No need for a private message and it is not a mystery. For example I am staying at the Curacao Marriott next week. I type "Curacao Marriott ownership" into google and find that it is owned by a subsidiary of Marriott International called Marriott Curacao N.V.

I am staying at the Portland Marriott City Center after that, I find thaat it was opened by a company called Lodgian which has apparently gone out of business and is now owned and operated by a comapny called Sunstone. I also in the same search see ownership info on the Courtyard City Center in Portland.