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Daily valuation snapshot
Arqit Quantum Inc. Ordinary Shares: source evidence dated 2026-10-09.
- Daily close (USD)
- $17.23
- Market capitalization (USD)
- $299,843,541.53
- Price / earnings (TTM)
- Not reported
- Price / book
- 11.01
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Company overview
Arqit Quantum Inc. provides cybersecurity services through satellite and terrestrial platforms in the United Kingdom. It offers QuantumCloud, a Platform as a Service that creates unbreakable software encryption keys. The company also provides maintenance and support, and professional services. Arqit Quantum Inc. is based in London, the United Kingdom.
Daily valuation snapshot
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These values come from the daily market snapshot dated 2026-10-09. TTM means trailing twelve months. Use the market date when comparing ARQQ with another company.
| Daily close (USD) | $17.23 |
| Market capitalization (USD) | $299,843,541.53 |
| Price / earnings (TTM) | Not reported |
| Price / book | 11.01 |
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Company size
Arqit Quantum Inc. Ordinary Shares's recorded market capitalization is $299,843,541.53. It measures the market value of the company's equity, rather than its revenue or cash balance.
Price relative to earnings
P/E compares share price with trailing annual earnings per share. For a company with losses, inspect the earnings figures directly rather than treating a negative multiple as a cheap valuation.
Price relative to book equity
ARQQ's recorded price-to-book ratio is 11.01. That compares its market equity value with recorded book equity. Examine its business and balance sheet to understand why those values differ.
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