Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionDaiwa Securities Group Inc.
Latest Disclosed Ownership43,906 shares
Latest Disclosed Value $ 9,509,161
Daiwa Securities Group Inc. reports 25.13% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 13, 2026 - Daiwa Securities Group Inc. filed a 13F-HR form disclosing ownership of 43,906 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $9,509,161 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 58,643 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -25.13% 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 43,906 -14,737 -25.13 9,509 63,293.33 0.0160
2026-02-10 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 58,643 1,402 2.45 15 -11.76 0.0485
2025-11-14 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 57,241 2,257 4.10 18 0.00 0.0598
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 54,984 1,597 2.99 18 -5.56 0.0650
2025-05-13 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 53,387 6,877 14.79 18 38.46 0.0779
2025-02-07 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 46,510 -1,400 -2.92 13 0.00 0.0590
2024-11-12 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 47,910 2,539 5.60 13 18.18 0.0623
2024-08-07 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 45,371 3,002 7.09 12 10.00 0.0626
2024-05-02 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 42,369 -9,043 -17.59 11 -9.09 0.0598
2024-01-31 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 51,412 3,219 6.68 12 10.00 0.0719
2023-11-01 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 48,193 -4,536 -8.60 11 -9.09 0.0783
2023-07-31 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 52,729 2,988 6.01 12 22.22 0.0766
2023-05-02 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 49,741 -10,836 -17.89 10 -18.18 0.0662
2023-02-06 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 60,577 -1,104 -1.79 11 -99.90 0.0877
2022-11-02 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 61,681 1,091 1.80 10,561 6.90 0.0877
2022-08-09 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 60,590 4,084 7.23 9,879 0.13 0.0755
2022-04-29 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 56,506 29,004 105.46 9,866 111.44 0.0456
2022-02-03 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 27,502 -6,176 -18.34 4,666 -6.79 0.0274
2021-11-05 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 33,678 -9,622 -22.22 5,006 -17.46 0.0329
2021-08-06 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 43,300 1,123 2.66 6,065 15.24 0.0409
2021-05-03 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 42,177 -17,626 -29.47 5,263 -28.87 0.0392
2021-02-04 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 59,803 50,681 555.59 7,399 668.33 0.0572
2020-11-02 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 9,122 -79,196 -89.67 963 -85.27 0.0087
2020-08-11 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 88,318 0 0.00 6,536 -9.21 0.1378
2020-05-14 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 88,318 516 0.59 7,199 -13.90 0.0747
2020-01-31 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 87,802 -247 -0.28 8,361 6.02 0.0690
2019-11-04 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 88,049 19,235 27.95 7,886 30.82 0.0668
2019-07-24 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 68,814 61,657 861.49 6,028 978.35 0.0533
2019-04-26 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 7,157 0 0.00 559 6.07 0.0049
2019-02-05 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 7,157 350 5.14 527 3.94 0.0051
2018-11-01 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,807 610 9.84 507 25.19 0.0042
2018-07-30 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 6,197 0 0.00 405 -4.93 0.0032
2018-05-02 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 6,197 847 15.83 426 25.66 0.0034
2018-02-06 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 5,350 65 1.23 339 4.31 0.0024
2017-11-02 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 5,285 35 0.67 325 7.97 0.0022
2017-07-28 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 5,250 450 9.38 301 11.07 0.0019
2017-05-02 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,800 0 0.00 271 8.84 0.0017
2017-02-01 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,800 500 11.63 249 13.70 0.0016
2017-01-10 2016-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 4,300 250 6.17 219 13.47 0.0013
2016-11-04 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,300 219
2016-07-25 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,050 350 9.46 193 16.97 0.0012
2016-05-12 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,700 0 0.00 165 9.27 0.0010
2016-02-04 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,700 3,700 151 0.0010
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.