PTT Global Chemical Public Company Limited (SET:PTTGC) agreed to acquire Piperack ownership from Vinythai Public Company Limited (SET:VNT) for THB 8.7 million on February 23, 2018. The transaction is approved by the board of directors of Vinythai Public Company Limited in the board meeting held on February 23, 2018.

PTT Global Chemical Public Company Limited (SET:PTTGC) cancelled the acquisition of Piperack ownership from Vinythai Public Company Limited (SET:VNT) on February 23, 2019.