Iowa Code § 543B.2: Individual licenses necessary.

A partnership, association, corporation, professional corporation, or professional limited liability company shall not be granted a license, unless every member or officer of the partnership, association, corporation, professional corporation, or professional limited liability company who actively participates in the brokerage business of the partnership, association, corporation, professional corporation, or professional limited liability company holds a license as a real estate broker or salesperson, and unless every employee who acts as a salesperson for the partnership, association, corporation, professional corporation, or professional limited liability company holds a license as a real estate broker or salesperson. At least one member or officer of each partnership, association, corporation, professional corporation, or professional limited liability company shall be a real estate broker.