Form 5472 is a tax form that must be filed by certain foreign-owned corporations that are engaged in a reportable transaction with a related party. If you are a foreign founder of a C corporation and you engage in a reportable transaction with the corporation, you may be required to file Form 5472.

A reportable transaction is defined as any transaction between a foreign corporation and a related party that is not in the ordinary course of the corporation's trade or business. Some examples of reportable transactions include the sale of property to a related party, the lending of money to a related party, and the transfer of intangible property to a related party.

Whether or not the issuance of stock to a foreign founder is a reportable transaction will depend on the specific circumstances of the transaction. If you are unsure whether the issuance of stock to a foreign founder is a reportable transaction, you should consult with a tax professional or refer to the instructions for Form 5472.