Celulosa Arauco y Constitución
| Company type | joint stock company | 
|---|---|
| Founded | 1979 | 
| Headquarters | Santiago, Chile | 
Key people  | Anacleto Angelini  Julio Ponce  | 
| Products | woodpulp engineered wood products wood  | 
Number of employees  | 13227 direct employees+ 27000 contract workers | 
| Parent | Empresas Copec | 
| Subsidiaries | Forestal Valdivia | 
| Website | www.arauco.cl | 
Celulosa Arauco y Constitución (also called CELCO or ARAUCO) is a Chilean wood pulp, engineered wood and forestry company controlled by Anacleto Angelini's economic group Empresas Copec. In 2006 CELCO/ARAUCO had five pulp mills in Chile and one in Argentina. Apart from pulp mills, CELCO/ARAUCO has 4 engineered wood manufacturing plants in Chile, 2 in Argentina and 2 in Brazil.
The company was founded in September 1979 as a result of the fusion of Celulosa Arauco S.A. (1967) and Celulosa Constitución S.A. (1969). Both companies had been privatized during the Pinochet era from CORFO in 1977 and 1979, respectively.