** Drug developer Allakos Inc's ALLK.O shares drop 21.5%
to $3.64 - biggest pct loser across U.S. stock exchanges
premarket
** Co says its drug candidate to treat patients with an
inflammatory disease in the digestive system demonstrates mixed
results in a late-stage study urn:newsml:reuters.com:*:nGNX4KKpyR
** Trial meets co-primary goal of improvement in tissue
specimen following biopsy, another main goal of improvement in
symptoms was not statistically significant - co
** Co is currently not planning to conduct additional
studies
** Up to Thursday's close, stock down ~53% YTD
(Reporting by Khushi Mandowara)
((Khushi.Mandowara@thomsonreuters.com;))