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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionIng Groep Nv
Latest Disclosed Ownership11,671 shares
Latest Disclosed Value $ 2,527,705
Ing Groep Nv reports 1.54% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 11, 2026 - Ing Groep Nv filed a 13F-HR form disclosing ownership of 11,671 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $2,527,705 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 11,853 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -1.54% during the quarter. The current value of the position is $2,363,378 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)
2026-05-11 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 11,671 -182 -1.54 2,528 -17.61 0.0155
2026-02-11 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 11,853 -153 -1.27 3,067 -17.51 0.0185
2025-11-06 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 12,006 -380 -3.07 3,719 -6.23 0.0201
2025-08-06 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 12,386 977 8.56 3,965 0.69 0.0241
2025-05-09 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 11,409 119 1.05 3,939 22.91 0.0273
2025-02-03 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 11,290 247 2.24 3,205 3.12 0.0216
2024-11-06 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 11,043 -15,983 -59.14 3,107 -55.66 0.0181
2024-08-13 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 27,026 -310 -1.13 7,008 2.53 0.0416
2024-05-10 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 27,336 17,133 167.92 6,835 197.95 0.0469
2024-02-08 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,203 148 1.47 2,294 0.13 0.0184
2023-10-27 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 10,055 -3,549 -26.09 2,292 -23.30 0.0202
2023-08-07 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 13,604 7,857 136.71 2,987 171.79 0.0227
2023-05-09 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 5,747 -11,201 -66.09 1,099 -65.60 0.0107
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 16,948 2,882 20.49 3,195 32.68 0.0321
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 14,066 -16,064 -53.32 2,408 -50.98 0.0403
2022-08-08 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 30,130 -2,942 -8.90 4,912 -14.93 0.0568
2022-05-13 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 33,072 -99,981 -75.14 5,774 -74.42 0.0582
2022-02-11 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 133,053 115,695 666.52 22,575 775.00 0.2019
2021-11-02 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 17,358 530 3.15 2,580 9.46 0.0331
2021-08-13 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 16,828 4,001 31.19 2,357 47.31 0.0376
2021-05-12 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 12,827 70 0.55 1,600 1.39 0.0331
2021-02-11 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 12,757 8,519 201.01 1,578 253.02 0.0352
2020-11-12 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,238 4,238 447 0.0184
2020-08-13 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 0 -3,414 -100.00 0 -100.00
2020-05-06 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,414 -9,380 -73.32 278 -77.18 0.0119
2020-02-10 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 12,794 1,181 10.17 1,218 17.12 0.0371
2019-11-08 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 11,613 11,613 1,040 0.0264
2019-05-13 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 0 -38,708 -100.00 0 -100.00
2019-02-13 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 38,708 -592 -1.51 2,853 -2.46 0.0618
2018-11-06 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 39,300 19,783 101.36 2,925 129.59 0.0505
2018-08-10 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 19,517 980 5.29 1,274 0.00 0.0244
2018-05-07 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 18,537 18,537 1,274 0.0231
2018-02-06 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 0 -6,470 -100.00 0 -100.00
2017-11-08 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,470 6,470 398 0.0077
2017-07-25 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 0 -9,109 -100.00 0 -100.00
2017-05-01 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 9,109 -1,142 -11.14 515 -3.01 0.0093
2017-02-06 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,251 3,671 55.79 531 60.42 0.0100
2016-11-14 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,580 333 5.33 331 11.45 0.0040
2016-07-27 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 6,247 6,247 297 0.0040
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.