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Forbes Revises Net Worth Of Theranos Founder Elizabeth Holmes From $4.5 Billion To $0

LOS ANGELES (CBSLA.com/AP) — Forbes has revised the net worth of the woman it crowned America's richest self-made woman last year from $4.5 billion to nothing.

Forbes says its estimate of Elizabeth Holmes' wealth is based entirely on her 50 percent stake in troubled blood-testing startup Theranos. The company acknowledged in April that it's under investigation by several regulators and agencies following a series of reports by The Wall Street Journal in which former employees said the company's tests were unreliable. The tests use only a few drops of blood.

Theranos said the articles were inaccurate when they were published.

Forbes says its previous estimate of her wealth came from a $9 billion valuation for the company in 2014.

The 32-year-old Holmes started Palo Alto, California-based Theranos in 2003 and remains its CEO.

Theranos responded to the report Wednesday, saying Forbes' estimate is flawed.

"As a privately held company, we declined to share confidential information with Forbes. As a result, the article was based exclusively on speculation and press reports," Theranos spokeswoman Brooke Buchanan told Time, in a statement.

(TM and © Copyright 2016 CBS Local Media, a division of CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2015 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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