Cigna Corp. and Express Scripts today announced that the Department of Justice’s Antitrust Division has cleared their pending merger, terminating the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act. Completion of the transaction remains subject to certain state regulatory approvals and filings, including clearances from certain departments of insurance. Insurance departments in 16 states have cleared the transaction to date. The companies anticipate the deal will close by year-end.