Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership12,368 shares
Latest Disclosed Value $ 2,678,741
Neuberger Berman Group LLC reports 0.23% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 12,368 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $2,678,741 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,397 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -0.23% 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)
2026-05-14 2026-03-31 13F ARTHUR J GALLAGHER Common 363576109 12,368 -29 -0.23 2,679 -16.52 0.0010
2026-02-13 2025-12-31 13F ARTHUR J GALLAGHER Common 363576109 12,397 -317 -2.49 3,208 -18.54 0.0024
2025-11-12 2025-09-30 13F ARTHUR J GALLAGHER Common 363576109 12,714 -61,290 -82.82 3,938 -83.38 0.0029
2025-08-25 2025-06-30 13F/A-1 ARTHUR J GALLAGHER Common 363576109 74,004 -90,392 -54.98 23,690 -58.26 0.0182
2025-08-13 2025-06-30 13F ARTHUR J GALLAGHER Common 363576109 74,004 -90,392 23,690 0.0094
2025-05-13 2025-03-31 13F ARTHUR J GALLAGHER Common 363576109 164,396 153,722 1,440.15 56,756 1,773.72 0.0475
2025-02-13 2024-12-31 13F ARTHUR J GALLAGHER Common 363576109 10,674 59 0.56 3,030 1.44 0.0024
2024-11-14 2024-09-30 13F ARTHUR J GALLAGHER Common 363576109 10,615 100 0.95 2,987 9.54 0.0023
2024-11-14 2024-06-30 13F/A-1 ARTHUR J GALLAGHER Common 363576109 10,515 -68,146 -86.63 2,727 -86.14 0.0022
2024-08-13 2024-06-30 13F ARTHUR J GALLAGHER Common 363576109 10,515 -68,146 2,727 0.0022
2024-11-14 2024-03-31 13F/A-1 ARTHUR J GALLAGHER Common 363576109 78,661 -22,780 -22.46 19,668 -13.78 0.0163
2024-05-13 2024-03-31 13F ARTHUR J GALLAGHER Common 363576109 78,661 -22,780 19,668 0.0163
2024-11-14 2023-12-31 13F/A-2 ARTHUR J GALLAGHER Common 363576109 101,441 -126,397 -55.48 22,812 -56.07 0.0199
2024-02-09 2023-12-31 13F ARTHUR J GALLAGHER Common 363576109 101,441 -126,397 22,812 0.0199
2023-11-14 2023-09-30 13F ARTHUR J GALLAGHER Common 363576109 227,838 396 0.17 51,931 3.99 0.0473
2023-08-11 2023-06-30 13F ARTHUR J GALLAGHER Common 363576109 227,442 23,987 11.79 49,939 28.31 0.0447
2023-05-12 2023-03-31 13F ARTHUR J GALLAGHER Common 363576109 203,455 95,542 88.54 38,923 91.31 0.0361
2023-02-13 2022-12-31 13F ARTHUR J GALLAGHER Common 363576109 107,913 100,801 1,417.34 20,346 1,567.62 0.0199
2022-11-15 2022-09-30 13F ARTHUR J GALLAGHER Common 363576109 7,112 477 7.19 1,220 12.75 0.0013
2022-08-15 2022-06-30 13F ARTHUR J GALLAGHER Common 363576109 6,635 20 0.30 1,082 -6.32 0.0011
2022-05-23 2022-03-31 13F/A-1 ARTHUR J GALLAGHER Common 363576109 6,615 1,248 23.25 1,155 55.87 0.0010
2022-05-13 2022-03-31 13F ARTHUR J GALLAGHER Common 363576109 6,615 1,248 951 0.0004
2022-02-11 2021-12-31 13F ARTHUR J GALLAGHER Common 363576109 5,367 2,038 61.22 741 111.11 0.0006
2021-11-12 2021-09-30 13F ARTHUR J GALLAGHER Common 363576109 3,329 -6,881 -67.39 351 -72.90 0.0003
2021-08-13 2021-06-30 13F ARTHUR J GALLAGHER Common 363576109 10,210 948 10.24 1,295 19.35 0.0011
2021-05-13 2021-03-31 13F ARTHUR J GALLAGHER Common 363576109 9,262 315 3.52 1,085 1.31 0.0010
2021-02-10 2020-12-31 13F ARTHUR J GALLAGHER Common 363576109 8,947 -2,615 -22.62 1,071 -11.71 0.0011
2020-11-12 2020-09-30 13F ARTHUR J GALLAGHER Common 363576109 11,562 -85,244 -88.06 1,213 -87.14 0.0014
2020-08-13 2020-06-30 13F ARTHUR J GALLAGHER Common 363576109 96,806 6,956 7.74 9,434 28.81 0.0117
2020-05-14 2020-03-31 13F ARTHUR J GALLAGHER Common 363576109 89,850 87,510 3,739.74 7,324 3,184.30 0.0112
2020-02-12 2019-12-31 13F ARTHUR J GALLAGHER Common 363576109 2,340 -434 -15.65 223 -10.44 0.0003
2019-11-13 2019-09-30 13F ARTHUR J GALLAGHER Common 363576109 2,774 -286 -9.35 249 -7.43 0.0003
2019-08-13 2019-06-30 13F ARTHUR J GALLAGHER Common 363576109 3,060 3,060 269 0.0003
2016-01-28 2015-12-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 0 0 0 0.0000
2015-11-10 2015-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 0 -5,800 -100.00 0 -100.00
2015-07-31 2015-06-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 5,800 -26,300 -81.93 274 -81.75 0.0003
2015-05-06 2015-03-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 32,100 32,100 1,501 0.0016
2015-02-05 2014-12-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 0 -35,010 -100.00 0 -100.00
2014-11-04 2014-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 35,010 -100 -0.28 1,588 -2.93 0.0016
2014-08-05 2014-06-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 35,110 -2,458 -6.54 1,636 -8.45 0.0016
2014-05-05 2014-03-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 37,568 -6,172 -14.11 1,787 -12.96 0.0018
2014-02-11 2013-12-31 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 43,740 -3,405 -7.22 2,053 -0.24 0.0021
2013-10-29 2013-09-30 13F/A-1 GALLAGHER ARTHUR J COMMON STOCK 363576109 47,145 -988 -2.05 2,058 -2.14 0.0023
2013-10-29 2013-09-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 11,946 427
2013-08-13 2013-06-30 13F GALLAGHER ARTHUR J COMMON STOCK 363576109 48,133 48,133 2,103 0.0025
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.