| Loss per share, basic and diluted |
| | Year ended December 31, 2020 | | | Year ended December 31, 2019 | | | Year ended December 31, 2018 | | Numerator: | | | | | | | | | | | | | Net loss attributable to Navios Holdings common stockholders | | $ | (192,961 | ) | | $ | (192,110 | ) | | $ | (268,718 | ) | Less: | | | | | | | | | | | | | Undeclared dividend on preferred stock and on unvested restricted shares | | | (5,144 | ) | | | (7,178 | ) | | | (10,241 | ) | Plus: | | | | | | | | | | | | | Tender Offer — Redemption of preferred stock Series G and H including $16,863 of undeclared preferred dividend cancelled | | | — | | | | 45,680 | | | | — | | Gain from eliminated dividend on preferred stock due to conversion | | | 166 | | | | — | | | | — | | Loss attributable to Navios Holdings common stockholders, basic and diluted | | $ | (197,939 | ) | | $ | (153,608 | ) | | $ | (278,959 | ) | Denominator: | | | | | | | | | | | | | Denominator for basic and diluted net loss per share attributable to Navios Holdings common stockholders — adjusted weighted shares | | | 12,896,568 | | | | 12,356,024 | | | | 11,958,959 | | Basic and diluted net loss per share attributable to Navios Holdings common stockholders | | $ | (15.35 | ) | | $ | (12.43 | ) | | $ | (23.33 | ) |
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