Arqit Quantum - (ARQQ) closed at $15.31 on October 20, 2026, up 9.2% from the previous close, on volume of 213,918 shares (30-day average 357,782).
Data as of October 20, 2026.
20-Oct-2026
Globe Newswire (Tue, 20-Oct 9:00 AM ET)
Aquestive, Guardant, AFLAC, Baozun, Arqit: Insider Shake-Up
TipRanks (Sat, 17-Oct 9:00 AM ET)
Globe Newswire (Thu, 8-Oct 8:30 AM ET)
Globe Newswire (Tue, 22-Sep 9:00 AM ET)
The Quantum Deadline Moved Up. Most Firms Cannot Find Their Own Keys.
Globe Newswire (Thu, 10-Sep 10:28 AM ET)
Arqit, Es'hailSat and AIEE Demonstrate Quantum-Safe Satellite Security
Globe Newswire (Tue, 1-Sep 9:17 AM ET)
Globe Newswire (Fri, 28-Aug 12:45 PM ET)
A $19 Billion Trust Layer Is Being Rebuilt for the Quantum Age. QSE Just Got a Seat at the Table
Globe Newswire (Tue, 4-Aug 9:00 AM ET)
Arqit Quantum Stands Out as Post-Quantum Encryption Moves Center Stage Amid $2B Federal Quantum Push
Market Chameleon (Mon, 6-Jul 5:41 AM ET)
ARQQ’s Quantum-Safe Encryption Expansion Highlights the Urgency for Post-Quantum Security Solutions
Market Chameleon (Wed, 17-Jun 6:36 AM ET)
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.
Arqit Quantum - trades on the NASDAQ stock market under the symbol ARQQ.
As of October 20, 2026, ARQQ stock price climbed to $15.31 with 213,918 million shares trading.
ARQQ has a beta of 4.63, meaning it tends to be more sensitive to market movements. ARQQ has a correlation of 0.23 to the broad based SPY ETF.
ARQQ has a market cap of $266.43 million. This is considered a Small Cap stock.
In the last 3 years, ARQQ traded as high as $62.00 and as low as $3.72.
The top ETF exchange traded funds that ARQQ belongs to (by Net Assets): QTUM, BUG, CQTM, SPDW, QQQS.
ARQQ has underperformed the market in the last year with a price return of -63.1% while the SPY ETF gained +16.9%. ARQQ has also underperformed the stock market ETF in the last 3 month and 2 week periods returning -12.1% and -35.3%, respectively, while the SPY returned +3.7% and -0.7%, respectively.
ARQQ support price is $13.13 and resistance is $14.91 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that ARQQ shares will trade within this expected range on the day.
