per share (at face value of 10 per share). The IPO was oversubscribed by 14.17 times. Against an IPO issue size of it received bids for making it the second highest collections in any IPO in India. On the first day of its listing on the stock market, its shares soared 40% higher than IPO price. With the listing, CIL became the fourth most valued company on the Indian stock exchanges with a market value of . CIL was included in the 30-member BSE SENSEX on 8 August 2011. On 30 January 2015, in an offer for sale (OFS), Government of India sold a further 10% stake in CIL. Priced at per share, the sale fetched the government , making it the largest ever equity offering in the Indian share market. Operations CIL is the largest coal producing company in the world. It produced 536.51 MT (million tonne) coal during FY 2015–16. Coal India operates through 83 mining areas in 8 states of India. As on 1 April 2015, it has 430 coal mines out of which 175 are open cast, 227 are underground and 28 are mixed mines. Production from open cast mines during FY 2014–15 was 92.91% of total production of 494.24 MT. Underground mines contributed to 7.09% of production. CIL further operates 15 coal washeries, out of which 12 are for coking coal and 3 are for non-coking coal with 23.30 MTY and 13.50 MTY capacities respectively. CIL's only Low Temperature Carbonisation Plant of Dankuni Coal Complex is currently run on lease basis by its subsidiary SECL. In addition to above, it also manages 200 other establishments like workshops, hospitals, training institutes, mine-rescue setups, etc. Subsidiaries CIL produces coal through seven of its wholly owned subsidiaries. These are Eastern Coalfields Limited (ECL), Bharat Coking Coal Limited (BCCL), Central Coalfields Limited (CCL), Western Coalfields Limited (WCL), South Eastern Coalfields Limited (SECL), Northern Coalfield Limited (NCL), and Mahanadi Coalfields Limited (MCL). Its 8th wholly owned subsidiary Central Mine Planning & Design Institute Limited (CMPDIL) provides exploration, planning and technical support to all the 7 production subsidiaries. CMPDIL also provides consulting services to third-party market clients in the field of exploration, mining, allied engineering & testing, management-systems, training, etc. The North Eastern Coalfields (NEC) and Dankuni Coal Complex (DCC) are owned directly by the parent holding company of CIL. However, DCC has been leased to SECL since 1995. CIL also