Imperial Energy Deal Expected Soon

Imperial Energy, a London-listed oil firm developing deposits in Siberia, rose the most in a month in London trading Wednesday on takeover speculation.

Imperial Energy climbed 93 pence, or 8.9 percent, to close at 1,137 pence. That's the biggest one-day gain since July 15, valuing the company at ?1.16 billion ($2.17 billion).

The company could be sold "within days," Reuters reported Wednesday, citing a source familiar with the deal.

Imperial said last week that it received a second approach in a month, without naming any potential bidders.

India's Oil & Natural Gas, China's Sinopec and Korea National Oil Corp. are interested in acquiring Imperial, Reuters reported. Gavin Davis, a spokesman for Imperial Energy, declined to comment, as did Oil & Natural Gas chairman R.S. Sharma. Bae Ho Jun, a spokesman at Korea National Oil, Zhang Zhiguo, a spokesman at Sinopec, and Rosneft spokesman Nikolai Manvelov all declined to comment.