Exillon Energy, a Siberia-focused oil group, aims to become the first large Russian company to list on the London Stock Exchange in the 18 months since the financial crisis gripped markets. The company, headquartered in Dubai with offices in Russia, is in talks with UK investors about an IPO that could value it at about $500m, outstripping the last big listing - Russian rail freight operator Globaltrans, which raised $449.4m in April 2008.
