| Loss per share, basic and diluted |
| | Year ended December 31, 2018 | | | Year ended December 31, 2017 | | | Year ended December 31, 2016 | | Numerator: | | | | | | | | | | | | | Net loss attributable to Navios Holdings common stockholders | | $ | (268,718) | | | $ | (165,910 | ) | | $ | (303,823 | ) | Less: | | | | | | | | | | | | | Declared and undeclared dividend on preferred stock and on unvested restricted shares | | | (10,241) | | | | (10,421 | ) | | | (15,909 | ) | Plus: | | | | | | | | | | | | | Tender Offer – Redemption of preferred stock Series G and H including $972 and $5,063 of undeclared preferred dividend cancelled for the year ended December 31, 2017 and December 31, 2016, respectively | | | — | | | | 1,033 | | | | 46,627 | | Loss attributable to Navios Holdings common stockholders, basic and diluted | | $ | (278,959) | | | $ | (175,298 | ) | | $ | (273,105 | ) | Denominator: | | | | | | | | | | | | | Denominator for basic and diluted net loss per share attributable to Navios Holdings common stockholders — adjusted weighted shares | | | 11,958,959 | | | | 11,667,346 | | | | 10,736,678 | | Basic and diluted net loss per share attributable to Navios Holdings stockholders | | $ | (23.33) | | | $ | (15.02 | ) | | $ | (25.44 | ) |
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