Vivek Ganapathy Ramaswamy is an American entrepreneur and politician. He founded Roivant Sciences, a pharmaceutical company, in 2014. In February 2023, Ramaswamy declared his candidacy for the Republican Party nomination in the 2024 United States presidential election. He suspended his campaign in January 2024, after finishing fourth in the Iowa caucuses, and he proceeded to endorse Trump's candidacy. In February 2025, Ramaswamy filed to enter the 2026 Ohio gubernatorial election.

Ramaswamy was born in Cincinnati to Indian immigrant parents. He graduated from Harvard University with a bachelor's degree in biology and later earned a degree from Yale Law School. Ramaswamy worked as an investment partner at a hedge fund before founding Roivant Sciences. He also co-founded an investment firm, Strive Asset Management.

Ramaswamy has stated that he sees the United States in the middle of a national identity crisis precipitated by what he calls "new secular religions like COVID-ism, climate-ism, and gender ideology". He is also a critic of environmental, social, and corporate governance initiatives. In January 2024, Forbes estimated Ramaswamy's net worth at more than $960 million; his wealth comes from biotech and financial businesses.

In 2007, Ramaswamy and Travis May co-founded Campus Venture Network, which published a private social networking website for university students who aspired to launch a business. The company was sold to the nonprofit Ewing Marion Kauffman Foundation in 2009.

Ramaswamy worked at the hedge fund QVT Financial from 2007 to 2014. He was a partner and co-managed the firm's biotech portfolio. QVT's biotech investments under Ramaswamy included stakes in Palatin Technologies, Concert Pharmaceuticals, Pharmassetand Martin Shkreli's Retrophin. In a 2023 speech and in his book Woke Inc., Ramaswamy called Shkreli, whose company had greatly increased the cost of a life-saving drug, both "brilliant" and a pathological liar. He criticized the U.S. Department of Justice for prosecuting Shkreli, calling his fraud a victimless crime