** U.S.-listed shares of drugmaker Amryt Pharma plc AMYT.O
surge 108.6% to more than 1-1/2-year high of $14.6
** Stock set for its biggest ever one-day rise, if gains
hold
** Italy's Chiesi Farmaceutici said on Sunday it will
acquire drugmaker Amryt Plc AMYT.L in a deal valued at $1.48
bln
** Amryt shareholders will receive $14.50 per American
Depositary Share (ADS) in cash upfront
** Shareholders to also receive contingent value rights
(CVR) of up to an additional $2.50 per ADS based on achievement
of certain milestones by Filsuvez, a drug approved in Europe for
an inherited skin disease called epidermolysis bullosa
** The deal represents a 107% premium to Amryt ADS' closing
price on Jan 6
** CVR refers to a right often granted to shareholders of a
company facing restructuring or a buyout
** Stock lost ~33% last year
(Reporting by Sriparna Roy)
((Sriparna.Roy@thomsonreuters.com;))