Arqit Quantum (NASDAQ: ARQQ) furnishes select preliminary FY 2025 results

Rhea-AI Filing Summary

Arqit Quantum Inc. has furnished a Form 6-K to provide investors with a press release containing select unaudited preliminary financial results for the six months and full fiscal year ended September 30, 2025. The company explains that this press release, dated October 9, 2025 and attached as Exhibit 99.1, presents preliminary figures for the second half and full year of fiscal 2025. Arqit also clarifies that the information in this Form 6-K, including the exhibit, is being furnished rather than filed and is not automatically incorporated into other securities law filings unless specifically referenced.

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 October 2025

Commission File Number: 001-40777

ARQIT QUANTUM INC.

(Exact name of registrant as specified in its charter)

1^st 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 October 9, 2025 Arqit Quantum Inc. (the “Company”) issued a press release entitled “Announces Select Preliminary Financial Results for the Second Half and Full Fiscal Year 2025,” in which the Company reported select unaudited preliminary financial results for the six months and year ended September 30, 2025. A copy of that press release is furnished as Exhibit 99.1 hereto.

The information furnished in this Report of Foreign Private Issuer on Form 6-K, including the information contained in Exhibit 99.1, shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by a specific reference in such filing.

EXHIBIT INDEX

Exhibit No.		Description
99.1		Press release of Arqit Quantum Inc., dated October 9, 2025.

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: October 9, 2025

FAQ

What did Arqit Quantum Inc. (ARQQ) submit in this Form 6-K?

Arqit Quantum Inc. submitted a Form 6-K to furnish a press release that provides select unaudited preliminary financial results for the six months and full fiscal year ended September 30, 2025.

What period do Arqit Quantum Inc.'s preliminary results cover in this 6-K?

The preliminary results described relate to the second half of fiscal 2025 and the full fiscal year ended September 30, 2025.

How is the press release with Arqit Quantum Inc.'s preliminary results referenced in the Form 6-K?

The press release is referenced as Exhibit 99.1 to the Form 6-K and is described as a press release dated October 9, 2025 titled “Announces Select Preliminary Financial Results for the Second Half and Full Fiscal Year 2025.”

Is the information in Arqit Quantum Inc.'s Form 6-K considered filed with the SEC?

The company states that the information in this Form 6-K, including Exhibit 99.1, is furnished and not deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934.

Will Arqit Quantum Inc.'s preliminary results automatically be incorporated into other SEC filings?

No. The company explains that the information in this Form 6-K will not be incorporated by reference into any Securities Act or Exchange Act filing unless a future filing specifically incorporates it by reference.

Who signed Arqit Quantum Inc.'s Form 6-K for these preliminary results?

The Form 6-K was signed on behalf of Arqit Quantum Inc. by Andrew Leaver, the company’s Chief Executive Officer, dated October 9, 2025.