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Note 19 - Earnings Per Share | 6 Months Ended
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Jun. 30, 2026
Notes to Financial Statements |
Earnings Per Share [Text Block] | 19. EARNINGS PER SHARE ​ Basic income per share excludes dilution and is computed by dividing net income attributable to Huntsman Corporation by the weighted average number of shares outstanding during the period. Diluted income per share reflects all potential dilutive common shares outstanding during the period and is computed by dividing net income attributable to Huntsman Corporation by the weighted average number of shares outstanding during the period increased by the number of additional shares that would have been outstanding as potential dilutive securities. Diluted income per share is computed using the treasury stock method for all stock-based awards. In periods with reported loss from continuing operations attributable to Huntsman Corporation, all stock-based awards are generally deemed anti-dilutive and would be excluded from the calculation of diluted income per share from continuing operations, discontinued operations and net income regardless of whether there is income or loss from discontinued operations and net income. ​ Basic and diluted loss per share were determined using the following information (in millions):
|  | Three months ended |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss from continuing operations attributable to Huntsman Corporation |  | $ | (4 | ) |  | $ | (159 | ) |  | $ | (56 | ) |  | $ | (163 | )
Net loss attributable to Huntsman Corporation |  | $ | (6 | ) |  | $ | (158 | ) |  | $ | (59 | ) |  | $ | (163 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding |  |  | 173.4 |  |  |  | 172.6 |  |  |  | 173.2 |  |  |  | 172.5 |
Dilutive shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based awards |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total weighted average shares outstanding, including dilutive shares |  |  | 173.4 |  |  |  | 172.6 |  |  |  | 173.2 |  |  |  | 172.5 |
Additional stock-based awards of approximately 4.0 million and 4.8 million weighted average equivalent shares of stock were outstanding during the three months ended June 30, 2026 and 2025, respectively, and approximately 5.0 million and 4.8 million weighted average equivalent shares of stock were outstanding during the six months ended June 30, 2026 and 2025, respectively. However, these stock-based awards were not included in the computation of diluted income per share for the respective periods mentioned above because the effect would be anti-dilutive. For the three months ended June 30, 2026 and 2025, there were 1.0 million and 0.3 million, respectively, weighted average equivalent shares of stock included in the total anti-dilutive weighted average equivalent shares of stock noted above as a result of the reported loss from continuing operations attributable to Huntsman Corporation. For the six months ended June 30, 2026 and 2025, there were 0.7 million and 0.4 million, respectively, weighted average equivalent shares of stock included in the total anti-dilutive weighted average equivalent shares of stock noted above as a result of the reported loss from continuing operations attributable to Huntsman Corporation.

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