Root (ROOT) reported Q4 earnings late Wednesday of $1.30 per diluted share, swinging from a loss of $1.64 a year earlier.
Revenue for the quarter ended Dec. 31 was $326.7 million, up from $194.8 million a year earlier.
Analysts surveyed by FactSet expected $291 million.
Shares of the company were up 22% in premarket activity Thursday.