Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionHeritage Wealth Advisors
Latest Disclosed Ownership2,346 shares
Latest Disclosed Value $ 508,097
Heritage Wealth Advisors reports 64.92% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On May 13, 2026 - Heritage Wealth Advisors filed a 13F-HR form disclosing ownership of 2,346 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $508,097 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 6,687 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -64.92% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F Arthur J Gallagher COM 363576109 2,346 -4,341 -64.92 508 -70.64 0.0199
2026-02-13 2025-12-31 13F Arthur J Gallagher COM 363576109 6,687 5,189 346.40 1,731 273.65 0.0661
2025-11-13 2025-09-30 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 464 -3.34 0.0203
2025-08-11 2025-06-30 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 480 -7.35 0.0228
2025-05-08 2025-03-31 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 517 21.65 0.0262
2025-02-12 2024-12-31 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 425 0.95 0.0211
2024-11-12 2024-09-30 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 421 8.51 0.0198
2024-12-12 2024-06-30 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 388 3.74 0.0175
2024-08-06 2024-06-30 13F Arthur J Gallagher COM 363576109 1,498 0 388 0.0175
2024-12-12 2024-03-31 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 375 11.31 0.0171
2024-05-08 2024-03-31 13F Arthur J Gallagher COM 363576109 1,498 0 375 0.0172
2024-12-12 2023-12-31 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 337 -1.47 0.0168
2024-02-12 2023-12-31 13F Arthur J Gallagher COM 363576109 1,515 17 341 0.0170
2024-12-12 2023-09-30 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 341 3.96 0.0186
2023-11-09 2023-09-30 13F Arthur J Gallagher COM 363576109 1,498 0 341 0.0186
2024-12-12 2023-06-30 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 329 14.69 0.0174
2023-08-09 2023-06-30 13F Arthur J Gallagher COM 363576109 1,498 0 329 0.0174
2023-05-04 2023-03-31 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 287 1.42 0.0160
2024-12-12 2022-12-31 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 282 10.16 0.0164
2023-02-07 2022-12-31 13F Arthur J Gallagher COM 363576109 1,498 0 282 0.0164
2024-12-12 2022-09-30 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 256 0.0186
2022-11-10 2022-09-30 13F Arthur J Gallagher COM 363576109 1,498 0 0 0.0186
2022-08-04 2022-06-30 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 0 0.0170
2022-05-11 2022-03-31 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 0 0.0145
2022-03-28 2021-12-31 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 0 -100.00 0.0139
2022-02-02 2021-12-31 13F Arthur J Gallagher COM 363576109 1,498 0 254 0.0140
2021-11-02 2021-09-30 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 223 6.22 0.0136
2021-08-09 2021-06-30 13F/A-1 Arthur J Gallagher COM 363576109 1,498 0 0.00 210 12.37 0.0129
2021-07-27 2021-06-30 13F Arthur J Gallagher COM 363576109 1,498 0 185 0.0116
2021-04-27 2021-03-31 13F Arthur J Gallagher COM 363576109 1,498 0 0.00 187 0.54 0.0113
2021-02-01 2020-12-31 13F Arthur J Gallagher COM 363576109 1,498 22 1.49 185 19.35 0.0116
2020-11-03 2020-09-30 13F Arthur J Gallagher COM 363576109 1,476 0 0.00 156 8.39 0.0201
2020-07-17 2020-06-30 13F/A-1 Arthur J Gallagher COM 363576109 1,476 0 0.00 144 19.17 0.0201
2020-07-17 2020-06-30 13F Arthur J Gallagher COM 363576109 19,024 17,548 143 20,011.3351
2020-05-05 2020-03-31 13F Arthur J Gallagher COM 363576109 1,476 0 0.00 120 -14.29 0.0216
2020-02-04 2019-12-31 13F Arthur J Gallagher COM 363576109 1,476 -95 -6.05 141 0.00 0.0186
2019-10-30 2019-09-30 13F Arthur J Gallagher COM 363576109 1,571 0 0.00 140 2.19 0.0206
2019-08-05 2019-06-30 13F Arthur J Gallagher COM 363576109 1,571 0 0.00 138 12.30 0.0211
2019-05-06 2019-03-31 13F Arthur J Gallagher COM 363576109 1,571 95 6.44 123 12.96 0.0202
2019-01-26 2018-12-31 13F Arthur J Gallagher COM 363576109 1,476 0 0.00 108 -0.92 0.0211
2018-11-14 2018-09-30 13F Arthur J Gallagher COM 363576109 1,476 1,476 109 0.0213
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.