The document summarizes the findings of a representativeness study on temporary agency work conducted by Eurofound. It finds that: 1) There are 62 trade union organizations related to temporary work in 22 EU member states, with geographical and membership coverage varying significantly between countries. 2) There are 41 employer associations identified across 26 EU countries, with narrower domain definitions than the trade unions. Many employer organizations are not involved in collective bargaining. 3) Eurociett and UNI Europa are considered the most important European social partner organizations representing employers and employees respectively in the temporary work sector, based on their membership and mandate.