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1. Composite Trajectory Verdict

All three financial statements carry roughly equal weight for ALSN given its capital-intensive manufacturing model, significant debt obligations, and the transformative Dana acquisition that simultaneously impacts profitability, cash generation, and leverage.

Composite Trajectory: Mixed

The annual income statement shows deterioration in 2025 versus 2024 (net sales -7%, net income -15%, operating income -11%), though 2024 was stronger than 2023. Quarterly consolidated results are not comparable year-over-year due to the January 1, 2026 acquisition; the legacy Allison Transmission segment shows nearly flat sales (+1% six months) but declining operating profit (-5% six months). Cash generation is improving on both annual (operating cash flow $784M→$801M→$836M) and quarterly (six-month operating cash flow $365M→$468M) bases. The balance sheet is mixed: annual leverage remained negative (-0.87x first lien net leverage at Dec 2025) despite higher debt, but quarterly leverage jumped to 1.01x at June 2026 with cash falling from $1,495M to $399M to fund the acquisition.

2. Red Flags

• Net income declined 15% year-over-year in 2025 ($623M vs $731M) alongside a 7% revenue decline ($3,010M vs $3,225M) (10-K 2025-12-31, Consolidated Statements of Comprehensive Income)
• Consolidated gross margin compressed 16.6 percentage points in Q2 2026 (32.9% vs 49.5% in Q2 2025) due to the lower-margin Off-Highway segment (10-Q 2026-06-30, MD&A Results of Operations)
• First lien net leverage ratio increased from -0.87x at December 31, 2025 to 1.01x at June 30, 2026 as cash dropped from $1,495M to $399M and incremental term loan of $1,200M was added (10-K 2025-12-31, Liquidity; 10-Q 2026-06-30, Liquidity)
• Acquisition-related expenses recur across periods: $64M in FY2025, $26M in six months 2026, $24M in six months 2025 (10-K 2025-12-31, Non-GAAP reconciliation; 10-Q 2026-06-30, Non-GAAP reconciliation)
• Impairment charges on electrified product assets rose to $29M in 2025 from $1M in 2024 (10-K 2025-12-31, Results of Operations; Note 5, Note 6)
• Effective tax rate jumped to 23% in 2025 from 19% in 2024, driven by elections under the One Big Beautiful Bill Act (10-K 2025-12-31, Income tax expense)
• Allison Transmission segment operating profit declined 5% in the first six months of 2026 versus 2025 ($533M vs $559M) on only 1% sales growth (10-Q 2026-06-30, Operating Segment Results)

3. Earnings Assessment (Income Statement)

Earnings Trajectory: Mixed

Annual GAAP results show a clear downturn in 2025 versus 2024: net sales fell 7% to $3,010M, operating income fell 11% to $880M, and net income fell 15% to $623M (10-K 2025-12-31, Consolidated Statements of Comprehensive Income). Gross margin improved 120 basis points to 48.6% on price increases and lower incentive costs, but SG&A rose 13% to $380M including $64M of acquisition costs, and a $29M impairment charge was recorded (10-K 2025-12-31, MD&A). Quarterly consolidated comparisons are distorted by the acquisition; the legacy Allison Transmission segment generated $1,593M sales (+1%) but $533M operating profit (-5%) in the first six months of 2026 versus 2025 (10-Q 2026-06-30, Operating Segment Results).

4. Cash Generation Assessment (Statement of Cash Flows)

Cash Trajectory: Improving

Annual operating cash flow has risen each year: $784M (2023) → $801M (2024) → $836M (2025) (10-K 2025-12-31, Consolidated Statements of Cash Flows). Non-GAAP adjusted free cash flow was stable at $659M→$658M→$661M over the same period (10-K 2025-12-31, Non-GAAP reconciliation). Quarterly, six-month operating cash flow increased 28% to $468M in 2026 versus $365M in 2025, and adjusted free cash flow rose 25% to $384M versus $308M, despite $41M of acquisition-related payments in 2026 versus $17M in 2025 (10-Q 2026-06-30, Non-GAAP reconciliation). Capital expenditures increased to $175M in 2025 from $143M in 2024 and $84M in six months 2026 from $57M in 2025 (10-K 2025-12-31; 10-Q 2026-06-30, Cash Flows).

5. Balance Sheet Assessment

Balance Sheet Trajectory: Mixed

At December 31, 2025, total assets were $6,082M versus $5,336M a year earlier, cash was $1,495M versus $781M, and long-term debt was $2,885M versus $2,395M (10-K 2025-12-31, Consolidated Balance Sheets). The first lien net leverage ratio was -0.87x (negative due to cash exceeding first-lien debt) (10-K 2025-12-31, Liquidity). By June 30, 2026, post-acquisition, cash fell to $399M, the incremental term loan ($1,197M) and revolver borrowings ($300M drawn, fully repaid) were added, and first lien net leverage rose to 1.01x (10-Q 2026-06-30, Liquidity). Stockholders' equity grew to $1,867M at December 2025 from $1,651M at December 2024, driven by net income less dividends and buybacks (10-K 2025-12-31, Consolidated Statements of Stockholders' Equity).

6. Data Gaps

• Standalone Q1 2026 and Q1 2025 income statement and cash flow figures (only six-month and Q2 data provided in 10-Q)
• Full-year 2026 guidance or outlook beyond qualitative statements in MD&A
• Completed purchase price allocation for the Dana Off-Highway acquisition (preliminary allocation not yet finalized as of 10-Q filing)
• Segment-level cash flows and balance sheets for Allison Transmission vs Allison Off-Highway
• Quarterly trends for 2024 and earlier (only 2025 and 2026 quarterly data provided)