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 June 30, 2018, all shares were subscribed and paid, and they were owned in accordance with the following breakdown:
| Shareholders | Shares | Percentage |
| Enel S.p.A | 29,762,213,531 | 51.80% |
| ADR'S (Citibank N.A. according to circular 1.375 of the CMF) | 4,419,200,978 | 7.69% |
| Chilean Pension Funds | 8,908,044,505 | 15.51% |
| Foreign investment funds | 50,164,512 | 0.09% |
| Custodian Banks | 8,330,658,234 | 14.50% |
| Brokers, Insurance Companies and Mutual Funds | 4,417,866,955 | 7.69% |
| Other Shareholders | 1,564,492,801 | 2.72% |
| Total shares | 57,452,641,516 | 100.00% |