Domare stoppar jätteaffär av konkurrensskäl

Aetna, Inc. /ˈɛtnə/ (stylized as ætna) is an American managed health care company, which sells traditional and consumer directed health care insurance plans and related services, such as medical, pharmaceutical, dental, behavioral health, long-term care, and disability plans. Aetna is a member of the Fortune 100.

Humana Inc. is a for-profit American health insurance company based in Louisville, Kentucky. As of 2014 Humana has had over 13 million customers in the U.S., reported a 2013 revenue of US$41.3 billion, and has had over 52,000 employees. In 2013, the company ranked 73 on the Fortune 500 list, which made it the highest ranked (by revenues) company based in Kentucky. It has been the third largest health insurance in the nation. The U.S. Dept. of Health and Human Services investigated Humana in 2009 for sending flyers to Medicare recipients that the AARP characterized as deceptive. The company's managed care model has also been criticized for ethical lapses and limitations. The health insurer Aetna said on July 3, 2015, that it had agreed to acquire its smaller rival Humana for $37 billion in cash and stock.

Anthem Inc. is an American health insurance company founded in the 1940s, prior to 2014 known as WellPoint, Inc. It is the largest for-profit managed health care company in the Blue Cross and Blue Shield Association. It was formed when Anthem Insurance Company acquired WellPoint Health Networks, Inc., with the combined company adopting the name WellPoint, Inc.; trading on the NYSE for the combined company began under the WLP symbol on December 1, 2004. On December 3, 2014, WellPoint changed its corporate name to Anthem Inc, and its NYSE ticker changed from WLP to ANTM.

Cigna is an American worldwide health services organization. Its insurance subsidiaries are major providers of medical, dental, disability, life and accident insurance and related products and services, the majority of which are offered through employers and other groups (e.g. governmental and non-governmental organizations, unions and associations). Cigna also offers Medicare and Medicaid products and health, life and accident insurance coverages primarily to individuals in the U.S. and selected international markets. In addition to its ongoing operations described above, Cigna also has certain run-off operations, including a Run-off Reinsurance segment. In the Phoenix, Arizona, metropolitan area, Cigna runs a full-service staff-model HMO (health maintenance organization) with satellite clinics throughout the region, known as the Cigna Medical Group Their tag line is 'Together, all the way.' Cigna Global Health Benefits also operates under the Cigna corporation.