亞瑟·J·加拉格爾公司
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionStifel Financial Corp
Latest Disclosed Ownership174,354 shares
Latest Disclosed Value $ 37,763,815
Stifel Financial Corp reports 4.44% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 174,354 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $37,763,815 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 182,454 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -4.44% 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)
2026-05-12 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 174,354 -8,100 -4.44 37,764 -20.03 0.0081
2026-02-13 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 182,454 -2,352 -1.27 47,222 -17.51 0.0425
2025-11-12 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 184,806 -30,969 -14.35 57,248 -17.13 0.0523
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 215,775 30,531 16.48 69,080 8.01 0.0672
2025-05-14 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 185,244 -3,957 -2.09 63,959 19.08 0.0680
2025-02-13 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 189,201 19,793 11.68 53,709 12.67 0.0559
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 169,408 -894 -0.52 47,670 7.94 0.0500
2024-08-13 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 170,302 10,956 6.88 44,164 10.84 0.0497
2024-05-14 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 159,346 29,415 22.64 39,846 36.36 0.0454
2024-02-12 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 129,931 -2,061 -1.56 29,221 -2.88 0.0368
2023-11-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 131,992 -836 -0.63 30,086 3.16 0.0423
2023-08-14 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 132,828 -13,477 -9.21 29,165 4.20 0.0399
2023-05-12 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 146,305 4,220 2.97 27,989 4.48 0.0401
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 142,085 -701 -0.49 26,789 9.57 0.0402
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 142,786 23,148 19.35 24,449 25.34 0.0400
2022-08-15 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 119,638 -844 -0.70 19,506 -7.27 0.0305
2022-05-13 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 120,482 3,347 2.86 21,036 5.84 0.0287
2022-02-14 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 117,135 12,816 12.29 19,875 28.16 0.0263
2021-11-15 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 104,319 5,209 5.26 15,508 11.70 0.0227
2021-08-13 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 99,110 -2,617 -2.57 13,883 9.38 0.0208
2021-05-14 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 101,727 6,694 7.04 12,693 7.96 0.0209
2021-02-12 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 95,033 14,753 18.38 11,757 38.71 0.0210
2020-11-16 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 80,280 3,335 4.33 8,476 13.00 0.0174
2020-08-14 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 76,945 7,156 10.25 7,501 32.18 0.0172
2020-05-14 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 69,789 -43,484 -38.39 5,675 -47.37 0.0157
2020-02-13 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 113,273 12,968 12.93 10,782 20.08 0.0225
2019-11-19 2019-09-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 100,305 24 0.02 8,979 2.30 0.0229
2019-11-13 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 100,383 102 8,986 5,037.1034
2019-08-14 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 100,281 546 0.55 8,777 12.96 0.0226
2019-05-14 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 99,735 -39,256 -28.24 7,770 -24.17 0.0220
2019-02-13 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 138,991 -49,409 -26.23 10,246 -27.00 0.0331
2018-11-13 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 188,400 4,623 2.52 14,035 16.98 0.0402
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 183,777 -14,252 -7.20 11,998 -11.82 0.0368
2018-05-11 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 198,029 14,294 7.78 13,606 16.93 0.0429
2018-02-14 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 183,735 2,841 1.57 11,636 4.46 0.0369
2017-11-13 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 180,894 322 0.18 11,139 7.70 0.0387
2017-08-14 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 180,572 4,770 2.71 10,343 4.02 0.0384
2017-05-10 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 175,802 33,451 23.50 9,943 34.40 0.0385
2017-02-16 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 142,351 -92,698 -39.44 7,398 -37.82 0.0314
2016-11-15 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 235,049 -11,306 -4.59 11,897 1.46 0.0535
2016-08-17 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 246,355 16,659 7.25 11,726 14.78 0.0542
2016-05-16 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 229,696 14,339 6.66 10,216 15.87 0.0544
2016-03-21 2015-12-31 13F/A-2 GALLAGHER ARTHUR J COM 363576109 215,357 66,699 44.87 8,817 43.69 0.0459
2016-02-26 2015-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 779,199 563,842 35,539 0.1858
2016-02-16 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 777,229 44,148
2015-11-16 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 148,658 21,856 17.24 6,136 3.30 0.0345
2015-08-17 2015-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 126,802 12,333 10.77 5,940 11.05 0.0307
2015-08-17 2015-06-30 13F GALLAGHER ARTHUR J COM 363576109 105,172 4,973
2015-05-14 2015-03-31 13F GALLAGHER ARTHUR J COM 363576109 114,469 76,403 200.71 5,349 198.49 0.0293
2015-02-13 2014-12-31 13F GALLAGHER ARTHUR J COM 363576109 38,066 10,506 38.12 1,792 43.36 0.0100
2014-11-13 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 27,560 14,934 118.28 1,250 112.22 0.0110
2014-08-14 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 12,626 2,696 27.15 589 24.79 0.0053
2014-05-15 2014-03-31 13F GALLAGHER ARTHUR J COM 363576109 9,930 9,930 472 0.0045
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.