Australia's Wesfarmers shook up the bidding for Coles Group by taking a stake in the
underperforming retailer, positioning itself for a potential A$20 billion (US$16 billion) takeover.

The Perth-based conglomerate joined forces with Macquarie Bank and buyout firms to emerge as a surprise contender for Coles, which put itself up for sale in February, sources familiar with the situation said.