Allison Transmission arrived at its second quarter mid-transformation: on January 1, 2026 the largest transaction in its history closed, a roughly $2.6 billion purchase of Dana Incorporated's off-highway business that turned a single-engine commercial-transmission maker into a two-segment industrial company almost overnight. The quarter reads differently depending on which measure is trusted. Revenue nearly doubled, rising 92% to $1,566 million. That headline is real and it is almost entirely the deal - all but a slim slice of the growth came from the newly consolidated Allison Off-Highway unit, while the legacy Allison Transmission business grew just 6%. The ledger underneath said something blunter: GAAP earnings per share fell 6% to $2.15, and net income dropped to $181 million from $195 million, even as sales doubled, because the added revenue carries a thinner margin profile and the acquisition's transitional costs run through the income statement this year. The adjusted EBITDA margin fell by roughly a third, to 26% from 38.5%, on the mix shift.
There are two ways to frame this. The first is that Allison paid up for revenue that, in the near term, dilutes margins and depresses reported earnings, funding the deal with a $1.2 billion incremental term loan and $500 million of new senior notes that pushed net debt to $3,715 million from roughly $1.4 billion. The second is that management is deliberately absorbing one-time integration and stepped-up-basis charges this year, raised its full-year guidance after the quarter, and insists the deal is accretive to earnings even including those costs. Both are true at once. The quarter proved the acquisition transforms the size of the company - and spent most of its extra cash flow cleaning up the purchase and paying down the revolver rather than compounding at the old margins. The defense end market, up 57% in the legacy business, is the clearest organic growth signal; the North American truck market, the core engine, was flat-to-soft in the first half. This is a report about a company betting that a bigger, lower-margin base will eventually earn back the margins it surrendered to buy it.