
As of Wednesday, DoorDash had gained 55% since its debut last week. It fell as much as 5.1% on Thursday. DoorDash declined to comment.
The market debut of DoorDash was one of the most anticipated of 2020, already a banner year for startups going public. Back in June, private investors had valued the San Francisco-based company at $16 billion. When it opened for trading on Dec. 9, its fully diluted value topped $68 billion.
DoorDash, the largest food delivery app in the U.S., faces strong competition, notably from Uber and Grubhub. Uber tried to acquire Grubhub this year, until Just Eat Takeaway.com NV intervened. Uber bought Postmates instead.
Now DoorDash is eyeing delivery beyond just meals. The company started ferrying around convenience store items such as toilet paper this spring, which puts it in closer competition with giants such as Amazon.com Inc.

A DoorDash Inc. delivery person carries an order bag outside of a DoorDash Kitchens location in Redwood City, California, U.S., on Friday, Nov. 29, 2019. Doordash, an on-demand food delivery service, unveiled their first shared commissary kitchen concept that can house up to five restaurants, offering a cost-saving alternative to traditional brick and mortar locations. Photographer: David Paul Morris/Bloomberg