A former top fund-raiser for Donald Trump, Barrack on Wednesday requested and received a modification of his bail conditions.
Ark increased the pace of buying as the stock fell 3.4% after the trading platform said it had suffered a data security breach.
Last week, the head of the US Federal Reserve had the sensitive task of announcing the central bank is rolling back its bond-purchasing program.
Holmes is accused of raising more than $700 million by lying about the capability of Theranos technology.