Amazon Joins Bidding for Signify

Amazon.com Inc. is among the bidders for healthcare company Signify Health Inc., joining other heavy hitters vying in an auction for the home-health-services provider, according to people familiar with the matter.

Signify is for sale in an auction that could value it at more than $8 billion, the people said. Bids are due around Labor Day, according to the people, but it is always possible an eager bidder could strike a deal before then.