PersonPersonLegal person, including an individual, estate, trust, corporation, partnership, limited liability company, financial institution, joint venture, association, or other organization or entity (whether governmental or private). who invested in, converted, or is converting a residential rental apartment building to a Cooperative PropertyCooperative PropertyMultifamily residential property owned by a Cooperative Organization. and continues to own unsold shares in the Cooperative OrganizationCooperative OrganizationCorporation or legal entity where each shareholder or equity owner is granted the right to occupy a unit in a multifamily residential property under a proprietary lease or occupancy agreement. .