National Grid Transco (NGG) Stock Chart & Stock Price History $71.82 +1.43 (+2.03%) Closing price 08/1/2025 03:59 PM EasternExtended Trading$71.82 0.00 (-0.01%) As of 08/1/2025 06:04 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 ForecastsChartCompetitorsDividendFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock National Grid Transco Stock Price Performance The National Grid Transco (NGG) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 10.36%, with a year-to-date return of 20.87%. In the past month, the stock has increased 0.22%, reflecting recent market activity. As of the latest close, National Grid Transco traded at $71.82 with a market cap of $70.41 billion and volume of 893,509 shares. Five years ago, the stock traded at $59.68, representing a 20.34% increase over that period. At the time, it had a market cap of $44.01 billion and a volume of 406,407 shares. Receive NGG Stock News and Ratings via EmailSign-up to receive the latest news and ratings for National Grid Transco and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+1.87%1 Month Performance+0.22%3 Month Performance+0.15%Year-To-Date Performance+20.87%1 Year Performance+10.36%5 Year Performance+20.34% NGG Stock Chart for Sunday, August, 3, 2025 NGG Chart by TradingView National Grid Transco 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 Capitalization08/01/2025$70.36$71.82+2.07%$72.05$71.53893,509 shs$70.41 billion07/31/2025$70.20$70.36+0.23%$70.60$69.89710,566 shs$68.98 billion07/30/2025$70.50$70.20-0.42%$70.88$69.85805,005 shs$68.82 billion07/29/2025$70.33$70.50+0.24%$70.55$69.911.14 million shs$69.11 billion07/28/2025$72.11$70.33-2.47%$71.64$70.181.51 million shs$68.95 billion07/25/2025$72.29$72.11-0.24%$72.16$71.71553,504 shs$70.70 billion07/24/2025$72.60$72.29-0.42%$72.63$72.061.22 million shs$70.87 billion07/23/2025$74.28$72.60-2.27%$73.35$72.351.15 million shs$71.17 billion07/22/2025$72.53$74.28+2.42%$74.35$73.181.17 million shs$72.82 billion07/21/2025$71.57$72.53+1.33%$73.03$72.01630,343 shs$71.10 billion Get the Latest News and Ratings for NGG and Related StocksEnter your email address below to receive the latest news and analysts' ratings for National Grid Transco and its competitors with MarketBeat's FREE daily newsletter. 07/18/2025$71.21$71.57+0.51%$72.09$71.46663,737 shs$70.03 billion07/17/2025$70.94$71.21+0.38%$71.40$70.82812,595 shs$69.67 billion07/16/2025$71.01$70.94-0.10%$71.11$70.48923,875 shs$69.41 billion07/15/2025$71.13$71.01-0.16%$71.20$70.31997,921 shs$69.48 billion07/14/2025$70.15$71.13+1.39%$71.46$70.79734,164 shs$69.59 billion07/11/2025$70.62$70.15-0.67%$70.45$69.88940,807 shs$68.64 billion07/10/2025$70.85$70.62-0.32%$70.66$69.66951,102 shs$69.10 billion07/09/2025$70.46$70.85+0.55%$70.96$70.34569,550 shs$69.32 billion07/08/2025$70.85$70.46-0.55%$70.69$69.47678,972 shs$68.94 billion07/07/2025$71.67$70.85-1.14%$71.21$70.70674,670 shs$69.32 billion07/04/2025$71.67$71.67$71.93$71.34808,722 shs$70.12 billion07/03/2025$70.56$71.67+1.57%$71.93$71.34808,722 shs$70.12 billion07/02/2025$74.34$70.56-5.08%$71.75$70.491.46 million shs$69.04 billion Related Companies CEG Stock Price Chart EPD Stock Price Chart VST Stock Price Chart ET Stock Price Chart AEP Stock Price Chart TRP Stock Price Chart EXC Stock Price Chart XEL Stock Price Chart VG Stock Price Chart CQP Stock Price Chart Receive NGG Stock News and Ratings via EmailSign-up to receive the latest news and ratings for National Grid Transco and its competitors with MarketBeat's FREE daily newsletter. 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