I've been on this platform for a while now but I can't actually tell who is the owner this forum. I don't also know who controls the activities that happen here.
Please I want to clear my curiosity,
What particular sort of activities you are talking about here? Like if we say about any changes to the forum then it's handled by @theymos and appointment of moderators/merit sources is also his task as he is the administrator of the forum.
So he is the main person on the forum if you are looking for such information but if you see post deleted or any moderation work then it's the job of moderator who you can see under each board where they have been appointed so as to reduce the spam on forum.
Then there are global moderator like
@mprep who handles bans on the forum and other works but if you ask for the main person then it's @theymos.
Although Bitcointalk is created by Satoshi, I think he doesn't have any access anymore considering he's already leave this forum since long time ago.
His account was locked by @theymos back in the days so as to avoid any other person abusing the account and the username satoshi is also not allowed to be used on forum with some other keywords as well by him.