NEW YORK (AP) - Twitter posted stronger-than-expected results in the fourth quarter, shrinking its losses and nearly doubling revenue as it drew more users and expanded its reach and ad offerings.

NEW YORK (AP) Twitter posted stronger-than-expected results in the fourth quarter, shrinking its losses and nearly doubling revenue as it drew more users and expanded its reach and ad offerings.

Shares jumped over 6 percent in aftermarket trading.

The San Francisco-based short messaging service was still privately held for part of the year-ago quarter it went public in November 2013. For the final three months of 2014 it had losses of $125.4 million, or 20 cents per share, compared with a loss of $511.5 million, or $1.41 per share, a year earlier. Excluding one-time items, Twitter earned $79.3 million, or 12 cents per share double the 6 cents expected by analysts, according to FactSet.

Revenue surged to $479.1 million from $242.7 million, also topping analysts' average estimate of $453.8 million.

Twitter's stock had closed before the report at $41.26, a decline of 37.5 percent over the past year amid concerns about its ability to broaden its audience.