BlackRock, Inc. ownership in AJG / Arthur J. Gallagher & Co.

Arthur J. Gallagher & Co.

MX ˙ BMV ˙ US3635761097

Security	MX:AJG / Arthur J. Gallagher & Co.
Institution	BlackRock, Inc.
Latest Disclosed Ownership	17,725,659 shares
Ownership	6.90%

2025-07-16 - BlackRock, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 17,725,659 shares of Arthur J. Gallagher & Co. (MX:AJG). This represents 6.9 percent ownership of the company. In their previous filing dated 2024-01-25 , BlackRock, Inc. had reported owning 17,415,095 shares, indicating an increase of 1.78 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2025-07-16	2025-07-16	13G/A	17,415,095	17,725,659	1.78	6.90	-14.81
2024-01-25	2024-01-25	13G	16,707,293	17,415,095	4.24	8.10	2.53
2023-02-03	2023-02-03	13G/A	16,267,719	16,707,293	2.70	7.90	1.28
2022-02-01	2022-02-01	13G/A	20,229,733	16,267,719	-19.59	7.80	-25.71
2021-01-27	2021-01-27	13G/A	20,241,439	20,229,733	-0.06	10.50	-2.78
2020-02-04	2020-02-04	13G/A	19,674,828	20,241,439	2.88	10.80	0.93
2019-01-10	2019-01-10	13G/A	14,413,622	19,674,828	36.50	10.70	33.75
2018-01-25	2018-01-25	13G/A	14,488,986	14,413,622	-0.52	8.00	-1.23
2017-01-19	2017-01-19	13G/A	16,059,292	14,488,986	-9.78	8.10	-10.99
2016-01-25	2016-01-25	13G/A		16,059,292		9.10
2015-01-23	2015-01-23	13G/A		12,698,653		7.90
2014-01-28	2014-01-28	13G/A		10,736,413		8.20
2013-02-08	2013-02-08	13G/A		9,619,070		7.69
2012-02-13	2012-02-13	13G/A		8,804,891		7.80

