For Q4, Facebook reported revenue of $1.59B and earnings of 17 cents per share, above expectations. Press release here, notes below.

· Mobile accounted for 23% of ad revenue, up from 14% in Q3.

· Overall ad revenue was $1.33B, up 41% YoY.

· 1.06B monthly active users at the end of December.

· Mobile DAUs exceeded web DAUs for the first time in the fourth quarter of 2012.