The company and analysts had expected flat earnings growth or a profit of up to 3 cents during the quarter, and investors punished Pandora in after-hours trading. Shares were off $2.92 to $25.80, or 10.17 percent, at 6 p.m. ET as the company ended its conference call discussing the earnings.
The company continues to face competition from other online radio providers, such as fast-growing iHeartRadio, as well as burgeoning interest in music subscription services such as Spotify that allow users to choose individual songs or listen to online radio stations and playlists. But Pandora's brand has proven resilient, especially as other tech giants have edged into online radio and unveiled new products as well. Apple introduced iTunes Radio last year, while Google has delayed the launch of a service based on YouTube to complement its Google Play service.
Pandora beat its own revenue estimate of $213 million to $218 million for the quarter, and expects to outdo itself during the year's second half as well. The company raised its full-year revenue guidance upward by $15 million to a range of $895 million to $915 million.
Along with its financials, Pandora released statistics showing 5.04 billion listener hours during the second quarter, about 29 percent more than the 3.91 billion in the same period last year and 5 percent more than the 4.8 billion during 2014's first quarter.
Among its more than 250 million registered accounts, Pandora counted 76.4 million active users as of June, just off from a May peak of 77 million. The company also claims a 77.6 percent share of Internet radio and an 8.9 percent share of all U.S. radio-listening time in June, also just below an April peak of 9.28 percent. During the call, CEO Brian McAndrews called June "a traditional low point" in the annual listening cycle.
The company's content acquisition costs dipped to 50.9 percent of overall revenue, markedly less than the 62.6 percent it paid during last year's second quarter and the 53.8 percent it paid during the full year of 2013. Both McAndrews and chief financial officer Mike Herring noted during the conference call that the company has paid out $1 billion in royalties during its lifespan thus far and topped $100 million for the second consecutive quarter.
One of Pandora's measures of financial performance is revenue per thousand listener hours. Ad sales generated $62.4 in so-called RPMs on traditional computers, while mobile and tablet RPMs reached $36. Combined advertising RPMs were $40.11 during the quarter, up 5.9 percent over the same period in 2013.