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Video: Compound Annual Growth Rate (CAGR) Definition
EFOI Historical Price Range
Date Open High Low Close Volume
09/08/2026 $2.89 $3.00 $2.85 $2.85 8.30K
09/09/2026 $2.91 $2.93 $2.84 $2.85 4.40K
09/10/2026 $2.79 $2.92 $2.79 $2.84 8.80K
09/11/2026 $2.80 $2.93 $2.78 $2.81 4.60K
09/14/2026 $2.85 $2.91 $2.74 $2.74 9.30K
About Energy Focus
Energy Focus, Inc. provides sustainable, energy-efficient lighting and controls systems products for the commercial, military maritime and consumer markets. Co.'s commercial products include RedCap emergency battery backup tubular LEDs (TLEDs); EnFocus powerline lighting control platform including dimming (DM) and color tuning (DCT); light-emitting diode (LED) retrofit solutions for existing luminaires, including replacement TLEDs for linear fluorescent lamps, downlights, and retrofit kits for low-bay, high-bay and office applications; and Industrial grade LED Dock lights.
EFOI historical stock prices picture
Energy Focus (EFOI) has the following price history information. Looking back at EFOI historical stock prices for the last five trading days, on September 08, 2026, EFOI opened at $2.89, traded as high as $3.00 and as low as $2.85, and closed at $2.85. Trading volume was a total of 8.30K shares. On September 09, 2026, EFOI opened at $2.91, traded as high as $2.93 and as low as $2.84, and closed at $2.85. Trading volume was a total of 4.40K shares. On September 10, 2026, EFOI opened at $2.79, traded as high as $2.92 and as low as $2.79, and closed at $2.84. Trading volume was a total of 8.80K shares. On September 11, 2026, EFOI opened at $2.80, traded as high as $2.93 and as low as $2.78, and closed at $2.81. Trading volume was a total of 4.60K shares. On September 14, 2026, EFOI opened at $2.85, traded as high as $2.91 and as low as $2.74, and closed at $2.74. Trading volume was a total of 9.30K shares.

EFOI Historical Stock Prices By Date:

EFOI historical cagr picture

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

Growth of $10,000.00
Without Dividends Reinvested
Start date: 09/16/2016
End date: 09/14/2026
Start price/share: $132.65
End price/share: $2.74
Dividends collected/share: $0.00
Total return: -97.93%
Average Annual Total Return: -32.16%
Starting investment: $10,000.00
Ending investment: $206.47
Years: 10.00
EFOI Historical Closing Prices
Date Close
09/08/2026$2.85
09/09/2026$2.85
09/10/2026$2.84
09/11/2026$2.81
09/14/2026$2.74
Industrials Historical Prices
EFOI is categorized under the Industrials sector; below are some other companies in the same sector:

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Also explore: EFOI shares outstanding history

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