Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionGoldman Sachs Group Inc
Latest Disclosed Ownership1,953,270 shares
Latest Disclosed Value $ 423,039,069
Goldman Sachs Group Inc reports 14.31% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 15, 2026 - Goldman Sachs Group Inc filed a 13F-HR form disclosing ownership of 1,953,270 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $423,039,069 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,708,676 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 14.31% 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)
2026-05-15 2026-03-31 13F GALLAGHER ARTHUR J CMN 363576109 1,953,270 244,594 14.31 423,039 -4.33 0.0114
2026-02-10 2025-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,708,676 306,493 21.86 442,188 1.81 0.0545
2025-11-14 2025-09-30 13F GALLAGHER ARTHUR J CMN 363576109 1,402,183 -91,629 -6.13 434,312 -9.18 0.0531
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J CMN 363576109 1,493,812 35,699 2.45 478,199 -5.01 0.0650
2025-06-27 2025-03-31 13F/A-2 GALLAGHER ARTHUR J CMN 363576109 1,458,113 322,861 28.44 503,399 56.22 0.0815
2025-05-16 2025-03-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 1,458,113 322,861 503,399 0.0815
2025-05-09 2025-03-31 13F GALLAGHER ARTHUR J CMN 363576109 1,458,113 322,861 503,399 0.0152
2025-02-11 2024-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,135,252 -286,885 -20.17 322,241 -19.47 0.0508
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J CMN 363576109 1,422,137 238,153 20.11 400,147 30.33 0.0644
2024-08-13 2024-06-30 13F GALLAGHER ARTHUR J CMN 363576109 1,183,984 -5,531 -0.46 307,019 3.23 0.0519
2024-05-15 2024-03-31 13F GALLAGHER ARTHUR J CMN 363576109 1,189,515 -144,700 -10.85 297,426 -0.87 0.0527
2024-05-14 2023-12-31 13F/A-2 GALLAGHER ARTHUR J CMN 363576109 1,334,215 231,389 20.98 300,038 19.36 0.0553
2024-03-01 2023-12-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 1,334,215 231,389 300,038 0.0142
2024-02-13 2023-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,334,215 231,389 300,038 0.0142
2024-05-15 2023-09-30 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 1,102,826 61,774 5.93 251,367 9.97 0.0535
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J CMN 363576109 1,102,826 61,774 251,367 0.0505
2024-05-14 2023-06-30 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 1,041,052 47,637 4.80 228,584 20.28 0.0490
2023-08-15 2023-06-30 13F GALLAGHER ARTHUR J CMN 363576109 1,041,052 47,637 228,584 0.0460
2024-05-14 2023-03-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 993,415 111,966 12.70 190,050 14.36 0.0437
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J CMN 363576109 993,415 111,966 190,050 0.0406
2024-05-14 2022-12-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 881,449 87,589 11.03 166,188 123,002.22 0.0407
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J CMN 363576109 881,449 87,589 166,188 0.0372
2024-05-14 2022-09-30 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 793,860 26,872 3.50 136 8.00 0.0343
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J CMN 363576109 793,860 26,872 135,925 0.0314
2024-05-14 2022-06-30 13F/A-2 GALLAGHER ARTHUR J CMN 363576109 766,988 126,036 19.66 125 -99.89 0.0312
2022-08-18 2022-06-30 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 766,988 126,036 125,049 0.0283
2022-08-15 2022-06-30 13F GALLAGHER ARTHUR J CMN 363576109 766,988 126,036 125,049 0.0085
2022-05-16 2022-03-31 13F GALLAGHER ARTHUR J CMN 363576109 640,952 33,391 5.50 111,911 8.56 0.0235
2022-02-17 2021-12-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 607,561 3,941 0.65 103,085 14.89 0.0205
2022-02-14 2021-12-31 13F GALLAGHER ARTHUR J CMN 363576109 607,561 3,941 103,085 0.0059
2022-01-20 2021-09-30 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 603,620 -82,995 -12.09 89,728 -6.71 0.0190
2021-11-10 2021-09-30 13F GALLAGHER ARTHUR J CMN 363576109 603,620 -82,995 89,728 0.0055
