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

SecurityAJG / Arthur J. Gallagher & Co.
InstitutionRitholtz Wealth Management
Latest Disclosed Ownership1,697 shares
Latest Disclosed Value $ 367,518
Ritholtz Wealth Management reports 83.13% decrease in ownership of AJG / Arthur J. Gallagher & Co.

On April 20, 2026 - Ritholtz Wealth Management filed a 13F-HR form disclosing ownership of 1,697 shares of Arthur J. Gallagher & Co. (US:AJG) valued at $367,536 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 10,061 shares of Arthur J. Gallagher & Co.. This represents a change in shares of -83.13% during the quarter. The current value of the position is $366,790 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)
2026-04-20 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 1,697 -8,364 -83.13 368 -85.90 0.0064
2026-01-23 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,061 45 0.45 2,604 -16.09 0.0475
2025-10-28 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 10,016 181 1.84 3,102 -1.46 0.0603
2025-07-28 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 9,835 747 8.22 3,148 0.35 0.0695
2025-04-17 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 9,088 514 5.99 3,137 28.94 0.0937
2025-01-15 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 8,574 -212 -2.41 2,434 -1.58 0.0715
2024-10-10 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 8,786 39 0.45 2,472 8.99 0.0745
2024-08-01 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 8,747 -9 -0.10 2,268 3.61 0.0748
2024-04-24 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 8,756 98 1.13 2,189 12.43 0.0755
2024-01-18 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 8,658 110 1.29 1,947 -0.05 0.0755
2023-10-13 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 8,548 51 0.60 1,948 4.45 0.0875
2023-07-17 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 8,497 91 1.08 1,866 15.98 0.0839
2023-04-20 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 8,406 8,406 1,608 0.0802
2023-01-19 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 0 -1,259 -100.00 0 -100.00
2022-10-19 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 1,259 1,259 216 0.0115
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.