X0306 4 2018-02-26 0 0001409375 ORION ENERGY SYSTEMS, INC. OESX 0001281526 RICHSTONE ELLEN B 2210 WOODLAND DRIVE MANITOWOC WI 54220 1 0 0 0 Common Stock 2018-02-26 4 P 0 23500 0.856 A 52848 D The price in Column 4 is a weighted average price. The prices actually paid ranged from $0.84 to $0.8675. 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 purchased at each price within the range for all transactions reported in this Form 4 utilizing a weighted average price. /s/ Steven R. Barth, Attorney-in-Fact for Ellen B. Richstone 2018-02-27