OESX Institutional Ownership & Shareholders
ORION ENERGY SYSTEMS INC (OESX) is currently held by 35 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $45.43M based on the latest available SEC Form 13F filings for the quarter ended September 30, 2026.
North Star Investment Management Corp. is currently the largest disclosed institutional shareholder of OESX tracked by InsiderSet, reporting ownership valued at approximately $16.09M in its September 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $10.51M, representing an estimated loss of -34.67% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 69% of the total disclosed OESX value among the investors covered in this analysis. Major shareholders include North Star Investment Management Corp., Grace & White Inc, Renaissance Technologies LLC, and several other long-term asset managers with concentrated positions in ORION ENERGY SYSTEMS INC (OESX).
This page ranks the largest institutional OESX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
35
Total Reported Value
$45.43M
Largest Holder
North Star Investment Management Corp.
Largest Position
$16.09M
Insider Transactions (90d)
16
Latest Filing Quarter
Q3 2026
New Institutional Positions
47
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| North Star Investment Management Corp. | 0.87% | 527,552 | $16,090,336 | $10,511,474 | -$5,578,862 | -34.67% | |
| Grace & White Inc | 1.26% | 252,268 | $7,694,174 | $5,026,440 | -$2,667,734 | -34.67% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 181,669 | $2,123,711 | $3,619,755 | +$1,496,044 | +70.44% |
| Vanguard Capital Management Llc | 0.00% | 127,484 | $1,490,288 | $2,540,119 | +$1,049,831 | +70.44% | |
| Us Bancorp \De\ | 0.00% | 70,155 | $820,112 | $1,397,838 | +$577,726 | +70.44% | |
| Marshall Wace, Llp | 0.00% | 61,342 | $717,088 | $1,222,239 | +$505,151 | +70.44% | |
| Essex Investment Management Co Llc | 0.10% | 22,089 | $673,715 | $440,123 | -$233,592 | -34.67% | |
| Sei Investments Co | 0.00% | 55,406 | $647,690 | $1,103,965 | +$456,275 | +70.45% | |
| Jane Street Group, Llc | 0.00% | 53,685 | $627,578 | $1,069,674 | +$442,096 | +70.44% | |
| Geode Capital Management, Llc | 0.00% | 38,125 | $445,788 | $759,641 | +$313,853 | +70.40% | |
| Blackrock, Inc. | 0.00% | 36,890 | $431,244 | $735,033 | +$303,789 | +70.44% | |
| Bridgeway Capital Management, Llc | 0.01% | 31,140 | $364,027 | $620,465 | +$256,438 | +70.44% | |
| Vanguard Fiduciary Trust Co | 0.00% | 22,796 | $266,485 | $454,210 | +$187,725 | +70.44% | |
| Farther Finance Advisors, Llc | 0.00% | 8,500 | $259,250 | $169,363 | -$89,888 | -34.67% | |
| Quadrature Capital Ltd | 0.00% | 20,219 | $236,360 | $402,864 | +$166,504 | +70.44% | |
| Morgan Stanley | 0.00% | 1,747 | $20,422 | $34,809 | +$14,387 | +70.45% | |
| Iag Wealth Partners, Llc | 0.00% | 1,700 | $19,873 | $33,873 | +$14,000 | +70.44% | |
| Firsthand Capital Management, Inc. | 0.03% | 1,400 | $16,366 | $27,895 | +$11,529 | +70.44% | |
| Axiom Investment Management Llc | 0.01% | 1,206 | $14,098 | $24,030 | +$9,932 | +70.45% | |
| Vanguard Global Advisers, Llc | 0.00% | 722 | $8,440 | $14,386 | +$5,946 | +70.45% | |
| Jpmorgan Chase & Co | 0.00% | 591 | $7,000 | $11,776 | +$4,776 | +68.22% | |
| Royal Bank Of Canada | 0.00% | 634 | $7,000 | $12,632 | +$5,632 | +80.46% | |
| Jones Financial Companies Lllp | 0.00% | 378 | $4,279 | $7,532 | +$3,253 | +76.01% | |
| Tieton Capital Management, Llc | 0.96% | 284,526 | $3,326 | $5,669,181 | +$5,665,855 | +170350.41% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 344 | $3,007 | $6,854 | +$3,847 | +127.94% | |
| Wells Fargo & Company/Mn | 0.00% | 200 | $2,338 | $3,985 | +$1,647 | +70.44% | |
| Osaic Holdings, Inc. | 0.00% | 119 | $1,390 | $2,371 | +$981 | +70.58% | |
| Harbour Investments, Inc. | 0.00% | 60 | $701 | $1,196 | +$495 | +70.54% | |
| Sbi Securities Co., Ltd. | 0.00% | 22 | $671 | $438 | -$233 | -34.67% | |
| Ubs Group Ag | 0.00% | 41 | $479 | $817 | +$338 | +70.55% | |
| Parallel Advisors, Llc | 0.00% | 19 | $222 | $379 | +$157 | +70.53% | |
| National Bank Of Canada | 0.00% | 15 | $174 | $299 | +$125 | +71.77% | |
| Caitong International Asset Management Co., Ltd | 0.00% | 4 | $122 | $80 | -$42 | -34.67% | |
| Barclays Plc | 0.00% | 1 | $12 | $20 | +$8 | +66.04% |
Frequently asked questions about OESX
Who are the largest institutional holders of OESX?
The largest institutional holders of OESX reported in the latest SEC Form 13F filings include North Star Investment Management Corp., Grace & White Inc, Renaissance Technologies LLC, Vanguard Capital Management Llc, and Us Bancorp \De\. InsiderSet ranks institutional holders by their latest reported OESX position.
What is OESX institutional ownership?
This page tracks OESX positions reported by institutional investment managers through SEC Form 13F. ORION ENERGY SYSTEMS INC (OESX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own OESX?
InsiderSet currently tracks 35 institutional managers reporting OESX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of OESX shareholders.
How much OESX stock do institutions own?
Institutional investment managers disclosed approximately $45.43M in OESX holdings for Q3 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was OESX institutional ownership last updated?
The latest OESX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended September 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional OESX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its OESX position after the reporting date.
Are institutions buying or selling OESX?
Institutional buying and selling can be analyzed by comparing OESX positions across consecutive 13F reporting periods. InsiderSet's OESX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View OESX ownership changes.
How has OESX institutional ownership changed over time?
InsiderSet tracks OESX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.