Compare Stocks Compare stocks with our powerful stock comparison tool. Analyze fundamentals, price performance, and key financial indicators to make informed investment decisions. Our tool lets you compare up to ten stocks side by side based on Performance Charts, Price & Volume, MarketRank™, Analyst Ratings, Sales & Book Value, Profitability & Earnings, Dividends, Debt, Ownership, Headlines, and more. Simply enter up to ten stock symbols (e.g., BAC, JPM, WFC, C, GS) to get started and uncover top investment opportunities. Stocks to Compare Sections All Sections Selected Performance Chart Price & Volume MarketRank Analyst Ratings Sales & Book Value Profitability & Earnings Dividends Debt Ownership Miscellaneous Headlines About Compare NYSE:AJGNYSE:AMTNYSE:AONNYSE:MMC On This Page Performance ChartPrice & VolumeMarketRank™Analyst RatingsSales & Book ValueProfitability & EarningsDividendsDebtOwnershipMiscellaneousHeadlinesAbout Comparison Ideas Stock Ideas Comparative Price Performance Over Time1 day7 days30 days90 days365 daysCompare Price & VolumeCompanyCurrent Price50-Day Moving Average52-Week RangeMarket CapBetaAvg. VolumeToday's VolumeAJGArthur J. Gallagher & Co.$324.31+1.3%$330.50$251.42▼$351.23$81.99B0.741.35 million shs1.31 million shsAMTAmerican Tower$221.71+1.9%$215.73$172.51▼$243.56$101.81B0.812.48 million shs2.62 million shsAONAON$360.17+1.5%$359.37$285.35▼$412.97$76.59B0.861.15 million shs1.18 million shsMMCMarsh & McLennan Companies$219.13+1.4%$224.76$207.21▼$248.00$106.53B0.831.95 million shs1.96 million shs10 Stocks Set to Soar in Summer 2025Enter your email address and we'll send you MarketBeat's list of ten stocks that are set to soar in Summer 2025, despite the threat of tariffs and other economic uncertainty. These ten stocks are incredibly resilient and are likely to thrive in any economic environment.Get This Free ReportCompare Price PerformanceCompany1-Day Performance7-Day Performance30-Day Performance90-Day Performance1-Year PerformanceAJGArthur J. Gallagher & Co.+1.08%+2.54%-4.16%-3.92%+22.57%AMTAmerican Tower+2.06%+3.12%+4.64%+5.86%+13.79%AONAON+1.51%+2.94%+0.84%-9.06%+21.08%MMCMarsh & McLennan Companies+1.26%+1.22%-4.52%-7.45%+2.21%Compare MarketRank™CompanyOverall ScoreAnalyst's OpinionShort Interest ScoreDividend StrengthESG ScoreNews and Social Media SentimentCompany OwnershipEarnings & ValuationAJGArthur J. Gallagher & Co.4.5514 of 5 stars2.15.03.33.03.22.51.3AMTAmerican Tower4.0587 of 5 stars2.65.01.73.13.11.70.0AONAON4.2992 of 5 stars3.24.01.72.32.11.71.3MMCMarsh & McLennan Companies4.7403 of 5 stars3.13.04.23.23.02.51.3Compare Analyst ForecastsCompanyConsensus Rating ScoreConsensus RatingConsensus Price Target% Upside from Current PriceAJGArthur J. Gallagher & Co. 2.21Hold$319.29-1.55% DownsideAMTAmerican Tower 3.11Buy$240.258.36% UpsideAONAON 2.43Hold$397.2710.30% UpsideMMCMarsh & McLennan Companies 2.21Hold$241.9310.40% UpsideCurrent Analyst Ratings BreakdownLatest MMC, AON, AJG, and AMT Analyst RatingsDateCompanyBrokerageActionRatingPrice TargetDetails6/9/2025AJGArthur J. Gallagher & Co.Wells Fargo & CompanySubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetOverweight ➝ Overweight$372.00 ➝ $371.006/5/2025AJGArthur J. Gallagher & Co.Keefe, Bruyette & WoodsSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetMarket Perform ➝ Market Perform$315.00 ➝ $326.005/19/2025AMTAmerican TowerBank of AmericaSubscribe to MarketBeat All Access for the recommendation accuracy ratingInitiated CoverageBuy$255.005/13/2025AONAONThe Goldman Sachs GroupSubscribe to MarketBeat All Access for the recommendation accuracy ratingUpgradeNeutral ➝ Buy$408.00 ➝ $408.005/2/2025AJGArthur J. Gallagher & Co.Keefe, Bruyette & WoodsSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetMarket Perform ➝ Market Perform$307.00 ➝ $315.005/1/2025AMTAmerican TowerRoyal Bank Of CanadaSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetOutperform ➝ Outperform$240.00 ➝ $250.004/30/2025AMTAmerican TowerWells Fargo & CompanySubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetOverweight ➝ Overweight$230.00 ➝ $240.004/30/2025AMTAmerican TowerScotiabankSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetSector Outperform ➝ Sector Outperform$234.00 ➝ $248.004/30/2025AMTAmerican TowerJMP SecuritiesSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetMarket Outperform ➝ Market Outperform$248.00 ➝ $260.004/30/2025AMTAmerican TowerRaymond James FinancialSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetStrong-Buy ➝ Strong-Buy$231.00 ➝ $251.004/30/2025AMTAmerican TowerUBS GroupSubscribe to MarketBeat All Access for the recommendation accuracy ratingBoost Price TargetBuy ➝ Buy$245.00 ➝ $250.00(Data available from 6/24/2022 forward. View 10+ years of historical ratings with our analyst ratings screener.)Compare Sales & Book ValueCompanyAnnual RevenuePrice/SalesCashflowPrice/CashBook ValuePrice/BookAJGArthur J. Gallagher & Co.