Studsvik AB was listed on Stockholmsbörsen's (Stockholm-stock exchange) O list on May 4, 2001.
The facility in Erwin, Tennessee was taken into operations and also the BNCT facility for treatment of brain tumours. To strenghen the market in the US, Studsvik founded the company THOR Treatment Technlogies (TTT) together with Washington Group. To strenghten the market in the UK the company Environmental Remediation Services Ltd was acquired.
In december 2004 Studsvik decides to cease its own reactor operations and initiates collaborations with Institutt for energiteknikk (IFE) in Norway.
In June 2005, the operation of the R2 and R2-0 reactors is ceased and Studsvik Medical AB, the base for Studsvik's BNCT projekt is sold to Hammercap AB.
In 2006 Studsvik acquires the American company RACE LLC with its facility in Memphis, Tennesse. The facility treats low level radioactive waste.