Companies based in Princeton, New Jersey

Berlitz Corporation is a language education and leadership training company which is based in Princeton, New Jersey. The company was founded in 1878 by Maximilian Berlitz in Providence, Rhode Island in the United States. Berlitz Corporation is owned by Berlitz Holdings, a company established through a 100% investment by ILSC Holdings LP (which owns ILSC Education Group, a company engaged in language education businesses such as study abroad), with more than 547 company-owned and franchised locations in more than 70 countries.

Nassau Broadcasting Partners LP was a company based in Princeton, New Jersey that owned radio stations in New England and the Mid-Atlantic United States. Nassau's stations, which included both AM and FM frequencies, were located in Maryland, New Jersey, and Pennsylvania. The company was owned and headed by Louis F. Mercatanti. Nassau was predominantly an operator of radio stations in medium and small markets. Nassau formerly owned radio station WCRB in Waltham, a Boston suburb, and located in the Boston market, the 11th largest radio market in the US, according to BIA Financial Network. However that station was sold to WGBH in 2009. Nassau operated radio stations in substantially all of the major formats. The company's most common format was classic rock/classic hits. On October 13, 2011 Nassau Broadcasting entered Chapter 11 bankruptcy protection after their senior lenders petitioned for an involuntary Chapter 7 liquidation in September. The stations were auctioned to various bidders in May 2012 subject to bankruptcy judge and FCC approval. Nassau's last station, WPLY in Mount Pocono, Pennsylvania, lost its license in 2014 after having shut down in 2011.

Miami International Holdings, Inc. (MIH), trading as MIAX, is an American company formed in 2007 that operates global financial exchanges and execution services.

Coforge, formerly known as NIIT Technologies, is an Indian multinational information technology company based in Noida, India and New Jersey, United States. The company's stock trades on the Bombay Stock Exchange and on the National Stock Exchange of India under the ticker symbol COFORGE.

Heartland Payment Systems, Inc. is a U.S.-based payment processing and technology provider. Founded in 1997, Heartland Payment Systems' last headquarters were in Princeton, New Jersey. The company was acquired by Global Payments for $4.3 billion in 2016.

Applied Logic Corporation (AL/COM) was a time-sharing company in the 1960s and 70s.

Pharmasset Inc. was a pharmaceutical company based in Princeton, New Jersey in the United States. The company develops antiviral drugs for HIV (including racivir), hepatitis B (including clevudine, marketed as Levovir), and hepatitis C. In November 2011, Pharmasset was acquired by Gilead for $11.2 billion.

ST Robotics is a company based in Cambridge, England, and Princeton, New Jersey, United States. The company designs and manufactures low-cost bench-top industrial robot arms and purpose built Cartesian robots. The company has no sales force and sells their robotic arm products mainly through the Internet as "boxed robots" with distributors around the world.

MediGuard.org, operated by iGuard Inc., monitors the safety of prescribed medicines, over-the-counter medicines and healthcare supplements. As of February 2011, there are over 2,480,000 registered users in the website. The company also rates the safety of different drugs using a standardized ratings scale, and has received support from advocacy groups concerned with drug adverse effects.

Medarex was an American biopharmaceutical company based in Princeton, New Jersey, with manufacturing facilities in Bloomsbury and Annandale, New Jersey, and research facilities in Milpitas and Sunnyvale, California. In 2009, Medarex was purchased by Bristol Myers Squibb.