** Shares of investment bank B. Riley Financial RILY.O down 1.2% at $3.3 premarket
** RILY says Scott Yessner to become finance chief, effective June 3
** Yessner will succeed Phillip Ahn as CFO
** RILY said last week it will miss 10-Q filing deadline for quarter ended March 31
** As of last close, RILY has lost ~27% YTD
(Reporting by Pritam Biswas in Bengaluru)
((Pritam.Biswas@thomsonreuters.com))