It's typical for unvested RSUs to accelerate and vest on change in control. Based on the 10k, there were about $2.2B worth of unvested RSUs at the start of 2022. Musk's $44 billion likely covered some or all of that (or whatever % vested and/or wasn't already forfeited) so it's unlikely there is any real savings. Unless some of those RSUs converted to Private MuskBucks, then he may be saving something.
coredog64|3 years ago