** Community lender Lakeside Bancshares' LKSB.PK shares jump 47% to $18.75
** Catalyst Bancorp CLST.O will buy rival LKSB in a $41.1 million cash deal, the banks announced late Wednesday
** CLST shares fall 6.3% to $16.02
** LKSB shareholders will receive $19.58 per share, representing 53.7% upside to stock's last close
** Deal more than doubles the size of CLST and expected to close in Q3 2026
** Transaction expected to boost CLST profit by 180% once cost savings are fully realized
** As of last close, LKSB up 15.9% while CLST up 8.6% YTD
(Reporting by Arasu Kannagi Basil in Bengaluru)
((ArasuKannagi.Basil@thomsonreuters.com;))