• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
FinanceUnitedHealth Group

UnitedHealth CEO steps down as insurer suspends its financial outlook, 5 months after UnitedHealthcare boss was killed in Manhattan ambush

By
Michelle Chapman
Michelle Chapman
and
The Associated Press
The Associated Press
Down Arrow Button Icon
By
Michelle Chapman
Michelle Chapman
and
The Associated Press
The Associated Press
Down Arrow Button Icon
May 13, 2025, 7:50 AM ET
Andrew Witty, Chief Executive Officer of UnitedHealth Group, testifies at a Senate Finance Committee hearing examining cyber attacks on health care, and the Change Healthcare cyber attack, on May 1, 2024, on Capitol Hill in Washington.
Andrew Witty, Chief Executive Officer of UnitedHealth Group, testifies at a Senate Finance Committee hearing examining cyber attacks on health care, and the Change Healthcare cyber attack, on May 1, 2024, on Capitol Hill in Washington.Jacquelyn Martin—AP

UnitedHealth CEO Andrew Witty is stepping down for personal reasons and the nation’s largest health insurer suspended its full-year financial outlook due to higher-than-expected medical costs.

Recommended Video

UnitedHealth cut its 2025 forecast last month following it’s first quarterly earnings miss in more than a decade. Shares of UnitedHealth, which have plummeted 38% since the deadly Dec. 4 ambush of company executive Brian Thompson in midtown Manhattan, fell another 8% before the opening bell Tuesday.

The Minnesota company said Tuesday that Chairman Stephen Hemsley will become CEO, effective immediately.

Hemsley was UnitedHealth Group CEO from 2006 to 2017. He will remain chairman of the company’s board. Witty will serve as a senior adviser to Hemsley.

“Leading the people of UnitedHealth Group has been a tremendous honor as they work every day to improve the health system, and they will continue to inspire me,” Witty said.

UnitedHealth said that it suspended its 2025 outlook as medical costs of many Medicare Advantage beneficiaries new to UnitedHealthcare were higher than expected.

More than 50 million people have health insurance under UnitedHealth Group Inc. It also has a large pharmacy benefit manager that runs prescription drug coverage and a growing Optum segment that delivers care and provides technical support.

UnitedHealthcare is the nation’s largest provider of Medicare Advantage plans, with more than 8 million customers. Those are privately run versions of the federal government coverage program mostly for people ages 65 and older.

The company has wrestled with the media attention surrounding Luigi Mangione, who was indicted last month on a federal murder charge in the killing of UnitedHealthcare CEO Brian Thompson.

Join us at the Fortune Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Authors
By Michelle Chapman
See full bioRight Arrow Button Icon
By The Associated Press
See full bioRight Arrow Button Icon

Latest in Finance

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Finance

Tim Cook reveals the advice he gave Apple’s next CEO: The most important decision he’ll make is ‘where he spends his time’
Big TechApple
Tim Cook reveals the advice he gave Apple’s next CEO: The most important decision he’ll make is ‘where he spends his time’
By Alexei OreskovicApril 30, 2026
6 hours ago
Moreno gestures with his hand
PoliticsU.S. Senate
A ‘no-brainer’: Senate unanimously bans members and staff from using prediction markets
By Mary Clare Jalonick and The Associated PressApril 30, 2026
10 hours ago
Kevin Warsh, nominee for chairman of the Federal Reserve.
BankingFederal Reserve
Former Fed economist raises alarm on Warsh after historically partisan vote: ‘this is not normal is going to be a theme’
By Eva RoytburgApril 30, 2026
10 hours ago
A banner depicting portraits of Iran's late Supreme Leader Ayatollah Ali Khamenei and Ayatollah Mojtaba Khamenei
PoliticsIran
Iranian supreme leader says the only place Americans belong in the Gulf is ‘at the bottom of its waters’
By Jon Gambrell, Aamer Madhani and The Associated PressApril 30, 2026
10 hours ago
Wind energy CEO says company ‘must adapt’ as Trump offers $2 billion to kill offshore wind projects
EnergyU.S. Politics
Wind energy CEO says company ‘must adapt’ as Trump offers $2 billion to kill offshore wind projects
By Marco Quiroz-GutierrezApril 30, 2026
12 hours ago
Lithium battery facility
North AmericaChina
China dominates the world’s lithium supply. The U.S. just found 328 years’ worth in its own backyard
By Jake AngeloApril 30, 2026
13 hours ago

Most Popular

Apple cofounder Ronald Wayne—whose stake would be worth up to $400 billion had he not sold it in 1976—says that at 91, he has no regrets
Success
Apple cofounder Ronald Wayne—whose stake would be worth up to $400 billion had he not sold it in 1976—says that at 91, he has no regrets
By Preston ForeApril 27, 2026
4 days ago
Google Cloud revenue is now 18% of Alphabet's business. Is this the beginning of the end of Google's search identity?
Big Tech
Google Cloud revenue is now 18% of Alphabet's business. Is this the beginning of the end of Google's search identity?
By Alexei OreskovicApril 29, 2026
1 day ago
China dominates the world's lithium supply. The U.S. just found 328 years' worth in its own backyard
North America
China dominates the world's lithium supply. The U.S. just found 328 years' worth in its own backyard
By Jake AngeloApril 30, 2026
13 hours ago
With no end in sight, Trump considers new options in Iran war—including the ‘Dark Eagle’ hypersonic missile
Big Tech
With no end in sight, Trump considers new options in Iran war—including the ‘Dark Eagle’ hypersonic missile
By Jim EdwardsApril 30, 2026
21 hours ago
‘The cost of compute is far beyond the costs of the employees’: Nvidia executive says right now AI is more expensive than paying human workers
AI
‘The cost of compute is far beyond the costs of the employees’: Nvidia executive says right now AI is more expensive than paying human workers
By Sasha RogelbergApril 28, 2026
3 days ago
Accenture's Julie Sweet blew up 50 years of company history. She says the hardest part is still ahead
Conferences
Accenture's Julie Sweet blew up 50 years of company history. She says the hardest part is still ahead
By Nick LichtenbergApril 29, 2026
2 days ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.