https://www.vice.com/en_us/article/59n7e8/silicon-valley-owes-us-dollar100-billion-in-taxes-at-least

Just six of Silicon Valley's largest corporations skipped out on more than $100 billion in taxes this decade, according to a new report by Fair Tax Mark, a UK tax transparency organization.

Over the period of 2010 to 2019, Fair Tax Mark analyzed the global tax conduct of Facebook, Apple, Amazon, Netflix, Alphabet, and Microsoft (which it calls “the Silicon Six”) as the tech firms funneled revenues and profits through tax havens, shell companies, and nations with low tax rates.