Eastern Investments Ltd.(EIL),The Orissa Minerals Development Company Ltd. (OMDC) and The Bisra Stone Lime Company Ltd.(BSLC) are collectively known as the BIRD Group of Companies(BGC). The Bird Group of Companies (BGC), under administrative control of the Ministry of Steel, Government of India was part of erstwhile Bird & Company Ltd, which was nationalized by the
Government of India by The Bird & Company Ltd ( Acquisition and Transfer of Undertakings and other properties ) Act, 1980 ( Act No. 67 of 1980).Consequent upon such nationalization of the Undertaking, shares held by the said company in twenty one companies specified in Schedule I to the aforesaid Act stood transferred in the name of the President of India. Based on the shareholding pattern, out of the twenty-one companies, the above three companies came under the administrative control of the Ministry of Steel, Government of India, and renamed as Bird Group of Companies which has head quarter at Salt Lake in Kolkata, West Bengal.