you'd have to be functionally retarded to interpret "a company worth more than 9 figures" as "limited to Google."
If "more than 9 figures" means more than $999,999,999, then there are several thousand corporations just in America.
The bottom company in the S&P 500 is worth $3.6B.
Disclaimer: I think the idea of nationalizing these companies is insane. I trust Google way more than I trust the NSA.