** Shares of Kelsian rise as much as 3.6% to A$4.270; their biggest intraday pct gain since Oct. 9

** Transport co's unit renews a 10-year contract with Jersey Island's Department of Infrastructure and Environment to operate and maintain all its public bus services

** Says contract will secure an estimated A$260 mln ($172.5 mln) in revenue over the 10-year term

** Stock extends gains to third straight session, trimming YTD losses to ~39%

($1 = A$1.5065)

(Reporting by Adwitiya Srivastava in Bengaluru)

((Adwitiya.Srivastava@thomsonreuters.com;))