In 2013, Zuck only earned a buck.

Going by salary at least, Facebook CEO Mark Zuckerberg earned just $1 for the year, according to a regulatory filing released on Monday. In Silicon Valley, though, earning a token salary is a sure sign that you've made it. Other $1-per-year men have included Apple's Steve Jobs and the Google guys — Sergey Brin and Larry Page. Like those tech luminaries, Zuckerberg owns a substantial stake in his company, making a salary irrelevant. Nevertheless, Zuckerberg has collected a decent salary before — in 2012, he made $503,205.

Overall, Zuckerberg made $653,165 last year versus $1.99 million in 2012. The money went largely to fund private planes and his security program, according to the filing.

The 29 year-old Zuckerberg's wealth is estimated at $27 billion. He also owns 61.6% of voting power in the company, giving him carte blanche to forge ahead with deals like the $19 billion pending WhatsApp acquisition and last week's $2 billion proposed takeover of Oculus.

Meanwhile, Facebook COO Sheryl Sandberg made $16.2 million last year compared to $26.2 million in 2012. Facebook CFO David Ebersman earned $10.5 million, VP David Fischer made $8 million and CTO Mike Schroepfer earned $12.6 million.