Colony NorthStar is a diversified equity real estate investment trust (REIT) with an embedded institutional and retail investment management business. It provides global real estate and investment management service. It also provides mezzanine, startups fund, buyout investments and real estate loans. The firm was formed through a tri-party merger between Colony Capital, Inc., NorthStar Asset Management Group Inc. and NorthStar Realty Finance Corporation. It was established in 2017 and is based in San Francisco, California.