2021-08-13 2021-06-30 13F GALLAGHER ARTHUR J CMN 363576109 686,615 83,475 13.84 96,182 27.81 0.0215
2021-05-17 2021-03-31 13F GALLAGHER ARTHUR J CMN 363576109 603,140 -67,567 -10.07 75,253 -9.31 0.0190
2021-02-12 2020-12-31 13F GALLAGHER ARTHUR J CMN 363576109 670,707 150,624 28.96 82,974 51.11 0.0214
2020-11-13 2020-09-30 13F GALLAGHER ARTHUR J CMN 363576109 520,083 -231,811 -30.83 54,911 -25.09 0.0156
2020-08-12 2020-06-30 13F GALLAGHER ARTHUR J CMN 363576109 751,894 -87,930 -10.47 73,301 7.08 0.0223
2020-05-15 2020-03-31 13F GALLAGHER ARTHUR J CMN 363576109 839,824 -84,641 -9.16 68,455 -22.24 0.0241
2020-02-14 2019-12-31 13F GALLAGHER ARTHUR J CMN 363576109 924,465 -256,430 -21.71 88,036 -16.77 0.0224
2019-11-14 2019-09-30 13F GALLAGHER ARTHUR J CMN 363576109 1,180,895 -52,781 -4.28 105,774 -2.11 0.0306
2019-08-14 2019-06-30 13F GALLAGHER ARTHUR J CMN 363576109 1,233,676 190,232 18.23 108,058 32.60 0.0311
2019-05-15 2019-03-31 13F GALLAGHER ARTHUR J CMN 363576109 1,043,444 -62,455 -5.65 81,492 -0.01 0.0246
2019-02-14 2018-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,105,899 -207,097 -15.77 81,504 -16.61 0.0260
2018-11-14 2018-09-30 13F GALLAGHER ARTHUR J CMN 363576109 1,312,996 -240,538 -15.48 97,740 -3.62 0.0252
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J CMN 363576109 1,553,534 -230,642 -12.93 101,415 -17.30 0.0274
2018-05-15 2018-03-31 13F GALLAGHER ARTHUR J CMN 363576109 1,784,176 106,706 6.36 122,627 15.52 0.0314
2018-02-14 2017-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,677,470 112,794 7.21 106,151 10.22 0.0254
2017-11-14 2017-09-30 13F GALLAGHER ARTHUR J CMN 363576109 1,564,676 496,790 46.52 96,306 57.52 0.0236
2017-08-14 2017-06-30 13F GALLAGHER ARTHUR J CMN 363576109 1,067,886 -798,798 -42.79 61,138 -42.07 0.0158
2017-05-18 2017-03-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 1,866,684 26,646 1.45 105,542 10.39 0.0286
2017-05-15 2017-03-31 13F GALLAGHER ARTHUR J CMN 363576109 1,866,684 105,542
2017-02-14 2016-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,840,038 -1,049,954 -36.33 95,609 -34.97 0.0270
2016-11-14 2016-09-30 13F GALLAGHER ARTHUR J CMN 363576109 2,889,992 -580,324 -16.72 147,013 -11.00 0.0445
2016-08-15 2016-06-30 13F GALLAGHER ARTHUR J CMN 363576109 3,470,316 -627,441 -15.31 165,187 -9.37 0.0539
2016-05-13 2016-03-31 13F GALLAGHER ARTHUR J CMN 363576109 4,097,757 277,556 7.27 182,269 16.54 0.0599
2016-02-16 2015-12-31 13F GALLAGHER ARTHUR J CMN 363576109 3,820,201 16,915 0.44 156,399 -0.38 0.0491
2015-11-13 2015-09-30 13F GALLAGHER ARTHUR J CMN 363576109 3,803,286 -542,452 -12.48 157,000 -23.62 0.0530
2015-08-14 2015-06-30 13F GALLAGHER ARTHUR J CMN 363576109 4,345,738 -129,257 -2.89 205,553 -1.75 0.0638
2015-05-15 2015-03-31 13F GALLAGHER ARTHUR J CMN 363576109 4,474,995 914,100 25.67 209,206 24.79 0.0673
2015-02-13 2014-12-31 13F GALLAGHER ARTHUR J CMN 363576109 3,560,895 -119,703 -3.25 167,647 0.42 0.0531
2014-11-14 2014-09-30 13F GALLAGHER ARTHUR J CMN 363576109 3,680,598 23,489 0.64 166,952 -2.04 0.0530
2014-08-14 2014-06-30 13F GALLAGHER ARTHUR J CMN 363576109 3,657,109 42,080 1.16 170,421 -0.92 0.0534
2014-05-15 2014-03-31 13F GALLAGHER ARTHUR J CMN 363576109 3,615,029 1,642,904 83.31 172,003 85.84 0.0563
2014-02-14 2013-12-31 13F GALLAGHER ARTHUR J CMN 363576109 1,972,125 1,679,172 573.19 92,552 623.74 0.0304
2013-11-14 2013-09-30 13F GALLAGHER ARTHUR J CMN 363576109 292,953 51,225 21.19 12,788 21.09 0.0047
2013-08-14 2013-06-30 13F GALLAGHER ARTHUR J CMN 363576109 241,728 42,432 21.29 10,561 52.92 0.0041
2013-06-14 2012-12-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 199,296 -118,906 -37.37 6,906 -39.41 0.0029
2013-06-14 2012-09-30 13F/A-2 GALLAGHER ARTHUR J CMN 363576109 318,202 69,636 28.02 11,398 30.76 0.0046
2013-06-14 2012-06-30 13F/A-2 GALLAGHER ARTHUR J CMN 363576109 248,566 14,884 6.37 8,717 4.37 0.0039
2013-06-14 2012-03-31 13F/A-1 GALLAGHER ARTHUR J CMN 363576109 233,682 233,682 8,352 0.0039
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.