Even with the lack of a profit, Zillow's executives still found reasons to be happy with their firm's financial performance. Executives highlighted strong year-over-year growth in the fourth quarter for Zillow's residential revenue (up 3% annually to $349 million), its rental revenue (up 37% annually to $93 million), and its mortgage revenue (up 22% annually to $22 million). The firm attributed the growth of its mortgage revenue to a 105% annual increase in purchase loan origination volume at Zillow Home Loans to $487 million.