The stock price of Talisman Energy Inc. (TSE:TLM) has jumped over 4.5% today after billionaire investor tweeted about his investment in the company. The stock closed at $12.75 per share, which is up from a lower price of $11.43 from the beginning of this month. Carl Icahn’s tweet said “Disclosed approx 61 million share positions in Talisman Energy. May have conversations with mgmt re strategic alternatives, board seats, etc.” Talisman is an oil and gas exploration company. Icahn bought 61,554,602 shares (5.97% stake) in Talisman Energy for $277 million, according to BusinessInsider.