The St. Regis in Washington, DC is owned by the Al Rayyan Tourism Investment Company who also owns one of the Four Seasons properties in Cario (First Residence), St. Regis Bal Harbour, the W Miami, as well as some other properties I'm not familiar with. The majority of their portfolio is in the Middle East. The company is, in turn, a wholly owned subsidiary of Sheikh Faisal Bin Qassim Al Thani's holding company.