Nope. I can name dozens of companies with more than 500 shareholders and less than 10 Million in assets that are filing and required to file. Best way to look at it would be to look at the companies who lose their registration thru the SEC's delinquent filer program. Most of them do not meet the 500 shareholders/$10 million criteria.
You know, I was wondering, what kind of a busy company has a general info phone line that is picked up by the CEO?