Carvana is staking its claim to two milestones: the fastest used-car retailer to organically sell more than 400,000 units in a year and the fastest online auto retailer to have reached 1 million sales since founding (nine years).

The company said it reached each of these landmarks in the fourth quarter.

“Our engine of growth is fueled by amazing and ambitious people who all share the same values and commitment to our customers, who bring boundless energy and discipline, who feel like they're part of something, who have chosen to care a little more than most, who learn and get a little better every day, and who have fun along the way,” Carvana founder and chief executive officer Ernie Garcia said in a news release.

“While there’s so much to look forward to and we’re just getting started, I’m incredibly proud of our team that has helped refine, simplify, and improve the car buying experience for a million people and counting across the U.S.,” he said.

And online used-car retailers like Carvana and rival Vroom are gaining traction from a consumer popularity standpoint, according to recent data in the 2021 Car Buyer Journey Study from Cox Automotive.

There was a 9% increase in the number of used-car buyers browsing the websites of what Cox Automotive has dubbed “New Form Online Retailers.” What’s more, there was a 4% uptick in the number of new-car buyers browsing those same sites, which just sell used cars.

“As new-vehicle inventory became more expensive and harder to find, buyers turned to the used-vehicle market and searched the sites of these online retailers for used-vehicle inventory,” Cox Automotive said in a news release.