Early this month, A2 Milk, whose products contain just the a2 beta protein and not the a1 beta protein, poured cold water on expectations that it would soon gain FDA approval.
The company said at the time that there was no certainty as to the outcome of the application or the timing of any approval.
A2 Milk's main infant formula market is China. Analysts have debated whether the ability to send stock to the US would be a help or a hindrance for the former high flier, whose earnings have come under pressure in recent years.
In February, America's biggest infant formula maker, Abbott, recalled product and stopped production at one of its facilities in Michigan after bacteria was found at the site, which led to a national shortage.
The US is still short of infant formula.
A2 Milk's share price has been gaining ground in recent weeks.
The stock last traded at $5.63, up almost a dollar from its late July level.
A2 Milk's result for the June year is expected on August 30.
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