| 2.38 Data as of May 24 |  -0.03 / -1.24%Today’s Change | 1.12 Today|||52-Week Range 3.09 | +43.37% Year-to-Date |
| Mutual fund holders | 6.78% |
| Individual stakeholders | 35.70% |
| Other institutional | 23.07% |
| 3/31/2013 | ARIEL INVESTMENTS LLC Bought 344.8 Thousand shares of Orion Energy Systems Inc |
| 3/31/2013 | BLACKROCK FUND ADVISORS Bought 59.4 Thousand shares of Orion Energy Systems Inc |
| 3/31/2013 | BRIDGEWAY CAPITAL MANAGEMENT, IN... Bought 42.0 Thousand shares of Orion Energy Systems Inc |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Ariel Investments LLC | 11.87% | 2,392,197 | 5,765,195 | +344,804 | +16.84% |
| North Star Investment Management ... | 3.12% | 628,378 | 1,514,391 | +17,903 | +2.93% |
| Perkins Capital Management, Inc. | 3.03% | 609,581 | 1,469,090 | -66,000 | -9.77% |
| The Vanguard Group, Inc. | 2.85% | 574,089 | 1,383,554 | +200 | +0.03% |
| Dimensional Fund Advisors, Inc. | 2.53% | 508,819 | 1,226,254 | +20,249 | +4.14% |
| Penbrook Management LLC | 0.85% | 171,130 | 412,423 | -13,700 | -7.41% |
| BlackRock Fund Advisors | 0.71% | 142,711 | 343,934 | +59,400 | +71.30% |
| Renaissance Technologies LLC | 0.56% | 112,700 | 271,607 | +9,500 | +9.21% |
| WHV Investment Management, Inc. | 0.51% | 101,700 | 245,097 | +23,000 | +29.22% |
| Royce & Associates LLC | 0.50% | 100,000 | 241,000 | 0 | 0.00% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index... | 2.17% | 437,525 | 1,054,435 | 0 | 0.00% |
| Ariel Discovery Fund | 0.73% | 146,434 | 352,906 | +28,400 | +24.06% |
| Royce Micro Cap Trust | 0.50% | 100,000 | 241,000 | 0 | 0.00% |
| Vanguard Extended Market Index Fu... | 0.47% | 95,335 | 229,757 | +200 | +0.21% |
| Fidelity Spartan Extended Market ... | 0.32% | 65,072 | 156,824 | 0 | 0.00% |
| DFA US Small Cap Portfolio | 0.30% | 59,525 | 143,455 | 0 | 0.00% |
| DFA US Small Cap Value Portfolio | 0.26% | 51,318 | 123,676 | 0 | 0.00% |
| DFA Tax Managed US Small Cap Port... | 0.25% | 49,736 | 119,864 | 0 | 0.00% |
| DFA US Targeted Value Portfolio | 0.24% | 48,800 | 117,608 | 0 | 0.00% |
| iShares Russell Micro Cap Index F... | 0.19% | 39,192 | 94,453 | +636 | +1.65% |
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