As of April 2015, the medical technology company, Theranos, is a private company that does not have stock that is publicly traded. Theranos does have a partnership with Walgreens, which is publicly traded under WAG on the New York Stock Exchange.
Theranos was founded in 2003 by Elizabeth Holmes when she was 19 years old. The company has developed a blood test that uses a few drops of blood that can be obtained by a fingerstick rather than needles. The nanotainer tube that collects the blood is only 0.508 inches and holds samples 1/1000 the size of a usual blood draw, according to Tech Investing Daily. The tests developed by Theranos can provide results within hours. By partnering with Walgreens, Theranos has been able to open test locations in the United States.