The stock has gained by about one dollar since the start of the month.
Synlait shares rallied sharply last week after the company said it had reached a settlement over its disputed Pokeno factory site.
The dispute was over historic land covenants at the company's Pokeno site.
The settlement ended several months of uncertainty over the now-completed plant built at Pokeno.
Synlait shares had also firmed on the back of news that it had signed up a new customer, which would put more business through its Pokeno and Auckland plants.
Synlait is 20 per cent owned by its biggest customer, a2 Milk.