National Grid Transco - 20 Year Stock Price History | NGG

The latest closing stock price for National Grid Transco as of March 28, 2025 is 65.57.

  • An investor who bought $1,000 worth of National Grid Transco stock at the IPO in 2005 would have $2,992 today, roughly 3 times their original investment - a 7.17% compound annual growth rate over 20 years.
  • The all-time high National Grid Transco stock closing price was 72.14 on May 16, 2024.
  • The National Grid Transco 52-week high stock price is 73.40, which is 11.9% above the current share price.
  • The National Grid Transco 52-week low stock price is 55.13, which is 15.9% below the current share price.
  • The average National Grid Transco stock price for the last 52 weeks is 63.46.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.

National Grid Transco - 20 Year Stock Price History | NGG

  • An investor who bought $1,000 worth of National Grid Transco stock at the IPO in 2005 would have $2,992 today, roughly 3 times their original investment - a 7.17% compound annual growth rate over 20 years.
  • The all-time high National Grid Transco stock closing price was 72.14 on May 16, 2024.
  • The National Grid Transco 52-week high stock price is 73.40, which is 11.9% above the current share price.
  • The National Grid Transco 52-week low stock price is 55.13, which is 15.9% below the current share price.
  • The average National Grid Transco stock price for the last 52 weeks is 63.46.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.