?- ABB Ltd
- Siemens Gamesa Renewable Energy SA
- Rockwell Automation Inc
- Bachmann electronic GmbH
- Avantis Energy Group
- Goldwind Science & Technology Co. Ltd
- Emergya Wind Technologies BV
- Northern Power System
- Enercon GmbH
- M. Torres Olvega Industrial
- ReGen Powertech Pvt. Ltd