Arqit Quantum (ARQQ) plans $7M settlement to resolve U.S. class actions

Rhea-AI Filing Summary

Arqit Quantum Inc. has agreed to settle a previously disclosed putative securities class action in the U.S. District Court for the Eastern District of New York for $7 million, under a settlement agreement executed on January 9, 2026 and submitted to the court for documentation and approval. The case, referred to as the Federal Action, involved the company and certain of its directors. Assuming the court approves the settlement, the company will seek dismissal of a related putative class action in the Supreme Court of the State of New York, which has been stayed because it falls entirely within the settlement classes of the Federal Action. The information in this report is also incorporated by reference into several of Arqit’s effective Form S-8 and Form F-3 registration statements.

Insights

Litigation and risk analyst

Arqit moves to resolve U.S. class actions with a $7M deal.

Arqit Quantum Inc. has executed a settlement agreement to resolve a previously disclosed putative class action in the U.S. District Court for the Eastern District of New York for $7 million, subject to court approval. This addresses litigation involving the company and certain directors that had been pending in federal court.

The company states that, once the federal settlement is approved, it will seek dismissal of a stayed, related putative class action in New York state court that falls entirely within the federal settlement classes. If approved by the court, this structure could consolidate resolution of both actions into a single settlement framework, replacing litigation uncertainty with a defined cash obligation.

The agreement has been submitted to the federal court for documentation and approval, so the key next step is the court’s consideration of the proposed $7 million settlement. Subsequent company filings may provide additional detail on timing and any related financial statement treatment after court approval.

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 January 2026

Commission File Number: 001-40777

ARQIT QUANTUM INC.

(Exact name of registrant as specified in its charter)

2nd 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 January 9, 2026, Arqit Quantum Inc. (the “Company”) and counsel for the plaintiffs in the previously disclosed putative class action lawsuit filed against the Company and certain of the Company’s directors in the United States District Court for the Eastern District of New York (the “Court”) (Case No. 1:22-cv-02604) (the “Federal Action”) executed a settlement agreement that will resolve the Federal Action for $7 million, which has been submitted to the Court for further documentation and approval.

Assuming Court approval of the settlement, the Company will seek dismissal of the previously disclosed putative class action lawsuit that was filed against the Company and certain of its directors in the Supreme Court of the State of New York (the “State Court”) (Index No. 153555/2023) (the “State Court Action”), which has been stayed per order of the State Court pending final adjudication of the Federal Action because the State Court Action falls entirely within the settlement classes of the Federal Action.

Other than as indicated below, the information in this Report of Foreign Private Issuer on Form 6-K (including the exhibits hereto) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act. The information furnished in this Report of Foreign Private Issuer on Form 6-K is hereby incorporated by reference into the Company’s registration statements on Form S-8 (File Nos. 333-262215, 333-275960 and 333-284706) and Form F-3 (File Nos. 333-268786, 333-259982, 333-284343 and 333-289939), and shall be a part thereof, to the extent not superseded by documents or reports subsequently filed or furnished.

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: January 12, 2026

FAQ

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

Arqit Quantum Inc. disclosed that it executed a settlement agreement on January 9, 2026 to resolve a previously disclosed putative class action in U.S. federal court for $7 million, subject to court approval, and outlined related steps for a parallel state court action.

How much is Arqit Quantum Inc. paying to settle the federal class action?

The settlement agreement provides that Arqit Quantum Inc. will resolve the federal putative class action in the Eastern District of New York for $7 million, with the agreement submitted to the court for documentation and approval.

What happens to the New York state court class action against Arqit Quantum Inc.?

Assuming the federal court approves the $7 million settlement, Arqit Quantum Inc. will seek dismissal of the related putative class action in the New York State Supreme Court, which has been stayed because it falls entirely within the settlement classes of the federal action.

Is the Arqit Quantum Inc. class action settlement final?

No. Arqit Quantum Inc. and plaintiffs’ counsel have executed a $7 million settlement agreement and submitted it to the federal court for further documentation and approval, so it remains subject to court approval.

Which registration statements does this Arqit Quantum 6-K update?

The information in this report is incorporated by reference into Arqit Quantum Inc.’s registration statements on Form S-8 (File Nos. 333-262215, 333-275960 and 333-284706) and Form F-3 (File Nos. 333-268786, 333-259982, 333-284343 and 333-289939).

Which courts are involved in the Arqit Quantum Inc. class actions?

The federal putative class action is in the U.S. District Court for the Eastern District of New York (Case No. 1:22-cv-02604), and the related state putative class action is in the Supreme Court of the State of New York (Index No. 153555/2023).