David Gold has been a loyal fan of West Ham since childhood. He played a key part in the takeover of the club in 2010 alongside co-owner David Sullivan.
He also spent 12 years as chairman of Birmingham City before selling his shares in 2009.
The West Ham website said: “We are deeply saddened to confirm that The team’s beloved co-owner David Gold has passed away after a short illness.
David Gold, 86, passed away peacefully surrounded by devoted daughters Jacqueline and Vanessa, and fiancee Lesley.
After making a career as a successful businessman, his life came to an end in January 2010 when he became a co-owner of West Ham.
The successful takeover helps stabilize the club and protects West Hem’s future during a period of financial uncertainty.”

West Ham owner passed away.
West Ham co-owner David Sullivan said: “On behalf of everyone at the club, we are saddened and saddened by the passing of our colleague and friend, David Gold.
He always wanted the best for West Ham United, and his departure is a great loss for all of us.”
Xiao Lam | 22:50 04/01/2023