John Carreyrou is a member of The Wall Street Journal’s investigative reporting team. He joined the Journal in 1999 and has been based in Brussels, Paris and New York for the paper.

Mr. Carreyrou has covered a number of topics at the Journal, ranging from Islamist terrorism when he was on assignment in Europe, to the pharmaceutical industry. In 2015, he won a Pulitzer Prize for Investigative Reporting with several colleagues for a series of articles exposing fraud and abuse in Medicare, the federal health program for the elderly and disabled. Earlier in his career, he was also part of a Journal team that won a Pulitzer Prize for Explanatory Reporting for its coverage of corporate scandals. His coverage of the Silicon Valley blood-testing company Theranos has won George Polk, Gerald Loeb and Barlett & Steele awards.

Born in New York and raised in Paris, Mr. Carreyrou received a bachelor’s degree from Duke University. He currently resides in Brooklyn with his wife and three children.

Bad Blood: Secrets and Lies in a Silicon Valley Startup was released May 21, 2018. It covers the rise and fall of Theranos, the multibillion-dollar biotech startup headed by Elizabeth Holmes. The book received critical acclaim, winning the 2018 Financial Times and McKinsey Business Book of the Year Award. In 2018 a film version was in production starring Jennifer Lawrence, written by Vanessa Taylor and directed by Adam McKay.