Twitter (TWTR) earned $0.12 per share in the fourth quarter, beating analysts' estimate of $0.06. Revenue in the fourth quarter increased 97.5% year-over-year to $479.1 million, exceeding analysts' estimate of $453.79 million.

The company released its forecasts for the first quarter 2015 and full year 2015. Revenue is expected to be $440-$450 million in the first quarter (analysts' estimate: $446.74 million). Revenue in 2015 is expected to be $2.3-$2.35 billion (analysts' estimate: $2.26 billion).

The company also announced that it had 288 million active users per month in the fourth quarter, missing analysts' estimate of 295 million users, but beating the third quarter figure of 284 million users.

Twitter (TWTR) shares increased to $46.10 (+11.73%) prior to the opening bell.