$11.40B7.29$12.66 per share25.62$80.78 per share4.01AMTAmerican Tower$10.18B10.20$11.81 per share18.78$20.64 per share10.74AONAON$15.70B4.95$18.79 per share19.17$29.15 per share12.36MMCMarsh & McLennan Companies$24.46B4.41$10.56 per share20.76$27.56 per share7.95Compare Profitability & EarningsCompanyNet IncomeEPSTrailing P/E RatioForward P/E RatioP/E GrowthNet MarginsReturn on Equity (ROE)Return on Assets (ROA)Next Earnings DateAJGArthur J. Gallagher & Co.$1.46B$6.9146.9324.46N/A14.39%14.83%3.80%7/24/2025 (Estimated)AMTAmerican Tower$2.26B$3.8957.0022.171.6117.34%30.20%4.82%7/29/2025 (Estimated)AONAON$2.65B$11.7430.6818.602.1215.58%52.71%6.82%7/25/2025 (Estimated)MMCMarsh & McLennan Companies$4.06B$8.1626.8520.912.6516.13%32.19%8.39%7/17/2025 (Estimated)Latest MMC, AON, AJG, and AMT EarningsDateQuarterCompanyConsensus EstimateReported EPSBeat/MissGap EPSRevenue EstimateActual RevenueDetails7/17/2025Q2 2025MMCMarsh & McLennan Companies$2.67N/AN/AN/A$6.92 billionN/A5/1/2025Q1 2025AJGArthur J. Gallagher & Co.$3.57$3.67+$0.10$3.13$3.85 billion$3.69 billion4/29/2025Q1 2025AMTAmerican Tower$2.41$2.75+$0.34$2.75$2.54 billion$2.56 billion4/25/2025Q1 2025AONAON$6.04$5.67-$0.37$4.43$4.83 billion$4.73 billion4/17/2025Q1 2025MMCMarsh & McLennan Companies$3.02$3.06+$0.04$2.79$7.08 billion$6.70 billionCompare DividendsCompanyAnnual PayoutDividend Yield3-Year Dividend GrowthPayout RatioYears of Consecutive GrowthAJGArthur J. Gallagher & Co.$2.600.80%N/A37.63%15 YearsAMTAmerican Tower$6.803.07%N/A174.81%1 YearsAONAON$2.980.83%N/A25.38%N/AMMCMarsh & McLennan Companies$3.261.49%N/A39.95%15 YearsLatest MMC, AON, AJG, and AMT DividendsAnnouncementCompanyPeriodAmountYieldEx-Dividend DateRecord DatePayable Date5/15/2025AMTAmerican Towerquarterly$1.703.21%6/13/20256/13/20257/11/20254/30/2025AJGArthur J. Gallagher & Co.quarterly$0.650.81%6/6/20256/6/20256/20/20254/11/2025AONAONquarterly$0.74500.79%5/1/20255/1/20255/15/2025(Data available from 1/1/2013 forward)Compare DebtCompanyDebt-to-Equity RatioCurrent RatioQuick RatioAJGArthur J. Gallagher & Co.0.561.441.44AMTAmerican Tower3.430.810.81AONAON2.261.731.73MMCMarsh & McLennan Companies1.321.141.14Compare OwnershipInstitutional OwnershipCompanyInstitutional OwnershipAJGArthur J. Gallagher & Co.85.53%AMTAmerican Tower92.69%AONAON86.14%MMCMarsh & McLennan Companies87.99%Insider OwnershipCompanyInsider OwnershipAJGArthur J. Gallagher & Co.1.30%AMTAmerican Tower0.17%AONAON1.10%MMCMarsh & McLennan Companies0.35%Compare Miscellaneous StatsCompanyEmployeesShares OutstandingFree FloatOptionableAJGArthur J. Gallagher & Co.56,000256.10 million252.77 millionOptionableAMTAmerican Tower4,691468.14 million467.30 millionOptionableAONAON60,000215.94 million213.57 millionOptionableMMCMarsh & McLennan Companies90,000492.73 million491.00 millionOptionableMMC, AON, AJG, and AMT HeadlinesRecent News About These CompaniesMarsh & McLennan Companies, Inc. (NYSE:MMC) Shares Sold by Sava Infond d.o.o.June 24 at 6:21 AM | marketbeat.comAsset Management One Co. Ltd. Acquires 12,592 Shares of Marsh & McLennan Companies, Inc. (NYSE:MMC)June 24 at 5:21 AM | marketbeat.comMarsh & McLennan (NYSE:MMC) Sees Stake Added by Kingswood S&P 500June 23 at 10:14 PM | kalkinemedia.comMarsh & McLennan Companies, Inc. (NYSE:MMC) Holdings Boosted by Oppenheimer Asset Management Inc.June 23 at 7:19 AM | marketbeat.comSawgrass Asset Management LLC Cuts Stock Holdings in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 23 at 6:15 AM | marketbeat.comCoho Partners Ltd. Has $66.83 Million Stock Position in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 22 at 6:37 AM | marketbeat.comKentucky Retirement Systems Insurance Trust Fund Reduces Position in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 22 at 6:20 AM | marketbeat.comMinichMacGregor Wealth Management LLC Sells 13,661 Shares of Marsh & McLennan Companies, Inc. (NYSE:MMC)June 22 at 5:47 AM | marketbeat.comRunning Oak Capital LLC Raises Stock Position