In July of 2015, just weeks apart, four of the top five insurance companies in the nation announced that they would be merging with one of their big competitors: Aetna made an offer to acquire Humana for $37 billion and, in an even bigger deal, Anthem offered to purchase rival Cigna for $48 billion. Now, just a year-and-a-half later, following two adverse court decisions, both of those deals are dead.
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