Orion Energy Systems, Inc. (OESX) Ownership
OESX ownership summary
as of October 18, 2026- Institutions
- 44.6% of shares outstanding
- Insiders
- 14.07% of shares outstanding
- Shares outstanding
- 4.1M
- Float
- 3.4M shares available to trade
- Short interest
- 4.46% 151K shares short
- Days to cover
- 1.83 short interest down 10.1% vs prior month
- Institutions 44.58%
- Insiders 14.07%
- Other investors 41.36%
OESX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | North Star Investment Management Corp | 12.99% | 527K | $11.9M | +1,400 (+0.3%) | June 30, 2026 |
| 2 | Tieton Capital Management, LLC | 7.01% | 285K | $6.4M | +18,050 (+6.8%) | June 30, 2026 |
| 3 | Grace & White Inc | 6.50% | 264K | $5.9M | +22,226 (+9.2%) | June 30, 2026 |
| 4 | Renaissance Technologies Corp | 4.48% | 182K | $4.1M | +3,200 (+1.8%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 3.14% | 127K | $2.9M | +15,560 (+13.9%) | June 30, 2026 |
| 6 | U.S. Bancorp | 1.73% | 70K | $1.6M | — | June 30, 2026 |
| 7 | Marshall Wace Asset Management Ltd | 1.51% | 61K | $1.4M | +4,418 (+7.8%) | June 30, 2026 |
| 8 | SEI Investments Co | 1.37% | 55K | $1.2M | −74,695 (−57.4%) | June 30, 2026 |
| 9 | Jane Street Group LLC | 1.32% | 54K | $1.2M | +26,535 (+97.7%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 0.94% | 38K | $858,575 | −1,973 (−4.9%) | June 30, 2026 |
| 11 | BlackRock Inc | 0.91% | 37K | $830,763 | +12,681 (+52.4%) | June 30, 2026 |
| 12 | Bridgeway Capital Management, LLC | 0.77% | 31K | $701,273 | +7,200 (+30.1%) | June 30, 2026 |
| 13 | Vanguard Fiduciary Trust Co | 0.56% | 23K | $513,366 | +5,484 (+31.7%) | June 30, 2026 |
| 14 | Essex Investment Management Company, LLC | 0.51% | 21K | $464,092 | +8,051 (+64.1%) | June 30, 2026 |
| 15 | Quadrature Capital Limited | 0.50% | 20K | $455,332 | +10,139 (+100.6%) | June 30, 2026 |
| 16 | Morgan Stanley - Brokerage Accounts | 0.04% | 1,747 | $39,342 | +870 (+99.2%) | June 30, 2026 |
| 17 | IAG Wealth Partners, LLC | 0.04% | 1,700 | $38,284 | — | June 30, 2026 |
| 18 | SiVest Group, Inc. | 0.03% | 1,400 | $31,528 | — | June 30, 2026 |
| 19 | Axiom Investment Management LLC | 0.03% | 1,206 | $27,159 | — | June 30, 2026 |
| 20 | Vanguard Global Advisers, LLC | 0.02% | 722 | $16,259 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 136K shares and 2 cut 77K.
OESX top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | North Star Opportunity I | 7.27% | 295K | $6.6M | — | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.09% | 85K | $1.9M | — | August 31, 2026 |
| 3 | Bridgeway Ultra-Small Company | 0.77% | 31K | $701,273 | +7,200 (+30.1%) | June 30, 2026 |
| 4 | Fidelity Extended Market Index | 0.42% | 17K | $381,759 | −91 (−0.5%) | August 31, 2026 |
| 5 | Acuitas US Microcap Institutional | 0.34% | 14K | $306,272 | — | June 30, 2026 |
| 6 | iShares Micro-Cap ETF | 0.28% | 11K | $252,810 | −77 (−0.7%) | September 30, 2026 |
| 7 | Fidelity Total Market Index | 0.17% | 7,078 | $159,397 | — | August 31, 2026 |
| 8 | Fidelity Series Total Market Index | 0.12% | 5,070 | $114,176 | — | August 31, 2026 |
| 9 | Vanguard Balanced Index Inv | 0.07% | 2,841 | $63,979 | — | August 31, 2026 |
| 10 | Fidelity Nasdaq Composite Index | 0.05% | 2,038 | $45,896 | — | August 31, 2026 |
| 11 | Firsthand Alternative Energy | 0.03% | 1,400 | $31,528 | — | June 30, 2026 |
| 12 | Dimensional US Sustainability Core 1 ETF | 0.03% | 1,295 | $29,163 | — | September 30, 2026 |
| 13 | Dimensional US Core Equity 2 ETF | 0.03% | 1,150 | $25,898 | — | September 30, 2026 |
| 14 | DFA US Core Equity 2 I | 0.03% | 1,121 | $25,245 | — | August 31, 2026 |
| 15 | DFA US Sustainability Core 1 | 0.03% | 1,121 | $25,245 | — | August 31, 2026 |
| 16 | DFA US Social Core Equity 2 Portfolio | 0.03% | 1,100 | $24,772 | — | August 31, 2026 |
| 17 | DFA US Vector Equity Class F | 0.03% | 1,068 | $24,051 | +1,068 (0.0%) | July 31, 2026 |
| 18 | DFA US Core Equity 1 I | 0.02% | 1,012 | $22,790 | — | August 31, 2026 |
| 19 | DFA US Core Equity Class F | 0.02% | 1,010 | $22,745 | — | July 31, 2026 |
| 20 | Avantis US Small Cap Equity ETF | 0.02% | 835 | $18,804 | +36 (+4.5%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OESX insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-27 | J Per Brodin | Buy | $11.07 | 500 | $5,535 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OESX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OESX
Institutional investors own 44.6% of Orion Energy Systems's shares and insiders 14.07%. The largest holder is North Star Investment Management Corp with 12.99% of the shares (527K), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 2 reduced their stake in the latest filings. Short interest is 4.46% of the float, or 1.83 days of average trading volume. The share count rose 58.0% since 2014.
Related: OESX analyst forecast, OESX key metrics. See the OESX stock overview for the latest quote and news.
OESX ownership FAQ
Who owns the most Orion Energy Systems stock?
The largest shareholders of Orion Energy Systems are North Star Investment Management Corp (12.99%), Tieton Capital Management, LLC (7.01%), Grace & White Inc (6.50%), Renaissance Technologies Corp (4.48%), Vanguard Capital Management, LLC (3.14%).
What percentage of Orion Energy Systems is owned by institutions?
Institutions hold 44.6% of Orion Energy Systems's shares outstanding; insiders hold 14.07%.
Which funds own Orion Energy Systems?
The largest fund holders of Orion Energy Systems are North Star Opportunity I (7.27%), Vanguard MStar Total Stk Mkt Idx Invest (2.09%), Bridgeway Ultra-Small Company (0.77%), Fidelity Extended Market Index (0.42%), Acuitas US Microcap Institutional (0.34%).
What is Orion Energy Systems's short interest?
151K shares of Orion Energy Systems were sold short, 4.46% of the float; at the average daily volume it would take 1.83 days to cover.
Are insiders buying or selling Orion Energy Systems?
Of the latest 1 reported insider transactions in Orion Energy Systems (since February 27, 2026), 1 were purchases and 0 were sales.
How many shares of Orion Energy Systems are outstanding?
Orion Energy Systems has 4.1M shares outstanding, of which 3.4M are in the public float.