Arqit (NASDAQ: ARQQ) ends U.S. class actions with $7M settlement deal

Rhea-AI Filing Summary

Arqit Inc. reports that the U.S. District Court for the Eastern District of New York has approved a $7 million Settlement Agreement resolving a previously disclosed putative federal securities class action against the company and certain directors. After this approval, a separate, previously disclosed putative class action in New York state court was voluntarily dismissed by a different set of plaintiffs. As a result, all putative class actions filed against Arqit in U.S. federal and state courts have been resolved. The company also notes that this information is incorporated by reference into its existing registration statements on Forms S-8 and F-3.

Insights

Litigation and capital markets analyst

Arqit pays $7M to resolve U.S. class actions, removing a legal overhang.

Arqit has reached a court-approved $7 million settlement to end a putative federal securities class action, and a related state case has been voluntarily dismissed. This closes all known putative class actions in U.S. courts against the company and certain directors.

The settlement implies a cash outflow but also eliminates ongoing litigation uncertainty and potential additional legal expenses. The filing does not quantify Arqit’s overall financial position, so the materiality of the $7 million payment relative to its size cannot be assessed here.

Because this event both removes legal risk and requires a defined cash payment, its net impact is best viewed as neutral in isolation. Future company filings may detail how the settlement payment is funded and any related insurance recoveries or remaining legal matters.

Key Figures

Class action settlement amount: $7 million

1 metrics

Class action settlement amount $7 million Settlement Agreement resolving federal putative class action in Eastern District of New York

Key Terms

Settlement Agreement, putative class action, Report of Foreign Private Issuer, incorporated by reference, +2 more

6 terms

Settlement Agreement financial

"approved a settlement agreement (the “Settlement Agreement”) between Arqit Quantum Inc."

A settlement agreement is a legally binding deal where two sides resolve a dispute—often a lawsuit—by agreeing on terms such as payments, actions, or changes in behavior instead of continuing the case to trial. For investors it matters because settlements can create immediate costs, limit future liabilities or risks, and change a company's cash flow, reputation, or ongoing obligations much like paying a negotiated bill to avoid a lengthy, uncertain fight.

putative class action regulatory

"previously-disclosed putative class action lawsuit filed against the Company"

A putative class action is a lawsuit brought on behalf of a group of people who allege similar harm, filed before a court has formally approved that group as a legal 'class.' For investors it matters because, if the court later certifies the class, the company could face consolidated claims, larger damages and greater legal and reputational risk—like one small alarm that may turn into a building-wide evacuation if authorities confirm a shared problem.

Report of Foreign Private Issuer regulatory

"information in this Report of Foreign Private Issuer on Form 6-K"

A report of a foreign private issuer is a formal filing that a non‑U.S. company makes to U.S. regulators to share important business, financial, or governance information with American investors. Think of it as a regular update or press packet that keeps investors informed about events that could change a company’s value—like earnings, management changes, contracts, or regulatory developments—so investors can make timely, informed decisions.

incorporated by reference regulatory

"hereby incorporated by reference into the Company’s registration statements"

Form S-8 regulatory

"registration statements on Form S-8 (File Nos. 333-262215, 333-275960 and 333-284706)"

A Form S-8 is a U.S. Securities and Exchange Commission registration that lets a public company set aside shares for employee benefit plans and stock-based compensation. Think of it as opening a dedicated account that authorizes the company to issue or reserve stock for workers and directors; it matters to investors because it enables share dilution when those awards are granted or exercised and signals how management is compensated and incentivized.

Form F-3 regulatory

"registration statements on Form F-3 (File Nos. 333-268786, 333-259982, 333-289939 and 333-292677)"

Form F-3 is a U.S. securities filing that lets eligible foreign companies pre-register and then quickly sell shares or other securities to raise money, because they already meet ongoing reporting and size tests. For investors it signals that the company is up-to-date with regulatory disclosure and has an efficient way to issue new securities — similar to a pre-approved credit line — which can mean faster capital raises but also potential dilution of existing holdings.

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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 June 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 June 1, 2026, the Eastern District of New York (the “Federal Court”) approved a settlement agreement (the “Settlement Agreement”) between 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 its directors in the United States District Court for the Eastern District of New York (Case No. 1:22-cv-02604) (the “Federal Action”).  The Settlement Agreement resolves the Federal Action for $7 million.  Following the Federal Court’s approval of the Settlement Agreement, a different set of plaintiffs voluntarily dismissed their 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 (Index No. 153555/2023).  As a result, all of the putative class actions filed against the Company in federal and state courts in the U.S. have been resolved.

Other than as indicated below, the information in this Report of Foreign Private Issuer on Form 6-K (including any 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, 333-289939 and 333-292677), 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: June 17, 2026

FAQ

What class action lawsuits did Arqit Inc. (ARQQ) resolve in the U.S.?

Arqit resolved a putative federal securities class action in the Eastern District of New York through a court-approved settlement and a separate New York state putative class action that plaintiffs voluntarily dismissed, leaving no putative class actions pending in U.S. federal or state courts.

How much is Arqit Inc. (ARQQ) paying to settle the federal class action?

Arqit agreed to a Settlement Agreement resolving the federal putative class action for $7 million. This amount settles the case filed in the Eastern District of New York against the company and certain of its directors, as disclosed in the report.

Which court approved Arqit Inc.’s (ARQQ) class action settlement?

The United States District Court for the Eastern District of New York approved Arqit’s Settlement Agreement. This federal court approval formally resolves the previously disclosed putative class action identified as Case No. 1:22-cv-02604 in that court.

What happened to the New York state court class action against Arqit Inc. (ARQQ)?

A different set of plaintiffs voluntarily dismissed their previously disclosed putative class action in the Supreme Court of the State of New York. This dismissal followed the federal court’s approval of the Settlement Agreement and contributed to resolving all U.S. putative class actions.

How does this development affect Arqit Inc.’s (ARQQ) registration statements?

The information about the settlements is incorporated by reference into Arqit’s existing registration statements on Forms S-8 and F-3. This means these registration statements now formally include the disclosed settlement and litigation resolution details.

Does the filing say if the $7 million settlement changes Arqit Inc.’s outlook?

The filing specifies that the federal putative class action is resolved for $7 million and that all U.S. putative class actions are resolved. It does not discuss broader business outlook, focusing instead on legal resolution and related disclosure updates.