Equity Commonwealth announced that Sam Zell, its Chairman of the Board of Trustees, died on May 18, 2023 due to complications from a recent illness. Sam served as Chairman since took responsibility for EQC in May 2014. Sam also served as the chairman of Equity Group Investments, the private investment firm he founded more than 50 years ago, and chaired two other companies listed on the New York Stock Exchange: Equity Residential and Equity LifeStyle Properties.