Allison Transmission Holdings ALSN Goodwill impairment

The Company elected to perform a Step 1 quantitative impairment analysis of goodwill in 2025, which indicated that the fair value of the reporting unit exceeded its carrying value, indicating no impairment. The fair value was determined utilizing a discounted cash flow model, which includes key assumptions such as net sales growth derived from market information, industry reports, marketing programs and certain growth initiatives; operating margin improvements derived from cost reduction programs and fixed cost leverage driven by higher sales volumes; and a risk-adjusted discount rate. Events or circumstances that could unfavorably impact the key assumptions include lower net sales driven by market conditions, our inability to execute on marketing programs and/or growth initiatives, lower gross margins as a result of market conditions or failure to obtain forecasted cost reductions, or a higher discount rate as a result of market conditions. While unpredictable and inherently uncertain, management believes the forecast estimates were reasonable and incorporate assumptions that similar market participants would use in their estimates of fair value.