** Shares of health insurer Cigna CI.N fall 4% to $289.82 premarket
** Co says president and COO Brian Evanko to succeed retiring chief David Cordani as CEO, starting July
** Cordani to be executive chair of Cigna's board after the transition
** Evanko, who has been with the company for three decades, currently oversees Cigna Healthcare and Evernorth Health Services
** Separately, co reaffirms 2026 forecast for adjusted income from operations of at least $30.25 per share
** As of last close, stock up 6% YTD
(Reporting by Sahil Pandey in Bengaluru)
((Sahil.Pandey@thomsonreuters.com))