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.