The company's share of the U.S. ride-hailing market was 39 percent in December 2018, up from 22 percent in December 2016, according to its filing. The $2.2 billion in revenue for 2018 was about double what it brought in the previous year. Bookings, which represent Lyft's fares after subtracting taxes, tolls and tips, have been rising dramatically — a trend that the company intends to highlight to potential investors. Lyft's bookings surpassed $8 billion last year, 76 percent more than in 2017 and more than four times the number from 2016. Lyft's recent market-share gains came as Uber was dogged by reports that drivers accosted passengers and that the company tolerated rampant sexual harassment internally. Those problems ultimately led its co-founder Travis Kalanick to resign. Uber has been working to repair its image under CEO Dara Khosrowshahi. Lyft said it would offer 30,700,000 shares of its common stock to the public and give underwriters the option to buy up to 4,615,500 mores shares.