Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionCi Investments Inc.
Latest Disclosed Ownership54,053 shares
Latest Disclosed Value $ 11,706,799
Ci Investments Inc. reports 4.34% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 13, 2026 - Ci Investments Inc. filed a 13F-HR form disclosing ownership of 54,053 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $11,706,799 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 51,803 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 4.34% 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)
2026-05-13 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 54,053 2,250 4.34 11,707 -12.68 0.0567
2026-02-12 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 51,803 -106,920 -67.36 13,406 27,259.18 0.0587
2025-11-12 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 158,723 -240,854 -60.28 49 -61.42 0.1787
2025-08-12 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 399,577 -410 -0.10 128 -7.97 0.4799
2025-05-13 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 399,987 93,395 30.46 138 58.62 0.5818
2025-02-12 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 306,592 -29,536 -8.79 87 -7.45 0.3278
2024-11-12 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 336,128 -17,643 -4.99 95 3.30 0.3599
2024-08-12 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 353,771 41,919 13.44 92 18.18 0.3613
2024-05-13 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 311,852 150,303 93.04 78 113.89 0.3095
2024-02-12 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 161,549 -15,831 -8.92 36 -10.00 0.1878
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 177,380 -4,047 -2.23 40 2.56 0.2256
2023-08-11 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 181,427 89,333 97.00 40 129.41 0.2010
2023-05-12 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 92,094 62,097 207.01 18 240.00 0.0886
2023-02-10 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 29,997 1,655 5.84 6 -99.90 0.0286
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 28,342 252 0.90 4,853 5.96 0.0252
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 28,090 -224 -0.79 4,580 -7.36 0.0214
2022-05-12 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 28,314 1,138 4.19 4,944 7.22 0.0182
2022-02-11 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 27,176 -4,036 -12.93 4,611 -0.62 0.0159
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 31,212 -54 -0.17 4,640 5.94 0.0173
2021-08-13 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 31,266 1,442 4.84 4,380 17.71 0.0161
2021-05-13 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 29,824 -100,129 -77.05 3,721 -76.85 0.0157
2021-02-09 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 129,953 127,427 5,044.62 16,076 5,920.97 0.0708
2020-11-09 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,526 1,286 103.71 267 120.66 0.0013
2020-08-07 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 1,240 -15,181 -92.45 121 -90.96 0.0006
2020-08-07 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 16,421 -1,955 -10.64 1,338 -23.54 0.0081
2020-02-11 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 18,376 -3,342 -15.39 1,750 -10.03 0.0089
2019-11-08 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 21,718 21,718 1,945 0.0100
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.