[6-K] Arqit Quantum Inc. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Arqit Quantum Inc. reports leadership changes, including the resignation of director Nicola Barbiero from the Board and all its committees, effective March 2, 2026. The company states his departure is to pursue other commitments and is not due to any disagreement with the company or the Board.

Chief Financial Officer Nick Pointon has also advised that he intends to resign in May. Arqit has identified Rob Russell as his successor, who has already begun working part-time to ensure a transition period before formally assuming the CFO role in May. The company expresses its appreciation for the service of both Mr. Barbiero and Mr. Pointon.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of March 2026

Commission File Number: 001-40777

ARQIT QUANTUM INC.

(Exact name of registrant as specified in its charter)

2^nd Floor, 3 Orchard Place

London, SW1H 0BF United Kingdom

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F ¨

EXPLANATORY NOTE

On March 2, 2026, Nicola Barbiero resigned from the Board of Directors (the “Board”) of Arqit Quantum Inc. (the “Company”) and all committees thereof. Mr. Barbiero intends to pursue other commitments and his resignation from the Board is not the result of any disagreement with the Company or the Board.

Nick Pointon has advised the Company that he intends to resign from the position of Chief Financial Officer in May. The Company has identified a successor, Rob Russell, who has begun working with the Company on a part-time basis for a transition period until he assumes the position of Chief Financial Officer in May. Rob began his career in the finance department at UBS Investment Bank, where he qualified as a Chartered Management Accountant. Throughout his career, he has held a variety of senior finance roles across private equity and venture capital–backed scale-up environments. Most recently, Rob served as CFOO of Virtualstock, a Notion Capital–backed UK enterprise SaaS provider offering dropship and marketplace range-extension solutions to major retailers in the UK and internationally. In September 2025, he played a pivotal role in securing Virtualstock’s successful exit to Logicbroker, a U.S. private-equity-backed competitor.

The Company thanks Mr. Barbiero and Mr. Pointon for their service.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ARQIT QUANTUM INC.
	By:	/s/ Andrew Leaver
	Name:	Andrew Leaver
	Title:	Chief Executive Officer

Date: March 4, 2026

FAQ

What leadership changes did Arqit Inc. (ARQQ) announce in this 6-K?

Arqit announced the resignation of director Nicola Barbiero and the upcoming resignation of Chief Financial Officer Nick Pointon in May, while naming Rob Russell as the incoming CFO, with a transition period already underway.

Why did Arqit director Nicola Barbiero resign from the Board?

Nicola Barbiero resigned from Arqit’s Board of Directors to pursue other commitments. The company explicitly states that his resignation is not the result of any disagreement with Arqit Quantum Inc. or its Board of Directors.

When will Arqit’s Chief Financial Officer Nick Pointon leave his role?

Chief Financial Officer Nick Pointon has advised Arqit that he intends to resign from his position in May. Until then, he remains in his role while his successor, Rob Russell, participates in a structured transition period.

Who is Rob Russell, the incoming CFO of Arqit Inc. (ARQQ)?

Rob Russell is Arqit’s incoming Chief Financial Officer, currently working part-time during the transition. He previously held senior finance roles, most recently serving as CFOO of Virtualstock, a UK enterprise SaaS provider backed by Notion Capital.

What relevant experience does Arqit’s new CFO Rob Russell bring?

Rob Russell began his career at UBS Investment Bank and qualified as a Chartered Management Accountant. He has held senior finance roles in private equity and venture-backed scale-ups and helped lead Virtualstock’s exit to Logicbroker in September 2025.

Did Arqit Inc. indicate any disagreement related to these resignations?

Arqit states that director Nicola Barbiero’s resignation is not due to any disagreement with the company or its Board. The filing gives no indication of disputes regarding Chief Financial Officer Nick Pointon’s planned departure in May.