| Organization | Department & Ministry | Institution Type | State |
|---|---|---|---|
| Oracle Home Textile Ltd. | — | — | Maharashtra |
| Oracle India Pvt. Ltd. | — | — | Delhi |
| O R B Energy Pvt. Ltd. | — | — | Karnataka |
| Orchid Pharma Ltd. | — | — | Tamil Nadu |
| ORF Lab. Facility (Animal Biotechnology Unit), Anand | — | — | Gujarat |
| Organic Coatings Ltd. | — | — | Maharashtra |
| Organic Farming Research Centre Navile | — | — | Karnataka |
| Organic Farming Research Station Nagenahalli | — | — | Karnataka |
| Organic Framing Research Centre U.S. Nagar | — | — | Uttarakhand |
| Orient Abrasives Ltd. | — | — | Maharashtra |
| Oriental Chemicals Works (Pvt) Ltd. | — | — | West Bengal |
| Oriental College of Pharmacy | — | — | Maharashtra |
| Oriental University | — | Centres of Higher Learning | Madhya Pradesh |
| Orient Cement Ltd. | — | — | Telangana |
| Orient Craft Ltd. | — | — | Haryana |
| Orient Paper Mills | — | — | Madhya Pradesh |
| Orient Refractories Ltd. | — | — | Rajasthan |
| Orient Steel & Industries Ltd. | — | — | West Bengal |
| Oriole Electronics Pvt. Ltd. | — | — | Maharashtra |
| Orissa Industries Ltd. | — | — | Odisha |
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