Arqit QuantumSTU:3D6 -10.09%27 PB Ratio is 11.60 as of Jul. 08, 2026, which is 73% above its 10-year median of 6.72. GuruFocus rates STU:3D6 with a GF Score™ of 27/100 and a GF Value™ of €9.91 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 2,626 Software companies, Arqit Quantum ranks worse than 91.7% 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 (2026-07-08), Arqit Quantum's share price is €17.25. Arqit Quantum's Book Value per Share for the quarter that ended in Mar. 2026 was €1.49. Hence, Arqit Quantum's PB Ratio of today is 11.60.
The historical rank and industry rank for Arqit Quantum's PB Ratio or its related term are showing as below:
STU:3D6'
s PB Ratio Range Over the Past 10 Years
Min: 0.49 Med: 6.72 Max: 41.69
Current: 11.55
During the past 7 years, Arqit Quantum's highest PB Ratio was 41.69. The lowest was 0.49. And the median was 6.72.
STU:3D6's PB Ratio is ranked worse than 91.7% of 2626
companies
in the Software industry
Industry Median: 2.42
vs STU:3D6: 11.55
During the past 12 months, Arqit Quantum's average Book Value Per Share Growth Rate was 45.10% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was -52.00% per year.
During the past 7 years, the highest 3-Year average Book Value Per Share Growth Rate of Arqit Quantum was 277.30% per year. The lowest was -52.00% per year. And the median was 264.20% 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.
Arqit Quantum PB Ratio Related Terms
Arqit Quantum PB Ratio Historical Data
* Premium members only.
The historical data trend for Arqit Quantum'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 Software - Infrastructure subindustry, Arqit Quantum'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.
Arqit Quantum PB Ratio vs Software Industry
For the Software industry and Technology sector, Arqit Quantum's PB Ratio distribution charts can be found below:
* The bar in red indicates where Arqit Quantum'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.
Arqit Quantum'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.
Arqit Quantum (STU:3D6) has a PB Ratio of 11.60 as of Jul. 08, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Arqit Quantum and its competitors. This is 73% above median its historical median of 6.72. Over the past decade, Arqit Quantum's PB Ratio has ranged from 0.49 to 41.69. According to the industry distribution chart, Arqit Quantum ranks #2408 out of 2626 companies in the Software industry, placing it in the top 91.7%.
Is Arqit Quantum's PB Ratio too high?
Arqit Quantum's current PB Ratio of 11.60 is 73% above median its 10-year median of 6.72. Over the past 10 years, this metric has ranged from a low of 0.49 to a high of 41.69. The Software industry median PB Ratio is 2.42. Arqit Quantum's value of 11.60 is 379.3% above this industry median. Based on the distribution chart, Arqit Quantum ranks #2408 out of 2626 companies in the Software industry, which is in the bottom quartile relative to peers. Overall, Arqit Quantum has a GF Score™ of 27/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Arqit Quantum's PB Ratio compare to IIIV and IMXI?
According to the Software industry distribution chart, Arqit Quantum ranks #2408 out of 2626 companies for PB Ratio. This places Arqit Quantum in the lower half of its industry. The industry median PB Ratio is 2.42. Arqit Quantum's value of 11.60 is 379.3% above this benchmark. Historically, Arqit Quantum's own PB Ratio has ranged from 0.49 to 41.69 over the past decade. While the company's 10-year median is 6.72 vs. the industry median of 2.42, Arqit Quantum 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 Software company?
The median PB Ratio among Software companies is 2.42, based on 2,626 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. Arqit Quantum's current PB Ratio of 11.60 is 379.3% 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 Arqit Quantum and its competitors. For the Software industry, the median PB Ratio is 2.42 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Arqit Quantum's current PB Ratio is 11.60, which is 73% above median its own 10-year median of 6.72. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Arqit Quantum stock overvalued right now?
Based on GuruFocus' analysis, Arqit Quantum (STU:3D6) is currently considered Significantly Overvalued. The stock's GF Value™ is €9.91, compared to a current price of €17.25 — trading 74.1% above its estimated fair value. The current PB Ratio is 11.60, which is 73% above median its 10-year median of 6.72 and 379.3% above the Software industry median of 2.42. Arqit Quantum's overall GF Score™ is 27/100 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 Arqit Quantum (STU:3D6), the current PB Ratio is 11.60 as of Jul. 08, 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 Arqit Quantum (STU:3D6) Overvalued in 2026?
Based on GuruFocus' analysis, Arqit Quantum stock appears to be overvalued.
The current stock price of €17.25 is trading 74.1% above its estimated GF Value™ of €9.91.
GuruFocus considers Arqit Quantum to be Significantly Overvalued.
Key valuation signals for STU:3D6:
PB Ratio: 11.60 (73% above median its 10-year median of 6.72)
GF Value™: €9.91 vs. price of €17.25 (74.1% above fair value)
Industry Position: 379.3% above the Software median (#2408 of 2626)
No single metric tells the full story. See the STU:3D6 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Arqit Quantum Inc is a cybersecurity company that has pioneered a symmetric key agreement technology that makes the communications links of any networked device or data at rest secure against current and future forms of cyber attack - even an attack from a quantum computer. The company delivers its symmetric key agreement technology via its product SKA-Platform. The firm operates in one segment, that is, the provision of cybersecurity services. The company operates and generates its revenue from UK.
27GF Score
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