I dont think you can find out who "owns" that address since there are no other clues on the blockchain. But even if you could, how would that help you gain control over it?  Its obviously not a centralized service or anything like that because the funds are still sitting there. So your only path is to exhaust every possibility on your end: try to find old wallet files, seed phrases, private keys you might have saved. If you cant find those, consider those 4.45 BTC permanently lost.