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A2 Milk marketing exec to step down

A2 Milk says global chief marketing officer Susan Massasso is stepping down in February

A2 Milk says global chief marketing officer Susan Massasso will quit her role at the end of February.

The milk processor and supplier did not give a reason for Ms Massasso's departure after six years with the company, but said she would stay with A2 until the end of the financial year and subsequently be available as a consultant.

A2's ASX-listed shares rose as much as 68 per cent this year on the back of its expansion into China, before giving up the majority of those gains to sit at $11.76 ahead of Wednesday's open - up 14 per cent for 2019.