bitcoin.org is owned by bitcoin developers.
bitcoin.com is owned by person/people who provide bitcoin services.
But who owns the "Bitcoin" brand?
Right now, no one owns Bitcoin trademark. Back in 2018 Craig Wright filled application for Bitcoin trademark but he didn't gain it despite the fact that he still tries hardly, a person who was even caught in plagiarism while working on his PHD.
So feel safe, no one will ever own bitcoin trademark.
And bitcoin.org is owned by one man, nickname here - Cøbra. You can check this thread for more details:
https://bitcointalk.org/index.php?topic=5241347Despite the fact that bitcoin.com sounds like to be an official domain or something similar in terms, this website is against bitcoin and promotes BCH, personal business.