Arthur J. Gallagher & Co.
US ˙ NYSE ˙ US3635761097

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionBessemer Group Inc
Latest Disclosed Ownership15,629 shares
Latest Disclosed Value $ 3,385
Bessemer Group Inc reports 10.13% increase in ownership of AJG / Arthur J. Gallagher & Co.

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 15,629 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $3,384,929 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 14,191 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 10.13% during the quarter. The current value of the position is $3,164,872 USD.

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)
2026-05-06 2026-03-31 13F GALLAGER ARTHUR J SC 363576109 15,629 1,438 10.13 3 0.00 0.0053
2026-02-05 2025-12-31 13F GALLAGER ARTHUR J SC 363576109 14,191 -519,142 -97.34 4 -98.18 0.0056
2025-11-05 2025-09-30 13F GALLAGER ARTHUR J SC 363576109 533,333 -486 -0.09 165 -2.94 0.2526
2025-08-01 2025-06-30 13F GALLAGER ARTHUR J SC 363576109 533,819 -93,100 -14.85 171 -21.30 0.2774
2025-04-23 2025-03-31 13F GALLAGER ARTHUR J SC 363576109 626,919 518 0.08 216 22.03 0.3881
2025-02-13 2024-12-31 13F GALLAGER ARTHUR J SC 363576109 626,401 -224,767 -26.41 178 -25.94 0.2902
2024-11-12 2024-09-30 13F GALLAGER ARTHUR J SC 363576109 851,168 1,353 0.16 239 8.64 0.3945
2024-08-13 2024-06-30 13F GALLAGER ARTHUR J SC 363576109 849,815 -4,722 -0.55 220 3.29 0.3886
2024-08-13 2024-03-31 13F/A-1 GALLAGER ARTHUR J SC 363576109 854,537 -82,704 -8.82 214 1.43 0.3862
2024-05-13 2024-03-31 13F GALLAGER ARTHUR J SC 363576109 854,537 -82,704 214 0.3862
2024-02-09 2023-12-31 13F GALLAGER ARTHUR J SC 363576109 937,241 4,576 0.49 211 -0.94 0.4106
2023-11-13 2023-09-30 13F GALLAGER ARTHUR J SC 363576109 932,665 13,767 1.50 213 5.47 0.4667
2023-08-10 2023-06-30 13F GALLAGER ARTHUR J SC 363576109 918,898 7,414 0.81 202 15.52 0.4281
2023-05-10 2023-03-31 13F GALLAGER ARTHUR J SC 363576109 911,484 5,793 0.64 174 2.35 0.4139
2023-02-13 2022-12-31 13F GALLAGER ARTHUR J SC 363576109 905,691 10,774 1.20 171 -99.89 0.4159
2022-11-09 2022-09-30 13F GALLAGER ARTHUR J SC 363576109 894,917 247,933 38.32 153,226 45.26 0.3999
2022-08-10 2022-06-30 13F GALLAGER ARTHUR J SC 363576109 646,984 645,635 47,860.27 105,484 44,596.61 0.2630
2022-05-12 2022-03-31 13F GALLAGER ARTHUR J SC 363576109 1,349 -106 -7.29 236 -4.45 0.0005
2022-01-27 2021-12-31 13F GALLAGER ARTHUR J SC 363576109 1,455 -788 -35.13 247 -25.83 0.0005
2021-11-12 2021-09-30 13F GALLAGER ARTHUR J SC 363576109 2,243 11 0.49 333 6.39 0.0007
2021-08-06 2021-06-30 13F GALLAGER ARTHUR J SC 363576109 2,232 256 12.96 313 27.24 0.0007
2021-05-13 2021-03-31 13F GALLAGER ARTHUR J SC 363576109 1,976 -304 -13.33 246 -12.77 0.0006
2021-02-09 2020-12-31 13F GALLAGER ARTHUR J SC 363576109 2,280 428 23.11 282 44.62 0.0007
2020-11-12 2020-09-30 13F GALLAGER ARTHUR J SC 363576109 1,852 105 6.01 195 14.04 0.0006
