As a compliance officer at a mid-sized investment firm, you are responsible for ensuring that all employees adhere to the ethical standards set forth by the CFA Institute. During a routine review, you discover that one of the portfolio managers has been providing certain clients with inside information about an upcoming merger, which could significantly affect the stock price of a company involved. You need to determine how to proceed in order to uphold the standards of professionalism required by the CFA Institute.
Which of the following actions would be the most appropriate response to this situation according to the CFA Institute's Code of Ethics and Standards of Professional Conduct?