Walgreen to vote on merger with Alliance Boots

Walgreen could become the world's largest prescription drug purchaser, if a merger with Alliance Boots is completed next week. The drug chain's shareholders are slated to vote on a complete merger with the UK drug store chain, in which Walgreen bought a 45% stake in 2012, The Wall Street Journal reports.

Walgreen in August decided against an inversion move despite investor pressure to relocate headquarters in the UK.