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Loss Per Share | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Loss Per Share | 9. Loss Per Share Calculations of net loss per common share were as follows (in thousands, except per share amounts):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net loss |  | $ | (14,124 | ) |  | $ | (24,917 | ) |  | $ | (51,898 | ) |  | $ | (33,165 | )
Basic weighted average common shares outstanding |  |  | 41,873 |  |  |  | 41,322 |  |  |  | 41,551 |  |  |  | 41,203 |
Diluted weighted average common shares outstanding |  |  | 41,873 |  |  |  | 41,322 |  |  |  | 41,551 |  |  |  | 41,203 |
Net loss per common share attributable to Mesa Air Group: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.34 | ) |  | $ | (0.60 | ) |  | $ | (1.25 | ) |  | $ | (0.80 | )
Diluted |  | $ | (0.34 | ) |  | $ | (0.60 | ) |  | $ | (1.25 | ) |  | $ | (0.80 | )
Basic income or loss per common share is computed by dividing net income or loss attributable to Mesa Air Group by the weighted average number of common shares outstanding during the period. The number of incremental shares from the assumed issuance of shares relating to restricted stock and exercise of warrants is calculated by applying the treasury stock method. Share-based awards and warrants whose impact is anti-dilutive under the treasury stock method are excluded from the diluted net income or loss per share calculation. In loss periods, these incremental shares are excluded from the calculation of diluted loss per share, as the inclusion of approximately 1.0 million unvested restricted shares and 4.9 million warrants would have an anti-dilutive effect. The following number of weighted-average potentially dilutive shares were excluded from the calculation of diluted net loss per share because the effect of including such potentially dilutive shares would have been anti-dilutive:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Warrants |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Restricted stock |  |  | 32 |  |  |  | — |  |  |  | 91 |  |  |  | — |
|  |  | 32 |  |  |  | — |  |  |  | 91 |  |  |  | — |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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