Who owns Orion Energy Systems (OESX)
Which tracked institutional funds hold OESX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OESX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-14). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
6 tracked funds added or opened OESX while 4 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
OESX’s largest tracked holder by dollar value, North Star Investment Management Corp., sizes it at 0.3% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in OESX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 34 tracked filers holding OESX, 21 increased or opened the position and 11 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in OESX between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Full exits 3
- Tieton Capital Management, LLC$2M
- MYDA Advisors LLC$1M
- Manatuck Hill Partners, LLC$624K
Largest adds
- North Star Investment Management Corp.$2M
- GRACE & WHITE INC /NY$972K
- RENAISSANCE TECHNOLOGIES LLC$564K
- VANGUARD CAPITAL MANAGEMENT LLC$512K
- MARSHALL WACE, LLP$413K
- JANE STREET GROUP, LLC$390K
Largest trims
- SEI INVESTMENTS CO$489K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| North Star Investment Management Corp. added | 526,952 | $6M | 23.4% | 2026-Q2 |
| GRACE & WHITE INC /NY added | 263,613 | $3M | 11.7% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 181,669 | $2M | 8.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 127,484 | $1M | 5.7% | 2026-Q2 |
| US BANCORP \DE\ | 70,155 | $820K | 3.1% | 2026-Q2 |
| MARSHALL WACE, LLP added | 61,342 | $717K | 2.7% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 55,406 | $648K | 2.5% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 53,685 | $628K | 2.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 38,125 | $446K | 1.7% | 2026-Q2 |
| BlackRock, Inc. added | 36,890 | $431K | 1.6% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 31,140 | $364K | 1.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 22,796 | $266K | 1.0% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC added | 20,608 | $241K | 0.9% | 2026-Q2 |
| Quadrature Capital Ltd added | 20,219 | $236K | 0.9% | 2026-Q2 |
| Farther Finance Advisors, LLC new | 9,700 | $113K | 0.4% | 2026-Q2 |
| MORGAN STANLEY added | 1,747 | $20K | 0.1% | 2026-Q2 |
| IAG Wealth Partners, LLC | 1,700 | $20K | 0.1% | 2026-Q2 |
| Firsthand Capital Management, Inc. | 1,400 | $16K | 0.1% | 2026-Q2 |
| Axiom Investment Management LLC | 1,206 | $14K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 722 | $8K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA new | 634 | $7K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 591 | $7K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 378 | $4K | 0.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 344 | $4K | 0.0% | 2026-Q2 |
| COMPASS FINANCIAL MANAGEMENT LLC new | 268 | $3K | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN | 200 | $2K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. | 119 | $1K | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. added | 60 | $701 | 0.0% | 2026-Q2 |
| UBS Group AG trimmed | 41 | $479 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. | 31 | $362 | 0.0% | 2026-Q2 |
| Parallel Advisors, LLC | 19 | $222 | 0.0% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ new | 15 | $174 | 0.0% | 2026-Q2 |
| BARCLAYS PLC trimmed | 1 | $12 | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC trimmed | 0 | — | 0.0% | 2026-Q2 |
| Tieton Capital Management, LLC added | 266,476 | $2M | 8.9% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC added | 129,958 | $2M | 7.6% | 2025-Q4 stale (2 quarters behind) |
| Annandale Capital, LLC trimmed | 17,333 | $2M | 5.8% | 2025-Q3 stale (3 quarters behind) |
| MYDA Advisors LLC new | 133,505 | $1M | 4.4% | 2026-Q1 stale (1 quarter behind) |
| Manatuck Hill Partners, LLC new | 71,428 | $624K | 2.4% | 2026-Q1 stale (1 quarter behind) |
| Penbrook Management LLC trimmed | 16,644 | $146K | 0.6% | 2025-Q3 stale (3 quarters behind) |
| Trexquant Investment LP new | 12,376 | $108K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| XTX Topco Ltd trimmed | 11,194 | $98K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| CITADEL ADVISORS LLC trimmed | 142,982 | $87K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 126,545 | $77K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| THOMPSON DAVIS & CO., INC. added | 96,905 | $58K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| STATE STREET CORP | 85,608 | $52K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| NORTHERN TRUST CORP | 55,794 | $33K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| BANK OF AMERICA CORP /DE/ | 2,027 | $31K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Mariner, LLC | 43,527 | $27K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| Beacon Pointe Advisors, LLC | 31,590 | $19K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| KESTRA PRIVATE WEALTH SERVICES, LLC added | 20,000 | $12K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| RAYMOND JAMES FINANCIAL INC added | 15,137 | $9K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Register Financial Advisors LLC | 15,000 | $9K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Smith Anglin Financial, LLC | 15,000 | $9K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| LPL Financial LLC | 12,568 | $8K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| Tower Research Capital LLC (TRC) added | 288 | $3K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Allworth Financial LP trimmed | 50 | $438 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Federation des caisses Desjardins du Quebec | 650 | $390 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| EverSource Wealth Advisors, LLC | 10 | $154 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| IFP Advisors, Inc | 3 | $26 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| CITIGROUP INC | 1 | $9 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.