2020-08-05 2020-06-30 13F GALLAGER ARTHUR J SC 363576109 1,747 -684 -28.14 171 -13.64 0.0005
2020-04-30 2020-03-31 13F GALLAGER ARTHUR J SC 363576109 2,431 -432,236 -99.44 198 -99.52 0.0008
2020-02-04 2019-12-31 13F GALLAGER ARTHUR J SC 363576109 434,667 170,743 64.69 41,394 75.09 0.1340
2019-11-07 2019-09-30 13F GALLAGER ARTHUR J SC 363576109 263,924 -69,717 -20.90 23,641 -19.10 0.0844
2019-07-19 2019-06-30 13F GALLAGER ARTHUR J SC 363576109 333,641 1,065 0.32 29,224 12.51 0.0985
2019-05-13 2019-03-31 13F GALLAGER ARTHUR J SC 363576109 332,576 320,364 2,623.35 25,975 2,786.11 0.0997
2019-05-21 2018-12-31 13F/A-1 GALLAGER ARTHUR J SC 363576109 12,212 -76,888 -86.29 900 -86.43 0.0039
2019-02-12 2018-12-31 13F GALLAGER ARTHUR J SC 363576109 12,212 -76,888 900 0.0039
2018-11-06 2018-09-30 13F GALLAGER ARTHUR J SC 363576109 89,100 -1,701 -1.87 6,633 11.91 0.0247
2018-07-25 2018-06-30 13F GALLAGER ARTHUR J SC 363576109 90,801 1,591 1.78 5,927 -3.33 0.0230
2018-05-10 2018-03-31 13F GALLAGER ARTHUR J SC 363576109 89,210 -7,880 -8.12 6,131 -0.21 0.0239
2018-01-30 2017-12-31 13F GALLAGER ARTHUR J SC 363576109 97,090 2,688 2.85 6,144 5.73 0.0238
2017-11-03 2017-09-30 13F GALLAGER ARTHUR J SC 363576109 94,402 1,768 1.91 5,811 9.58 0.0232
2017-07-27 2017-06-30 13F GALLAGER ARTHUR J SC 363576109 92,634 -11,855 -11.35 5,303 -10.24 0.0214
2017-05-12 2017-03-31 13F GALLAGER ARTHUR J SC 363576109 104,489 11,621 12.51 5,908 22.42 0.0246
2017-02-07 2016-12-31 13F GALLAGER ARTHUR J SC 363576109 92,868 273 0.29 4,826 2.46 0.0222
2016-11-10 2016-09-30 13F GALLAGER ARTHUR J SC 363576109 92,595 -42,511 -31.46 4,710 -26.76 0.0237
2016-08-11 2016-06-30 13F GALLAGER ARTHUR J SC 363576109 135,106 -232 -0.17 6,431 6.83 0.0353
2016-05-11 2016-03-31 13F GALLAGER ARTHUR J SC 363576109 135,338 -8,462 -5.88 6,020 2.26 0.0340
2016-02-12 2015-12-31 13F GALLAGER ARTHUR J SC 363576109 143,800 25,579 21.64 5,887 20.61 0.0328
2015-11-16 2015-09-30 13F GALLAGER ARTHUR J SC 363576109 118,221 -5,269 -4.27 4,881 -16.44 0.0279
2015-08-14 2015-06-30 13F GALLAGER ARTHUR J SC 363576109 123,490 415 0.34 5,841 1.51 0.0305
2015-06-18 2015-03-31 13F/A-1 GALLAGER ARTHUR J SC 363576109 123,075 122,151 13,219.81 5,754 12,977.27 0.0292
2015-05-14 2015-03-31 13F GALLAGER ARTHUR J SC 363576109 123,075 5,754
2015-02-17 2014-12-31 13F GALLAGER ARTHUR J SC 363576109 924 924 0.00 44 0.0002
2014-11-13 2014-09-30 13F GALLAGER ARTHUR J SC 363576109 0 -117,228 -100.00 0 -100.00
2014-08-13 2014-06-30 13F GALLAGER ARTHUR J SC 363576109 117,228 0 0.00 5,463 -2.06 0.0336
2014-05-14 2014-03-31 13F GALLAGER ARTHUR J SC 363576109 117,228 91 0.08 5,578 1.47 0.0376
2014-02-18 2013-12-31 13F GALLAGER ARTHUR J SC 363576109 117,137 -40 -0.03 5,497 7.47 0.0394
2013-11-08 2013-09-30 13F GALLAGER ARTHUR J SC 363576109 117,177 117,019 74,062.66 5,115 72,971.43 0.0415
2013-08-14 2013-06-30 13F GALLAGER ARTHUR J SC 363576109 158 158 7 0.0001
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.