Arthur J. Gallagher & Co. (AJG) Stock Chart & Stock Price History $312.96 -1.44 (-0.46%) Closing price 03:59 PM EasternExtended Trading$312.90 -0.05 (-0.02%) As of 07:05 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Arthur J. Gallagher & Co. Stock Price Performance The Arthur J. Gallagher & Co. (AJG) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 22.14%, with a year-to-date return of 10.25%. In the past month, the stock has decreased 7.59%, reflecting recent market activity. As of the latest close, Arthur J. Gallagher & Co. traded at $314.29 with a market cap of $80.49 billion and volume of 1.47 million shares. Five years ago, the stock traded at $94.47, representing a 231.28% increase over that period. At the time, it had a market cap of $19.05 billion and a volume of 2.11 million shares. Receive AJG Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Arthur J. Gallagher & Co. and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-4.85%1 Month Performance-7.59%3 Month Performance-4.08%Year-To-Date Performance+10.25%1 Year Performance+22.14%5 Year Performance+231.28% AJG Stock Chart for Wednesday, June, 11, 2025 AJG Chart by TradingView Arthur J. Gallagher & Co. Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization06/11/2025$314.29$312.96-0.42%$315.40$308.981.43 million shs$80.15 billion06/10/2025$317.88$314.29-1.13%$321.24$312.301.47 million shs$80.49 billion06/09/2025$328.90$317.88-3.35%$327.83$312.181.62 million shs$81.41 billion06/06/2025$327.99$328.90+0.28%$330.78$327.27735,202 shs$84.23 billion06/05/2025$336.53$327.99-2.54%$337.33$325.061.85 million shs$84.00 billion06/04/2025$345.61$336.53-2.63%$346.01$336.291.30 million shs$86.19 billion06/03/2025$348.68$345.61-0.88%$351.23$341.761.04 million shs$88.51 billion06/02/2025$347.64$348.68+0.30%$348.90$342.15986,098 shs$89.30 billion05/30/2025$341.54$347.64+1.79%$348.30$341.002.55 million shs$89.03 billion05/29/2025$339.39$341.54+0.63%$342.05$337.59628,804 shs$87.47 billion Get the Latest News and Ratings for AJG and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Arthur J. Gallagher & Co. and its competitors with MarketBeat's FREE daily newsletter. 05/28/2025$342.63$339.39-0.95%$344.04$339.171.14 million shs$86.92 billion05/27/2025$338.38$342.63+1.26%$343.03$337.20976,386 shs$87.75 billion05/26/2025$338.38$338.38$339.41$333.47859,406 shs$86.66 billion05/23/2025$335.21$338.38+0.95%$339.41$333.47859,406 shs$86.66 billion05/22/2025$337.75$335.21-0.75%$339.08$333.65771,640 shs$85.85 billion05/21/2025$340.23$337.75-0.73%$341.89$336.25867,022 shs$86.50 billion05/20/2025$343.59$340.23-0.98%$344.25$339.65908,691 shs$87.13 billion05/19/2025$342.12$343.59+0.43%$344.64$341.67610,927 shs$87.99 billion05/16/2025$338.19$342.12+1.16%$342.85$337.88973,172 shs$87.62 billion05/15/2025$329.79$338.19+2.55%$338.45$330.201.01 million shs$86.61 billion05/14/2025$332.96$329.79-0.95%$334.58$326.06898,453 shs$84.46 billion05/13/2025$331.31$332.96+0.50%$335.39$330.891.00 million shs$85.27 billion05/12/2025$338.67$331.31-2.17%$339.18$325.531.67 million shs$84.85 billion Related Companies MMC Stock Chart AON Stock Chart BRO Stock Chart CRD.B Stock Chart EHTH Stock Chart WTW Stock Chart RYAN Stock Chart ERIE Stock Chart EQH Stock Chart CRVL Stock Chart Receive AJG Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Arthur J. 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