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

Trendingnow

1

Now worth $200 million, Sarah Jessica Parker credits being ‘one of eight kids that struggled financially’ for her hunger, ambition, and work ethic

2

The Pentagon said Iran War costs $29 billion, but the real cost is closer to $200 billion—and counting

3

Amazon's record Prime Day masks a darker truth: Americans are spending more and getting less

1

Now worth $200 million, Sarah Jessica Parker credits being ‘one of eight kids that struggled financially’ for her hunger, ambition, and work ethic

2

The Pentagon said Iran War costs $29 billion, but the real cost is closer to $200 billion—and counting

3

Amazon's record Prime Day masks a darker truth: Americans are spending more and getting less
FinanceFortune 500

UnitedHealth-Aetna colossus would overtake Apple on the Fortune 500

Shawn Tully
By
Shawn Tully
Shawn Tully
Senior Editor-at-Large
Down Arrow Button Icon
Shawn Tully
By
Shawn Tully
Shawn Tully
Senior Editor-at-Large
Down Arrow Button Icon
June 16, 2015, 1:49 PM ET
UnitedHealth Retail Stores Sell Insurance With A Smile
Clients get information from a reception desk at a UnitedHealth Group Inc., storefront in Flushing, New York, U.S., on Monday January 14, 2013. Photographer: Michael Nagle/BloombergPhotograph by Michael Nagle—Bloomberg via Getty Images
Add Fortune on Google for similar content.

In the merger world, no sector is hotter than health insurance. The biggest U.S. carriers are all engaged in a round-robin of talks that that could reshape the five market leaders––themselves the product of frenzied consolidation––into just two colossi, and one odd-carrier-out.

The Wall Street Journal is reporting that Anthem, the nation’s second largest insurer, has bid $175 a share for No. 5 ranked Cigna. That’s a 27% premium; though Cigna has reportedly spurned Anthem’s overtures, its stock has already jumped from $137.50 when the reports broke early Monday, to $152 by mid-day Tuesday. Indeed, investors are giving plenty of credence to the merger-mania scenario.

Humana (ranked fourth among the big insurers) is considered a jewel because of its strength in Medicare Advantage, a private version of the federal program for retirees. Rumors are flying that Aetna (No. 3) is eyeing Humana. The reports have pushed Humana’s shares from around $180 on May 28 to as high as $217, a gain, at the peak, of $5.6 billion.

The industry leader, by a wide margin, is UnitedHealth Group (UNH). Given its already immense size, UnitedHealth doesn’t need a deal. It’s extremely strong across the major markets: Medicare Advantage, programs for corporations, pharmacy benefit plans, and back-office outsourcing for physicians groups and hospitals. But now, reports are rife that UnitedHealth is joining the roundelay by courting Aetna (AET).

UnitedHealth is a shooting star within the Fortune 500. Its growth has been especially spectacular since its CEO, Stephen Hemsley, began effectively running the enterprise as COO in mid-1999, rising to the top job seven years later. Over that 16- year span, UnitedHealth’s sales have jumped from $17.3 billion to $130.5 billion, catapulting the carrier 84 places on the Fortune 500 to No. 14 on the current list, which ranks companies by their 2014 sales. Since Hemsley took charge, UnitedHealth’s stock has risen 1700%, delivering 19.6% annual returns to investors.

That performance puts UnitedHealth in a position to acquire Aetna. In theory, bigger is the way to go. Greater scale should lower the IT and other overhead costs of recruiting new customers and managing claims. Greater heft would also strengthen an insurer’s bargaining power with hospitals and physician groups, which are also gaining power through consolidation. Such negotiating advantages are especially crucial to gaining share in the rapidly expanding state exchanges established by the Affordable Care Act.

If UnitedHealth were to purchase Aetna, it would boast $189 billion in sales. If the carriers were combined today, they would rank fifth on the Fortune 500, leapfrogging the likes of AT&T (No. 12), Ford Motor (No. 9), and Apple, the current No. 5. That mega-merger would make UnitedHealth the world’s largest healthcare company, a position now held by drug-delivery provider McKesson (No. 11). Only the perennial top two on the Fortune 500, Wal-Mart and Exxon, would be significantly larger than a UnitedHealth-Aetna combination.

