Consolidation of managed care businesses has been steady going back to 1994.

Anthem wants Cigna. Humana is courting a buyer. It seems major insurers have the consolidation bug right now. However, according to merger and acquisition trackers Irving Levin Acssociates, consolidation of managed care businesses has been steady going back to 1994.
Here is their data on what the top five insurers have spent on acquisitions of managed care companies.
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