 By 1901 there were so few rubber plants left in the concession that the Free State authorities granted permission for the villagers to cut down the remaining plants and grind their bark to retrieve the rubber. Once this process was completed the rubber tax was abolished. The Abir company merged with the Société Anversoise in May 1911 to form the Compagnie du Congo Belge and now focussed on the management of rubber plantations and the gathering of rubber from them. However, later that year it agreed with the Belgian government to reduce the size of its operations and its monopoly status. In July 1911 it was banned from collecting rubber within the confines of its old concession for 18 months and was subject to new laws introduced by the Free State. The later history of the company is unknown but it continued to operate until at least 1926 when it split off its oil palm concessions into the Maringa company.
