The Company's twelve largest shareholders as of December 31, 2018:
| Name | Number of Shares | % Share |
| Enel Chile S.A. (1) | 7,672,584,961 | 93.55% |
| Larraín Vial Corredores De Bolsa S.A. | 79,498,882 | 0.97% |
| Citibank N.A. Según circular 1375 C.M.F | 48,627,660 | 0.59% |
| Banco de Chile Corredores de Bolsa S.A. | 24,387,098 | 0.30% |
| Banco de Chile por cuenta de terceros no residentes | 20,494,229 | 0.25% |
| MBI Corredores de Bolsa S.A. | 11,682,705 | 0.14% |
| Santander Corredores de Bolsa Limitada | 10,296,917 | 0.13% |
| Fondo de Inversión Privado MBI Renta Fija Plus | 9,999,620 | 0.12% |
| Banco Itaú Corpbanca por cuenta de Inversionistas Extranjeros | 9,618,669 | 0.12% |
| BCI Corredores de Bolsa S.A. | 9,520,862 | 0.12% |
| EMF Retorno Absoluto FIP | 9,343,051 | 0.11% |
| Inversiones Orrego S.A. | 9,286,405 | 0.11% |
| Subtotal | 7,915,341,059 | |
| Others | 286,413,521 | 3.49% |
| TOTAL | 8.201.754.580 | 100% |
(1) Enel Chile S.A. is controlled directly by Enel SpA., holding 61.93% of ownership.