Robinhood Markets (HOOD) reported Q1 earnings late Wednesday of $0.37 per diluted share, up from $0.18 a year earlier.
Analysts polled by FactSet expected $0.33.
Revenue in the three months ended March 31 rose to $927 million from $618 million a year earlier.
Analysts surveyed by FactSet expected $920.1 million.
The company increased its share repurchase authorization by $500 million to $1.5 billion.
Robinhood shares fell 2% in after-hours trading.