Papa John's up after report on activist investor stake
** Papa John's PZZA.O up 2.2% at $41.60 ** Activist investor Irenic Capital Management built a stake in PZZA in Q3, Reuters reports; size of stake not known ** Irenic declined to comment, while PZZA did not respond to request for comment ** Apollo Global APO.N recently withdrew an offer to take PZZA private at $64 a share ** PZZA has fallen 1% YTD, as of last close (Reporting by Juby Babu in Mexico City) ((Juby.Babu@thomsonreuters.com;))