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COMPANY'S OPERATIONS - Investment remeasurement (Details) € in Thousands, R$ in Thousands | Jun. 24, 2021 EUR (€) shares | Jun. 24, 2021 BRL (R$) | Jun. 23, 2021 EUR (€) | May 17, 2021 EUR (€) shares | May 17, 2021 BRL (R$) shares | May 16, 2021 | Jun. 30, 2021 BRL (R$) | Jun. 24, 2021 BRL (R$) shares | Jun. 23, 2021 BRL (R$) | Dec. 31, 2020 BRL (R$)
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COMPANY'S OPERATIONS |  |  |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  | R$ 497,083 |  |  | R$ 359,071
Spinnova OY |  |  |  |  |  |  |  |  |  |
COMPANY'S OPERATIONS |  |  |  |  |  |  |  |  |  |
Increase in investment in associate |  |  |  | € 5,000 | R$ 32,820 |  |  |  |  |
Proportion of ownership interest in associate | 19.91% | 19.91% | 27.15% | 27.15% | 27.15% | 23.44% |  |  |  |
Number of associate's equity shares held by the Company | shares |  |  |  | 9,808,530 | 9,808,530 |  |  |  |  |
Increase in goodwill |  |  |  |  | R$ 22,553 |  |  |  |  |
Gain on remeasurement of investment in associate | € 19,495 | R$ 115,562 |  |  |  |  |  |  |  |
Investments | € 21,037 |  | € 1,541 |  |  |  |  | R$ 124,696 | R$ 9,134 |
Portion of gain recognized in Company's share of profit (loss) of associate |  | 24,569 |  |  |  |  |  |  |  |
Effect of exchange rate variation on investment abroad |  | 746 |  |  |  |  |  |  |  |
Portion of gain recognized directly in statement of income |  | 90,992 |  |  |  |  |  |  |  |
Spinnova OY |  |  |  |  |  |  |  |  |  |
COMPANY'S OPERATIONS |  |  |  |  |  |  |  |  |  |
Number of shares issued | shares | 13,140,605 |  |  |  |  |  |  | 13,140,605 |  |
Proceeds from issuance of shares | € 100,000 | R$ 587,560 |  |  |  |  |  |  |  |

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