Amber International appoints Prouden as new auditor

Amber International Holding Limited appointed Prouden HK Limited as its independent registered public accounting firm, effective July 28, 2026, and dismissed WWC, P.C. as auditor the same day.

Rhea-AI Filing Summary

Amber International Holding Limited appointed Prouden HK Limited as its independent registered public accounting firm, effective July 28, 2026, and dismissed WWC, P.C. as auditor the same day. The change was approved by the company’s audit committee.

WWC’s audit reports on Amber International’s consolidated financial statements for the fiscal years ended December 31, 2025 and 2024 contained no adverse opinions or qualifications. However, WWC issued an adverse opinion on the effectiveness of internal control over financial reporting as of December 31, 2025 due to material weaknesses previously described in the company’s Form 20-F. Amber International states there were no disagreements or additional reportable events with WWC beyond those material weaknesses, and that it did not consult Prouden on accounting matters before the appointment. WWC provided a letter to the SEC stating it does not disagree with the company’s statements about WWC.

Positive

• None.

Negative

• Adverse internal control opinion: WWC reported an adverse opinion on the effectiveness of internal control over financial reporting as of December 31, 2025 due to material weaknesses described in the company’s Form 20-F.

Filing Explained

This Form 6-K is an interim report by a foreign private issuer and, with Exhibit 99.1, the company intends to use it to satisfy its auditor-change reporting obligations under Item 16F of its Form 20-F for the year ending December 31, 2026, where permitted.

Key Figures

Auditor change effective date: July 28, 2026 Fiscal year-end with adverse ICFR opinion: December 31, 2025 Fiscal years audited without modified opinions: 2025 and 2024 +1 more

4 metrics

Auditor change effective date July 28, 2026 Date Prouden HK Limited was appointed and WWC, P.C. was dismissed as auditor

Fiscal year-end with adverse ICFR opinion December 31, 2025 As of this date WWC issued an adverse opinion on internal control over financial reporting

Fiscal years audited without modified opinions 2025 and 2024 WWC’s audit reports on consolidated financial statements for these years had no adverse or qualified opinions

PCAOB firm ID 1171 PCAOB identification number for WWC, P.C. as stated in its letter to the SEC

Key Terms

independent registered public accounting firm, material weaknesses, internal control over financial reporting, reportable events, +1 more

5 terms

independent registered public accounting firm regulatory

"appointed Prouden HK Limited as its independent registered public accounting firm"

An independent registered public accounting firm is an outside accounting company officially registered with the government regulator to examine and report on a public company's financial records and controls. Investors treat its reports like an impartial inspector’s certificate — they add credibility to financial statements, help spot errors or misleading claims, and reduce the risk that shareholders are relying on unchecked or biased numbers.

material weaknesses financial

"as a result of the existence of material weaknesses described in Item 15"

Material weaknesses are significant flaws in a company’s systems for ensuring its financial reports are accurate and reliable. Like a broken lock on a safe, they increase the chance that financial statements contain big errors or omissions, which can mislead investors about performance and risk; discovering one often raises questions about management oversight, may lead to restated results, and can affect investor confidence and a company’s valuation.

internal control over financial reporting financial

"report of WWC on the effectiveness of internal control over financial reporting"

Internal control over financial reporting is a company’s system of procedures and checks designed to make sure its financial statements are accurate and complete, like a set of guardrails and verification steps that catch mistakes or fraud before numbers are published. Investors care because strong controls make reported results more trustworthy, lower the risk of surprise restatements or regulatory problems, and give greater confidence when valuing the company or comparing it to peers.

reportable events regulatory

"no reportable events (as defined in Item 16F(a)(1)(v) of Form 20-F)"

Reportable events are significant incidents or changes a company is legally required to disclose to regulators and the public, such as major safety problems, legal actions, financial irregularities, or management changes. They matter to investors because these events can alter a company’s risk profile or future performance, much like a dashboard warning light signals a problem that could affect a car’s safety or reliability. Timely disclosure helps investors make informed decisions and maintain market fairness.

Form 20-F regulatory

"Item 15 of the Company’s annual report on Form 20-F"

Form 20-F is the standardized annual disclosure that non-U.S. companies must file with the U.S. securities regulator when their shares are traded in the U.S.; it contains audited financial statements, a plain-language description of the business, management discussion, governance details and key risk factors. It matters to investors because it provides a consistent, comparable company “report card” and rulebook, helping buyers assess financial health, governance and risks before investing.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What auditor change did Amber International (AMBR) announce?

Amber International Holding Limited appointed Prouden HK Limited as its independent registered public accounting firm, effective July 28, 2026, and dismissed WWC, P.C. as its previous auditor on the same date, with audit committee approval.

