X0609 4 2026-08-11 0001409375 ORION ENERGY SYSTEMS, INC. OESX 0001281526 RICHSTONE ELLEN B false 2210 WOODLAND DRIVE MANITOWOC WI 54220 true false false false false Common Stock 2026-08-11 4 A false 2532 0 A 35897 D Restricted stock granted to the reporting person under the Orion Energy Systems, Inc. 2016 Omnibus Incentive Plan. The restricted stock vests and becomes exercisable with respect to 1/3 of the restricted stock on each of August 11, 2027, 2028 and 2029, respectively. On August 22, 2025, the issuer effected a 1-for-10 reverse stock split of the issued and outstanding shares of its common stock. Upon effectiveness of the reverse stock split, every 10 shares of common stock was automatically converted into one share of common stock, resulting in the reporting person's beneficial ownership of 300,293 less shares of common stock held directly. /s/ Garrett F. Bishop, Attorney-in-Fact for Ellen B. Richstone 2026-08-12