Subsidiaries / Joint ventures / Associate Companies

BCPL owns a Petrochemical Complex at Lepetkata, Dibrugarh, Assam for production, distribution and marketing of petrochemical products. The Company holds 10% equity share capital in BCPL. GAIL (India) Limited, Government of Assam and Numaligarh Refinery Limited hold 70%, 10% and 10% equity share capital respectively.

DNP Ltd. was incorporated with the main objective of acquisition, transportation and distribution of natural gas. The Company holds 23% equity share capital of DNP Ltd. Assam Gas Company Limited and Numaligarh Refinery Limited hold 51% and 26% equity share capital respectively.

The Company is holding 48.80%, Government of Assam along with its owned entities is holding 51.11% and others are holding 0.09% of equity shares of APL. Assam Petro- Chemicals Limited commissioned a 500 TPD Methanol plant on 14th April, 2023. It is also implementing a 200 TPD Formaldehyde project. The Formaldehyde project is planned to be commissioned in the beginning of the year 2024.

IGGL formed by five petroleum sector PSUs viz. OIL, ONGC, IOCL, GAIL and NRL (holding 20% each) is implementing North-East Gas Grid Pipeline to improve gas supply connectivity to all the eight North Eastern States of India.

HPOIL was incorporated on 30th November 2018 as a 50:50 joint venture between Oil India Limited (OIL) and Hindustan Petroleum Corporation Limited (HPCL) to develop City Gas Distribution (CGD) Networks. HPOIL operates CGD Networks in the Ambala-Kurukshetra and Kolhapur Geographical Areas in Haryana and Maharashtra, respectively, where it has successfully completed the Minimum Work Programme in both GAs and is pursuing further expansion. HPOIL is also authorised to develop the Nagaland State Geographical Area under the 12th CGD Bidding Round.

PBGPL was incorporated on 19th November 2019 as a joint venture between Oil India Limited (26%), GAIL Gas Limited (26%) and Assam Gas Company Limited (48%) to develop City Gas Distribution (CGD) Networks in Assam. PBGPL operates in the Cachar, Hailakandi and Karimganj, and Kamrup and Kamrup Metropolitan Geographical Areas of Assam.

NEGDCL was incorporated on 21st July 2023 as a joint venture between Oil India Limited (49%) and Assam Gas Company Limited (51%) to develop City Gas Distribution (CGD) Networks in Assam and Tripura. NEGDCL is authorised to develop CGD Networks across six districts of Assam- Darrang, Udalguri, Sonitpur, Biswanath, Lakhimpur and Dhemaji- and six districts of Tripura, comprising South Tripura, Sepahijala, Dhalai, North Tripura, Unakoti and Khowai.

AGPL was incorporated on 15th November 2025 as a 50:50 joint venture between Oil India Limited (OIL) and Bharat Petroleum Corporation Limited (BPCL) to develop the Arunachal Pradesh State Geographical Area under the 12th CGD Bidding Round.

APGCL OIL Green Power Limited (AOGPL)

The Company holds 25% stake in Suntera Nigeria 205 Ltd., Nigeria pursuant to a Share Purchase Agreement (SPA) signed with Suntera Resources Ltd., Cyprus and Indian Oil Corporation Limited (IOCL) on August 31, 2006. Suntera Nigeria 205 Ltd. was incorporated with the objective to engage in the petroleum business including exploration production and development of crude oil and natural gas in Nigeria.

The Company holds 40% share in BREML. BREML holds 10% Participating Interest in the Rovuma Area 1 Offshore Block in Mozambique. BREML was incorporated in British Virgin Islands but has been redomiciled to Mauritius on 23rd January 2018.

The Company through its wholly owned subsidiary Oil India Sweden AB, owns 50% of the shares in Indoil Netherlands B.V which in turn holds 7% equity shares in Petrocarabobo S.A. (joint venture Company) for Project Carabobo-1, Venezuela.

The Company through its wholly owned subsidiary Oil India International B.V (OIIBV) holds 50% share in WorldAce Investments Ltd, a Company incorporated in Cyprus. WorldAce Investments Ltd. holds 100% share in LLC Stimul-T, Russia. Stimul -T has filed for bankruptcy on 10th May 2023 due to adverse operational and financial circumstances.

The Company through its wholly owned subsidiary Oil India International Pte. Ltd (OIIPL) holds 33.5% share in VIPL, a Company incorporated in Singapore on 20th May, 2016. VIPL holds 23.9% share in JSC Vankorneft, Russia which holds two producing licenses in Eastern Siberia, Russia.

The Company through its wholly owned subsidiary Oil India International Pte. Ltd. (OIIPL) holds 33.5% share in TIPL, a Company incorporated in Singapore on 23rd May, 2016. TIPL holds 29.9% shares in LLC “TYNGD”, Russia which holds two producing licenses in Eastern Siberia, Russia.