Today, Facebook reported their Q1 2013 earnings. The company slightly beat revenue expectations with a total of $1.458 billion. In all, revenue was up 38% year-over-year, with ad revenue up 43%.

Alongside the earnings, Facebook also filed with the SEC, and in this filing they announced that their Chief Accounting Officer, David Spillane, would be leaving the company in a couple of weeks. There’s no stated reason for the move.

Spillane first told Facebook of his intent to depart on April 25th, and Facebook says that he will officially leave the company on May 10th. Jas Athwal, Facebook’s revenue controller since 2008, will take his place.

Spillane sold 256,000 shares of Facebook stock last November, and another 60,000 back in January of this year. That still leaves him with around 160,000 shares.

With today’s earnings, Facebook also updated their user stats. Monthly active users have increased to 1.11 billion as of the end of March, which is an increase of 23% year-over-year. Daily active users have also increased, to 665 million, up 26% year-over year.

More importantly, Facebook is growing rapidly when it comes to mobile. At the end of the quarter, mobile MAUs were 751 million, up a whopping 54% year-over-year.

To think about it another way, more than 68% of Facebook users access the site via mobile.