The French teenager's future has long been a source of speculation and Marotta has stated that discussions are in an advanced stage, seemingly closing the door on the youngster extending his deal with the Premier League team.
"We have lured [Pogba] away from Manchester United," he told Corriere dello Sport. "We respected the rules.
"Pogba, for his own reasons, didn't intend to renew [his contract with United]. We informed the club and we are now waitinig for an answer. Talks are well advanced."
Moratta also played down reports that Juventus were interested in signing Manchester City striker Mario Balotelli and Napoli's Edinson Cavani.
He added: "We have never thought about Balotelli. He doesn't fit the profile we are looking at, a profile which isn't based solely on technical ability.
"Cavani? You always have to consider the wishes of the clubs which own the players."