Theranos appears to be running low on cash, and has made a plea to investors to keep the company afloat.
Theranos investors, which include Education Secretary Betsy DeVos, Rupert Murdoch, and billionaire families stand to lose hundreds of millions from their investments in the blood-testing company.
In March, the SEC charged Theranos and its founder Elizabeth Holmes with fraud, alleging they had made false statements and misled investors while raising $700 million.
A number of the big names who invested in Theranos — from Education Secretary Betsy DeVos to Walmart heirs — stand to lose hundreds of millions from their investments.
In December, Theranos said in a letter to investors that it had raised $100 million in secured debt financing from investment firm Fortress Investment Group, with the hope that it would help the company survive through 2018.
Theranos hoped to have an approval for its Zika test by that point.