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Arqit Quantum Inc.

$20.05 -$4.49 (-18.30%)
NASDAQ · 11 Sep 2026 20:00 UTC
Previous Close
$20.58
Day Range
$20$20.95
Year Range
$11.52$62
Market Cap
348.92M
AVG Volume
682.89K
Trailing/Forward PE
-6.31/-
PEG ratio
0.21
Dividend Yield
-
Next Earnings Date
2026-12-16
Primary Exchange
NASDAQUS
Employee Count
05010015020212022202320242025
ARQQ Employee Count by quarter
PeriodEmployee Count
202591
202474
2023139
2022140
202174
PE Ratio
02505007501000med 2.91May 21Dec 23Jan 24Mar 24Apr 24May 24
ARQQ PE Ratio by quarter
PeriodPE Ratio
May 242.19
May 242.39
May 242.19
May 242.25
Apr 242.67
Apr 242.59
Apr 242.72
Apr 243.12
Mar 243.98
Mar 244.03
Mar 244.25
Mar 244.66
Mar 244.01
Feb 243.01
Feb 243.23
Feb 242.91
Feb 242.36
Jan 242.46
Jan 242.58
Jan 242.57
Jan 242.2
Dec 232.6
Dec 232.58
Dec 232.81
Dec 232.73
Dec 232.81
Nov 232.91
May 21887.15
May 21887.15
May 21886.25
May 21874.55
Apr 21879.05
Apr 21875.45
Apr 21903.34
Apr 21895.24
Apr 21863.75
Free Cash Flow Yield
-250%-200%-150%-100%-50%0%med -32.84%Dec 24Apr 25Jul 25Oct 25Feb 26May 26Sep 26
ARQQ Free Cash Flow Yield by quarter
PeriodFree Cash Flow Yield
Sep 26-20.76%
Sep 26-19.47%
Aug 26-20.77%
Aug 26-19.69%
Aug 26-17.08%
Aug 26-18.17%
Jul 26-24.29%
Jul 26-24.99%
Jul 26-23.89%
Jul 26-21.81%
Jul 26-17.69%
Jun 26-17.15%
Jun 26-17.07%
Jun 26-30.6%
Jun 26-34.28%
May 26-25.21%
May 26-23.79%
May 26-32.54%
May 26-29.01%
May 26-29.89%
Apr 26-29.87%
Apr 26-27.08%
Apr 26-34.64%
Apr 26-31.07%
Mar 26-36.85%
Mar 26-31.92%
Mar 26-31.85%
Mar 26-28.17%
Feb 26-26.37%
Feb 26-27.38%
Feb 26-25.53%
Feb 26-23.35%
Jan 26-21.36%
Jan 26-17.94%
Jan 26-16.32%
Jan 26-16.15%
Jan 26-17.69%
Dec 25-19.03%
Dec 25-17.03%
Dec 25-15.31%
Dec 25-47.83%
Nov 25-51.06%
Nov 25-59.73%
Nov 25-52.97%
Nov 25-43.01%
Oct 25-33.36%
Oct 25-34.08%
Oct 25-35.08%
Oct 25-30%
Oct 25-29.16%
Sep 25-39.93%
Sep 25-34.88%
Sep 25-43.18%
Sep 25-52.27%
Aug 25-48.52%
Aug 25-47.24%
Aug 25-44.18%
Aug 25-45.02%
Aug 25-45%
Jul 25-37.98%
Jul 25-34.36%
Jul 25-41.97%
Jul 25-41.49%
Jun 25-37.43%
Jun 25-34.92%
Jun 25-61.21%
Jun 25-56.97%
May 25-67.51%
May 25-24.39%
May 25-33.14%
May 25-38.67%
May 25-36.24%
Apr 25-40.43%
Apr 25-40.97%
Apr 25-40.83%
Apr 25-50.95%
Mar 25-40.67%
Mar 25-34.54%
Mar 25-40.83%
Mar 25-48.57%
Feb 25-48.19%
Feb 25-38.28%
Feb 25-37.05%
Feb 25-32.24%
Jan 25-29.88%
Jan 25-21.96%
Jan 25-22.88%
Jan 25-27.94%
Jan 25-15.44%
Dec 24-14.35%
Dec 24-20.08%
Dec 24-25.84%
Dec 24-26.82%
Nov 24-54.74%
Nov 24-84.66%
Nov 24-138.1%
Nov 24-133.55%
Nov 24-201.43%
Oct 24-152.76%
Oct 24-184.14%
Price to Sales
-2000200400600med 218.71Dec 24Apr 25Jul 25Oct 25Feb 26May 26Sep 26
ARQQ Price to Sales by quarter
PeriodPrice to Sales
Sep 26250.52
Sep 26267.02
Aug 26250.4
Aug 26264.14
Aug 26304.38
Aug 26286.14
Jul 26214.04
Jul 26208.04
Jul 26217.66
Jul 26238.4
Jul 26293.88
Jun 26303.13
Jun 26304.63
Jun 26169.93
Jun 26151.69
May 26206.29
May 26218.54
May 26247.86
May 26277.96
