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Allison Transmission HoldingsALSN +2.18%96 Shiller PE Ratio is 21.51 as of Sep. 07, 2026, which is 37% above its 10-year median of 15.69. GuruFocus rates ALSN with a GF Score™ of 96/100 and a GF Value™ of $148.01 (Modestly Undervalued). The stock has 7 warning signs investors should review. Among 848 Vehicles & Parts companies, Allison Transmission Holdings ranks worse than 53.54% on this metric.
The historical rank and industry rank for Allison Transmission Holdings's Shiller PE Ratio or its related term are showing as below:
ALSN'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 10.36 Med: 15.69 Max: 25.08
Current: 21.52
During the past years, Allison Transmission Holdings's highest Shiller PE Ratio was 25.08. The lowest was 10.36. And the median was 15.69.
ALSN's Shiller PE Ratio is ranked worse than 53.54% of 848
companies
in the Vehicles & Parts industry
Industry Median: 19.46
vs ALSN: 21.52
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Allison Transmission Holdings's adjusted earnings per share data for the three months ended in Jun. 2026 was $2.150. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $6.10 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Allison Transmission Holdings (NYSE:ALSN) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Allison Transmission Holdings Shiller PE Ratio Related Terms
Allison Transmission Holdings Shiller PE Ratio Historical Data
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Allison Transmission Holdings Shiller PE Ratio Chart
ALSN vs APTV, MOD, AUR: Shiller PE Ratio Comparison
For the Auto Parts subindustry, Allison Transmission Holdings's Shiller PE Ratio, along with its competitors' market caps and Shiller PE Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Allison Transmission Holdings Shiller PE Ratio vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Allison Transmission Holdings's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Allison Transmission Holdings's Shiller PE Ratio falls into.
Allison Transmission Holdings Shiller PE Ratio Calculation
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
Allison Transmission Holdings (ALSN) has a Shiller PE Ratio of 21.51 as of Sep. 07, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Allison Transmission Holdings and its competitors. This is 37% above median its historical median of 15.69. Over the past decade, Allison Transmission Holdings' Shiller PE Ratio has ranged from 10.36 to 25.08. According to the industry distribution chart, Allison Transmission Holdings ranks #454 out of 848 companies in the Vehicles & Parts industry, placing it in the top 53.5%.
Is Allison Transmission Holdings' Shiller PE Ratio too high?
Allison Transmission Holdings' current Shiller PE Ratio of 21.51 is 37% above median its 10-year median of 15.69. Over the past 10 years, this metric has ranged from a low of 10.36 to a high of 25.08. The Vehicles & Parts industry median Shiller PE Ratio is 19.46. Allison Transmission Holdings' value of 21.51 is 10.5% above this industry median. Based on the distribution chart, Allison Transmission Holdings ranks #454 out of 848 companies in the Vehicles & Parts industry, which is below the industry midpoint. Overall, Allison Transmission Holdings has a GF Score™ of 96/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Allison Transmission Holdings' Shiller PE Ratio compare to APTV and MOD?
According to the Vehicles & Parts industry distribution chart, Allison Transmission Holdings ranks #454 out of 848 companies for Shiller PE Ratio. This places Allison Transmission Holdings in the lower half of its industry. The industry median Shiller PE Ratio is 19.46. Allison Transmission Holdings' value of 21.51 is 10.5% above this benchmark. Historically, Allison Transmission Holdings' own Shiller PE Ratio has ranged from 10.36 to 25.08 over the past decade. While the company's 10-year median is 15.69 vs. the industry median of 19.46, Allison Transmission Holdings has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shiller PE Ratio for a Vehicles & Parts company?
The median Shiller PE Ratio among Vehicles & Parts companies is 19.46, based on 848 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Allison Transmission Holdings's current Shiller PE Ratio of 21.51 is 10.5% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Allison Transmission Holdings and its competitors. For the Vehicles & Parts industry, the median Shiller PE Ratio is 19.46 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Allison Transmission Holdings's current Shiller PE Ratio is 21.51, which is 37% above median its own 10-year median of 15.69. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Allison Transmission Holdings stock overvalued right now?
Based on GuruFocus' analysis, Allison Transmission Holdings (ALSN) is currently considered Modestly Undervalued. The stock's GF Value™ is $148.01, compared to a current price of $131.24 — trading 11.3% below its estimated fair value. The current Shiller PE Ratio is 21.51, which is 37% above median its 10-year median of 15.69 and 10.5% above the Vehicles & Parts industry median of 19.46. Allison Transmission Holdings' overall GF Score™ is 96/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Allison Transmission Holdings (ALSN), the current Shiller PE Ratio is 21.51 as of Sep. 07, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Allison Transmission Holdings (ALSN) Overvalued in 2026?
Based on GuruFocus' analysis, Allison Transmission Holdings stock appears to be undervalued.
The current stock price of $131.24 is trading 11.3% below its estimated GF Value™ of $148.01.
GuruFocus considers Allison Transmission Holdings to be Modestly Undervalued.
Key valuation signals for ALSN:
Shiller PE Ratio: 21.51 (37% above median its 10-year median of 15.69)
GF Value™: $148.01 vs. price of $131.24 (11.3% below fair value)
Industry Position: 10.5% above the Vehicles & Parts median (#454 of 848)
No single metric tells the full story. See the ALSN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Allison Transmission is the largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles. Its automatic transmissions allow customers to achieve better fuel and operator efficiency than less expensive manual and automated manual transmissions. Allison serves several end markets, including on- and off-highway equipment and military vehicles. Its on-highway business commands approximately 60% global market share. The company's transmissions can be found in Class 4-8 trucks, buses, and a limited number of large passenger vehicles (heavy-duty pickup trucks and motorhomes). Allison also produces commercial hybrid propulsion systems and is developing fully electric powertrains.
96GF Score
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