Thomas Kirk Kristiansen represents the most active owner in the fourth generation of the owner family. He is Chair of the Board of LEGO A/S and has been a member of the Board since 2007.

Thomas is, furthermore, Chair of the Board of Directors of KIRKBI A/S, the LEGO Foundation and Koldingvej 2, Billund A/S. Also, Thomas is a board member of one fully owned subsidiary of KIRKBI A/S and Executive Manager of Kirk & Kirk Holding ApS with management roles in four subsidiaries.