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Casella Waste SystemsCWST +0.43%85 Shiller PE Ratio is 171.59 as of Sep. 01, 2026, which is 30% below its 10-year median of 244.47. GuruFocus rates CWST with a GF Score™ of 85/100 and a GF Value™ of $124.17 (Modestly Undervalued). The stock has 7 warning signs investors should review. Among 110 Waste Management companies, Casella Waste Systems ranks worse than 97.27% on this metric.
The historical rank and industry rank for Casella Waste Systems's Shiller PE Ratio or its related term are showing as below:
CWST'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 144.17 Med: 244.47 Max: 4282.5
Current: 171.57
During the past years, Casella Waste Systems's highest Shiller PE Ratio was 4282.50. The lowest was 144.17. And the median was 244.47.
CWST's Shiller PE Ratio is ranked worse than 97.27% of 110
companies
in the Waste Management industry
Industry Median: 20.625
vs CWST: 171.57
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.
Casella Waste Systems's adjusted earnings per share data for the three months ended in Jun. 2026 was $0.060. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.54 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Casella Waste Systems (NAS:CWST) 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.
Casella Waste Systems Shiller PE Ratio Related Terms
Casella Waste Systems Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Casella Waste Systems's Shiller PE Ratio can be seen below:
* 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.
CWST vs SGLA, OIO, NVRI: Shiller PE Ratio Comparison
For the Waste Management subindustry, Casella Waste Systems'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.
Casella Waste Systems Shiller PE Ratio vs Waste Management Industry
For the Waste Management industry and Industrials sector, Casella Waste Systems's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Casella Waste Systems's Shiller PE Ratio falls into.
Casella Waste Systems 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.
Casella Waste Systems (CWST) has a Shiller PE Ratio of 171.59 as of Sep. 01, 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 Casella Waste Systems and its competitors. This is 30% below median its historical median of 244.47. Over the past decade, Casella Waste Systems' Shiller PE Ratio has ranged from 144.17 to 4,282.50. According to the industry distribution chart, Casella Waste Systems ranks #107 out of 110 companies in the Waste Management industry, placing it in the top 97.3%.
Is Casella Waste Systems' Shiller PE Ratio too high?
Casella Waste Systems' current Shiller PE Ratio of 171.59 is 30% below median its 10-year median of 244.47. Over the past 10 years, this metric has ranged from a low of 144.17 to a high of 4,282.50. The Waste Management industry median Shiller PE Ratio is 20.63. Casella Waste Systems' value of 171.59 is 732% above this industry median. Based on the distribution chart, Casella Waste Systems ranks #107 out of 110 companies in the Waste Management industry, which is in the bottom quartile relative to peers. Overall, Casella Waste Systems has a GF Score™ of 85/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Casella Waste Systems' Shiller PE Ratio compare to SGLA and OIO?
According to the Waste Management industry distribution chart, Casella Waste Systems ranks #107 out of 110 companies for Shiller PE Ratio. This places Casella Waste Systems in the lower half of its industry. The industry median Shiller PE Ratio is 20.63. Casella Waste Systems' value of 171.59 is 732% above this benchmark. Historically, Casella Waste Systems' own Shiller PE Ratio has ranged from 144.17 to 4,282.50 over the past decade. While the company's 10-year median is 244.47 vs. the industry median of 20.63, Casella Waste Systems 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 Waste Management company?
The median Shiller PE Ratio among Waste Management companies is 20.63, based on 110 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. Casella Waste Systems's current Shiller PE Ratio of 171.59 is 732% 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 Casella Waste Systems and its competitors. For the Waste Management industry, the median Shiller PE Ratio is 20.63 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Casella Waste Systems's current Shiller PE Ratio is 171.59, which is 30% below median its own 10-year median of 244.47. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Casella Waste Systems stock overvalued right now?
Based on GuruFocus' analysis, Casella Waste Systems (CWST) is currently considered Modestly Undervalued. The stock's GF Value™ is $124.17, compared to a current price of $92.66 — trading 25.4% below its estimated fair value. The current Shiller PE Ratio is 171.59, which is 30% below median its 10-year median of 244.47 and 732% above the Waste Management industry median of 20.63. Casella Waste Systems' overall GF Score™ is 85/100 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 Casella Waste Systems (CWST), the current Shiller PE Ratio is 171.59 as of Sep. 01, 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 Casella Waste Systems (CWST) Overvalued in 2026?
Based on GuruFocus' analysis, Casella Waste Systems stock appears to be undervalued.
The current stock price of $92.66 is trading 25.4% below its estimated GF Value™ of $124.17.
GuruFocus considers Casella Waste Systems to be Modestly Undervalued.
Key valuation signals for CWST:
Shiller PE Ratio: 171.59 (30% below median its 10-year median of 244.47)
GF Value™: $124.17 vs. price of $92.66 (25.4% below fair value)
Industry Position: 732% above the Waste Management median (#107 of 110)
No single metric tells the full story. See the CWST stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Casella Waste Systems Inc is a solid waste removal company, providing resource management services to residential, commercial, municipal, and industrial customers. The company's reportable segments on Geographical basis include Eastern, Western and Mid-Atlantic regions through the Resource solution segment. It generates maximum revenue from the Western region segment. The company's services include Recycling, Collection, Organics, Energy, Landfills, Special Waste as well as Professional Services.
85GF Score
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