About one-third of those users, 36 million, have accessed the service on a monthly basis.
Along with its user base, the company has also increased its market share. At the end of 2010, it had about a 2.3% share of all radio listening in the United States. According to its SEC filings, there were about 80 million registered users at that time. Now Pandora accounts for 3.6% of all radio listening in the U.S.
The company made the announcements at its first Financial Analyst Day Tuesday, where it also announced a redesign of its site.
Shares closed on Monday at $19.26 — nowhere near what prices reached in a surge after Pandora went public, but above the initial pricing of $16.