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-13	2026-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	19,307,796	68,175	0.35	4,181,683	-16.01	0.0731
2026-02-12	2025-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	19,239,621	675,641	3.64	4,979,022	-13.41	0.0842
2025-11-12	2025-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	18,563,980	-419,087	-2.21	5,750,007	-5.38	0.1007
2025-08-12	2025-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	18,983,067	-1,159,457	-5.76	6,076,860	-12.61	0.1157
2025-05-02	2025-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	20,142,524	632,842	3.24	6,954,005	25.57	0.1461
2025-02-07	2024-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	19,509,682	1,988,814	11.35	5,537,823	12.33	0.1121
2024-11-13	2024-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	17,520,868	293,175	1.70	4,929,847	10.35	0.1035
2024-08-13	2024-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	17,227,693	-51,642	-0.30	4,467,313	3.40	0.1011
2024-05-10	2024-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	17,279,335	-135,975	-0.78	4,320,525	10.32	0.1006
2024-02-13	2023-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	17,415,310	394,550	2.32	3,916,355	0.95	0.0999
2023-11-13	2023-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	17,020,760	554,729	3.37	3,879,542	7.30	0.1116
2023-08-11	2023-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	16,466,031	-179,808	-1.08	3,615,446	13.53	0.0997
2023-05-12	2023-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	16,645,839	-61,838	-0.37	3,184,515	1.09	0.0939
2023-02-13	2022-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	16,707,677	402,237	2.47	3,150,065	12.83	0.0987
2022-11-14	2022-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	16,305,440	3,962	0.02	2,791,819	5.04	0.0950
2022-08-12	2022-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	16,301,478	236,269	1.47	2,657,793	-5.25	0.0853
2022-05-12	2022-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	16,065,209	-202,510	-1.24	2,804,987	1.62	0.0756
2022-02-10	2021-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	16,267,719	-2,937,358	-15.29	2,760,144	-3.32	0.0703
2021-11-09	2021-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	19,205,077	-248,089	-1.28	2,854,838	4.76	0.0799
2021-08-11	2021-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	19,453,166	-210,637	-1.07	2,725,001	11.07	0.0758
2021-05-07	2021-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	19,663,803	-565,930	-2.80	2,453,453	-1.96	0.0721
2021-02-05	2020-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	20,229,733	-756,919	-3.61	2,502,620	12.95	0.0798
2020-11-06	2020-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	20,986,652	120,399	0.58	2,215,773	8.92	0.0818
2020-08-14	2020-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	20,866,253	835,272	4.17	2,034,251	24.59	0.0812
2020-05-01	2020-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	20,030,981	-210,458	-1.04	1,632,725	-15.30	0.0799
2020-02-13	2019-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	20,241,439	353,864	1.78	1,927,592	8.21	0.0739
2019-11-08	2019-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	19,887,575	718,115	3.75	1,781,329	6.09	0.0748
2019-08-22	2019-06-30	13F/A-1	GALLAGHER ARTHUR J	COM	363576109	19,169,460	185,656	0.98	1,679,052	13.25	0.0718
2019-08-13	2019-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	19,169,460	185,656		1,679,052
2019-05-09	2019-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	18,983,804	-691,024	-3.51	1,482,636	2.25	0.0662
2019-02-08	2018-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	19,674,828	3,713,920	23.27	1,450,035	22.04	0.0732
2018-11-09	2018-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	15,960,908	1,255,179	8.54	1,188,127	23.76	0.0514
2018-08-09	2018-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	14,705,729	26,905	0.18	959,990	-4.85	0.0442
2018-05-09	2018-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	14,678,824	265,202	1.84	1,008,875	10.61	0.0482
2018-02-09	2017-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	14,413,622	184,778	1.30	912,092	4.15	0.0434
2017-11-14	2017-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	14,228,844	55,483	0.39	875,784	7.93	0.0442
2017-08-10	2017-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	14,173,361	187,329	1.34	811,425	2.61	0.0430
2017-05-12	2017-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	13,986,032	13,597,930	3,503.70	790,770	3,821.50	0.0434
2017-02-10	2016-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	388,102	8,586	2.26	20,165	4.45	0.0285
2016-11-08	2016-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	379,516	7,257	1.95	19,306	8.94	0.0277
2016-08-10	2016-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	372,259	161,000	76.21	17,721	88.60	0.0267
2016-05-10	2016-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	211,259	16,697	8.58	9,396	17.95	0.0151
2016-02-11	2015-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	194,562	49,883	34.48	7,966	33.39	0.0117
2015-11-13	2015-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	144,679	5,465	3.93	5,972	-9.31	0.0094
2015-08-07	2015-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	139,214	70,648	103.04	6,585	105.40	0.0098
2015-05-13	2015-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	68,566	50,561	280.82	3,206	278.07	0.0044
2015-02-09	2014-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	18,005	1	0.01	848	3.79	0.0012
2014-10-29	2014-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	18,004	-5,012	-21.78	817	-23.86	0.0012
2014-08-06	2014-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	23,016	-71,444	-75.63	1,073	-76.13	0.0016
2014-05-02	2014-03-31	13F	GALLAGHER ARTHUR J	COM	363576109	94,460	-23,040	-19.61	4,495	-18.48	0.0073
2014-02-12	2013-12-31	13F	GALLAGHER ARTHUR J	COM	363576109	117,500	7,466	6.79	5,514	14.83	0.0090
2013-11-12	2013-09-30	13F	GALLAGHER ARTHUR J	COM	363576109	110,034	88,456	409.94	4,802	409.77	0.0091
2013-08-13	2013-06-30	13F	GALLAGHER ARTHUR J	COM	363576109	21,578	21,578		942		0.0019

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.