Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionNorges Bank
Latest Disclosed Ownership7,438,704 shares
Latest Disclosed Value $ 1,925,062,208
Norges Bank ownership in AJG / Arthur J. Gallagher & Co.

On February 10, 2026 - Norges Bank filed a 13F-HR form disclosing ownership of 7,438,704 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $1,925,062,208 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 0 shares of Arthur J. Gallagher & Co..

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)
2026-02-10 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 7,438,704 7,438,704 1,925,062 0.2059
2025-11-13 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 0 -4,798,919 -100.00 0 -100.00
2025-08-13 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,798,919 90,540 1.92 1,536,230 -5.49 0.1918
2026-05-11 2025-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 4,708,379 -299,869 -5.99 1,625,521 14.35 0.2282
2025-02-12 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 5,008,248 -173,088 -3.34 1,421,591 -2.49 0.1865
2025-11-12 2024-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 5,181,336 -620,409 -10.69 1,457,873 -3.10 0.2036
2024-08-14 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 5,801,745 120,004 2.11 1,504,450 5.90 0.2248
2025-05-14 2024-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 5,681,741 -136,100 -2.34 1,420,663 8.59 0.2242
2024-02-09 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 5,817,841 -956,090 -14.11 1,308,316 -15.26 0.2286
2024-11-13 2023-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 6,773,931 -569,589 -7.76 1,543,982 -4.24 0.3133
2024-08-14 2023-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 7,343,520 -1,036,995 -12.37 1,612,417 0.57 0.3182
2024-05-15 2023-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 8,380,515 786,434 10.36 1,603,276 11.98 0.3509
2023-02-14 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 7,594,081 -33,217 -0.44 1,431,788 9.64 0.3451
2023-11-13 2022-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 7,627,298 -374,515 -4.68 1,305,946 0.10 0.3472
2023-08-14 2022-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 8,001,813 344,011 4.49 1,304,616 -2.43 0.3373
2023-05-12 2022-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 7,657,802 746,262 10.80 1,337,052 14.02 0.2914
2022-03-09 2021-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 6,911,540 1,960,964 39.61 1,172,681 59.35 0.2411
2022-11-14 2021-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 4,950,576 1,561,050 46.06 735,903 54.99 0.1628
2022-08-15 2021-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 3,389,526 1,480,002 77.51 474,805 99.29 0.1029
2022-05-09 2021-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 1,909,524 -22,879 -1.18 238,251 -0.34 0.0545
2021-03-02 2020-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 1,932,403 89,380 4.85 239,058 22.85 0.0558
2021-11-12 2020-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 1,843,023 91,941 5.25 194,586 13.98 0.0517
2021-08-13 2020-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 1,751,082 -67,243 -3.70 170,713 15.18 0.0491
2021-05-07 2020-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 1,818,325 45,776 2.58 148,212 -12.20 0.0528
2020-03-03 2019-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 1,772,549 0 0.00 168,800 6.32 0.0471
2020-11-13 2019-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,772,549 -15,428 -0.86 158,768 1.38 0.0486
2020-08-13 2019-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,787,977 68,527 3.99 156,609 16.62 0.0484
2020-05-11 2019-03-31 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,719,450 64,251 3.88 134,289 10.08 0.0434
2019-03-04 2018-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,655,199 72,952 4.61 121,988 3.57 0.0454
2019-12-02 2018-09-30 13F/A-3 ARTHUR J GALLAGHER COM 363576109 1,582,247 93,042 6.25 117,783 21.16 0.0383
2019-12-02 2018-09-30 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,582,247 93,042 117,783 0.0383
2019-11-12 2018-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,582,247 93,042 117,783 0.0383
2019-08-12 2018-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,489,205 -3,624 -0.24 97,215 -5.25 0.0334
2019-05-15 2018-03-31 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,492,829 76,429 5.40 102,602 14.47 0.0371
2018-03-05 2017-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,416,400 21,421 1.54 89,629 4.39 0.0321
2018-11-13 2017-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,394,979 -21,094 -1.49 85,861 5.91 0.0326
2018-07-24 2017-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,416,073 -36,252 -2.50 81,070 -1.27 0.0322
2018-05-11 2017-03-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,452,325 834 0.06 82,115 8.88 0.0337
2017-03-02 2016-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,451,491 0 0.00 75,419 6.94 0.0330
2017-11-13 2016-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,451,491 10,057 0.70 70,523 2.79 0.0333
2017-08-09 2016-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,441,434 6,771 0.47 68,612 7.52 0.0326
2017-05-10 2016-03-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,434,663 0 0.00 63,814 8.65 0.0314
2016-04-18 2015-12-31 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,434,663 47,472 3.42 58,735 2.57 0.0292
2016-03-16 2015-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,434,663 0 58,735 0.0295
2016-11-14 2015-09-30 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,387,191 116,475 9.17 57,263 -4.73 0.0300
2016-08-12 2015-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,270,716 -9,950 -0.78 60,105 0.39 0.0300
2016-05-13 2015-03-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,280,666 65,357 5.38 59,871 4.64 0.0293
2015-03-19 2014-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,215,309 65,020 57,217 0.0292
2016-04-18 2014-12-31 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,215,309 65,020 5.65 57,217 9.66 0.0291
2015-11-12 2014-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,150,289 44,663 4.04 52,177 1.27 0.0283
2015-08-10 2014-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,105,626 120,409 12.22 51,523 9.91 0.0278
2015-05-12 2014-03-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 985,217 21,079 2.19 46,877 3.60 0.0265
2014-03-07 2013-12-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 964,138 0 45,247 0.0277
2014-03-20 2013-12-31 13F/A-2 ARTHUR J GALLAGHER COM 363576109 964,138 0 45,247 0.0266
2014-05-12 2013-12-31 13F/A-3 ARTHUR J GALLAGHER COM 363576109 964,138 0 0.00 45,247 7.52 0.0261
2014-11-14 2013-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 964,138 -77,774 -7.46 42,084 -7.55 0.0246
2014-08-14 2013-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,041,912 0 0.00 45,521 5.76 0.0283
2014-04-04 2013-03-31 13F/A-1 ARTHUR J GALLAGHER COM 363576109 1,041,912 99,362 43,041 0.0285
2014-05-12 2013-03-31 13F/A-2 ARTHUR J GALLAGHER COM 363576109 1,041,912 99,362 10.54 43,041 27.48 0.0279
2013-11-14 2012-09-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 942,550 0 0.00 33,762 0.96 0.0228
2013-08-15 2012-06-30 13F/A-1 ARTHUR J GALLAGHER COM 363576109 942,550 942,550 33,442 0.0268
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.