Apple chief executive Steve Jobs underwent a liver transplant operation about two months ago and is expected to return to work by the end of June, The Wall Street Journal reported on Saturday.
Mr Jobs, a pancreatic cancer survivor, went on medical leave in January for an undisclosed condition.
He is seen as the driving force behind development of the iPod, iPhone and other innovative products.
A spokesman for Apple Inc would not confirm the The Wall Street Journal report but said, "Steve continues to look forward to returning to Apple at the end of June and there is nothing further to say."
Analysts have said Wall Street is broadly prepared for Jobs' shift to a role that sees him focusing on big pictures ideas and products at Apple.
Chief operating officer Tim Cook has been managing the company on a day-to-day basis in Mr Jobs' absence, and is expected to continue to do so if Mr Jobs does not return to the role full time, analysts say.
