In many parts of Europe, it’s common for workers to take off weeks at a time, especially during the summer. Envious Americans say it’s time for the U.S. to follow suit.
Some 66% of U.S. workers say companies should adopt extended vacation policies, like a month off in August, in their workplaces, according to a Morning Consult survey of 1,047 U.S. adults.
This is what you are looking for:
https://www.statista.com/statistics/254085/business-establishments-in-the-us-by-employment-size/
Breakdown of the size/ # employees per business.
There are 4.6 million businesses with 1-4 employees. 8,600 businesses with 1,000+ employees.