DoorDash Inc. unveiled paperwork for its initial public offering on Friday, showing the food-delivery service has grown at a blistering pace during the pandemic and turned a surprising quarterly profit in June before falling back to a loss in September.
The company’s revenue for the September quarter more than tripled from the same period a year earlier. Like many startups that give priority to growth, DoorDash still mostly loses money as it spends heavily on sales and marketing. It hasn’t posted a full-year profit since its…