Arqit Quantum Inc. (ARQQ) P/E Ratio History
Deep ValueTrading at -9.5x · 0th percentile of 5-year range · Significant discount to historical valuation · Data 2023–2023
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P/E Ratio Analysis
As of June 21, 2026, Arqit Quantum Inc. (ARQQ) trades at a price-to-earnings ratio of -9.5x, with a stock price of $24.38 and trailing twelve-month earnings per share of $-4.54.
The current P/E is 169% below its 5-year average of 13.8x. Over the past five years, ARQQ's P/E has ranged from a low of 13.8x to a high of 13.8x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Technology sector median P/E of 29.0x, ARQQ trades at a 133% discount to its sector peers. The sector includes 352 companies with P/E ratios ranging from 0.0x to 187.7x.
Relative to the broader market, ARQQ trades at a notable discount to the S&P 500 median P/E of 24.4x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our ARQQ DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
ARQQ Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
ARQQ P/E vs Peers
Cybersecurity and identity management peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $4B | 13.3 | 0.80 | +7% | |
| $10B | 20.9 | 1.73 | +20% | |
| $13B | 9.6Lowest | 0.47Best | +21% | |
| $234B | 22.3 | 1.80 | +74%Best |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
ARQQ Historical P/E Data (2023–2023)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2023 Q4 | Sep 30 2023 | $14.88 | $1.08 | 13.8x | +0% |
Average P/E for displayed period: 13.8x
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
3+ years return with dividends reinvested.
DCA Calculator
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Peer Comparison
Compare growth, multiples, and margins vs sector.
ARQQ — Frequently Asked Questions
Quick answers to the most common questions about buying ARQQ stock.
What is ARQQ's P/E ratio?
Arqit Quantum Inc. (ARQQ) trailing twelve-month P/E ratio is -9.5x, based on TTM diluted EPS of $-4.54. The 5-year average P/E is 13.8x and the historical range spans 13.8x to 13.8x.
Is ARQQ stock overvalued or undervalued?
ARQQ trades at -9.5x P/E, below its 5-year average of 13.8x. At the 0th percentile of its historical range (13.8x–13.8x), the stock is priced at a discount to its own history.
Is ARQQ stock expensive?
No, ARQQ is not expensive on a historical basis. The current P/E of -9.5x is below the 5-year average of 13.8x and sits at the 0th percentile of its valuation range.
What is ARQQ's historical P/E range?
Over the past 5 years, ARQQ's P/E ratio has ranged from 13.8x to 13.8x, with a median of 13.8x and an average of 13.8x. The current P/E of -9.5x places the stock at the 0th percentile of this range. Full historical data spans 2023–2023.
How does ARQQ's P/E compare to the S&P 500?
ARQQ trades at -9.5x P/E versus the S&P 500 median of 24.4x. The 139% discount to the market suggests lower growth expectations or perceived higher risk.
How does ARQQ's valuation compare to Technology peers?
Arqit Quantum Inc. P/E of -9.5x compares to the Technology sector median of 29.0x. The discount suggests lower growth expectations, weaker margins, or higher perceived risk relative to peers. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is ARQQ's PEG ratio?
ARQQ PEG ratio is N/A, based on a P/E of -9.5x and EPS growth of 76.3%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is ARQQ's earnings yield?
ARQQ earnings yield is N/A, the inverse of its -9.5x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.