Fortune Connections

Find four groups of four Fortune 500 companies that share something in common. You have 4 mistakes allowed.

Charter CommunicationsAltria GroupNewmontCenteneAbbott LaboratoriesMarkel GroupAmgenExelonTJX CompaniesAbbVieDTE EnergyHormel FoodsAmerican International GroupPG&EAmerican Electric PowerAmerican Express

Mistakes:

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