38 institutions reported holding $17.2M of ORION ENERGY SYSTEMS INC (OESX) in SEC 13F filings for 2026-03-31. Largest institutional holders: North Star Investment Management Corp. ($4.6M), Tieton Capital Management, LLC ($2.3M), GRACE & WHITE INC /NY ($2.1M), RENAISSANCE TECHNOLOGIES LLC ($1.6M), MYDA Advisors LLC ($1.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | North Star Investment Management Corp. | $4.6M | 525,552 | Added |
| 2 | Tieton Capital Management, LLC | $2.3M | 266,476 | Added |
| 3 | GRACE & WHITE INC /NY | $2.1M | 241,387 | Added |
| 4 | RENAISSANCE TECHNOLOGIES LLC | $1.6M | 178,469 | Added |
| 5 | MYDA Advisors LLC | $1.2M | 133,505 | New |
| 6 | SEI INVESTMENTS CO | $1.1M | 130,101 | Added |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $978,216 | 111,924 | New |
| 8 | Manatuck Hill Partners, LLC | $624,281 | 71,428 | New |
| 9 | US BANCORP \DE\ | $613,155 | 70,155 | Added |
| 10 | MARSHALL WACE, LLP | $497,516 | 56,924 | Added |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $350,530 | 40,098 | Added |
| 12 | JANE STREET GROUP, LLC | $237,291 | 27,150 | New |
| 13 | BlackRock, Inc. | $211,587 | 24,209 | Hold |
| 14 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $209,236 | 23,940 | New |
| 15 | VANGUARD FIDUCIARY TRUST CO | $151,307 | 17,312 | New |
| 16 | ESSEX INVESTMENT MANAGEMENT CO LLC | $109,748 | 12,557 | New |
| 17 | Trexquant Investment LP | $108,166 | 12,376 | New |
| 18 | XTX Topco Ltd | $97,836 | 11,194 | New |
| 19 | Quadrature Capital Ltd | $88,099 | 10,080 | Trimmed |
| 20 | IAG Wealth Partners, LLC | $14,858 | 1,700 | Hold |
| 21 | Firsthand Capital Management, Inc. | $12,236 | 1,400 | Hold |
| 22 | Axiom Investment Management LLC | $10,540 | 1,206 | Trimmed |
| 23 | MORGAN STANLEY | $7,665 | 877 | Hold |
| 24 | Vanguard Global Advisers, LLC | $6,310 | 722 | New |
| 25 | UBS Group AG | $3,671 | 420 | Added |
Source: SEC Form 13F filings · as of 2026-03-31