Lennox International (LII) Stock Chart & Stock Price History $552.26 +7.78 (+1.43%) Closing price 09/15/2025 03:59 PM EasternExtended Trading$551.02 -1.23 (-0.22%) As of 09/15/2025 07:57 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 Lennox International Stock Price Performance The Lennox International (LII) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 8.49%, with a year-to-date return of -9.36%. In the past month, the stock has decreased 6.71%, reflecting recent market activity. As of the latest close, Lennox International traded at $552.26 with a market cap of $19.40 billion and volume of 356,765 shares. Five years ago, the stock traded at $274.12, representing a 101.47% increase over that period. At the time, it had a market cap of $10.49 billion and a volume of 195,396 shares. Receive LII Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Lennox International and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. 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Read our full terms of service and privacy policy. 5 Day Performance-2.92%1 Month Performance-6.71%3 Month Performance+1.72%Year-To-Date Performance-9.36%1 Year Performance-8.49%5 Year Performance+101.47% LII Stock Chart for Tuesday, September, 16, 2025 LII Chart by TradingView Lennox International 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 Capitalization09/15/2025$544.55$552.26+1.42%$559.00$541.87356,765 shs$19.40 billion09/12/2025$568.87$544.55-4.28%$566.28$543.26463,657 shs$19.13 billion09/11/2025$559.18$568.87+1.73%$577.20$560.35465,121 shs$19.98 billion09/10/2025$558.26$559.18+0.17%$568.93$540.78521,017 shs$19.64 billion09/09/2025$579.01$558.26-3.58%$572.55$553.20418,284 shs$19.61 billion09/08/2025$578.15$579.01+0.15%$582.21$572.75277,614 shs$20.33 billion09/05/2025$561.72$578.15+2.93%$580.58$565.93437,900 shs$20.30 billion09/04/2025$544.47$561.72+3.17%$567.16$545.43378,294 shs$19.73 billion09/03/2025$543.30$544.47+0.22%$545.61$537.00332,793 shs$19.12 billion09/02/2025$557.56$543.30-2.56%$554.19$541.19281,647 shs$19.08 billion Get the Latest News and Ratings for LII and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Lennox International and its competitors with MarketBeat's FREE daily newsletter. 09/01/2025$557.56$557.56$564.41$553.13306,387 shs$19.58 billion08/29/2025$559.15$557.56-0.28%$564.41$553.13306,387 shs$19.58 billion08/28/2025$567.06$559.15-1.39%$569.37$556.93297,120 shs$19.64 billion08/27/2025$566.80$567.06+0.04%$571.91$562.60524,277 shs$19.92 billion08/26/2025$570.85$566.80-0.71%$575.26$563.64391,185 shs$19.91 billion08/25/2025$591.18$570.85-3.44%$590.99$570.04398,614 shs$20.05 billion08/22/2025$570.15$591.18+3.69%$597.81$570.77435,601 shs$20.76 billion08/21/2025$589.70$570.15-3.32%$586.01$567.14535,383 shs$20.02 billion08/20/2025$612.38$589.70-3.70%$615.75$588.53747,754 shs$20.71 billion08/19/2025$599.34$612.38+2.18%$616.50$599.17363,768 shs$21.51 billion08/18/2025$591.99$599.34+1.24%$601.34$592.00194,025 shs$21.05 billion08/15/2025$600.29$591.99-1.38%$602.04$591.64237,443 shs$20.79 billion Related Companies Allegion Stock Chart Carrier Global Stock Chart Fortune Brands Innovations Stock Chart Graco Stock Chart ITT Stock Chart Illinois Tool Works Stock Chart Masco Stock Chart Pentair Stock Chart Trane Technologies Stock Chart Watsco Stock Chart Receive LII Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Lennox International and its competitors with MarketBeat's FREE daily newsletter. 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