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That's not all that surprising given that Glassdoor crowned Zuckerberg as the highest-rated chief executive of 2013.
But that changed this year.
Glassdoor just released its annual ranking of the 50 highest rated CEOs.
Zuckerberg dropped down to No. 9 overall, with a 93% approval rating, down 6 percentage points from last year.
Out of all the industries featured on the list, the tech industry had the most representation with 14 CEOs.
Disclosure: Jeff Bezos is an investor in Business Insider through his personal investment company Bezos Expeditions.