Byron Wien

|birth_place = Chicago, Illinois, U.S. |death_date = |death_place = Southampton, New York, U.S. |occupation = |spouse = |alma_mater = Harvard University (BA, MBA) }} Byron Richard Wien (; February 14, 1933 – October 25, 2023) was an American investor. After a long career as an executive at Morgan Stanley, he became vice chairman of Blackstone Advisory Partners, a subsidiary of The Blackstone Group. He was regarded as one of Wall Street's most prominent market strategists.

Wien's memoir, which he co-authored with former Blackstone colleague Taylor Becker, was published posthumously on November 12, 2024. Provided by Wikipedia