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Amtech SystemsSTU:AS3 -1.50%56 PB Ratio is 2.09 as of Aug. 11, 2026, which is 79% above its 10-year median of 1.17. GuruFocus rates STU:AS3 with a GF Score™ of 56/100 and a GF Value™ of €3.82 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 999 Semiconductors companies, Amtech Systems ranks better than 67.77% on this metric.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. As of today (2026-08-11), Amtech Systems's share price is €13.10. Amtech Systems's Book Value per Share for the quarter that ended in Jun. 2026 was €6.26. Hence, Amtech Systems's PB Ratio of today is 2.09.
The historical rank and industry rank for Amtech Systems's PB Ratio or its related term are showing as below:
STU:AS3'
s PB Ratio Range Over the Past 10 Years
Min: 0.61 Med: 1.17 Max: 6.21
Current: 2.09
During the past 13 years, Amtech Systems's highest PB Ratio was 6.21. The lowest was 0.61. And the median was 1.17.
STU:AS3's PB Ratio is ranked better than 67.77% of 999
companies
in the Semiconductors industry
Industry Median: 3.27
vs STU:AS3: 2.09
During the past 12 months, Amtech Systems's average Book Value Per Share Growth Rate was 99.50% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was -19.10% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was -6.80% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was -1.20% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Amtech Systems was 25.30% per year. The lowest was -23.10% per year. And the median was 1.15% per year.
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
Amtech Systems PB Ratio Related Terms
Amtech Systems PB Ratio Historical Data
* Premium members only.
The historical data trend for Amtech Systems's PB 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.
For the Semiconductor Equipment & Materials subindustry, Amtech Systems's PB Ratio, along with its competitors' market caps and PB 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.
Amtech Systems PB Ratio vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Amtech Systems's PB Ratio distribution charts can be found below:
* The bar in red indicates where Amtech Systems's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
Amtech Systems's PB Ratio for today is calculated as follows:
* 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.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
Amtech Systems (STU:AS3) has a PB Ratio of 2.09 as of Aug. 11, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Amtech Systems and its competitors. This is 79% above median its historical median of 1.17. Over the past decade, Amtech Systems' PB Ratio has ranged from 0.61 to 6.21. According to the industry distribution chart, Amtech Systems ranks #322 out of 999 companies in the Semiconductors industry, placing it in the top 32.2%.
Is Amtech Systems' PB Ratio too high?
Amtech Systems' current PB Ratio of 2.09 is 79% above median its 10-year median of 1.17. Over the past 10 years, this metric has ranged from a low of 0.61 to a high of 6.21. The Semiconductors industry median PB Ratio is 3.27. Amtech Systems' value of 2.09 is 36.1% below this industry median. Based on the distribution chart, Amtech Systems ranks #322 out of 999 companies in the Semiconductors industry, which is above the industry midpoint. Overall, Amtech Systems has a GF Score™ of 56/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Amtech Systems' PB Ratio compare to ATOM and INTT?
According to the Semiconductors industry distribution chart, Amtech Systems ranks #322 out of 999 companies for PB Ratio. This puts Amtech Systems in the upper half of its industry. The industry median PB Ratio is 3.27. Amtech Systems' value of 2.09 is 36.1% below this benchmark. Historically, Amtech Systems' own PB Ratio has ranged from 0.61 to 6.21 over the past decade. While the company's 10-year median is 1.17 vs. the industry median of 3.27, Amtech Systems has consistently been below 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 PB Ratio for a Semiconductors company?
The median PB Ratio among Semiconductors companies is 3.27, based on 999 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Amtech Systems's current PB Ratio of 2.09 is 36.1% below 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 PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Amtech Systems and its competitors. For the Semiconductors industry, the median PB Ratio is 3.27 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Amtech Systems's current PB Ratio is 2.09, which is 79% above median its own 10-year median of 1.17. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Amtech Systems stock overvalued right now?
Based on GuruFocus' analysis, Amtech Systems (STU:AS3) is currently considered Significantly Overvalued. The stock's GF Value™ is €3.82, compared to a current price of €13.10 — trading 242.9% above its estimated fair value. The current PB Ratio is 2.09, which is 79% above median its 10-year median of 1.17 and 36.1% below the Semiconductors industry median of 3.27. Amtech Systems' overall GF Score™ is 56/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For Amtech Systems (STU:AS3), the current PB Ratio is 2.09 as of Aug. 11, 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 Amtech Systems (STU:AS3) Overvalued in 2026?
Based on GuruFocus' analysis, Amtech Systems stock appears to be overvalued.
The current stock price of €13.10 is trading 242.9% above its estimated GF Value™ of €3.82.
GuruFocus considers Amtech Systems to be Significantly Overvalued.
Key valuation signals for STU:AS3:
PB Ratio: 2.09 (79% above median its 10-year median of 1.17)
GF Value™: €3.82 vs. price of €13.10 (242.9% above fair value)
Industry Position: 36.1% below the Semiconductors median (#322 of 999)
No single metric tells the full story. See the STU:AS3 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Amtech Systems Inc provides equipment, consumables and services for semiconductor device packaging, wafer production and device fabrication. Its products are used to fabricate and package GPUs for AI applications, SiC and Si power devices, and other optical, analog and digital devices, and are sold to semiconductor packaging, electronic assembly and device fabrication companies. It operates through two segments: Thermal Processing Solutions, which includes conveyorized reflow equipment, high-temperature conveyorized furnaces and diffusion furnaces with maximum revenue; and Semiconductor Fabrication Solutions, which includes consumables, equipment and services for wafer polishing, dicing and cleaning. The majority of revenue is derived from the United States.
56GF Score
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