MANITOWOC, WI
ORION ENERGY SYSTEMS, INC.OESX— Latest position per institution from SEC 13F filings
15
Institutional holders
2.11M
Total shares held
17.04M
Estimated value
105.26K
Avg. position size
NORTH STAR INVESTMENT MANAGEMENT CORP.
CIK 1342857
Shares
525.55K
Value
4.59M
Filed
Mar 31, 2026
TIETON CAPITAL MANAGEMENT, LLC
CIK 1381954
Shares
266.48K
Value
2.33K
Filed
Mar 31, 2026
GRACE & WHITE INC /NY
CIK 903064
Shares
241.39K
Value
2.11M
Filed
Mar 31, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
178.47K
Value
1.56M
Filed
Mar 31, 2026
MYDA ADVISORS LLC
CIK 1589689
Shares
133.50K
Value
1.17M
Filed
Mar 31, 2026
SEI INVESTMENTS CO
CIK 350894
Shares
130.10K
Value
1.14M
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
111.92K
Value
978.22K
Filed
Mar 31, 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
613.15K
Filed
Mar 31, 2026
MARSHALL WACE, LLP
CIK 1318757
Shares
56.92K
Value
497.52K
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
40.10K
Value
350.53K
Filed
Mar 31, 2026
JANE STREET GROUP, LLC
CIK 1595888
Shares
27.15K
Value
237.29K
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
24.21K
Value
211.59K
Filed
Mar 31, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 1107261
Shares
23.94K
Value
209.24K
Filed
Mar 31, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
17.31K
Value
151.31K
Filed
Mar 31, 2026
PENBROOK MANAGEMENT LLC
CIK 1381055
Shares
16.64K
Value
145.80K
Filed
Sep 30, 2025
NEWEDGE ADVISORS, LLC
CIK 1633516
Shares
15.08K
Value
231.96K
Filed
Dec 31, 2025
ESSEX INVESTMENT MANAGEMENT CO LLC
CIK 201772
Shares
12.56K
Value
109.75K
Filed
Mar 31, 2026
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 | 525.55K | 4.59M | Mar 31, 2026 |
| 2 | TIETON CAPITAL MANAGEMENT, LLC | 1381954 | 266.48K | 2.33K | Mar 31, 2026 |
| 3 | GRACE & WHITE INC /NY | 903064 | 241.39K | 2.11M | Mar 31, 2026 |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 178.47K | 1.56M | Mar 31, 2026 |
| 5 | MYDA ADVISORS LLC | 1589689 | 133.50K | 1.17M | Mar 31, 2026 |
| 6 | SEI INVESTMENTS CO | 350894 | 130.10K | 1.14M | Mar 31, 2026 |
| 7 | VANGUARD GROUP INC | 102909 | 129.96K | 2M | Dec 31, 2025 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 111.92K | 978.22K | Mar 31, 2026 |
| 9 | MANATUCK HILL PARTNERS, LLC | 1467902 | 71.43K | 624.28K | Mar 31, 2026 |
| 10 | US BANCORP \DE\ | 36104 | 70.16K | 613.15K | Mar 31, 2026 |
| 11 | MARSHALL WACE, LLP | 1318757 | 56.92K | 497.52K | Mar 31, 2026 |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 40.10K | 350.53K | Mar 31, 2026 |
| 13 | JANE STREET GROUP, LLC | 1595888 | 27.15K | 237.29K | Mar 31, 2026 |
| 14 | BLACKROCK, INC. | 2012383 | 24.21K | 211.59K | Mar 31, 2026 |
| 15 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1107261 | 23.94K | 209.24K | Mar 31, 2026 |
| 16 | VANGUARD FIDUCIARY TRUST CO | 933478 | 17.31K | 151.31K | Mar 31, 2026 |
| 17 | PENBROOK MANAGEMENT LLC | 1381055 | 16.64K | 145.80K | Sep 30, 2025 |
| 18 | NEWEDGE ADVISORS, LLC | 1633516 | 15.08K | 231.96K | Dec 31, 2025 |
| 19 | ESSEX INVESTMENT MANAGEMENT CO LLC | 201772 | 12.56K | 109.75K | Mar 31, 2026 |
| 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.