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Earnings (Loss) Per Share | 12 Months Ended
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Oct. 03, 2025
Earnings Per Share [Abstract] |
Earnings (Loss) Per Share | Earnings (Loss) Per Share For the periods prior to September 27, 2024, the Company retrospectively adjusted the weighted average shares used in determining loss per share to reflect the conversion of the ownership interests of Amentum Parent Holdings LLC held by AJVLP that converted into 90,021,804 shares of the Company’s common stock at Transaction close. As discussed in Note 11 — Stock-Based Compensation certain employees of the Company were granted stock-based compensation in the form of Class B Time-Vested and Performance-Vested units of AJVLP. The compensation expense associated with such awards is recognized in the Company’s financial statements, however as such shares represent outstanding equity of AJVLP, and not of the Company, such awards do not impact the Company’s calculation of the weighted average shares outstanding. For the year ended September 27, 2024, Jacobs’ restricted stock units converted to Amentum time-based restricted stock were excluded from the computation of diluted loss per share because inclusion of these amounts would have had an anti-dilutive effect. There were no anti-dilutive shares in fiscal year 2025 or 2023. Basic and diluted earnings (loss) per share are computed as follows (in millions, except per share data):
|  | For the years ended
|  | October 3, 2025 |  | September 27, 2024 |  | September 29, 2023
Net income (loss) attributable to common shareholders |  | $ | 66 |  |  | $ | (82) |  |  | $ | (314) |
Weighted-average number of basic shares outstanding during the period |  | 243 |  | 91 |  | 90
Dilutive effect of RSUs |  | 1 |  | — |  |  | — |
Weighted-average number of diluted shares outstanding during the period |  | 244 |  | 91 |  | 90
Basic earnings (loss) per share |  | $ | 0.27 |  |  | $ | (0.90) |  |  | $ | (3.49) |
Diluted earnings (loss) per share |  | $ | 0.27 |  |  | $ | (0.90) |  |  | $ | (3.49) |

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