Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionAtlantic Union Bankshares Corp
Latest Disclosed Ownership19,446 shares
Latest Disclosed Value $ 4,211,615
Atlantic Union Bankshares Corp reports 0.47% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 12, 2026 - Atlantic Union Bankshares Corp filed a 13F-HR form disclosing ownership of 19,446 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $4,211,615 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 19,538 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -0.47% 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 ARTHUR J. GALLAGHER COM 363576109 19,446 -92 -0.47 4,212 -16.71 0.0306
2026-02-04 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 19,538 -421 -2.11 5,056 -18.21 0.0948
2025-11-04 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 19,959 -383 -1.88 6,182 -5.05 0.1164
2025-08-06 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 20,342 381 1.91 6,512 -5.51 0.1487
2025-05-05 2025-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 19,961 -485 -2.37 6,891 18.75 0.4169
2025-02-07 2024-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 20,446 -529 -2.52 5,804 -1.66 0.3378
2024-11-14 2024-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 20,975 -627 -2.90 5,902 5.36 0.3429
2024-07-24 2024-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 21,602 -1,030 -4.55 5,602 -1.01 0.3492
2024-04-16 2024-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 22,632 -1,664 -6.85 5,659 3.57 0.4768
2024-01-19 2023-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 24,296 -3,146 -11.46 5,464 -12.65 0.5064
2023-10-20 2023-09-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 27,442 -2,391 -8.01 6,255 -4.52 0.6410
2023-07-11 2023-06-30 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 29,833 -5,441 -15.42 6,550 -2.93 0.6531
2023-05-08 2023-03-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 35,274 -3,046 -7.95 6,748 -6.59 0.7021
2023-02-09 2022-12-31 13F GALLAGHER ARTHUR J & CO COM Stock 363576109 38,320 -3,002 -7.26 7,225 2.09 0.7731
2022-10-25 2022-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 41,322 -10,262 -19.89 7,076 -15.87 0.8123
2022-07-21 2022-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 51,584 -1,184 -2.24 8,411 -8.71 0.8599
2022-04-26 2022-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 52,768 -646 -1.21 9,214 1.67 0.8066
2022-01-19 2021-12-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 53,414 -77 -0.14 9,063 13.99 0.7684
2021-10-26 2021-09-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 53,491 -824 -1.52 7,951 4.51 0.7484
2021-07-26 2021-06-30 13F GALLAGHER ARTHUR J & CO COM COM 363576109 54,315 -3,804 -6.55 7,608 4.91 0.7349
2021-05-04 2021-03-31 13F GALLAGHER ARTHUR J & CO COM COM 363576109 58,119 1,574 2.78 7,252 3.67 0.7405
2021-02-01 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 56,545 92 0.16 6,995 17.37 0.7264
2020-10-16 2020-09-30 13F GALLAGHER ARTHUR J & C COM 363576109 56,453 -1,319 -2.28 5,960 5.82 0.6938
2020-07-15 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 57,772 18,870 48.51 5,632 77.61 0.7016
2020-04-10 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 38,902 1,628 4.37 3,171 -10.65 0.4626
2020-01-14 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 37,274 -280 -0.75 3,549 5.53 0.4550
2019-10-17 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 37,554 -1,743 -4.44 3,363 -2.30 0.4501
2019-07-23 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 39,297 1,123 2.94 3,442 15.46 0.4623
2019-04-10 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 38,174 -4,334 -10.20 2,981 -4.85 0.8254
2019-01-14 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 42,508 426 1.01 3,133 0.03 1.0213
2018-10-11 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 42,082 698 1.69 3,132 15.91 0.9447
2018-07-12 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 41,384 1,363 3.41 2,702 -1.75 0.8787
2018-04-11 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 40,021 -540 -1.33 2,750 7.17 0.8506
2018-01-10 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 40,561 -613 -1.49 2,566 1.22 0.7941
2017-10-13 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 41,174 -1,078 -2.55 2,535 4.80 0.8531
2017-07-12 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 42,252 -57 -0.13 2,419 1.09 0.8369
2017-04-10 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 42,309 394 0.94 2,393 9.87 0.8539
2017-01-10 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 41,915 782 1.90 2,178 4.11 0.8099
2016-10-14 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 41,133 94 0.23 2,092 7.06 0.7976
2016-07-14 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 41,039 722 1.79 1,954 8.98 0.7524
2016-04-08 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 40,317 -652 -1.59 1,793 6.85 0.7444
2016-01-11 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 40,969 7,103 20.97 1,678 20.03 0.7364
2015-10-28 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 33,866 211 0.63 1,398 -12.19 0.6490
2015-07-29 2015-06-30 13F GALLAGHER ARTHUR J COM 363576109 33,655 -444 -1.30 1,592 -0.19 0.7526
2015-04-24 2015-03-31 13F GALLAGHER ARTHUR J COM 363576109 34,099 -512 -1.48 1,595 -2.15 0.7343
2015-01-09 2014-12-31 13F GALLAGHER ARTHUR J COM 363576109 34,611 -575 -1.63 1,630 2.13 0.7254
2014-10-24 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 35,186 436 1.25 1,596 -1.48 0.7479
2014-08-05 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 34,750 -1,781 -4.88 1,620 1.63 0.7552
2014-08-05 2014-03-31 13F/A-1 GALLAGHER ARTHUR J COM 363576109 36,531 36,531 1,594 0.7315
2014-05-01 2014-03-31 13F GALLAGHER ARTHUR J COM 363576109 36,531 1,594
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.