The head of discount retail giant Wal-Mart Stores Inc enjoyed a 13 per cent pay rise last year as the firm took the title of the world's biggest company in terms of sales.

Wal-Mart chief executive and president, Lee Scott, received a base salary of $1.1 million in the year to January 31 and saw his bonus climb two per cent to $1.8m.

The Arkansas-based retailer also awarded Scott - who was appointed to the role in early 2000 - $5m worth of restricted stock and options as Wal-Mart enjoyed a 14 per cent jump in total worldwide sales to $218 billion.

The details of Scott's pay and bonuses were revealed in a filing with the US Securities and Exchange Commission.