(Bloomberg) – American Express Co. president Ed Gilligan died Friday morning after becoming ill on an overseas flight to New York.

Gilligan, 55, was returning from a business trip to Tokyo on a corporate aircraft, which made an emergency landing, according to a person with knowledge of the matter. Efforts to resuscitate him were unsuccessful and the cause of death is undetermined, said the person, who asked not to be identified discussing a personal issue.

"This is deeply painful and frankly unimaginable for all of us who had the great fortune to work with Ed, and benefit from his insights, leadership and enthusiasm," Chief Executive Officer Ken Chenault said in a letter to the staff. "His contributions have left an indelible imprint on practically every area of our business."

Want to continue reading?
Become a Free PropertyCasualty360 Digital Reader

  • All PropertyCasualty360.com news coverage, best practices, and in-depth analysis.
  • Educational webcasts, resources from industry leaders, and informative newsletters.
  • Other award-winning websites including BenefitsPRO.com and ThinkAdvisor.com.

© 2024 ALM Global, LLC, All Rights Reserved. Request academic re-use from www.copyright.com. All other uses, submit a request to [email protected]. For more information visit Asset & Logo Licensing.