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A2 Milk says FY revenue grew about 68%

The A2 Milk Company says full-year revenue grew about 68 per cent to around NZ$922 million ($A845.5 million).

The dual-listed New Zealand-based dairy firm says its ratio of underlying earnings to sales for the 12 months to June 30 is expected to be about 30 per cent when it announces its results next month.

The company says the ratio is expected to remain about the same in 2018/19 despite higher expected overhead costs related to a rising headcount for China and its corporate office.

A2 expects to spend a greater portion of its revenue on marketing than in FY18 to continue investing in Australia and to support its expansion in the United States.

The firm announced its expansion into the north east region of the US in January, which it said at the time would increase its products' reach to potentially 5,000 retail stores across the country.

A2 Milk's ASX-listed shares have nearly trebled in value over the past year and were worth $10.82 before the start of trade on Thursday.