From Apple’s 2012 Proxy SEC filing Statement:

In 2011, Mr. Jobs’s compensation consisted of a $1 annual salary. As of the end of 2011, Mr. Jobs owned approximately 5.5 million shares of the Company’s common stock. Since rejoining the Company in 1997, Mr. Jobs had not sold any of his shares of the Company’s stock. Mr. Jobs held no unvested equity awards. The Company recognized that Mr. Jobs’s level of stock ownership significantly aligned his interests with shareholders’ interests.

As Dustin Curtis points out, Jobs really did believe in what Apple was doing, and was willing to bet on it, big time.

via MG Siegler