TIL Apple comprises 13% of US GDP with a market cap of 3 trillion dollars, greater than the GDP of the entire United Kingdom.

https://thefederal.com/news/gdps-of-entire-nations-at-2-08-trillion-apple-is-bigger-than-these-things/

https://www.reddit.com/r/todayilearned/comments/153knat/til_apple_comprises_13_of_us_gdp_with_a_market/