Karen S. Lynch is an American businesswoman and the president and chief executive officer of CVS Health. Lynch serves on the board of directors of AHIP, CVS Health, and U.S. Bancorp. In 2015, she became the first female president of Aetna. She has held executive positions at Magellan Health Services and Cigna. In 2021, she became the highest-ranking female chief executive on the Fortune 500 list.