Alibaba said to target global IPO roadshow in September

Managers are set to travel across three continents to hold 100 meetings with potential investors

Two weeks, three continents and 100 meetings. That - and company founder Jack Ma celebrating his 50th birthday on the road - is what it will take for Alibaba Group Holding Ltd to pull off the largest initial public offering in US history.

The Chinese e-commerce company is weighing a plan to start marketing shares to investors on Sept 3, with management traveling across Asia, Europe and the United States before the IPO mid-month, people with knowledge of the matter said.