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v3.22.1

As of December 31, 2021 and 2020, the Company’s ownership structure was as follows (Details) - shares | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 1,387,524,047 | 1,387,524,047
Percentage of shares | 100.00% | 100.00%
U S I M 3 [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 1,341,734,047 | 1,380,114,547
Percentage of shares | 96.70% | 99.47%
Percentage of voting equity interests acquired | 100.00% | 100.00%
Treasury shares [member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 45,790,000 | 7,409,500
Percentage of shares | 3.30% | 0.53%
Vicunha Acos S A [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 679,522,254 | 679,522,254
Percentage of shares | 48.97% | 48.97%
Percentage of voting equity interests acquired | 50.65% | 49.24%
Rio Laco Participacoes S A [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 45,706,242 | 58,193,503
Percentage of shares | 3.29% | 4.19%
Percentage of voting equity interests acquired | 3.41% | 4.22%
Nyse Adrs [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 250,564,538 | 248,763,533
Percentage of shares | 18.06% | 18.90%
Percentage of voting equity interests acquired | 18.67% | 19.00%
Other One [Member] |  |
Reserve Quantities [Line Items] |  |
Number of common shares outstanding | 365,941,013 | 393,635,257
Percentage of shares | 26.38% | 27.41%
Percentage of voting equity interests acquired | 27.27% | 27.55%

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