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 along with the BNCT facility for treatment of brain tumours. To strengthen the market in the US, Studsvik founded the company THOR Treatment Technlogies (TTT) together with Washington Group. To enter the market in the UK the company Environmental Remediation Services Ltd was acquired.

In December 2004 Studsvik decides to cease its own reactor operations for economic reasons and initiates collaborations with Institutt for Energiteknikk (IFE) in Norway.

In June 2005, the operation of the R2 and R2-0 reactors ceases 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.