Top 100 companies of India as per market capital: 31 March 2020

The company was co-founded by Dhirubhai Ambani and Champaklal Damani in 1960's as Reliance Commercial Corporation. In 1965, the partnership ended and Dhirubhai continued the polyester business of the firm.[15] In 1966, Reliance Textiles Engineers Pvt. Ltd. was incorporated in Maharashtra. It established a synthetic fabrics mill in the same year at Naroda in Gujarat.[16] On 8 May 1973, it became Reliance Industries Limited. In 1975, the company expanded its business into textiles, with "Vimal" becoming its major brand in later years. The company held its Initial public offering (IPO) in 1977.[17] The issue was over-subscribed by seven times.[18] In 1979, a textiles company Sidhpur Mills was amalgamated with the company.[19] In 1980, the company expanded its polyester yarn business by setting up a Polyester Filament Yarn Plant in Patalganga, Raigad, Maharashtra with financial and technical collaboration with E. I. du Pont de Nemours & Co., U.S.[16]