Avance Gas founder Stolt-Nielsen Gas (SNG) has sold all its shares in the company for $25.9m.
The deal, carried out during the fourth quarter but revealed on Thursday, has netted the Norwegian company a profit of $10.8m, parent Stolt-Nielsen said.
"The holding in Avance no longer made sense for our long-term strategy," a spokeswoman for the group told TradeWinds.