Iranian Entity: Mohandesi Toseh Sokht Atomi Company, Ltd.

- Engineering of Expansion of Nuclear Fuel Company, Ltd.
- MATSA

Alvand Avenue, 37th Street, Number 27, Tehran, Iran (according to the NCRI)

Contracted to Kalaye Electric Company to provide nuclear fuel cycle design and engineering services, and has procured equipment for the Natanz uranium enrichment site; listed by the European Union on December 1, 2011 as an entity linked to Iran's proliferation-sensitive nuclear activities or Iran's development of nuclear weapon delivery systems; with some exceptions, European Union member states must freeze all funds and economic resources owned, held or controlled by the listed entity, and prevent funds or economic resources from being made available to it; sanctioned by the governments of South Korea, Switzerland, and Norway, restricting business and financial transactions with the entity and/or freezing its assets in those countries.

Maintains a factory at the Arak nuclear site, according to the National Council of Resistance of Iran; managing director is Mohammad Mohammadi, who was also listed by the European Union on December 1, 2011 as an entity involved in nuclear or ballistic missile activities.