Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionThomasville National Bank
Latest Disclosed Ownership109,058 shares
Latest Disclosed Value $ 28,223,120
Thomasville National Bank reports 0.66% increase in ownership of AJG / Arthur J. Gallagher & Co.

On January 26, 2026 - Thomasville National Bank filed a 13F-HR form disclosing ownership of 109,058 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $28,223,120 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 10, 2025 disclosing 108,348 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 0.66% 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)
2026-01-26 2025-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 109,058 710 0.66 28,223 -15.90 1.7492
2025-10-10 2025-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 108,348 1,126 1.05 33,560 -2.23 2.1129
2025-07-11 2025-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 107,222 -4,709 -4.21 34,324 -11.18 2.3385
2025-04-16 2025-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 111,931 -7,109 -5.97 38,643 14.37 2.8265
2025-01-13 2024-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 119,040 -33 -0.03 33,790 0.85 2.4293
2024-10-11 2024-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 119,073 -2,749 -2.26 33,504 6.06 2.4822
2024-07-10 2024-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 121,822 -48 -0.04 31,590 3.67 2.5295
2024-04-10 2024-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 121,870 -522 -0.43 30,472 10.71 2.5083
2024-01-11 2023-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 122,392 -2,558 -2.05 27,524 -3.36 2.4415
2023-10-10 2023-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 124,950 -1,115 -0.88 28,480 2.89 2.8021
2023-07-10 2023-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 126,065 -267 -0.21 27,680 14.53 2.6425
2023-04-10 2023-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 126,332 -2,628 -2.04 24,169 100,600.00 2.4922
2023-01-10 2022-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 128,960 -4,361 -3.27 24 -99.89 2.8026
2022-10-03 2022-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 133,321 852 0.64 22,827 5.69 2.7365
2022-07-28 2022-06-30 13F/A-1 GALLAGHER ARTHUR J Common Stock 363576109 132,469 -2,940 -2.17 21,598 -8.65 2.3824
2022-07-11 2022-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 135,109 -300 23,590 2.2794
2022-04-14 2022-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 135,409 -2,087 -1.52 23,642 1.34 2.2681
2022-01-18 2021-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 137,496 -639 -0.46 23,329 13.61 2.2309
2021-10-04 2021-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 138,135 -463 -0.33 20,534 5.76 2.1283
2021-07-02 2021-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 138,598 -19,493 -12.33 19,415 50.67 2.0570
2021-04-01 2021-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 158,091 5,879 3.86 12,886 -31.57 2.4015
2021-01-04 2020-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 152,212 -360 -0.24 18,830 16.90 2.4719
2020-10-01 2020-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 152,572 -5,943 -3.75 16,108 4.24 2.4228
2020-07-01 2020-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 158,515 -1,087 -0.68 15,453 8.09 2.3980
2020-04-02 2020-03-31 13F/A-1 GALLAGHER ARTHUR J Common Stock 363576109 159,602 -870 -0.54 14,296 -6.45 2.3843
2020-04-02 2020-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 159,602 -870 14,296 1,412,500.2717
2020-01-07 2019-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 160,472 870 0.55 15,282 6.90 2.3590
2019-10-02 2019-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 159,602 42 0.03 14,296 2.29 2.3843
2019-07-01 2019-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 159,560 2,216 1.41 13,976 13.74 2.4206
2019-05-16 2019-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 157,344 1,001 0.64 12,288 6.65 2.2671
2019-01-17 2018-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 156,343 -2,991 -1.88 11,522 -2.86 2.3650
2018-10-25 2018-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 159,334 -980 -0.61 11,861 13.33 1.9029
2018-07-11 2018-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 160,314 -6,518 -3.91 10,466 -8.72 1.8027
2018-04-20 2018-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 166,832 586 0.35 11,466 8.99 2.0385
2018-02-05 2017-12-31 13F GALLAGHER ARTHUR J Common Stock 363576109 166,246 198 0.12 10,520 2.94 1.9724
2017-11-14 2017-09-30 13F GALLAGHER ARTHUR J Common Stock 363576109 166,048 4,360 2.70 10,220 10.40 1.6952
2017-07-17 2017-06-30 13F GALLAGHER ARTHUR J Common Stock 363576109 161,688 11,636 7.75 9,257 9.11 1.6930
2017-04-12 2017-03-31 13F GALLAGHER ARTHUR J Common Stock 363576109 150,052 150,052 8,484 1.6880
2016-11-03 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 0 -135,736 -100.00 0 -100.00
2016-07-19 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 135,736 12,156 9.84 6,459 17.54 1.7000
2016-04-14 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 123,580 7,196 6.18 5,495 15.34 1.6582
2016-01-14 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 116,384 4,199 3.74 4,764 2.89 1.6872
2015-10-15 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 112,185 1,698 1.54 4,630 -11.37 1.6898
2015-07-22 2015-06-30 13F GALLAGHER ARTHUR J COM 363576109 110,487 685 0.62 5,224 1.77 1.8036
2015-04-14 2015-03-31 13F GALLAGHER ARTHUR J COM 363576109 109,802 3,750 3.54 5,133 2.82 1.7581
2015-01-15 2014-12-31 13F GALLAGHER ARTHUR J COM 363576109 106,052 3,813 3.73 4,992 7.63 1.7845
2014-10-15 2014-09-30 13F GALLAGHER ARTHUR J COM 363576109 102,239 5,934 6.16 4,638 3.39 1.7720
2014-07-16 2014-06-30 13F GALLAGHER ARTHUR J COM 363576109 96,305 4,309 4.68 4,486 2.51 1.6399
2014-04-09 2014-03-31 13F GALLAGHER ARTHUR J COM 363576109 91,996 2,463 2.75 4,376 4.14 1.8006
2014-02-04 2013-12-31 13F GALLAGHER ARTHUR J COM 363576109 89,533 7,589 9.26 4,202 17.51 1.8504
2013-10-22 2013-09-30 13F GALLAGHER ARTHUR J COM 363576109 81,944 751 0.92 3,576 0.82 1.8604
2013-07-10 2013-06-30 13F GALLAGHER ARTHUR J COM 363576109 81,193 81,193 3,547 2.3332
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.