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UNAUDITED INTERIM CONSOLIDATED INCOME STATEMENT - EUR (€) € in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Profit or loss [abstract] |  |  |  |
Revenue | € 1,518 | € 1,031 | € 2,859 | € 2,468
Cost of sales | (1,319) | (957) | (2,518) | (2,241)
Gross profit | 199 | 74 | 341 | 227
Selling and administrative expenses | (67) | (57) | (127) | (123)
Research and development expenses | (9) | (7) | (20) | (20)
Other gains and losses - net | 44 | (11) | 87 | (79)
Income / (loss) from operations | 167 | (1) | 281 | 5
Finance costs - net | (37) | (42) | (92) | (87)
Income / (loss) before tax | 130 | (43) | 189 | (82)
Income tax (expense) / benefit | (22) | 11 | (33) | 19
Net income / (loss) | 108 | (32) | 156 | (63)
Net income attributable to: |  |  |  |
Equity holders of Constellium | 107 | (33) | 153 | (64)
Non-controlling interests | 1 | 1 | 3 | 1
Net income / (loss) | € 108 | € (32) | € 156 | € (63)
Earnings per share attributable to the equity holders of Constellium (in Euros) |  |  |  |
Basic (in EUR per share) | € 0.76 | € (0.24) | € 1.09 | € (0.46)
Diluted (in EUR per share) | € 0.73 | € (0.24) | € 1.04 | € (0.46)
Weighted average number of shares |  |  |  |
Basic (in shares) | 140,636,684 | 137,901,336 | 140,301,539 | 137,903,307
Diluted (in shares) | 146,730,106 | 137,901,336 | 146,730,106 | 137,903,307

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