아서 J. 갤러거 앤 컴퍼니
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership322,329 shares
Latest Disclosed Value $ 69,810
Natixis Advisors, L.p. reports 2.94% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 322,329 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $69,810 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 313,122 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 2.94% 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 322,329 9,207 2.94 70 -14.81 0.0971
2026-02-10 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 313,122 -22,126 -6.60 81 -21.36 0.1148
2025-11-13 2025-09-30 13F GALLAGHER ARTHUR J & CO COM 363576109 335,248 5,313 1.61 104 -1.90 0.1515
2025-08-13 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 329,935 -56,944 -14.72 106 -21.05 0.1676
2025-05-08 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 386,879 22,422 6.15 134 29.13 0.2468
2025-02-10 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 364,457 12,504 3.55 103 4.04 0.1933
2024-11-06 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 351,953 5,291 1.53 99 11.24 0.1931
2024-08-01 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 346,662 8,581 2.54 90 5.95 0.1954
2024-04-25 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 338,081 -22,672 -6.28 85 3.70 0.1943
2024-02-06 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 360,753 -10,419 -2.81 81 -3.57 0.2136
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 371,172 209,867 130.11 85 140.00 0.2587
2023-08-15 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 161,305 -3,415 -2.07 35 12.90 0.1094
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 164,720 9,217 5.93 32 6.90 0.1084
2023-01-27 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 155,503 -3,389 -2.13 29 -99.89 0.1108
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 158,892 56,253 54.81 27,205 62.57 0.1151
2022-08-12 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 102,639 20,883 25.54 16,734 17.23 0.0736
2022-05-12 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 81,756 -4,972 -5.73 14,275 -2.99 0.0544
2022-02-08 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 86,728 -7,753 -8.21 14,715 4.78 0.0562
2021-11-15 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 94,481 -18,726 -16.54 14,044 -11.44 0.0578
2021-08-12 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 113,207 -11,724 -9.38 15,858 1.75 0.0740
2021-05-05 2021-03-31 13F ARTHUR J GALLAGHER COM 363576109 124,931 1,328 1.07 15,586 1.93 0.0814
2021-02-12 2020-12-31 13F ARTHUR J GALLAGHER COM 363576109 123,603 1,694 1.39 15,291 18.80 0.0881
2020-11-12 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 121,909 7,192 6.27 12,871 15.08 0.0810
2020-08-11 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 114,717 6,666 6.17 11,184 26.99 0.0742
2020-04-27 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 108,051 4,989 4.84 8,807 -10.27 0.0718
2020-02-10 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 103,062 -7,110 -6.45 9,815 -0.54 0.0692
2019-11-12 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 110,172 73 0.07 9,868 2.33 0.0783
2019-08-12 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 110,099 -260 -0.24 9,643 11.88 0.0788
2019-05-15 2019-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 110,359 19,947 22.06 8,619 29.38 0.0755
2019-05-15 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 110,359 19,947 8,619
2019-02-13 2018-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 90,412 31,207 52.71 6,662 51.17 0.0658
2019-02-13 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 90,412 31,207 6,662
2018-11-13 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 59,205 -2,150 -3.50 4,407 10.06 0.0388
2018-08-14 2018-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 61,355 5,386 9.62 4,004 4.08 0.0382
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 61,355 4,004
2018-05-10 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 55,969 -143,989 -72.01 3,847 -69.60 0.0380
2018-02-14 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 199,958 -23,399 -10.48 12,653 -7.96 0.1289
2017-11-14 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 223,357 -2,243 -0.99 13,747 6.44 0.1452
2017-07-27 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 225,600 -30,423 -11.88 12,915 -10.78 0.1398
2017-05-12 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 256,023 9,901 4.02 14,476 13.19 0.1604
2017-02-07 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 246,122 7,861 3.30 12,789 5.51 0.1538
2016-11-04 2016-09-30 13F GALLAGHER ARTHUR J and COM 363576109 238,261 103,364 76.62 12,121 88.77 0.1570
2016-08-01 2016-06-30 13F GALLAGHER ARTHUR J and COM 363576109 134,897 -2,949 -2.14 6,421 4.71 0.0888
2016-05-06 2016-03-31 13F GALLAGHER ARTHUR J and COM 363576109 137,846 10,540 8.28 6,132 17.65 0.0918
2016-02-12 2015-12-31 13F GALLAGHER ARTHUR J and COM 363576109 127,306 13,282 11.65 5,212 10.73 0.0854
2015-11-12 2015-09-30 13F GALLAGHER ARTHUR J and COM 363576109 114,024 9,803 9.41 4,707 -4.50 0.0816
2015-08-14 2015-06-30 13F GALLAGHER ARTHUR J and COM 363576109 104,221 16,509 18.82 4,929 20.22 0.0837
2015-05-15 2015-03-31 13F GALLAGHER ARTHUR J and COM 363576109 87,712 87,712 0.00 4,100 0.0720
2014-11-03 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 0 -7,222 -100.00 0 -100.00
2014-08-13 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 7,222 626 9.49 337 7.32 0.0048
2014-05-13 2014-03-31 13F GALLAGHER ARTHUR J COM 363576109 6,596 202 3.16 314 4.67 0.0048
2014-02-12 2013-12-31 13F GALLAGHER ARTHUR J COM 363576109 6,394 -526 -7.60 300 -0.66 0.0049
2013-10-30 2013-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,920 -185 -2.60 302 -2.58 0.0056
2013-07-19 2013-06-30 13F GALLAGHER ARTHUR J COM 363576109 7,105 7,105 310 0.0062
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.