Unlike Ripple, where the pre-mined tokens are held by individuals, the pre-mined stellar tokens are owned by Stellar Development Foundation, a nonprofit corporation.
Here are some quotes, but do check the link bellow too:
"SDF manages the execution of lumen distribution, with oversight and direction provided by SDF’s Expansion Board. The initial lumens held by SDF are required to be distributed to the world in the following manner:
50% for distribution via the Direct Sign-up Program
https://www.reddit.com/r/CryptoCurrency/comments/6bi958/ripp...