The 25 Most Valuable American Startups That Died In 2018

  • This year’s biggest startup flameout was Theranos, the embattled medical technology company that raised almost $1 billion in its lifetime.
  • Using data from PitchBook, these are the 25 most valuable American startups that died in 2018.

Having millions of dollars in backing from venture capitalists doesn’t guarantee the longevity of a startup.

Even well-established private companies are at constant risk of failure, as evidenced by some of the startups that went out of business this year. PitchBook compiled data on the 25 most valuable startups that failed in 2018; three of these companies have been around for more than 20 years and were still forced to shutter.

Startups in the healthcare industry took a big hit – seven companies on the list are in the medical sector.

The list is headed by Theranos, the blood-testing company, whose $9 billion valuation was greater than those of all the other startups on the list combined. It ultimately flamed out after a series of Wall Street Journal reports raised serious questions about its technology.

Here are the 25 most valuable VC-backed startups that failed in 2018:

Prev1 of 13Next