Is Allison Transmission Holdings (ALSN) Still Undervalued As Strong Results Lifted Guidance?

Why Allison Transmission Holdings Stock Is Back In Focus

Allison Transmission Holdings (ALSN) is back on investors' radar after second quarter 2026 results showed record quarterly sales, new defense contracts, and higher full year guidance following its off highway business integration.

The company reported second quarter sales of US$1,566 million compared with US$814 million a year earlier, supported by defense orders including a US$250 million 4040 MX transmission contract and programs for over 7,000 French Land Forces vehicles.

See our latest analysis for Allison Transmission Holdings.

Allison Transmission Holdings' latest earnings, higher full year guidance and ongoing share repurchases appear to be feeding into solid momentum, with the stock posting a 9.44% 1 month share price return and a 5 year total shareholder return of 257.63%.

If these defense and off highway headlines have you thinking about where else growth could come from, it can be worth scanning 37 power grid technology and infrastructure stocks

After Allison Transmission Holdings' strong run and raised guidance, the stock still sits below both internal fair value estimates and the average analyst target. Is that a sensible safety margin, or is the market questioning the durability of this upswing?

Most Popular Narrative: 10.3% Undervalued

The most followed valuation narrative for Allison Transmission Holdings sets fair value at $139.40 versus a last close of $124.99. That gap rests on some punchy assumptions about growth, margins and cash generation.

The recently announced acquisition of Dana's Off-Highway business materially expands Allison's global footprint, diversifies its end markets to include agriculture and construction, and is expected to drive significant operational and cost synergies ($120 million annual run rate). This is cited as supporting both revenue growth and margin enhancement over the next 4 years. Allison's increasing penetration into electrified and alternative-fuel powertrain segments, evidenced by orders for its eGen Flex hybrid bus systems and eGen Force electrified defense transmissions, is presented as positioning the company to capture demand driven by tightening emissions regulations and the global focus on fleet efficiency. This is framed as supporting long-term revenue streams from new and differentiated products.

Read the complete narrative.

Want to see how this acquisition story, electrified products and margin ambitions all feed into that fair value number? The narrative leans on specific growth rates, rising profitability and a future earnings multiple that might surprise investors used to traditional industrials. It raises questions about which assumptions really move the model and how sensitive the outcome is to small changes.

Result: Fair Value of $139.40 (UNDERVALUED)

Have a read of the narrative in full and understand what's behind the forecasts.

However, Allison Transmission Holdings still faces execution risk around the Dana Off Highway integration and potential pressure if the North America On Highway market remains soft.

Find out about the key risks to this Allison Transmission Holdings narrative.

Next Steps

If this mix of optimism and caution around Allison Transmission Holdings leaves you on the fence, treat that as a signal to inspect the data yourself and move quickly while the narrative is still taking shape. To weigh the balance of concerns and positives in one place, start with the 3 key rewards and 2 important warning signs.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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