Samuel Irving "Si" Newhouse Jr. (born November 8, 1927), is an American heir, business magnate and philanthropist. Together with his brother Donald, he owns Advance Publications, founded by their late father in 1922, whose properties include Condé Nast (publisher of such magazines as Vogue, Vanity Fair, The New Yorker, etc.), dozens of newspapers across the United States (including The Star-Ledger, The Plain Dealer, The Oregonian, etc.), former cable company Bright House Networks and a controlling stake in Discovery Communications.
He is the son of Mitzi (Nee Epstein) and Samuel Irving Newhouse Sr., the founder of Advance Publications. His grandson, S. I. Newhouse IV, appeared in the documentary Born Rich. Newhouse attended the Horace Mann School in New York City. He has an estimated net worth of $9.5 billion, and he was ranked the 46th richest American by Forbes magazine in 2014. He resides in New York City with his wife.
Newhouse has given money to charity, including $15 million to Syracuse University. He is also an art collector who at one time owned one of the most valuable paintings in the world, a Jackson Pollock drip painting, titled No. 5, 1948. Newhouse was listed by Art News as among the top 200 art collectors in the world.