- Airport Authority of India
- Aarkey Power (Rameswaram) Ltd.
- Alstom Limited
- AP TRANSCO (APSEB)
- Ballarpur Industries Limited
- Bharat Heavy Electricals Ltd
- Central Public Works Department
- Chemplast Sanmer Limited
- Cochin International Airport Ltd
- Deccan Cement Limited
- EID Parry Limited
- Enmas GB Power System P. Ltd.
- Gamesa Wind Turbines P. Ltd.
- ICL Sugars Limited
- Ircon International Limited
- Kakatiya Cement Sugars Limited
- Larsen & Toubro Limited (ECC Construction Group)
- Mecon Limited
- M N Dastur & Co. Limited
- Moserbaer Photo Voltaic Ltd.
- Moserbaer Solor Ltd.
- Manali Petro Chemicals Ltd.
- Nagarjuna Construction Company Limited
- NEG Micon (India) P. Limited
- Parry Engineering & Exports Limited
- Regen Powertech P. Ltd.
- Seshasayee Paper Boards Limited
- SHAR Centre - ISRO, Sriharikota
- Siemens Limited
- Sirpur Paper Mills Limited
- Spic-SMO (Southern Petrochemical Industries Corporation Limited)
- Sree Royala Seema Green Energy Limited
- Supreme Renewable Energy Limited
- Suzlon Energy Limited
- Sri Maruti Wind Park Developers P. Ltd.
- Southern Agro Implements P. Ltd.
- Southern Power Distribution Corporation Limited, A.P.
- Tamilnadu Electricity Board (Tan Transco)
- Toshniwal Instruments P. Ltd.
- Tata Tele Services
- The India Cements Limited
- Triveni Engineering Works Limited
- VA Tech Hydro (I) P. Limited
- Varam Power Projects Limited
- Vestas Wind Technology India P. Ltd.