The company’s shareholder capital is divided into 57,452,641,516 shares, with no face value, all belonging to the same series.
As of September 30, 2018, all shares were subscribed and paid, and they were owned in accordance with the following breakdown:
| Accionistas | Shares | % |
| Enel S.p.A | 29.762.213.531 | 51,80% |
| ADR'S (Citibank N.A. segpun circular N°1.375 de la CMF) | 4.129.270.378 | 7,19% |
| Administradoras de Fondos de Pensiones | 8.817.551.840 | 15,35% |
| Fondos de Inversión Extranjeros | 61.588.988 | 0,11% |
| Bancos Custodios | 8.108.082.744 | 14,11% |
| Corredores de Bolsa, Cías. De Seguros y Fondos Mutuos | 5.077.546.442 | 8,84% |
| Otros Accionistas | 1.496.387.593 | 2,60% |
| Total acciones | 57.452.641.516 | 100,00% |