Gulf Marine ServicesLSE:GMS +1.41%55 PB Ratio is 0.69 as of Jun. 27, 2026, which is 73% above its 10-year median of 0.40. GuruFocus rates LSE:GMS with a GF Score™ of 55/100 and a GF Value™ of £0.17 (Fairly Valued). The stock has 3 warning signs investors should review. Among 923 Oil & Gas companies, Gulf Marine Services ranks better than 79.74% on this metric.
The historical rank and industry rank for Gulf Marine Services's PB Ratio or its related term are showing as below:
LSE:GMS'
s PB Ratio Range Over the Past 10 Years
Min: 0.04 Med: 0.4 Max: 0.94
Current: 0.69
During the past 13 years, Gulf Marine Services's highest PB Ratio was 0.94. The lowest was 0.04. And the median was 0.40.
LSE:GMS's PB Ratio is ranked better than 79.74% of 923
companies
in the Oil & Gas industry
Industry Median: 1.39
vs LSE:GMS: 0.69
During the past 12 months, Gulf Marine Services's average Book Value Per Share Growth Rate was -3.60% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 5.50% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 2.70% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was -10.60% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Gulf Marine Services was 47.20% per year. The lowest was -32.20% per year. And the median was 5.25% per year.
Back to Basics: PB Ratio
Gulf Marine Services (LSE:GMS) 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.
Gulf Marine Services PB Ratio Related Terms
Gulf Marine Services PB Ratio Historical Data
* Premium members only.
The historical data trend for Gulf Marine Services'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 Oil & Gas Equipment & Services subindustry, Gulf Marine 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.
Gulf Marine Services PB Ratio vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Gulf Marine Services's PB Ratio distribution charts can be found below:
* The bar in red indicates where Gulf Marine 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.
Gulf Marine Services (LSE:GMS) has a PB Ratio of 0.69 as of Jun. 27, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Gulf Marine Services and its competitors. This is 73% above median its historical median of 0.40. Over the past decade, Gulf Marine Services' PB Ratio has ranged from 0.04 to 0.94. According to the industry distribution chart, Gulf Marine Services ranks #187 out of 923 companies in the Oil & Gas industry, placing it in the top 20.3%.
Is Gulf Marine Services' PB Ratio too high?
Gulf Marine Services' current PB Ratio of 0.69 is 73% above median its 10-year median of 0.40. Over the past 10 years, this metric has ranged from a low of 0.04 to a high of 0.94. The Oil & Gas industry median PB Ratio is 1.39. Gulf Marine Services' value of 0.69 is 50.4% below this industry median. Based on the distribution chart, Gulf Marine Services ranks #187 out of 923 companies in the Oil & Gas industry, which is in the top quartile — a strong position relative to peers. Overall, Gulf Marine Services has a GF Score™ of 55/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Gulf Marine Services' PB Ratio compare to SLB and BKR?
According to the Oil & Gas industry distribution chart, Gulf Marine Services ranks #187 out of 923 companies for PB Ratio. This places Gulf Marine Services in the top 20% of its industry — outperforming the majority of peers. The industry median PB Ratio is 1.39. Gulf Marine Services' value of 0.69 is 50.4% below this benchmark. Historically, Gulf Marine Services' own PB Ratio has ranged from 0.04 to 0.94 over the past decade. While the company's 10-year median is 0.40 vs. the industry median of 1.39, Gulf Marine Services 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 an Oil & Gas company?
The median PB Ratio among Oil & Gas companies is 1.39, based on 923 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. Gulf Marine Services's current PB Ratio of 0.69 is 50.4% 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 Gulf Marine Services and its competitors. For the Oil & Gas industry, the median PB Ratio is 1.39 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Gulf Marine Services's current PB Ratio is 0.69, which is 73% above median its own 10-year median of 0.40. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Gulf Marine Services stock overvalued right now?
Based on GuruFocus' analysis, Gulf Marine Services (LSE:GMS) is currently considered Fairly Valued. The stock's GF Value™ is £0.17, compared to a current price of £0.19 — trading 9.6% above its estimated fair value. The current PB Ratio is 0.69, which is 73% above median its 10-year median of 0.40 and 50.4% below the Oil & Gas industry median of 1.39. Gulf Marine Services' overall GF Score™ is 55/100 with 3 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 Gulf Marine Services (LSE:GMS), the current PB Ratio is 0.69 as of Jun. 27, 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 Gulf Marine Services (LSE:GMS) Overvalued in 2026?
Based on GuruFocus' analysis, Gulf Marine Services stock appears to be overvalued.
The current stock price of £0.19 is trading 9.6% above its estimated GF Value™ of £0.17.
GuruFocus considers Gulf Marine Services to be Fairly Valued.
Key valuation signals for LSE:GMS:
PB Ratio: 0.69 (73% above median its 10-year median of 0.40)
GF Value™: £0.17 vs. price of £0.19 (9.6% above fair value)
Industry Position: 50.4% below the Oil & Gas median (#187 of 923)
No single metric tells the full story. See the LSE:GMS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Gulf Marine Services PLC is a United Kingdom-based operator of self-propelled and self-elevating support vessels (SESVs). Its assets provide a stable platform for the delivery of a range of services performed by the company's clients throughout the total lifecycle of offshore oil, gas, and renewable energy activities. Its operating business segments include Six K-Class vessels, which include the Kamikaze, Kikuyu, Kawawa, Kudeta, Keloa, and Pepper vessels; Three S-Class vessels, which include the Shamal, Scirocco, and Sharqi vessels; Five E-Class vessels, which include the Endeavour, Endurance, Enterprise, and Evolution vessels; and the Other vessels segment.
55GF Score
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