Not pre mined, but check out the distribution curve. Lots of coin for early miners.
Discussion
Isn't that also the case for bitcoin?
Monero was much steeper
This is true it was steeper, but also not as crucial as Bitcoin because of tail emission.
It's also unlikely those early miners just held onto it this whole time. Most traded or sold long ago. Whichever early miners held took on great risk to do so. They deserve any potential gains they made.