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Union Plastic PCLBKK:UP 66 PB Ratio is 0.87 as of Jul. 14, 2026, which is 8% below its 10-year median of 0.95. GuruFocus rates BKK:UP with a GF Score™ of 66/100 and a GF Value™ of ฿16.77 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 1,294 Vehicles & Parts companies, Union Plastic PCL ranks better than 66.77% on this metric.
Union Plastic PCL stock PB Ratio (=0.87) is close to 1-year low of 0.82.
The historical rank and industry rank for Union Plastic PCL's PB Ratio or its related term are showing as below:
BKK:UP'
s PB Ratio Range Over the Past 10 Years
Min: 0.56 Med: 0.95 Max: 1.37
Current: 0.87
During the past 13 years, Union Plastic PCL's highest PB Ratio was 1.37. The lowest was 0.56. And the median was 0.95.
BKK:UP's PB Ratio is ranked better than 66.77% of 1294
companies
in the Vehicles & Parts industry
Industry Median: 1.375
vs BKK:UP: 0.87
During the past 12 months, Union Plastic PCL's average Book Value Per Share Growth Rate was 1.10% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 4.90% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 5.90% 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 Union Plastic PCL was 7.20% per year. The lowest was -6.00% per year. And the median was -0.40% 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.
Union Plastic PCL PB Ratio Related Terms
Union Plastic PCL PB Ratio Historical Data
* Premium members only.
The historical data trend for Union Plastic PCL'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 Auto Parts subindustry, Union Plastic PCL'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.
Union Plastic PCL PB Ratio vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Union Plastic PCL's PB Ratio distribution charts can be found below:
* The bar in red indicates where Union Plastic PCL'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.
* 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.
Union Plastic PCL (BKK:UP) has a PB Ratio of 0.87 as of Jul. 14, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Union Plastic PCL and its competitors. This is near median its historical median of 0.95. Over the past decade, Union Plastic PCL's PB Ratio has ranged from 0.56 to 1.37. According to the industry distribution chart, Union Plastic PCL ranks #430 out of 1294 companies in the Vehicles & Parts industry, placing it in the top 33.2%.
Is Union Plastic PCL's PB Ratio too high?
Union Plastic PCL's current PB Ratio of 0.87 is near median its 10-year median of 0.95. Over the past 10 years, this metric has ranged from a low of 0.56 to a high of 1.37. The Vehicles & Parts industry median PB Ratio is 1.38. Union Plastic PCL's value of 0.87 is 36.7% below this industry median. Based on the distribution chart, Union Plastic PCL ranks #430 out of 1294 companies in the Vehicles & Parts industry, which is above the industry midpoint. Overall, Union Plastic PCL has a GF Score™ of 66/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Union Plastic PCL's PB Ratio compare to ORLY and AZO?
According to the Vehicles & Parts industry distribution chart, Union Plastic PCL ranks #430 out of 1294 companies for PB Ratio. This puts Union Plastic PCL in the upper half of its industry. The industry median PB Ratio is 1.38. Union Plastic PCL's value of 0.87 is 36.7% below this benchmark. Historically, Union Plastic PCL's own PB Ratio has ranged from 0.56 to 1.37 over the past decade. While the company's 10-year median is 0.95 vs. the industry median of 1.38, Union Plastic PCL 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 Vehicles & Parts company?
The median PB Ratio among Vehicles & Parts companies is 1.38, based on 1,294 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. Union Plastic PCL's current PB Ratio of 0.87 is 36.7% 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 Union Plastic PCL and its competitors. For the Vehicles & Parts industry, the median PB Ratio is 1.38 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Union Plastic PCL's current PB Ratio is 0.87, which is near median its own 10-year median of 0.95. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Union Plastic PCL stock overvalued right now?
Based on GuruFocus' analysis, Union Plastic PCL (BKK:UP) is currently considered Significantly Overvalued. The stock's GF Value™ is ฿16.77, compared to a current price of ฿23.60 — trading 40.7% above its estimated fair value. The current PB Ratio is 0.87, which is near median its 10-year median of 0.95 and 36.7% below the Vehicles & Parts industry median of 1.38. Union Plastic PCL's overall GF Score™ is 66/100 with 4 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 Union Plastic PCL (BKK:UP), the current PB Ratio is 0.87 as of Jul. 14, 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 Union Plastic PCL (BKK:UP) Overvalued in 2026?
Based on GuruFocus' analysis, Union Plastic PCL stock appears to be overvalued.
The current stock price of ฿23.60 is trading 40.7% above its estimated GF Value™ of ฿16.77.
GuruFocus considers Union Plastic PCL to be Significantly Overvalued.
Key valuation signals for BKK:UP:
PB Ratio: 0.87 (near median its 10-year median of 0.95)
GF Value™: ฿16.77 vs. price of ฿23.60 (40.7% above fair value)
Industry Position: 36.7% below the Vehicles & Parts median (#430 of 1294)
No single metric tells the full story. See the BKK:UP stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Union Plastic PCL is engaged in the manufacturing and distribution of thermoplastics. The company is also involved in the contract manufacture and repair of molds. The reportable segments of company are Manufacture and distribution of thermoplastics and Contract manufacture and repair of molds. The group generates a majority of its revenue from the manufacture and distribution of thermoplastics business.
66GF Score
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