60% of the shares are locked for one year—there’s something interesting about SpaceX’s IPO structure, and with Musk leading the lock-up, it shows a clear stance.

SpaceX's updated prospectus states that the IPO will reserve up to 5% of Class A common shares for subscription by certain employees and executives' friends and family; participants in the friends and family list were previously not subject to lock-up restrictions. The company also disclosed that over 60% of the issued shares, including Musk's holdings, will be subject to a 366-day lock-up period, and Musk has also agreed to this lock-up arrangement.