The company was founded in Stockholm in 1947, as AB Atomenergi, to develop and operate nuclear power stations in Sweden.

In the 1990s and 2000s, the company acquired the German SINA Industrieservice GmbH; the nuclear power division of the Norwegian Scandpower AS; the German Industrieanlagen Fritz & Marx; the British Environmental Remediation Services Ltd.; the ISS international health physics group; the American RACE LLC; the German Dr Fary GmbH & Co KG and the English Alpha Engineering Ltd.[5] Studsvik has a radioactive waste processing facility in Erwin, Tennessee in the US, which opened in 2000.

[6] Studsvik's metal-recycling facility, designed to assist the Nuclear Decommissioning Authority's National LLW Strategy, opened in September 2009.

[8] Studsvik software has been used throughout the world for light water reactor core design, analysis, and operational support.

In April 2011, Studsvik praised defeat of a bill in the US State of Tennessee legislature that would have prohibited dumping low-level nuclear waste in landfills.