Do we know who owns certain richlist addresses that are not related to an exchange? is there anyway we could find out?

This particular one would be interesting to know. also has gradual inflow
https://glasschain.org/btc/address/1LdRcdxfbSnmCYYNdeYpUnztiYzVfBEQeC

another rich one is from the bitfinex hack: https://glasschain.org/btc/address/bc1qazcm763858nkj2dj986etajv6wquslv8uxwczt
Are those coins still in control of the hacker?