Historical Stock Price
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Video: Compound Annual Growth Rate (CAGR) Definition
Date Open High Low Close Volume
09/04/2026 $111.29 $119.25 $111.29 $119.02 3.40M
09/08/2026 $120.93 $121.68 $118.51 $119.64 2.57M
09/09/2026 $118.55 $118.93 $114.59 $115.37 2.84M
09/10/2026 $114.36 $114.96 $111.47 $111.65 3.53M
09/11/2026 $113.59 $114.99 $112.17 $113.46 1.55M
NRG Energy, Inc. is an energy and home services company. Co.'s businesses are the sale of electricity and natural gas to residential, commercial and industrial and wholesale customers, supported by its wholesale electric generation, as well as the sale of smart home products and services. Across the U.S. and Canada, the Co. delivers sustainable solutions, predominately under the brand names such as NRG, Reliant, Direct Energy, Green Mountain Energy and Vivint. Co.'s segments include Texas, East, West/Services/Other, Vivint Smart Home and Corporate activities.
NRG historical stock prices picture
NRG Energy (NRG) has the following price history information. Looking back at NRG historical stock prices for the last five trading days, on September 04, 2026, NRG opened at $111.29, traded as high as $119.25 and as low as $111.29, and closed at $119.02. Trading volume was a total of 3.40M shares. On September 08, 2026, NRG opened at $120.93, traded as high as $121.68 and as low as $118.51, and closed at $119.64. Trading volume was a total of 2.57M shares. On September 09, 2026, NRG opened at $118.55, traded as high as $118.93 and as low as $114.59, and closed at $115.37. Trading volume was a total of 2.84M shares. On September 10, 2026, NRG opened at $114.36, traded as high as $114.96 and as low as $111.47, and closed at $111.65. Trading volume was a total of 3.53M shares. On September 11, 2026, NRG opened at $113.59, traded as high as $114.99 and as low as $112.17, and closed at $113.46. Trading volume was a total of 1.55M shares.

NRG Historical Stock Prices By Date:

NRG historical cagr picture

Below, we examine the compound annual growth rate — CAGR for short — of an investment into NRG Energy shares, starting with a $10,000 purchase of NRG, and working forward through the historical stock price information to today.

Growth of $10,000.00
With Dividends Reinvested

Start date: 09/15/2016
End date: 09/11/2026
Start price/share: $11.15
End price/share: $113.46
Starting shares: 896.86
Ending shares: 1,102.83
Dividends reinvested/share: $10.62
Total return: 1,151.27%
Average Annual Total Return: 28.76%
Starting investment: $10,000.00
Ending investment: $125,085.84
Years: 9.99
 
Growth of $10,000.00
Without Dividends Reinvested

Start date: 09/15/2016
End date: 09/11/2026
Start price/share: $11.15
End price/share: $113.46
Dividends collected/share: $10.62
Total return: 1,012.82%
Average Annual Total Return: 27.26%
Starting investment: $10,000.00
Ending investment: $111,261.66
Years: 9.99
Date Close
09/04/2026$119.02
09/08/2026$119.64
09/09/2026$115.37
09/10/2026$111.65
09/11/2026$113.46
NRG is categorized under the Utilities sector; below are some other companies in the same sector:

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Also explore: NRG shares outstanding history

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