This information is derived from the State Department's Office of Investment Affairs' 2015 Investment Climate Statement. Any questions on the ICS can be directed to EB-ICS-DL@state.gov
Last Published: 6/15/2016
There are no limits on foreign ownership or control except for activities customarily reserved for the state (military and paramilitary activities and the operation of the Central Bank).

Foreigners are free to establish and own business enterprises and engage in all forms of business activity in STP, with the exception of the military sector.  Prohibitions exist in the ownership of certain types of guns.  In addition, the form of public participation (percentage of government ownership in joint ventures) varies with each agreement.
 
STP is gradually moving towards open competition in all sectors of the economy, and competitive equality is the official standard applied to private enterprises in competition with public enterprises with respect to access to markets, credit, and other business operations.  The government has eliminated former public monopolies in farming, banking, insurance, airline services, telecommunications, and trade (export and import).

Prepared by our U.S. Embassies abroad. With its network of 108 offices across the United States and in more than 75 countries, the U.S. Commercial Service of the U.S. Department of Commerce utilizes its global presence and international marketing expertise to help U.S. companies sell their products and services worldwide. Locate the U.S. Commercial Service trade specialist in the U.S. nearest you by visiting http://export.gov/usoffices.