** Shares of Restaurant chain Bloomin' Brands BLMN.O
advance 8.7% to $27.84 premarket
** Wall Street Journal reports activist investor Starboard
Value builds more than 5% stake in co
** Starboard to now be among co's top-five shareholders -
report
** WSJ adds, Starboard targets cos that could benefit from
operational and financial improvements/attractive takeover
targets
** As of last close, co's price-to-earnings ratio was at
8.75x its forward earnings multiple vs industry median of 14.45x
** Up to last close, stock has risen 27% YTD
(Reporting by Johann M Cherian in Bengaluru)
((johann.mcherian@thomsonreuters.com;))