Arthur J. Gallagher & Co. (AJG) NYSE

Currency In USD

AJG Historical Return

If you invested $1000 in Arthur J. Gallagher & Co. (AJG) 10 years ago, it would be worth $6,326.38 as of August 22, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $1,936.22, while $1000 invested 1 year ago would be worth $877.06. This corresponds to total returns of 532.64%, 93.62%, -12.29%, respectively, with annualized returns of 20.25%, 14.13%, -12.29%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

AJG Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
August 21, 2026	259.44	263.81	263.81	264.21	257.68	1.15M
August 20, 2026	256.45	259.61	259.61	262.17	255.11	1.34M
August 19, 2026	249.44	257.45	257.45	260.28	249.11	1.54M
August 18, 2026	250.02	248.36	248.36	255.28	248.05	1.24M
August 17, 2026	248.99	247.97	247.97	253.57	246.88	843,978
August 14, 2026	253.16	251.21	251.21	254.39	250	852,501
August 13, 2026	256.35	253.49	253.49	257.12	250	1.01M
August 12, 2026	250	255.46	255.46	256.29	248.11	1.45M
August 11, 2026	248.98	253.51	253.51	256.2	247	1.65M
August 10, 2026	247	252.43	252.43	252.86	245.33	1.21M
August 07, 2026	247.96	248.12	248.12	252.04	246.29	1.08M
August 06, 2026	252.78	251.74	251.74	253.78	247.52	1.26M
August 05, 2026	249.83	251.03	251.03	252.29	247.57	950,928
August 04, 2026	242.84	248.06	248.06	248.83	240.82	1.41M
August 03, 2026	251.21	247.79	247.79	255.98	246.22	1.56M
July 31, 2026	245.93	249.42	249.42	255.73	242.28	1.73M
July 30, 2026	269.99	256.46	256.46	269.99	253.54	1.88M
July 29, 2026	261.59	268.91	268.91	269.8	259.34	1.56M
July 28, 2026	255	265.31	265.31	265.38	254.15	1.53M
July 27, 2026	249.42	253.36	253.36	255.4	248.14	1.11M
July 24, 2026	242.93	247.77	247.77	248.44	241.12	1.25M
July 23, 2026	242.45	242.21	242.21	243.85	240.98	1.33M
July 22, 2026	248.04	242.5	242.5	248.04	241.14	961,668
July 21, 2026	251.97	248.22	248.22	255.5	247.15	1.04M
July 20, 2026	250.93	253.66	253.66	254.76	249.78	879,579
July 17, 2026	257.61	253.9	253.9	261.92	252.3	1.53M
July 16, 2026	250.62	255.93	255.93	256.14	250	1.37M
July 15, 2026	255.61	247.77	247.77	255.61	246.35	1.85M
July 14, 2026	257.23	253.83	253.83	260.19	253.82	1.36M
July 13, 2026	255.97	261.23	261.23	261.27	255.97	1.28M
July 10, 2026	254.9	253.09	253.09	255.5	250.94	1.03M
July 09, 2026	254.15	253.76	253.76	255.22	251.72	1.47M
July 08, 2026	253.38	256.61	256.61	256.87	251.85	1.89M
July 07, 2026	254	254.67	254.67	256.63	252	1.8M
July 06, 2026	251.36	249.77	249.77	251.79	247.88	1.71M
July 02, 2026	240.96	252.44	252.44	252.96	240.31	2.73M
July 01, 2026	230.81	239.67	239.67	244.08	229.63	2.93M
June 30, 2026	226.85	229.57	229.57	230.58	224.49	1.62M
June 29, 2026	226.44	227.12	227.12	227.19	223.26	1.47M
June 26, 2026	220.58	226.01	226.01	226.56	219.67	2.19M
June 25, 2026	219.79	217.86	217.86	222.98	217.81	1.37M
June 24, 2026	217.63	220.76	220.76	221.98	215.13	3.08M
June 23, 2026	213.68	215.78	215.78	217.87	211.99	2.26M
June 22, 2026	213.92	209.08	209.08	216.12	208.08	2.11M
June 18, 2026	216.17	214.06	214.06	216.18	211.29	2.77M
June 17, 2026	216.5	216.09	216.09	224.99	215.62	1.6M
June 16, 2026	217.08	215.9	215.9	217.87	214.2	1.36M
June 15, 2026	217.38	215.74	215.74	218.75	214.49	1.54M
June 12, 2026	220.79	218.69	218.69	222.4	217.22	1.77M
June 11, 2026	221.83	220.9	220.9	223.66	220.58	2.45M
June 10, 2026	219.19	220.14	220.14	225.34	215.89	1.96M
June 09, 2026	214.55	217.05	217.05	219.52	212.56	1.92M
June 08, 2026	213.48	212.52	212.52	215.59	211.5	1.9M
June 05, 2026	212.28	216.14	216.14	216.73	212.09	1.45M
June 04, 2026	207.45	211	211	212.52	206.42	1.64M
June 03, 2026	203.83	202.5	202.5	204.73	199.68	1.61M
June 02, 2026	204.29	205.77	205.77	207.14	200.7	1.49M
June 01, 2026	200.57	206.1	206.1	206.25	200	1.35M
May 29, 2026	201.88	201.11	201.11	203.73	200.3	1.78M
May 28, 2026	202.9	202.65	202.65	206.2	200.04	1.06M