Arthur J. Gallagher & Co. (AJG) Stock Chart & Stock Price History $335.21 -2.32 (-0.69%) Closing price 03:59 PM EasternExtended Trading$329.90 -5.31 (-1.58%) As of 07:53 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 30.10%, with a year-to-date return of 18.09%. In the past month, the stock has increased 1.25%, reflecting recent market activity. As of the latest close, Arthur J. Gallagher & Co. traded at $337.75 with a market cap of $86.50 billion and volume of 867,022 shares. Five years ago, the stock traded at $91.10, representing a 267.96% increase over that period. At the time, it had a market cap of $17.29 billion and a volume of 896,740 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-2.02%1 Month Performance+1.25%3 Month Performance+3.05%Year-To-Date Performance+18.09%1 Year Performance+30.10%5 Year Performance+267.96% AJG Stock Chart for Thursday, May, 22, 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 Capitalization05/22/2025$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 billion05/09/2025$338.65$338.67+0.01%$339.12$336.08576,336 shs$86.61 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. 05/08/2025$339.61$338.65-0.28%$343.62$338.441.04 million shs$86.61 billion05/07/2025$338.61$339.61+0.30%$341.32$336.901.28 million shs$86.85 billion05/06/2025$335.55$338.61+0.91%$339.23$332.631.40 million shs$86.59 billion05/05/2025$331.42$335.55+1.25%$336.93$326.391.40 million shs$85.81 billion05/02/2025$317.77$331.42+4.30%$332.44$316.871.82 million shs$84.76 billion05/01/2025$320.27$317.77-0.78%$319.63$313.412.00 million shs$81.26 billion04/30/2025$316.59$320.27+1.16%$321.16$312.173.03 million shs$81.90 billion04/29/2025$323.73$316.59-2.21%$321.39$315.072.75 million shs$80.96 billion04/28/2025$322.37$323.73+0.42%$326.07$322.191.54 million shs$82.79 billion04/25/2025$331.96$322.37-2.89%$327.34$313.582.16 million shs$82.44 billion04/24/2025$332.23$331.96-0.08%$332.71$326.33961,110 shs$84.89 billion04/23/2025$331.08$332.23+0.35%$336.69$329.75953,648 shs$84.96 billion04/22/2025$319.52$331.08+3.62%$332.00$322.621.04 million shs$84.67 billion04/21/2025$329.29$319.52-2.97%$329.04$315.71837,088 shs$81.71 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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