The IPO follows DoorDash raising $400 million in equity capital in June, scoring a valuation of $16 billion. : The San Francisco-based delivery company filed a form S-1 for IPO with the Securities and Exchange Commission on Friday. DoorDash will trade under the symbol "DASH." DoorDash said in the filing that it saw an explosion of business in 2020 with shrinking losses amid the pandemic. In the first nine months of 2020, it generated a $149 million loss on revenue of $1.9 billion, compared to a $667 million loss on $587 million in revenue the year before.