ACS Actividades de Construccion y Servicios is a holding company. Through its subsidiaries, Co.'s activities are divided into the following areas: Construction, engaged in the construction of civil works, and residential and non-residential building construction; industrial services, engaged in the development of applied engineering services, installations and the maintenance of industrial infrastructures in the energy, communications and control systems sectors; services, groups together environmental services, the outsourcing of building maintenance services, logistics and transport services; and concessions, mainly engaged in transport infrastructure concessions.

Ence Energia Y Celulosa is engaged in the manufacture and commercialization of wood pulp and derivatives. Co. divides its activities into the following two business lines: Forest Division: Co. manages timberlands in South America and the Iberian Peninsula. Co. is involved in trading of wood, and supplies solid wood products including: plywood, sawn timber, parquet flooring and glued-edge paneling. Co. is involved in forest and environmental consulting. Pulp Division and Energy Production: Co. is engaged in the production of Eucalyptus globulus-based TCF and ECF paper pulp. Co. is also involved in the generation of electricity through biomass power producing plants.

Sacyr is the parent company of a group engaged in the acquisition, development and construction of urban properties for their subsequent rental or resale. Co. primarily leases and sells office buildings and complexes, housing units, and shopping centers. Co. is also engaged in the operation of urban car parking facilities. Co. offers services related to the real estate industry such as technical assistance in energy savings, inventory management, architectural design, telecommunications management, property maintenance, as well as gardening and landscaping. Co. also provides consulting services in the real estate fund management sector.

Tecnicas Reunidas is a general contractor company based in Spain. Co. engages in the engineering, design, and construction of industrial facilities for refining and petrochemical, oil and gas, power, and infrastructure and industries sectors worldwide. Co. constructs nuclear plants, conventional thermal plants, and renewable energy and cogeneration facilities for power sector; refineries and facilities for petrochemicals; water treatment, desalination, waste management, air, land, and marine transport facilities; and liquefaction, and storage facilities, as well as oil and gas fields and pipelines. Co. also provides engineering, management and operating services for industrial plants.