Holmes was convicted on charges of defrauding three other investors, as well as conspiring to do so. She was acquitted on three counts of defrauding patients who paid for tests from Theranos and a related conspiracy charge. The jury could not reach a decision on three counts related to individual investors.
Holmes, wearing a gray suit jacket, appeared poised after the verdict was read. A sentencing date was not immediately set.
Prosecutors said Holmes, 37, swindled private investors between 2010 and 2015 by convincing them that Theranos' small machines could run a range of tests with a few drops of blood from a finger prick.
U.S. Attorney Stephanie Hinds released a statement following the verdict that said, "The guilty verdicts, in this case, reflect Ms. Holme's culpability in this large scale investor fraud and she must now face sentencing for her crimes."