John Carreyrou is a French American journalist. He is most popular for exposing the one-time multibillion-dollar biotech startup Theranos. He was awarded the Gerald Loeb Award for Distinguished Business and Financial Journalism in the category of beat reporting, the George Polk Award for Financial Reporting, and the Barlett & Steele Silver Award for Investigative Business Journalism. He won the Pulitzer Prize twice. Nowadays, he works as an editor at Bloomberg News.