At the end of 1990, the Sigdo Koppers S.A. business group joined the property, subsequently obtaining control of the company in 1993. This group participates, among other activities, in the service sector through Engineering and Construction Sigdo Koppers S.A., Puerto Ventanas S.A. and its subsidiary Fepasa S.A .; in the industrial sector through Enaex, Magotteaux, in the automotive sector through SKBergé S.A .; and in the import, sale and lease of heavy machinery, agricultural equipment and transportation for construction and supplies through SK Comercial S.A.

As of December 31, 2017, the ownership structure of Enaex S.A. was constituted as follows:

Presentacion1As of December 31, 2017, the capital of Enaex S.A. was divided into 123,000,000 shares and its 12 main shareholders were:Presentacion2