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Aetna Inc. operates as a health care benefits company in the United States. It operates through three segments: Health Care, Group Insurance, and Large Case Pensions. The Health Care segment offers medical, pharmacy benefit management service, dental, behavioral health, and vision plans on an insured and employer-funded basis. It also provides point-of-service, preferred provider organization, health maintenance organization, and indemnity benefit plans, as well as health savings accounts and consumer-directed health plans. In addition, this segment offers Medicare and Medicaid products and services, as well as other medical products, such as medical management and data analytics services, medical stop loss insurance, workers' compensation administrative services, and products that provide access to its provider networks in select geographies. The Group Insurance segment offers life insurance products, including group term life insurance, voluntary spouse and dependent term life insurance, group universal life insurance, and accidental death and dismemberment insurance; disability insurance products; and long-term care insurance products, which provide the benefits to cover the cost of care in private home settings, adult day care, assisted living, or nursing facilities. The Large Case Pensions segment manages various retirement products comprising pension and annuity products primarily for tax-qualified pension plans. The company provides its products and services to employer groups, individuals, college students, part-time and hourly workers, health plans, health care providers, governmental units, government-sponsored plans, labor groups, and expatriates. Aetna Inc. was founded in 1853 and is based in Hartford, Connecticut.

Atlantic Power Corporation owns and operates a fleet of power generation assets in the United States and Canada. As of December 31, 2020, its portfolio consisted of twenty-one operating projects with an aggregate electric generating capacity of approximately 1,723 megawatts on a gross ownership basis and approximately 1,327 MW on a net ownership basis across eleven states in the United States and two provinces in Canada. The company sells its electricity to utilities and other customers. The company was incorporated in 2004 and is headquartered in Dedham, Massachusetts. As of May 14, 2021, Atlantic Power Corporation was taken private.