May 26269.79
Apr 26269.97
Apr 26297.85
Apr 26232.81
Apr 26259.57
Mar 26218.88
Mar 26252.7
Mar 26253.25
Mar 26286.33
Feb 26305.84
Feb 26294.5
Feb 26315.87
Feb 26345.41
Jan 26377.56
Jan 26449.65
Jan 26494.24
Jan 26499.26
Jan 26455.97
Dec 25423.82
Dec 25473.62
Dec 25526.76
Dec 25156.96
Nov 25147.05
Nov 25125.7
Nov 25141.74
Nov 25174.55
Oct 25225.04
Oct 25220.3
Oct 25214.01
Oct 25250.27
Oct 25257.49
Sep 25188.01
Sep 25215.24
Sep 25173.88
Sep 25143.65
Aug 25154.74
Aug 25158.92
Aug 25169.96
Aug 25166.76
Aug 25166.86
Jul 25197.71
Jul 25218.49
Jul 25178.88
Jul 25180.94
Jun 25200.59
Jun 25214.99
Jun 25122.66
Jun 25131.79
May 25111.21
May 25310.71
May 25228.67
May 25196.01
May 25209.12
Apr 25187.47
Apr 25184.99
Apr 25185.61
Apr 25148.74
Mar 25186.35
Mar 25219.39
Mar 25185.61
Mar 25156.04
Feb 25157.27
Feb 25197.98
Feb 25204.54
Feb 25235.11
Jan 25253.67
Jan 25345.11
Jan 25331.25
Jan 25271.24
Jan 25490.76
Dec 24528.25
Dec 24377.41
Dec 24293.27
Dec 24282.62
Nov 24-45.47
Nov 24-29.4
Nov 24-18.02
Nov 24-18.64
Nov 24-12.36
Oct 24-16.29
Oct 24-13.52
EV/EBITDA
16601680170017201740med 1705.21Apr 21Apr 21Apr 21May 21May 21
ARQQ EV/EBITDA by quarter
PeriodEV/EBITDA
May 211706.93
May 211706.93
May 211705.21
May 211682.75
Apr 211691.39
Apr 211684.48
Apr 211738.02
Apr 211722.48
Apr 211662.03
Price/Operating Cashflow
185187.5190192.5195197.5med 191.52Apr 21Apr 21Apr 21May 21May 21
ARQQ Price/Operating Cashflow by quarter
PeriodPrice/Operating Cashflow
May 21191.71
May 21191.71
May 21191.52
May 21188.99
Apr 21189.96
Apr 21189.18
Apr 21195.21
Apr 21193.46
Apr 21186.66
Price to Book
01020304050med 11.66Dec 24Apr 25Jul 25Oct 25Feb 26May 26Sep 26
ARQQ Price to Book by quarter
PeriodPrice to Book
Sep 2611.66
Sep 2612.43
Aug 2611.66
Aug 2612.3
Aug 2614.17
Aug 2613.32
Jul 269.96
Jul 269.69
Jul 2610.13
Jul 2611.1
Jul 2613.68
Jun 2614.11
Jun 2614.18
Jun 267.91
Jun 267.06
May 269.6
May 2610.17
May 267.49
May 268.4
May 268.15
Apr 268.16
Apr 269
Apr 267.04
Apr 267.84
Mar 266.61
Mar 267.64
Mar 267.65
Mar 268.65
Feb 269.24
Feb 268.9
Feb 269.54
Feb 2610.44
Jan 2611.41
Jan 2613.59
Jan 2614.93
Jan 2615.09
Jan 2613.78
Dec 2512.81
Dec 2514.31
Dec 2515.92
Dec 259.64
Nov 259.03
Nov 257.72
Nov 258.7
Nov 2510.72
Oct 2513.82
Oct 2513.53
Oct 2513.14
Oct 2515.37
Oct 2515.81
Sep 2511.54
Sep 2513.22
Sep 2510.68
Sep 258.82
Aug 259.5
Aug 259.76
Aug 2510.43
Aug 2510.24
Aug 2510.24
Jul 2512.14
Jul 2513.41
Jul 2510.98
Jul 2511.11
Jun 2512.32
Jun 2513.2
Jun 257.53
Jun 258.09
May 256.83
May 2524.53
May 2518.05
May 2515.47
May 2516.51
Apr 2514.8
Apr 2514.6
Apr 2514.65
Apr 2511.74
Mar 2514.71
Mar 2517.32
Mar 2514.65
Mar 2512.32
Feb 2512.42
Feb 2515.63
Feb 2516.15
Feb 2518.56
Jan 2520.03
Jan 2527.25
Jan 2526.15
Jan 2521.41
Jan 2538.74
Dec 2441.7
Dec 2429.8
Dec 2423.15
Dec 2422.31
Nov 248.46
Nov 245.47
Nov 243.35
Nov 243.47
Nov 242.3
Oct 243.03
Oct 242.51
Arqit Quantum Inc.
ARQQ
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News: ARQQ

