MANITOWOC, WI
ORION ENERGY SYSTEMS, INC.OESX— Latest position per institution from SEC 13F filings
15
Institutional holders
2.16M
Total shares held
21.70M
Estimated value
107.93K
Avg. position size
NORTH STAR INVESTMENT MANAGEMENT CORP.
CIK 1342857
Shares
526.95K
Value
6.16M
Filed
Jun 30, 2026
TIETON CAPITAL MANAGEMENT, LLC
CIK 1381954
Shares
284.53K
Value
3.33K
Filed
Jun 30, 2026
GRACE & WHITE INC /NY
CIK 903064
Shares
263.61K
Value
3.08M
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
181.67K
Value
2.12M
Filed
Jun 30, 2026
MYDA ADVISORS LLC
CIK 1589689
Shares
133.50K
Value
1.17M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
129.96K
Value
2M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
127.48K
Value
1.49M
Filed
Jun 30, 2026
MANATUCK HILL PARTNERS, LLC
CIK 1467902
Shares
71.43K
Value
624.28K
Filed
Mar 31, 2026
US BANCORP \DE\
CIK 36104
Shares
70.16K
Value
820.11K
Filed
Jun 30, 2026
MARSHALL WACE, LLP
CIK 1318757
Shares
61.34K
Value
717.09K
Filed
Jun 30, 2026
SEI INVESTMENTS CO
CIK 350894
Shares
55.41K
Value
647.69K
Filed
Jun 30, 2026
JANE STREET GROUP, LLC
CIK 1595888
Shares
53.69K
Value
627.58K
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
38.13K
Value
445.79K
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
36.89K
Value
431.24K
Filed
Jun 30, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 1107261
Shares
31.14K
Value
364.03K
Filed
Jun 30, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
22.80K
Value
266.49K
Filed
Jun 30, 2026
ESSEX INVESTMENT MANAGEMENT CO LLC
CIK 201772
Shares
20.61K
Value
240.91K
Filed
Jun 30, 2026
QUADRATURE CAPITAL LTD
CIK 1651424
Shares
20.22K
Value
236.36K
Filed
Jun 30, 2026
PENBROOK MANAGEMENT LLC
CIK 1381055
Shares
16.64K
Value
145.80K
Filed
Sep 30, 2025
TREXQUANT INVESTMENT LP
CIK 1633445
Shares
12.38K
Value
108.17K
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | NORTH STAR INVESTMENT MANAGEMENT CORP. | 1342857 | 526.95K | 6.16M | Jun 30, 2026 |
| 2 | TIETON CAPITAL MANAGEMENT, LLC | 1381954 | 284.53K | 3.33K | Jun 30, 2026 |
| 3 | GRACE & WHITE INC /NY | 903064 | 263.61K | 3.08M | Jun 30, 2026 |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 181.67K | 2.12M | Jun 30, 2026 |
| 5 | MYDA ADVISORS LLC | 1589689 | 133.50K | 1.17M | Mar 31, 2026 |
| 6 | VANGUARD GROUP INC | 102909 | 129.96K | 2M | Dec 31, 2025 |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 127.48K | 1.49M | Jun 30, 2026 |
| 8 | MANATUCK HILL PARTNERS, LLC | 1467902 | 71.43K | 624.28K | Mar 31, 2026 |
| 9 | US BANCORP \DE\ | 36104 | 70.16K | 820.11K | Jun 30, 2026 |
| 10 | MARSHALL WACE, LLP | 1318757 | 61.34K | 717.09K | Jun 30, 2026 |
| 11 | SEI INVESTMENTS CO | 350894 | 55.41K | 647.69K | Jun 30, 2026 |
| 12 | JANE STREET GROUP, LLC | 1595888 | 53.69K | 627.58K | Jun 30, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 38.13K | 445.79K | Jun 30, 2026 |
| 14 | BLACKROCK, INC. | 2012383 | 36.89K | 431.24K | Jun 30, 2026 |
| 15 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1107261 | 31.14K | 364.03K | Jun 30, 2026 |
| 16 | VANGUARD FIDUCIARY TRUST CO | 933478 | 22.80K | 266.49K | Jun 30, 2026 |
| 17 | ESSEX INVESTMENT MANAGEMENT CO LLC | 201772 | 20.61K | 240.91K | Jun 30, 2026 |
| 18 | QUADRATURE CAPITAL LTD | 1651424 | 20.22K | 236.36K | Jun 30, 2026 |
| 19 | PENBROOK MANAGEMENT LLC | 1381055 | 16.64K | 145.80K | Sep 30, 2025 |
| 20 | TREXQUANT INVESTMENT LP | 1633445 | 12.38K | 108.17K | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.