The healthcare company put merger rumors to bed.Shares of Cigna Group (CI 7.62%), the healthcare company, were rising today after the company announced in a press release that it's not pursuing a merger with one of its competitors, Humana.Cigna's share price was up by 7.7% as of 1:15 p.m. ET.Putting Humana merger speculation to restCigna stated clearly in its release today that it is "not pursuing a combination with Humana." Investors had been wondering if the two companies might merge, and the recent presi ...