X0306 4 2018-06-07 0 0001409375 ORION ENERGY SYSTEMS, INC. OESX 0001476048 Altschaefl Michael W 2210 WOODLAND DRIVE MANITOWOC WI 54220 1 1 0 0 Chief Executive Officer Common Stock 2018-06-07 4 A 0 130000 0 A 501076 D Common Stock 2018-06-08 4 P 0 25000 0.86 A 526076 D Stock Options (right to buy) 3.81 2010-10-30 2019-10-30 Common Stock 5291 5291 D Stock Options (right to buy) 3.46 2011-05-18 2020-05-18 Common Stock 19912 19912 D Stock Options (right to buy) 4.19 2012-05-23 2021-05-23 Common Stock 22045 22045 D Stock Options (right to buy) 2.03 2013-06-12 2022-06-12 Common Stock 26646 26646 D Stock Options (right to buy) 2.41 2013-12-31 2023-05-28 Common Stock 36568 36568 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 June 7, 2019, 2020 and 2021, respectively. Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted October 30, 2009, vested and became exercisable in three equal installments on October 30, 2010, 2011 and 2012, respectively. Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted May 18, 2010, vested and became exercisable in three equal installments on May 18, 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 23, 2011, vested and became exercisable in three equal installments on May 23, 2012, 2013 and 2014, respectively. Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted June 12, 2012, vested and became exercisable in three equal installments on June 12, 2013, 2014 and 2015, respectively. Grant to reporting person of option to buy shares under the 2004 Stock and Incentive Awards Plan. This option, granted May 28, 2013, vested and became exercisable in three equal installments on December 31, 2013, 2014 and 2015, respectively. /s/ Steven R. Barth, Attorney-in-Fact for Michael W. Altschaefl 2018-06-11