Implies the person has considerable money, as investments are usually associated with wealth. Being a fundholder, he attended the exclusive investors' conference.
Pro Tip 2/3
Active Involvement
Suggests active participation in managing or tracking investments, not just owning them. The fundholder spent her morning reviewing stock market trends.
Pro Tip 3/3
Responsibility
Connotes a sense of responsibility for investment choices and their outcomes. The fundholder felt accountable for the losses in his portfolio.