In addition to information technology, because a lot of them also offer cloud computing or other kind of developer-targeted services: Apple: Consumer discretio

In addition to information technology, because a lot of them also offer cloud computing or other kind of developer-targeted services: Apple: Consumer discretionary (electronics) Alphabet: Communication services (advertising and fiber networks), health care (mostly research), financials (investing), whatever urban planning is classified under, Amazon: Consumer discretionary (retail), consumer staples (food) Microsoft: Industrials (office services), communication services Facebook: Communication services (chat apps and advertising) I could be totally off base, and investors do ignore the "tech" label. But from what I've heard in the news and seen in discussions, it doesn't seem so.