| The deal closed two days after New Jersey state regulators gave the companies final approval, and less than a week after California and New York signed off as well.  | The Philadelphia-based insurer and St. Louis-based PBM announced last spring that they would pursue a merger. They secured shareholder approval in August.
| | A parallel deal between CVS Health and Aetna closed last month but has since encountered uncertainty in a federal courtroom.
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Cigna and Express Scripts produced strong financials throughout 2018, and survived a brief opposition effort by activist Cigna shareholder Carl Icahn. Read the full story. | 
