Dan David is an American investor, activist short-seller and whistle-blower. He is the founder of New York-based Wolfpack Research, a financial research and due diligence investigation firm that was started in 2019 with support from short-seller Muddy Waters Research. In the fall of 2017, David and his work as a whistle-blower and China expert were the focus of the documentary film The China Hustle, which depicts how fraudulent Chinese companies stole billions of dollars from U.S. investors and retirees. In 2018, David was the Republican candidate for congress in Pennsylvania's 4th Congressional District, which includes Montgomery and Berks counties. He is the host of the "I Hung Up On Warren Buffett" podcast.