We cover public companies traded on U.S. exchanges.  As of 6/28/2019, we cover 6,294 companies, 4,760 of those are on the major U.S. exchanges. For the S&P 500, as of 6/28/2019, we cover 480 companies (i.e. 96% coverage).  Some companies are not covered due to requirements that our algorithms match SEC filings for companies to pricing history for securities. Our mapping engine may not reconcile some securities to financial statements because of complicated corporate actions, multiple securities assignments to a single company, or non standardized rendering of ticker symbols. Note that for indexes such as the S&P 500, a company may be represented more than once by different securities.  This is because a single company can issue multiple share classes. VALDX only represents a company once using the company’s primary security.  Therefore, even though the S&P 500 may contain 505 securities, we will at most contain 500 companies.