Jobs actually sold himself down to 1 share of Apple soon after NeXT was acquired, which triggered the ouster of Gil Amelio and the appointment of Jobs as interim CEO. The stock that he sold was all given to him by Apple as part of the Next acquisition--he had no stock (aside from perhaps one share, again for sentimental reasons) between when he left Apple and when Next was acquired, and after coming back he only got stock in later years when the board gave him stock and options.
