Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionSignaturefd, Llc
Latest Disclosed Ownership4,718 shares
Latest Disclosed Value $ 1,021,914
Signaturefd, Llc reports 13.14% increase in ownership of AJG / Arthur J. Gallagher & Co.

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 4,718 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $1,021,914 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 4,170 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 13.14% 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)
2026-04-07 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,718 548 13.14 1,022 -5.38 0.0157
2026-01-20 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 4,170 -310 -6.92 1,079 -22.21 0.0165
2025-10-21 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 4,480 120 2.75 1,388 -0.57 0.0219
2025-07-16 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 4,360 162 3.86 1,396 -3.73 0.0238
2025-05-02 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 4,198 331 8.56 1,449 32.09 0.0274
2025-02-10 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,867 64 1.68 1,098 2.52 0.0208
2024-10-21 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,803 -22 -0.58 1,070 7.97 0.0204
2024-07-29 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,825 39 1.03 992 4.76 0.0202
2024-05-03 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,786 319 9.20 947 21.44 0.0200
2024-02-01 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,467 57 1.67 780 0.26 0.0180
2023-11-03 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 3,410 192 5.97 777 10.06 0.0202
2023-08-01 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 3,218 37 1.16 707 16.12 0.0180
2023-04-28 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 3,181 -87 -2.66 609 -1.30 0.0166
2023-01-30 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 3,268 297 10.00 616 21.02 0.0180
2022-11-08 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 2,971 142 5.02 509 10.41 0.0174
2022-08-10 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 2,829 617 27.89 461 19.43 0.0157
2022-05-02 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 2,212 349 18.73 386 22.15 0.0116
2022-01-25 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 1,863 503 36.99 316 56.44 0.0097
2021-10-28 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 1,360 21 1.57 202 7.45 0.0070
2021-07-26 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 1,339 391 41.24 188 59.32 0.0075
2021-04-30 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 948 84 9.72 118 10.28 0.0052
2021-02-11 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 864 -25 -2.81 107 13.83 0.0050
2020-11-03 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 889 -12 -1.33 94 6.82 0.0050
2020-07-30 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 901 -114 -11.23 88 6.02 0.0053
2020-04-23 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 1,015 245 31.82 83 13.70 0.0072
2020-02-05 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 770 61 8.60 73 14.06 0.0054
2019-10-16 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 709 38 5.66 64 8.47 0.0053
2019-07-31 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 671 34 5.34 59 18.00 0.0051
2019-05-09 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 637 22 3.58 50 11.11 0.0043
2019-02-13 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 615 -12 -1.91 45 -4.26 0.0042
2018-11-14 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 627 -71 -10.17 47 2.17 0.0048
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 698 24 3.56 46 0.00 0.0051
2018-05-08 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 674 674 46 0.0054
2017-02-14 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 0 -595 -100.00 0 -100.00
2016-11-14 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 595 195 48.75 30 57.89 0.0044
2016-07-29 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 400 275 220.00 19 216.67 0.0028
2016-05-12 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 125 -94 -42.92 6 -33.33 0.0010
2016-01-22 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 219 125 132.98 9 125.00 0.0017
2015-10-23 2015-09-30 13F GALLAGHER ARTHUR J COM 363576109 94 94 4 0.0009
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.