Indian Oil Corporation Limited (IOCL), one of the largest oil and gas companies in India, has several subsidiaries and joint ventures across various sectors within the energy industry. Please note that the status of subsidiaries may change over time due to business decisions, mergers, acquisitions, or divestitures. Here are some of the notable subsidiaries of Indian Oil Corporation Limited:

1. Chennai Petroleum Corporation Limited (CPCL):

   • CPCL is a subsidiary of Indian Oil Corporation and operates as a refining and marketing company. It has a significant presence in the petroleum industry.

2. Bongaigaon Refinery and Petrochemicals Limited (BRPL):

   • BRPL is a subsidiary of IOCL located in Assam, engaged in the refining and marketing of petroleum products.

3. Indian Oil Tanking Limited (IOTL):

   • A joint venture between Indian Oil Corporation and Germany-based Tank & Rast, IOTL is involved in the storage and transportation of petroleum products.

4. Lanka IOC PLC:

   • A subsidiary of IOCL in Sri Lanka, Lanka IOC PLC is engaged in refining, marketing, and distributing petroleum products.

5. Indian Oil (Mauritius) Limited:

   • This subsidiary is based in Mauritius and is involved in the exploration, production, and marketing of petroleum and petrochemical products.

6. IOCL Middle East FZE:

   • This is a wholly-owned subsidiary of Indian Oil Corporation in the United Arab Emirates (UAE), involved in the trading of crude oil and petroleum products.

7. IndianOil (Netherlands) B.V.:

   • A wholly-owned subsidiary based in the Netherlands, engaged in trading crude oil, petroleum products, and petrochemicals.

8. Indo Cat Pvt. Ltd.:

   • A joint venture between Indian Oil Corporation and CATALYST Speciality Products Ltd., Indo Cat Pvt. Ltd. is involved in the production of specialty catalysts.

9. Indian Oil (USA) LLC:

   • A wholly-owned subsidiary in the United States, Indian Oil (USA) LLC is engaged in trading crude oil and petroleum products.

10. Indian Oil Petronas Private Limited (IPPL):

    • A joint venture between IOCL and Petronas, IPPL is involved in the import, storage, and bottling of liquefied petroleum gas (LPG).

11. IOCL Biofuels Limited:

    • This subsidiary is involved in the production of biofuels and is part of Indian Oil’s efforts to explore renewable energy sources.

These subsidiaries and joint ventures contribute to Indian Oil Corporation’s diversified operations across the energy value chain, from exploration and refining to marketing and distribution. For the most up-to-date and accurate information about IOCL’s subsidiaries, it is recommended to refer to the latest financial reports, disclosures, or official communications from the company.