Allison Transmission closed the largest acquisition in its history on January 1, 2026, paying $2,628 million in cash for the off-highway drivetrain business of Dana Incorporated, and the second-quarter print filed in early August is the first clean look at how the new combined entity performs on a fully consolidated basis. The Q2 2026 numbers, for the three months ended June 30, 2026, are unusually busy: consolidated net sales reached $1,566 million, more than 90% higher than the $814 million reported in the year-ago quarter, and operating income landed at $291 million, up 14% from $256 million a year ago, while diluted earnings per share fell to $2.15 from $2.29 as interest expense more than doubled. The headline story is that Allison Transmission segment, the legacy business, generated $860 million in net sales at a 33% operating margin, while the new Allison Off-Highway segment, which did not exist in 2025, contributed $706 million in revenue and only $47 million of segment operating profit, a margin of roughly 7% net of stepped-up inventory and intangible amortization.
We see Allison Transmission as a fundamentally different company than it was twelve months ago, with revenue nearly doubled, total assets expanded from $6,082 million at year-end 2025 to $8,717 million as of June 30, 2026, and long-term debt up to $4,094 million from $2,885 million, a balance-sheet redesign funded by a $1,200 million incremental term loan, a $500 million senior-notes issuance, $300 million of revolving credit, and roughly $1.1 billion of cash on hand that was sitting idle at year-end 2025. The thesis, in our view, is that Allison paid a real price for diversification, accepting a margin reset in exchange for a doubling of addressable end markets, defense exposure plus heavy commercial plus a full off-highway portfolio spanning construction, agriculture, mining, and industrial.
The single load-bearing risk is execution, the integration of an off-highway business that earned a 7% segment margin in its first two quarters as an Allison subsidiary versus a legacy Allison Transmission margin in the low 30s. If the Off-Highway segment converges toward Allison's traditional gross margin and operating margin over the next two years, the equity earns a re-rating; if it remains at 7%, the equity is fairly valued or expensive. The falsifiable clock is the Q3 2026 print, expected in early November, the first quarter in which Off-Highway margins are no longer distorted by purchase accounting on inventory and fixed assets, providing a clean read on the run-rate earnings power of the combined business.