West Pharmaceutical ServicesWST +1.20%95 PB Ratio is 8.07 as of Jun. 24, 2026, which is 10% above its 10-year median of 7.35. GuruFocus rates WST with a GF Score™ of 95/100 and a GF Value™ of $361.52 (Fairly Valued). The stock has 9 warning signs investors should review. Among 787 Medical Devices & Instruments companies, West Pharmaceutical Services ranks worse than 88.44% on this metric.
West Pharmaceutical Services Inc stock PB Ratio (=7.98) is close to 1-year high of 7.98.
The historical rank and industry rank for West Pharmaceutical Services's PB Ratio or its related term are showing as below:
WST'
s PB Ratio Range Over the Past 10 Years
Min: 4.59 Med: 7.35 Max: 16.91
Current: 8.07
During the past 13 years, West Pharmaceutical Services's highest PB Ratio was 16.91. The lowest was 4.59. And the median was 7.35.
WST's PB Ratio is ranked worse than 88.44% of 787
companies
in the Medical Devices & Instruments industry
Industry Median: 2.04
vs WST: 8.07
During the past 12 months, West Pharmaceutical Services's average Book Value Per Share Growth Rate was 12.90% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 6.80% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 10.20% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 12.90% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of West Pharmaceutical Services was 19.50% per year. The lowest was -7.00% per year. And the median was 8.90% per year.
Back to Basics: PB Ratio
West Pharmaceutical Services (NYSE:WST) PB Ratio Explanation
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.
West Pharmaceutical Services PB Ratio Related Terms
West Pharmaceutical Services PB 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.
For the Medical Instruments & Supplies subindustry, West Pharmaceutical Services'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.
West Pharmaceutical Services PB Ratio vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, West Pharmaceutical Services's PB Ratio distribution charts can be found below:
* The bar in red indicates where West Pharmaceutical Services'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.
West Pharmaceutical Services (WST) has a PB Ratio of 8.07 as of Jun. 24, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on West Pharmaceutical Services and its competitors. This is 10% above median its historical median of 7.35. Over the past decade, West Pharmaceutical Services' PB Ratio has ranged from 4.59 to 16.91. According to the industry distribution chart, West Pharmaceutical Services ranks #696 out of 787 companies in the Medical Devices & Instruments industry, placing it in the top 88.4%.
Is West Pharmaceutical Services' PB Ratio too high?
West Pharmaceutical Services' current PB Ratio of 8.07 is 10% above median its 10-year median of 7.35. Over the past 10 years, this metric has ranged from a low of 4.59 to a high of 16.91. The Medical Devices & Instruments industry median PB Ratio is 2.04. West Pharmaceutical Services' value of 8.07 is 295.6% above this industry median. Based on the distribution chart, West Pharmaceutical Services ranks #696 out of 787 companies in the Medical Devices & Instruments industry, which is in the bottom quartile relative to peers. Overall, West Pharmaceutical Services has a GF Score™ of 95/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does West Pharmaceutical Services' PB Ratio compare to RMD and MDLN?
According to the Medical Devices & Instruments industry distribution chart, West Pharmaceutical Services ranks #696 out of 787 companies for PB Ratio. This places West Pharmaceutical Services in the lower half of its industry. The industry median PB Ratio is 2.04. West Pharmaceutical Services' value of 8.07 is 295.6% above this benchmark. Historically, West Pharmaceutical Services' own PB Ratio has ranged from 4.59 to 16.91 over the past decade. While the company's 10-year median is 7.35 vs. the industry median of 2.04, West Pharmaceutical Services 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 PB Ratio for a Medical Devices & Instruments company?
The median PB Ratio among Medical Devices & Instruments companies is 2.04, based on 787 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. West Pharmaceutical Services's current PB Ratio of 8.07 is 295.6% 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 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 West Pharmaceutical Services and its competitors. For the Medical Devices & Instruments industry, the median PB Ratio is 2.04 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. West Pharmaceutical Services's current PB Ratio is 8.07, which is 10% above median its own 10-year median of 7.35. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is West Pharmaceutical Services stock overvalued right now?
Based on GuruFocus' analysis, West Pharmaceutical Services (WST) is currently considered Fairly Valued. The stock's GF Value™ is $361.52, compared to a current price of $340.41 — trading 5.8% below its estimated fair value. The current PB Ratio is 8.07, which is 10% above median its 10-year median of 7.35 and 295.6% above the Medical Devices & Instruments industry median of 2.04. West Pharmaceutical Services' overall GF Score™ is 95/100 with 9 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 West Pharmaceutical Services (WST), the current PB Ratio is 8.07 as of Jun. 24, 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 West Pharmaceutical Services (WST) Overvalued in 2026?
Based on GuruFocus' analysis, West Pharmaceutical Services stock appears to be undervalued.
The current stock price of $340.41 is trading 5.8% below its estimated GF Value™ of $361.52.
GuruFocus considers West Pharmaceutical Services to be Fairly Valued.
Key valuation signals for WST:
PB Ratio: 8.07 (10% above median its 10-year median of 7.35)
GF Value™: $361.52 vs. price of $340.41 (5.8% below fair value)
Industry Position: 295.6% above the Medical Devices & Instruments median (#696 of 787)
No single metric tells the full story. See the WST stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
West Pharmaceutical Services is based in Pennsylvania and is a key supplier to firms in the pharmaceutical, biotechnology, and generic drug industries. West sells elastomer-based packaging components (including stoppers, seals, and plungers), nonglass containment solutions, and auto-injectors for injectable drugs, which include large-molecule biologics, peptides such as GLP-1 receptor agonists, and small-molecule drugs. The company reports in two segments: proprietary products (about 80% of total revenue) and contract-manufactured products (about 20% of total revenue). It generates approximately 55% of its revenue from international markets and 45% from the United States.
95GF Score
Get the complete analysis for WST
PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
WST has been successfully added to your 
