| Non-current assets | — | — |
| Property, plant and equipment | 632,410a | 592,920a |
| Right-of-use assets | 12,755a | 12,039a |
| Intangible assets | 16,961a | 16,769a |
| Investments in associates | 25,047a | 28,910a |
| Investment in a joint venture | 23,444a | 22,342a |
| Debt investment | 8,504a | 8,221a |
| Equity investments | 18a | 886a |
| Deferred tax assets | 25,465a | 28,562a |
| Other non-current assets | 47,068a | 40,442a |
| Other non-current financial assets | | 4,232a |
| Total non-current assets | 791,672a | 755,323a |
| Current assets | — | — |
| Inventories and supplies | 5,732a | 6,451a |
| Trade receivables | 33,661a | 37,052a |
| Other financial assets | 45,771a | 44,304a |
| Derivative financial instruments | 4a | 43a |
| Other current assets | 12,837a | 11,863a |
| Time deposits with maturity over three months but within one year | 72,912a | 17,123a |
| Cash and cash equivalents | 81,284a | 133,439a |
| Assets held for sale | 12,408a | |
| Total current assets | 264,609a | 250,275a |
| Current liabilities | — | — |
| Loans and borrowings | 20,084a | 21,894a |
| Trade and accrued payables | 59,685a | 61,382a |
| Lease liabilities | 2,264a | 2,217a |
| Contract liabilities | 508a | 1,383a |
| Other payables and accrued liabilities | 11,207a | 11,908a |
| Derivative financial instruments | 12a | 25a |
| Taxes payable | 19,949a | 25,130a |
| Liabilities held for sale | 5,166a | |
| Total current liabilities | 118,875a | 123,939a |
| Net current assets | 145,734a | 126,336a |
| Total assets less current liabilities | 937,406a | 881,659a |
| Non-current liabilities | — | — |
| Loans and borrowings | 61,243a | 88,208a |
| Lease liabilities | 8,296a | 7,858a |
| Provision for dismantlement | 99,740a | 97,091a |
| Deferred tax liabilities | 12,521a | 10,845a |
| Other non-current liabilities | 6,170a | 9,781a |
| Total non-current liabilities | 187,970a | 213,783a |
| Net assets | 749,436a | 667,876a |
| Equity | — | — |
| Issued capital | 75,180a | 75,180a |
| Reserves | 672,368a | 591,406a |
| Equity attributable to equity shareholders of the Company | 747,548a | 666,586a |
| Non-controlling interests | 1,888a | 1,290a |
| Total equity | 749,436a | 667,876a |