Arqit, Es'hailSat and AIEE Demonstrate Quantum-Safe Satellite Security

globenewswire.com · 1 Sep 2026

Arqit, Es'hailSat and AIEE Demonstrate Quantum-Safe Satellite Security

LONDON and DOHA, Sept. 01, 2026 (GLOBE NEWSWIRE) -- Arqit Quantum Inc. (NASDAQ: ARQQ, ARQQW), a global leader in quantum-safe encryption, Es'hailSat - the Qatar Satellite Company - a world-class satellite operator and service provider with coverage spanning the MENA region - and Advanced International Electronic Equipment Company (AIEE), a specialist systems integrator for secure communications infrastructure, today announced the successful demonstration of quantum-safe security across operational satellite communications infrastructure.

Quantum Computing Is Raising the Stakes for Cybersecurity: 5 Stocks to Watch

marketbeat.com · 26 Aug 2026

Quantum Computing Is Raising the Stakes for Cybersecurity: 5 Stocks to Watch

In the near future, the mathematical horizon where quantum computing could break all traditional encryption is transitioning from a theoretical debate into a real corporate compliance deadline. Quantum advances are narrowing some estimates of the resources required to threaten current cryptographic systems, potentially bringing that risk closer than many sectors and market participants expected.

nLighten and Arqit prove you can use the public cloud without giving up sovereignty

globenewswire.com · 14 Jul 2026

nLighten and Arqit prove you can use the public cloud without giving up sovereignty

LONDON and AMSTERDAM, July 14, 2026 (GLOBE NEWSWIRE) -- nLighten, a European edge data centre platform, and Arqit Quantum Inc. (NASDAQ: ARQQ, ARQQW) a global leader in PQC migration and quantum-safe encryption, today announced the successful completion of a joint proof of concept (POC), demonstrating how organisations can use public cloud services while maintaining control over sensitive data and cryptographic assets. For customers, the benefit is simple: they no longer have to choose between innovation and control.

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