X0303 4 2009-05-26 0001409375 ORION ENERGY SYSTEMS, INC. OESX 0001418607 Scribante John H 1204 PILGRIM ROAD PLYMOUTH WI 53073 1 Sr. VP of Business Development Common Stock 2009-05-26 4 M 0 33000 2.25 A 33000 D Common Stock 2009-05-26 4 S 0 33000 3.6258 D 0 D Common Stock 2009-05-27 4 M 0 16650 2.5 A 16650 D Common Stock 2009-05-27 4 M 0 14850 2.25 A 31500 D Common Stock 2009-05-27 4 S 0 31500 3.6172 D 0 D Common Stock 2009-05-28 4 M 0 3350 2.5 A 3350 D Common Stock 2009-05-28 4 S 0 3350 3.5173 D 0 D Common Stock 2009-05-26 4 S 0 6000 3.6116 D 27815 I By Garden Villa on 3d LLC Common Stock 2009-05-27 4 S 0 4000 3.5635 D 23815 I By Garden Villa on 3d LLC Stock Options (right to buy) 2.25 2009-05-26 4 M 0 33000 0 D 2014-07-31 Common Stock 33000 39850 D Stock Options (right to buy) 2.25 2009-05-27 4 M 0 14850 0 D 2014-07-31 Common Stock 14850 25000 D Stock Options (right to buy) 2.5 2009-05-27 4 M 0 16650 0 D 2016-06-02 Common Stock 16650 43350 D Stock Options (right to buy) 2.5 2009-05-28 4 M 0 3350 0 D 2016-06-02 Common Stock 3350 40000 D Stock Options (right to buy) 5.35 2018-08-08 Common Stock 21452 21452 D Stock Options (right to buy) 3.78 2019-05-19 Common Stock 11759 11759 D The price in Column 4 is a weighted average price. the prices actually received ranged from $3.55 to $3.70. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. The price in Column 4 is a weighted average price. the prices actually received ranged from $3.60 to $3.66. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. The price in Column 4 is a weighted average price. the prices actually received ranged from $3.50 to $3.60. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. The price in Column 4 is a weighted average price. the prices actually received ranged from $3.52 to $3.69. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. The price in Column 4 is a weighted average price. the prices actually received ranged from $3.50 to $3.65. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing an average weighted price. Grant to reporting person of option to buy shares under the 2003 Stock Option Plan. This option, granted July 31, 2004, vests and becomes exercisable as follows: 10% on August 1, 2004, 30% on March 31, 2006, 50% on March 31, 2007, 70% on March 31, 2008, 90% on March 31, 2009, and 100% on March 31, 2010. Grant to reporting person of option to buy shares under the 2004 Equity Incentive Plan. This option, granted June 2, 2006, vests and becomes exercisable in 20% increments on March 31, 2007, 2008, 2009, 2010 and 2011, respectively. Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted August 8, 2008, vests and becomes exercisable in 20% increments on August 8, 2009, 2010, 2011, 2012 and 2013, respectively. Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted May 19, 2009, vests and becomes exercisable in 20% increments on May 19, 2010, 2011, 2012, 2013 and 2014, respectively. Peter C. Underwood, Attorney-in-Fact 2009-05-28