Hedge fund Elliott Investment Management has built a stake of more than 1.5billioninHewlettPackardEnterprise,apersonfamiliarwiththemattersaidonTuesday.Elliott,oneoftheworld’sbiggestactivistinvestors,nowranksamongtheinformationtechnologycompany’sbiggestinvestorsandplanstoengagewithmanagement,saidthepersonwhowasnotpermittedtodiscussthecampaignpublicly.Detailsofwhat Elliott maybepushingHPE,whichisvaluedat20 billion, to do could not be immediately dete ...