Combined market cap of Apple, Facebook, Alphabet, and Amazon is ~$5T, their combined 2019 revenue was ~$773B, and they have a combined cash reserve of ~$420B (Kyle Daly/Axios)

Kyle Daly / Axios:
Combined market cap of Apple, Facebook, Alphabet, and Amazon is ~$5T, their combined 2019 revenue was ~$773B, and they have a combined cash reserve of ~$420B  —  The four Big Tech CEOs who will testify before Congress Wednesday command global empires with power and wealth that make them more like countries than companies.

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