Apple, Google parent Alphabet, Amazon, Microsoft and Facebook are the five most valuable companies in the U.S. They've been called the Big Five or the Frightful Five and surely a few other names. Bloomberg QuickTake looks at how these tech companies have developed their huge market shares. Is it time to break them up?

Video by Henry Baker and Madeline Quinn

NOTE: Video was re-uploaded to correct error in the description of market shares.

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