** Shares of Seagen SGEN.O rise 3.3% to $228.8 premarket
** Pfizer PFE.N says it has received all regulatory
approvals to close its $43 bln acquisition of SGEN on Thursday
** U.S. FTC sent the cos a request for more information on
the deal in July after PFE agreed to buy SGEN and its cancer
therapies in March
** PFE says it has agreed to donate rights of royalties
from sales of cancer drug Bavencio to address concerns from U.S.
FTC
** Shares of PFE marginally up in premarket trade
** SGEN's stock up 72.4% YTD until last close
(Reporting by Puyaan Singh)
((Puyaan.Singh@thomsonreuters.com;))