Of course, that union could leave Humana an orphan, since Aetna would vanish as a potential acquirer. In fact, rumors of an Aetna-UnitedHealth merger has hammered Humana’s stock from a peak of $217 to around $200 at mid-day on June 16.

It’s impossible to say if such a deal will actually happen. Given UnitedHealth’s fantastic success on its own, and the risks of major disruption from integrating two complex businesses, the merger seems unlikely. Still, investors in both camps are getting pumped. Usually, when rumors of a big merger hit, the target’s stock surges, and the acquirer’s falls. This time, shares of both are rising, demonstrating that shareholders think that bigger would be better, even when it costs the buyer a fat premium. On June 16, Aetna’s shares had risen by about 3% as of 1 p.m., and UnitedHealth gained around 2%. Combined, their market caps surged to well over $3 billion.

Trained as an accountant, Hemsley is a master of using dollops of new capital to generate tons of extra profits. He’ll carefully weigh the extra stock and cash that a merger would require against the added cash it would generate. This cool, Cartesian thinker knows a good deal, and won’t be swayed by deal fever.

About the Author
Shawn Tully
By Shawn TullySenior Editor-at-Large

Shawn Tully is a senior editor-at-large at Fortune, covering the biggest trends in business, aviation, politics, and leadership.

See full bioRight Arrow Button Icon
Add Fortune on Google for similar content.

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

Top CD rates from major banks June 25, 2026: Chase CDs, Bank of America CDs, Citibank CDs, and more
Personal FinanceCertificates of Deposit (CDs)
Top CD rates from major banks on June 25, 2026: Chase CDs, Bank of America CDs, Citibank CDs, and more
By Joseph HostetlerJune 25, 2026
19 seconds ago
Current price of Ethereum for June 25, 2026
Personal FinanceEthereum
Current price of Ethereum for June 25, 2026
By Joseph HostetlerJune 25, 2026
23 seconds ago
Current price of Bitcoin for June 25, 2026
Personal FinanceCryptocurrency
Current price of Bitcoin for June 25, 2026
By Joseph HostetlerJune 25, 2026
26 seconds ago
Current price of gold as of June 25, 2026
Personal Financegold prices
Current price of gold as of June 25, 2026
By Danny BakstJune 25, 2026
12 minutes ago
Current price of oil as of June 25, 2026
Personal FinanceOil
Current price of oil as of June 25, 2026
By Joseph HostetlerJune 25, 2026
15 minutes ago
Current price of silver as of Thursday, June 25, 2026
Personal Financesilver
Current price of silver as of Thursday, June 25, 2026
By Joseph HostetlerJune 25, 2026
20 minutes ago

Most Popular

Now worth $200 million, Sarah Jessica Parker credits being ‘one of eight kids that struggled financially’ for her hunger, ambition, and work ethic
Success
Now worth $200 million, Sarah Jessica Parker credits being ‘one of eight kids that struggled financially’ for her hunger, ambition, and work ethic
By Orianna Rosa RoyleJune 24, 2026
1 day ago
The Pentagon said Iran War costs $29 billion, but the real cost is closer to $200 billion—and counting
Economy
The Pentagon said Iran War costs $29 billion, but the real cost is closer to $200 billion—and counting
By Jacqueline MunisJune 24, 2026
1 day ago
Amazon's record Prime Day masks a darker truth: Americans are spending more and getting less
Retail
Amazon's record Prime Day masks a darker truth: Americans are spending more and getting less
By Nick LichtenbergJune 24, 2026
22 hours ago
Ray Dalio just finished a 10-day trip to China. He says global leaders know America ‘doesn’t have what it takes to fight to maintain its empire’
Asia
Ray Dalio just finished a 10-day trip to China. He says global leaders know America ‘doesn’t have what it takes to fight to maintain its empire’
By Nick LichtenbergJune 24, 2026
24 hours ago
After forcing workers back to the office, Goldman Sachs and JPMorgan Chase are now letting their staff work remotely—but only for the World Cup
Success
After forcing workers back to the office, Goldman Sachs and JPMorgan Chase are now letting their staff work remotely—but only for the World Cup
By Orianna Rosa RoyleJune 23, 2026
2 days ago
Trump’s international student crackdown kicked off a domino effect that could shave nearly $500 billion off the economy
Economy
Trump’s international student crackdown kicked off a domino effect that could shave nearly $500 billion off the economy
By Tristan BoveJune 24, 2026
19 hours 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.