KUALA LUMPUR (June 22): Chemical firm Hextar Global Bhd's executive director Datuk Ong Choo Meng and his 90%-held Hextar Rubber Sdn Bhd have acquired an additional 20.63% stake in Rubberex, raising their collective interest to 50.18% – above the 33% threshold that triggers the mandatory general offer for the remainder shares they do not own in the company.