Is it true that is royal caribbean and celebrity the same company based on the following text?

Royal Caribbean Cruises Ltd. is an American global cruise company incorporated in Liberia and based in Miami, Florida. It is the world's second-largest cruise line operator, after Carnival Corporation & plc. As of March 2009, Royal Caribbean Cruises Ltd. fully owns three cruise lines: Royal Caribbean International, Celebrity Cruises, and Azamara Club Cruises. They also hold a 67% stake in Silversea Cruises, a 50% stake in TUI Cruises and 49% stakes in Pullmantur Cruises and CDF Croisieres de France. Previously Royal Caribbean Cruises also owned 50% of Island Cruises, but this was sold to TUI Travel PLC in October 2008.
yes