** Regional lender First Foundation's FFWM.N shares jump 11.5% to $6.18 premarket
** FirstSun Capital Bancorp FSUN.O will buy FFWM in a $785 million all-stock deal, the banks announced late on Monday
** FFWM shareholders will receive 0.16083 share of FSUN for each share of First Foundation they own
** Deal set to boost FirstSun’s expansion in southern California and will create a $17 billion bank
** Analysts said FFWM's CEO change last year could make it a potential sale candidate sooner
** As of last close, FFWM stock down 10.6% YTD
(Reporting by Arasu Kannagi Basil in Bengaluru)
((ArasuKannagi.Basil@thomsonreuters.com;))