Ethical Duty in Personal Investments

Consider the following scenario: Alex is a portfolio manager at an investment firm. He has recently made significant investments in a biotechnology company after conducting comprehensive research. However, unbeknownst to his employer, Alex holds personal investments in several biotech startups, including companies that directly compete with the one he is promoting.

According to the CFA Institute's Research Objectivity Standards, what should Alex do to uphold ethical standards regarding his personal investments?