Mr MacKenzie will remain the CEO and managing director of Amcor, with Graeme Liebelt as chairman. The plan will need to be approved by shareholders. The company said it expected the demerger to "enhance shareholder value by enabling each company to better pursue their own growth agendas and strategic priorities". Shares in Amcor were up 29.5 cents, or 2.7 per cent, at $10.88 in morning trade. AAPD made a pre-tax loss of $36.8 million in the first half of the 2012-13 financial year.