(Updates)
** Shares of drug developer Gritstone bio GRTS.O fall 37%
to 13 cents premarket
** Company files for Chapter 11 bankruptcy
** GRTS lists both estimated assets and liabilities at $100
million to $500 million - court filing
** "During its financial restructuring process, Gritstone
intends to operate in the ordinary course and remains committed
to advancing its clinical programs" - company
** On Oct. 1, GRTS shares closed 62.1% lower after it
reported mixed interim data from a mid-stage study of its
experimental vaccine for colorectal cancer patients
** Up to last close, stock down 90.3% YTD
(Reporting by Puyaan Singh)
((Puyaan.Singh@thomsonreuters.com;))