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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionMacquarie Group Ltd
Latest Disclosed Ownership21,618 shares
Latest Disclosed Value $ 4,682,027
Macquarie Group Ltd reports 36.13% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 15, 2026 - Macquarie Group Ltd filed a 13F-HR form disclosing ownership of 21,618 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $4,682,026 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 33,848 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -36.13% during the quarter. The current value of the position is $4,377,645 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)
2026-05-15 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 21,618 -12,230 -36.13 4,682 -46.55 0.0218
2026-02-13 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 33,848 -88,204 -72.27 8,760 -76.83 0.0383
2025-11-13 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 122,052 1,593 1.32 37,804 -1.96 0.0441
2025-08-14 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 120,459 9,523 8.58 38,561 0.68 0.0473
2025-08-14 2025-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 110,936 -23,592 -17.54 38,299 8.09 0.0475
2025-05-15 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 110,936 -23,592 33,349 0.0272
2025-02-14 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 134,528 4,055 3.11 35,432 -3.49 0.0430
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 130,473 -4,642 -3.44 36,712 4.78 0.0396
2024-08-09 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 135,115 -11,290 -7.71 35,037 -4.24 0.0402
2024-05-14 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 146,405 -37,272 -20.29 36,589 -11.42 0.0415
2024-02-14 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 183,677 31,515 20.71 41,306 19.10 0.0477
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 152,162 -27,649 -15.38 34,682 -12.15 0.0436
2023-10-27 2023-06-30 13F/A-2 GALLAGHER ARTHUR J COM 363576109 179,811 -23,119 -11.39 39,481 1.69 0.0451
2023-10-12 2023-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 179,811 -23,119 39,481 0.0397
2023-08-14 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 179,811 -23,119 39,481 0.0401
2023-06-01 2023-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 202,930 -15,426 -7.06 38,822 -5.70 0.0461
2023-05-15 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 202,930 -15,426 38,822 0.0356
2023-02-21 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 218,356 -6,687 -2.97 41,168 6.84 0.0486
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 225,043 -35,169 -13.52 38,533 -9.17 0.0473
2022-08-17 2022-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 260,212 -53,629 -17.09 42,424 -22.58 0.0476
2022-08-15 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 260,212 -53,629 42,424 0.0152
2022-05-16 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 313,841 -31,434 -9.10 54,796 -6.47 0.0417
2022-02-11 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 345,275 -25,780 -6.95 58,584 6.21 0.0488
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 371,055 10,204 2.83 55,157 9.12 0.0470
2021-08-13 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 360,851 351,819 3,895.25 50,548 4,385.18 0.0415
2021-05-14 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 9,032 190 2.15 1,127 3.02 0.0016
2021-02-16 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 8,842 2,718 44.38 1,094 69.35 0.0016
2020-11-13 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,124 -304 -4.73 646 3.03 0.0011
2020-08-11 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 6,428 2,587 67.35 627 100.32 0.0011
2020-05-15 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,841 -2,360 -38.06 313 -46.95 0.0006
2020-03-18 2019-12-31 13F/A-2 GALLAGHER ARTHUR J COM 363576109 6,201 -200 -3.12 590 2.79 0.0008
2020-02-28 2019-12-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 6,201 0 590 0.0009
2020-02-14 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 6,201 -200 590 740.4000
2019-11-14 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 6,401 -51,330 -88.91 574 -88.65 0.0010
2019-11-06 2019-06-30 13F/A-2 GALLAGHER ARTHUR J COM 363576109 57,731 -3,399 -5.56 5,057 5.93 0.0085
2019-09-24 2019-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 57,731 0 5,057 0.0086
2019-08-14 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 57,731 -3,399 5,057
2019-05-15 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 61,130 -32,145 -34.46 4,774 -30.55 0.0081
2019-02-15 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 93,275 -175,240 -65.26 6,874 -65.61 0.0133
2018-11-15 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 268,515 -36,182 -11.87 19,988 0.49 0.0326
2019-03-21 2018-06-30 13F/A-1 GALLAGHER ARTHUR J COM 363576109 304,697 -77,560 -20.29 19,891 -24.29 0.0343
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 304,697 -77,560 19,891
2018-05-11 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 382,257 -18,481 -4.61 26,272 3.10 0.0479
2018-02-14 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 400,738 -7,798 -1.91 25,481 1.33 0.0451
2017-11-08 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 408,536 54,963 15.55 25,146 24.23 0.0451
2017-08-14 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 353,573 114,697 48.02 20,242 49.87 0.0370
2017-05-15 2017-03-31 13F ARTHUR J GALLAGHER COM 363576109 238,876 -38,765 -13.96 13,506 -6.38 0.0245
2017-03-30 2016-12-31 13F/A-1 Arthur J Gallagher COMMON 363576109 277,641 56,063 25.30 14,427 28.00 0.0276
2017-02-15 2016-12-31 13F ARTHUR J GALLAGHER Common Stock 363576109 277,641 14,427
2016-11-15 2016-09-30 13F ARTHUR J GALLAGHER Common Stock 363576109 221,578 195,400 746.43 11,271 804.57 0.0217
2016-09-14 2016-06-30 13F/A-1 ARTHUR J GALLAGHER Common Stock 363576109 26,178 -1,182 -4.32 1,246 2.38 0.0024
2016-08-15 2016-06-30 13F ARTHUR J GALLAGHER Common Stock 363576109 26,178 1,246
2016-05-16 2016-03-31 13F ARTHUR J GALLAGHER Common Stock 363576109 27,360 800 3.01 1,217 11.96 0.0025
2016-02-16 2015-12-31 13F ARTHUR J GALLAGHER COMMON 363576109 26,560 1,100 4.32 1,087 3.43 0.0022
2015-11-16 2015-09-30 13F ARTHUR J GALLAGHER COMMON 363576109 25,460 0 0.00 1,051 -12.71 0.0023
2015-08-21 2015-06-30 13F/A-1 ARTHUR J GALLAGHER COMMON 363576109 25,460 -1,077 -4.06 1,204 -2.98 0.0024
2015-08-14 2015-06-30 13F ARTHUR J GALLAGHER COMMON 363576109 25,460 1,204
2015-05-18 2015-03-31 13F ARTHUR J GALLAGHER COMMON 363576109 26,537 0 0.00 1,241 -0.64 0.0024
2015-02-17 2014-12-31 13F ARTHUR J GALLAGHER COMMON 363576109 26,537 -1,100 -3.98 1,249 -0.40 0.0026
2014-11-14 2014-09-30 13F ARTHUR J GALLAGHER COMMON 363576109 27,637 1,600 6.15 1,254 3.38 0.0027
2014-08-14 2014-06-30 13F ARTHUR J GALLAGHER COMMON 363576109 26,037 2,500 10.62 1,213 8.30 0.0027
2014-05-15 2014-03-31 13F ARTHUR J GALLAGHER Common 363576109 23,537 0 0.00 1,120 1.36 0.0019
2014-02-14 2013-12-31 13F ARTHUR J GALLAGHER Common Stock 363576109 23,537 -700 -2.89 1,105 4.44 0.0020
2013-11-14 2013-09-30 13F ARTHUR J GALLAGHER Common Stock 363576109 24,237 0 0.00 1,058 -0.09 0.0021
2013-08-16 2013-06-30 13F/A-1 ARTHUR J GALLAGHER COMMON 363576109 24,237 24,237 1,059 0.0023
2013-08-14 2013-06-30 13F ARTHUR J GALLAGHER COMMON 363576109 24,237 1,059 0.0023
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.