In 2012 this was relaxed in JOBS Act which relaxed the 500 threshold to 2000 but more importantly it ignored employees so now private companies of gargantuan trillion dollar valuation and thousands of employees have no disclosure requirements.
So, this is a classic case of regulation that did well but was relaxed and now creates hidden risks.
[1]: https://www.investopedia.com/terms/5/500-shareholder-thresho...