Microsoft, AmEx Said to Compete for Foursquare Stake

Microsoft Corp. and American Express Co. are vying to take an equity stake in Foursquare Labs Inc., according to people with knowledge of the discussions.

The two companies are competing to invest in Foursquare rather than cooperating on a joint bid, said one of the people, who asked not to be identified because the information isn’t public. Foursquare is talking with other companies about a possible investment, and the talks may not lead to a deal, said another person with knowledge of the matter.