| SC 13G/A | 2016-02-12 | ARIEL INVESTMENTS, LLC | ORION ENERGY SYSTEMS, INC. | - | - | EDGAR |
| SC 13G/A | 2016-01-27 | PVAM Perlus Microcap Fund, L.P. | ORION ENERGY SYSTEMS, INC. | 1,978,895 | 7.2% | EDGAR |
| SC 13G | 2016-01-19 | North Star Investment Management Corp. | ORION ENERGY SYSTEMS, INC. | 2,042,118 | 7.4% | EDGAR |
| SC 13G | 2015-12-23 | PVAM Perlus Microcap Fund, L.P. | ORION ENERGY SYSTEMS, INC. | 1,409,232 | 5.1% | EDGAR |
| SC 13G/A | 2015-02-13 | ARIEL INVESTMENTS, LLC | ORION ENERGY SYSTEMS, INC. | - | - | EDGAR |
| SC 13G/A | 2014-02-14 | ARIEL INVESTMENTS, LLC | ORION ENERGY SYSTEMS, INC. | - | - | EDGAR |
| SC 13G/A | 2013-07-10 | ARIEL INVESTMENTS, LLC | ORION ENERGY SYSTEMS, INC. | - | - | EDGAR |
| SC 13G/A | 2013-02-14 | GE Ventures LLC | ORION ENERGY SYSTEMS, INC. | 1,570,990 | 7.8% | EDGAR |
| SC 13G/A | 2013-02-14 | Verfuerth Neal R | ORION ENERGY SYSTEMS, INC. | 1,298,687 | 6.4% | EDGAR |
| SC 13G/A | 2013-01-10 | ARIEL INVESTMENTS, LLC | ORION ENERGY SYSTEMS, INC. | - | - | EDGAR |
| SC 13G | 2012-02-14 | ARIEL INVESTMENTS, LLC | ORION ENERGY SYSTEMS, INC. | - | - | EDGAR |
| SC 13G/A | 2012-02-06 | Verfuerth Neal R | ORION ENERGY SYSTEMS, INC. | 2,204,665 | 9.6% | EDGAR |
| SC 13G/A | 2011-02-15 | Verfuerth Neal R | ORION ENERGY SYSTEMS, INC. | 2,193,984 | 9.6% | EDGAR |
| SC 13G/A | 2011-02-14 | GE CAPITAL EQUITY INVESTMENTS INC | ORION ENERGY SYSTEMS, INC. | 1,570,990 | 6.9% | EDGAR |
| SC 13G/A | 2010-02-16 | Anchorage Capital Master Offshore, Ltd | ORION ENERGY SYSTEMS, INC. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2010-02-04 | Verfuerth Neal R | ORION ENERGY SYSTEMS, INC. | 3,202,867 | 14.4% | EDGAR |
| SC 13G/A | 2009-02-17 | Verfuerth Neal R | ORION ENERGY SYSTEMS, INC. | 3,156,238 | 13.7% | EDGAR |
| SC 13G/A | 2009-02-17 | Anchorage Capital Master Offshore, Ltd | ORION ENERGY SYSTEMS, INC. | 1,542,903 | 5.8% | EDGAR |
| SC 13G/A | 2009-02-17 | Winslow Management Company, LLC | ORION ENERGY SYSTEMS, INC. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2009-02-11 | GE CAPITAL EQUITY INVESTMENTS INC | ORION ENERGY SYSTEMS, INC. | 1,774,832 | 7.8% | EDGAR |