Essar Energy plc (LSE: ESSR) is a United Kingdom-incorporated, Mauritius-headquartered energy business operating primarily in India. Part of the Essar Group, the firm has interests in both the power generation and petroleum industries. It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.

Established in 1998 as a wholly-owned business unit of the Essar Group conglomerate, the firm was partly floated on the London Stock Exchange in April 2010, marking the exchange's largest initial public offering since December 2007. The company was added to the FTSE 100 Index at the subsequent quarterly review. Essar Group retains an approximate 76% stake in Essar Energy. The lead underwriters to the Initial Public Offering were JPMorgan Chase and Deutsche Bank. The primary offering raised £1.3bn. Ravi Ruia, the Chairman, and Sanjay Mehta, a senior board member of Essar Global Limited, were identified in an Economic Times of India article as instrumental in the listing.

Source: Wikipedia