[citation needed] Subsequently, Supertest was renamed to BP Canada Ltd, and other Canadian interests of British Petroleum were amalgamated to the new company.

[6] A year later in 1993, Talisman Energy bought Encor Inc from BCE, doubling in size and becoming one of Canada's largest petroleum companies.

[7] In January 2008, Talisman agreed to buy RSX Energy Inc, an oil and gas company based in Calgary, Alberta focused on exploration and development in Western Canada.

[8] In July 2012, Talisman Energy sold part of its interests in Britain to focus on higher-growth shale gas projects in North America and Southeast Asia.

[9][10] On September 10, 2012, the company announced that John Manzoni had agreed to step down as president and CEO, effective immediately, and would be replaced by board member Hal Kvisle.

[11] The news surprised market analysts and fueled speculation that Talisman was then a greater potential takeover target, similar to that of industry peer Nexen Inc. when it agreed to a $15.1 billion acquisition made by China National Offshore Oil Co. two months earlier.

However, Kvisle stressed that he and the board would be focused on making Talisman a "sustainable long-term, successful Canadian company" rather than putting it up for sale.

[12] In October 2013, activist investor Carl Icahn acquired around 61 million shares in the company and announced he would be seeking a place on the board.

[13][14] Following months of speculation and negotiations, Spanish energy company Repsol tendered an offer to buy Talisman in early December 2014 for US$8 per share.

[19] International observers accused the Sudanese government of forcibly displacing residents to make way for oil exploration and exploitation.

[22] In 2003, Talisman Energy divested the Sudan interest acquired through the Arakis acquisition, selling its complete 25% stake to Indian company ONGC Videsh.