One large producer acquired 2,000 mt on Monday for October loading and then a further 1,000 mt for August delivery on Thursday.
The trades come as market participants seek to bolster inventories ahead of a series of planned maintenance periods later in the year.
In comparison, July so far has been a relatively quiet month, with lackluster downstream demand and oversupply in Europe.
US imports totaling 81,206 mt arrived in Europe during May, at a time when Shell was undergoing planned maintenance at its Moerdijk unit in the Netherlands.
Platts assessed styrene for loading 5-30 days forward at $949/mt FOB ARA Thursday, down $4/mt on the day on the rolling loading dates in a contango market.
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