Assuming a portfolio manager position means one has more stakeholders than in program, project, or operational roles. The goal is to identify all interested stakeholders but often overlooked are:

Consumer groups are commonly considered during strategic planning and are a well-known external stakeholder category, not typically overlooked.

Alliances and partnerships are typically identified during strategic alignment discussions and are not among the most overlooked groups.

Industry associations are visible external entities that organizations regularly engage with and are not commonly missed in stakeholder identification.

External resource providers - including contractors, vendors, outsourcing partners, and staffing agencies - directly impact portfolio execution through resource availability, cost, and capacity, yet they are often excluded from stakeholder identification because they are outside the organization. Portfolio managers must identify them because their constraints and commitments affect scheduling, budgeting, and risk across multiple components. The PMI Standard for Portfolio Management highlights external providers as a commonly missed stakeholder category.