** U.S.-listed shares of Verona Pharma VRNA.O I9SAy.F rise 18.8% to $103.16 premarket
** Merck MRK.N is nearing a deal worth about $10 billion to buy Verona, Financial Times reports
** Merck will pay $107 per American depository share for Verona, the report says, citing three people familiar with the matter
** The reported purchase price will be at a premium of about 23% to Verona ADS' last close
** Up to last close, stock up 87% YTD
(Reporting by Christy Santhosh)
((Christy.Santhosh@thomsonreuters.com))