthur J. Gallagher & Co.

On February 12, 2026 - Cibc World Markets Corp filed a 13F-HR form disclosing ownership of 35,709 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $9,241,132 USD as of December 31, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 32,214 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 10.85% during the quarter.

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)
2026-02-12 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 35,709 3,495 10.85 9,241 -10.39 0.0445
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 32,214 1,740 5.71 10,312 -1.98 0.0647
2025-05-13 2025-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 30,474 -8,935 -22.67 10,521 -5.95 0.0828
2025-02-10 2024-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 39,409 -2,991 -7.05 11,186 -6.24 0.0655
2024-11-13 2024-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 42,400 565 1.35 11,930 9.97 0.0860
2024-08-12 2024-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 41,835 -13,208 -24.00 10,848 -21.17 0.0711
2024-05-13 2024-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 55,043 4,984 9.96 13,763 22.25 0.0902
2024-02-13 2023-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 50,059 15,447 44.63 11,257 42.69 0.0614
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 34,612 -9,078 -20.78 7,889 -17.76 0.0773
2023-08-04 2023-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 43,690 15,829 56.81 9,593 79.98 0.0779
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 27,861 -41,822 -60.02 5,330 -59.43 0.0870
2023-02-09 2022-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 69,683 34,948 100.61 13,138 120.92 0.0884
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 34,735 -12,568 -26.57 5,947 -22.89 0.0826
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 47,303 -1,609 -3.29 7,712 -9.70 0.0725
2022-05-13 2022-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 48,912 4,246 9.51 8,540 12.69 0.0667
2022-02-11 2021-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 44,666 -9,953 -18.22 7,578 -6.66 0.0403
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 54,619 2,428 4.65 8,119 11.05 0.0552
2021-08-10 2021-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 52,191 -3,347 -6.03 7,311 5.51 0.0509
2021-05-07 2021-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 55,538 -21,753 -28.14 6,929 -27.54 0.0432
2021-02-12 2020-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 77,291 10,025 14.90 9,562 34.64 0.0481
2020-11-12 2020-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 67,266 7,161 11.91 7,102 21.19 0.0692
2020-08-12 2020-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 60,105 8,406 16.26 5,860 39.06 0.0629
2020-05-12 2020-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 51,699 29,644 134.41 4,214 100.67 0.0538
2020-02-13 2019-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 22,055 864 4.08 2,100 10.64 0.0136
2019-11-12 2019-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 21,191 -26,803 -55.85 1,898 -54.85 0.0177
2019-08-13 2019-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 47,994 23,620 96.91 4,204 120.80 0.0324
2019-05-14 2019-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 24,374 -26,466 -52.06 1,904 -49.19 0.0156
2019-02-13 2018-12-31 13F/A-1 GALLAGHER ARTHUR J & CO COM COM 363576109 50,840 26,774 111.25 3,747 109.21 0.0349
2019-02-13 2018-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 50,840 26,774 3,747
2018-11-13 2018-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 24,066 -1,681 -6.53 1,791 6.54 0.0153
2018-08-13 2018-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 25,747 2,228 9.47 1,681 4.02 0.0145
2018-05-11 2018-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 23,519 -13,081 -35.74 1,616 -30.22 0.0172
2018-02-13 2017-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 36,600 10,354 39.45 2,316 43.41 0.0166
2017-11-14 2017-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 26,246 -124,108 -82.54 1,615 -81.24 0.0155
2017-08-11 2017-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 150,354 131,692 705.67 8,608 715.92 0.0911
2017-05-10 2017-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 18,662 6,463 52.98 1,055 66.40 0.0086
2017-02-13 2016-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 12,199 12,199 634 0.0065
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.