Insiders at publicly traded companies, such as executives or others with unique knowledge, are required by the SEC to disclose certain purchases/sales of stock. This Rest API tracks those transactions, allowing developers to view the holdings of specific stockholders or the holdings of any insiders at a specific firm. It reports all insider transactions for owners and companies and provides transaction details for both non-derivative and derivative transactions for all owners. Ownership holdings are aggregated by both owners and by companies, with the value of the holdings as of the previous trading day. This data is valuable if you want to monitor the stock trades of individuals with inside information about a company, enabling developers to do so automatically as the filings are made with the SEC. Intrinio is a Fintech Marketplace for financial data feeds and apps.