<img src="https://ml.globenewswire.com/Resource/Download/a4b9c476-be7d-46a7-96ba-4e8c38c4b83f?size=2" nborder="0" align="left" hspace="5" vspace="5" title="222.png" alt="Arqit"/>LONDON, May 11, 2026 <a href="https://www.globenewswire.com" target="_blank">(GLOBE NEWSWIRE)</a> -- <a href="https://www.globenewswire.com/Tracker?data=yRRF838euhopU8idfd6N_Ag0o7K5fP0h3dlfQpeGTtGeGl_Sa66bcHZ6de2vW4kAWRUn-NezhQ-JCWJGbb_6ZA==" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=yRRF838euhopU8idfd6N_Ag0o7K5fP0h3dlfQpeGTtGeGl_Sa66bcHZ6de2vW4kAWRUn-NezhQ-JCWJGbb_6ZA==" title="Arqit Quantum Inc.">Arqit Quantum Inc.</a> (“Arqit”), a leader in quantum safe encryption, announces it will report financial results for the six months ending March 31, 2026 on Thursday, May 21, 2026.Arqit will host a conference call at 11:00 a.m. ET / 8:00 a.m. PT on May 21, 2026 with the Company’s CEO, Andy Leaver, and CFO, Nick Pointon. A live webcast of the call will be available on the “News &amp; Events” page of the Company’s website at <a href="https://www.globenewswire.com/Tracker?data=PIDR-q_vehTvlkt0qW62GX28Cb6YKIjM6t1O2m63xBC-8uDRHHEV4Q3uT71klSy3-2m6buyLFtDA8sNlJUq6mYRVsN4mEJ4tp7i5S7NdVws=" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=PIDR-q_vehTvlkt0qW62GX28Cb6YKIjM6t1O2m63xBC-8uDRHHEV4Q3uT71klSy3-2m6buyLFtDA8sNlJUq6mYRVsN4mEJ4tp7i5S7NdVws=" title="ir.arqit.uk">ir.arqit.uk</a>. To access the call by phone, please go to this link (<a href="https://www.globenewswire.com/Tracker?data=PSepB3opCMCJfh1dAkFeV3oQmDS_UOtXMXf6AcjP394_EPPo91G5d4UogiGHCFSvXssAZ_YmPnJfpH3C3P6_eLhePRUBe3pyPAP-4JI62ODAmcS1VHqdCfpcNi9CjZCLC_l9rfDnCYgJuuotUszAbI7Uoah8UeXzw1Covsw_VtB5cvfnkzxfmP3lnSoBArdvSLr3z8a2xMZPt3cGDjiJtA==" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=PSepB3opCMCJfh1dAkFeV3oQmDS_UOtXMXf6AcjP394_EPPo91G5d4UogiGHCFSvXssAZ_YmPnJfpH3C3P6_eLhePRUBe3pyPAP-4JI62ODAmcS1VHqdCfpcNi9CjZCLC_l9rfDnCYgJuuotUszAbI7Uoah8UeXzw1Covsw_VtB5cvfnkzxfmP3lnSoBArdvSLr3z8a2xMZPt3cGDjiJtA==" title="registration link">registration link</a>) and you will be provided with dial in details. To avoid delays, we encourage participants to dial into the conference call fifteen minutes ahead of the scheduled start time. A replay of the webcast will also be available for a limited time at <a href="https://www.globenewswire.com/Tracker?data=PAiDsvUqOimVL0X7vOrB0NU_sdaB-hH-f2Vynexxo8IQZbbXsPDZNBO-Zx0vPVa4ADUI4lsW-dlaaDJTgZUhSg==" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=PAiDsvUqOimVL0X7vOrB0NU_sdaB-hH-f2Vynexxo8IQZbbXsPDZNBO-Zx0vPVa4ADUI4lsW-dlaaDJTgZUhSg==" title="ir.arqit.uk">ir.arqit.uk</a>.About Arqit&nbsp;Arqit Quantum Inc. (Nasdaq: ARQQ, ARQQW) secures the world’s most critical data with quantum-safe encryption software. Simple, scalable, and compliant, its products integrate with existing infrastructure, requiring no hardware changes. Arqit provides a complete “Detect, Protect, Comply” solution for governments and enterprises that protects data, ensures compliance, and safeguards their transition to the post-quantum era.Arqit’s primary product offerings are Encryption Intelligence and NetworkSecure™. Encryption Intelligence detects cryptographic exposure, identifies vulnerabilities, and maps dependencies. NetworkSecure™ protects data in transit with provably secure post-quantum cryptography and contributes to establishment of confidential compute environments for complete data sovereignty.Arqit is an IDC Innovator for Post-Quantum Cryptography (2024) and a multi-award-winner in quantum-safe security. For more information, visit&nbsp;<a href="https://www.globenewswire.com/Tracker?data=Hkja25hsIyNj7PtMmhXDWeX-BZSm04QNseQrfSGres3IpIFtV2UHJcH9Kwe6kM3Q3YNINkHiUEKVfOJIEuKRWG_DsxzEewVVsbYNyN5QVxU=" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=Hkja25hsIyNj7PtMmhXDWeX-BZSm04QNseQrfSGres3IpIFtV2UHJcH9Kwe6kM3Q3YNINkHiUEKVfOJIEuKRWG_DsxzEewVVsbYNyN5QVxU=" title="www.arqitgroup.com">www.arqitgroup.com</a>Media relations enquiries:Arqit:&nbsp;<a href="https://www.globenewswire.com/Tracker?data=1UEa1UnkUTx4KFYYw-SbFowQ9q1W05gWDe8gwdfIogGGsGo5IVyG-bpFsOUUfpNTGRrP4ImigpwFoDWwJl0nZA==" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=1UEa1UnkUTx4KFYYw-SbFowQ9q1W05gWDe8gwdfIogGGsGo5IVyG-bpFsOUUfpNTGRrP4ImigpwFoDWwJl0nZA==" title="pr@arqit.uk">pr@arqit.uk</a>Investor relations enquiries:Arqit:&nbsp;<a href="https://www.globenewswire.com/Tracker?data=fPQ6_tnMv-lD1BM-nt-KGyJJShpVLDaSlcfB03bXG97LPjvh7H9PUM1XeYGLjZy4DIN_QE1An8-liF-z6kAN_FUc6wfDN2Ls-PYUBZhppYjdlWvH8Y35YStPojxUYNbW" rel="nofollow" target="_blank" data-mce-href="https://www.globenewswire.com/Tracker?data=fPQ6_tnMv-lD1BM-nt-KGyJJShpVLDaSlcfB03bXG97LPjvh7H9PUM1XeYGLjZy4DIN_QE1An8-liF-z6kAN_FUc6wfDN2Ls-PYUBZhppYjdlWvH8Y35YStPojxUYNbW" title="investorrelations@arqit.uk">investorrelations@arqit.uk</a> <img alt="" src="https://ml.globenewswire.com/media/MjM5MWNjOGQtZTA1YS00ZDBhLWExYzQtZTE5MGUzYTgyYTE4LTEyNDQxNjEtMjAyNi0wNS0xMS1lbg==/tiny/Arqit-Quantum-Inc-.png" />

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Arqit Quantum Inc. Sets First Half 2026 Earnings Conference Call for Thursday, May 21, 2026 at 11:00 a.m. ET

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