July 7 : Australia's WiseTech Global said on Tuesday that co-founder Richard White would step down as executive chair, effective immediately, while Raelene Murphy had been appointed independent chair.Murphy, who joined the logistics software provider's board at the start of the year, was named lead independent director in May before taking on her new role.Shares of WiseTech were up as much as 10.6 per cent at A$39.12, as of 0028 GMT, hitting their highest level since June 15. The stock is the top performer in the benchmark S&P/ASX 200 index."Recent personal media attention is creating an unnecessary distraction from the strength of WiseTech's business," White said, adding that he "strenuously and unequivocally" denies recent media allegations. In late June, media reports said the Australia