in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 22 at 5:06 AM | marketbeat.comWealth Enhancement Advisory Services LLC Grows Stock Holdings in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 22 at 3:21 AM | marketbeat.comDupont Capital Management Corp Increases Stake in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 21 at 5:40 AM | marketbeat.comEnvestnet Portfolio Solutions Inc. Trims Stake in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 21 at 4:23 AM | marketbeat.comORG Wealth Partners LLC Invests $334,000 in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 20, 2025 | marketbeat.comRobertson Stephens Wealth Management LLC Invests $355,000 in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 20, 2025 | marketbeat.comHere's How Much $100 Invested In Marsh & McLennan Cos 15 Years Ago Would Be Worth TodayJune 19, 2025 | benzinga.comCatalina Capital Group LLC Cuts Position in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 19, 2025 | marketbeat.comBoston Trust Walden Corp Sells 5,566 Shares of Marsh & McLennan Companies, Inc. (NYSE:MMC)June 19, 2025 | marketbeat.comInscription Capital LLC Takes Position in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 19, 2025 | marketbeat.comSowell Financial Services LLC Takes Position in Marsh & McLennan Companies, Inc. (NYSE:MMC)June 19, 2025 | marketbeat.comMarsh & McLennan Companies Inc (MMC) to Announce Q2 Financial Results | MMC stock newsJune 18, 2025 | gurufocus.comMarsh McLennan to Host Second Quarter Earnings Investor Call on July 17June 18, 2025 | businesswire.comNew MarketBeat Followers Over TimeMedia Sentiment Over TimeMMC, AON, AJG, and AMT Company DescriptionsArthur J. Gallagher & Co. NYSE:AJG$324.31 +4.15 (+1.30%) Closing price 06/23/2025 03:59 PM EasternExtended Trading$323.48 -0.83 (-0.26%) As of 07:01 AM 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.Arthur J. Gallagher & Co. engages in the provision of insurance brokerage, reinsurance brokerage, consulting, and third-party claims settlement and administration services. It operates through the following segments: Brokerage, Risk Management, and Corporate. The Brokerage segment consists of retail and wholesale insurance brokerage operations. The Risk Management segment provides contract claim settlement and administration services. The Corporate segment manages clean energy and other investments. The company was founded by Arthur J. Gallagher in 1927 and is headquartered in Rolling Meadows, IL.American Tower NYSE:AMT$221.71 +4.23 (+1.95%) Closing price 06/23/2025 03:59 PM EasternExtended Trading$222.32 +0.60 (+0.27%) As of 06:51 AM 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.American Tower, one of the largest global REITs, is a leading independent owner, operator and developer of multitenant communications real estate with a portfolio of over 224,000 communications sites and a highly interconnected footprint of U.S. data center facilities.AON NYSE:AON$360.17 +5.47 (+1.54%) Closing price 06/23/2025 03:59 PM EasternExtended Trading$346.77 -13.40 (-3.72%) As of 07:04 AM 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.Aon Plc engages in the provision of risk, health, and wealth solutions. It focuses on risk capital including claim management, reinsurance, risk analysis, management, retention, and transfer; and human capital involving analytics, health and benefits, investments, pensions and retirement, talent and rewards, and workplace wellbeing. The company was founded in 1982 and is headquartered in Dublin, Ireland.Marsh & McLennan Companies NYSE:MMC$219.13 +2.92 (+1.35%) Closing price 06/23/2025 03:59 PM EasternExtended Trading$220.86 +1.73 (+0.79%) As of 04:00 AM 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.Marsh & McLennan Cos., Inc. is a professional services firm, which engages in offering clients advice and solutions in risk, strategy, and people. It operates through the Risk and Insurance Services, and Consulting segments. The Risk and Insurance Services segment is involved in risk management activities, as well as insurance and reinsurance broking and services. The Consulting segment offers health, wealth, and career solutions and products, and specialized management, strategic, economic, and brand consulting services. The company was founded by Henry W. Marsh and Donald R. McLennan in 1871 and is headquartered in New York, NY. 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