UDR - Opening Doors to your future | 34,443 followers on LinkedIn. UDR, Inc. (NYSE: UDR), an S&P 500 company, is a leading multifamily real estate investment trust with a demonstrated performance history of delivering superior and dependable returns by successfully managing, buying, selling, developing and redeveloping attractive real estate properties in targeted U.S. markets. As of March 31, 2025, UDR owned or had an ownership position in 60,047 apartment homes, including 300 apartment homes under development.