Did WWC issue qualified opinions on Amber International (AMBR) financial statements?

WWC’s audit reports on Amber International’s consolidated financial statements for the years ended December 31, 2025 and 2024 contained no adverse opinion, disclaimer, or qualification regarding uncertainty, audit scope, or accounting principles.

What internal control issues has Amber International (AMBR) disclosed?

WWC issued an adverse opinion on the effectiveness of Amber International’s internal control over financial reporting as of December 31, 2025, citing material weaknesses previously described in Item 15 of the company’s Form 20-F.

Were there disagreements between Amber International (AMBR) and WWC?

Amber International states there were no disagreements with WWC on accounting principles, financial statement disclosure, or audit scope and procedure, and no reportable events other than the already disclosed internal control material weaknesses.

Did Amber International (AMBR) consult Prouden before appointing it auditor?

The company reports that neither it nor anyone acting on its behalf consulted Prouden on accounting principles, audit opinions, or matters involving disagreements or reportable events during the periods before Prouden’s appointment as auditor.

How did WWC respond to Amber International (AMBR)’s description of the auditor change?

In a letter dated July 28, 2026, WWC stated that it does not disagree with Amber International’s statements about WWC and has no basis to agree or disagree with other statements in the company’s disclosure.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/28/2026 - 07:26 AM Accepted by SEC EDGAR 07/28/2026 - 07:25 AM Learn about SEC filing dates

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 July 2026

Commission File Number: 001-38313

Amber International Holding Limited

(Registrant’s name)

1 Wallich Street, #30-02 Guoco Tower, Singapore 078881

Tel: +65 60220228

(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 ¨

Change of Auditor

Amber International Holding Limited (Nasdaq: AMBR) (“Amber International” or the “Company”) today announced that it has appointed Prouden HK Limited (“Prouden”) as its independent registered public accounting firm, effective July 28, 2026. Prouden replaces WWC, P.C. (“WWC”), the former independent registered public accounting firm of the Company, which the Company dismissed on the same date. The change of the Company’s independent auditor has been approved by the audit committee of the board of directors of the Company.

The audit report of WWC on the Company’s consolidated financial statements for the fiscal years ended December 31, 2025 and 2024 contained no adverse opinion or disclaimer of opinion and was not qualified or modified as to uncertainty, audit scope or accounting principles. The report of WWC on the effectiveness of internal control over financial reporting as of December 31, 2025 expressed an adverse opinion as a result of the existence of material weaknesses described in Item 15 of the Company’s annual report on Form 20-F for the fiscal year ended December 31, 2025. During the fiscal years ended December 31, 2025 and 2024 and the subsequent interim period through July 28, 2026, there have been (i) no disagreements (as defined in Item 16F(a)(1)(iv) of Form 20-F and the related instructions thereto) with WWC on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which disagreements, if not resolved to the satisfaction of WWC, would have caused it to make reference thereto in its reports on the Company’s consolidated financial statements for such years, and (ii) no reportable events (as defined in Item 16F(a)(1)(v) of Form 20-F), except for the material weaknesses in internal control over financial reporting disclosed in Item 15 of the Company’s annual report on Form 20-F for the fiscal year ended December 31, 2025.

During the fiscal years ended December 31, 2025 and 2024 and the subsequent interim period through July 28, 2026, neither the Company nor anyone acting on its behalf consulted with Prouden regarding either (i) the application of accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company’s consolidated financial statements, and neither a written report was provided to the Company nor oral advice was provided to the Company that Prouden concluded was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issue; or (ii) any matter that was either the subject of a disagreement (as defined in Item 16F(a)(1)(iv) of the instructions to Form 20-F), or a reportable event (as defined in Item 16F(a)(1)(v) of the instructions to Form 20-F).

The Company provided WWC with a copy of the foregoing disclosures and requested that WWC furnish a letter addressed to the Securities and Exchange Commission stating whether or not it agrees with the foregoing disclosures. A copy of WWC’s letter, dated July 28, 2026, is filed as Exhibit 99.1 hereto.

The Company intends to use this Form 6-K and the accompanying exhibit to satisfy its reporting obligations under Item 16F(a) of its Form 20-F for the year ending December 31, 2026 to the extent provided in and permitted by Paragraph 2 of the Instructions to Item 16F of Form 20-F, and plans to incorporate Exhibit 99.1 by reference into its Form 20-F to the extent necessary to satisfy such reporting obligations.

EXHIBIT INDEX

Number		Description of Document
99.1		Letter from WWC, P.C. to the Securities and Exchange Commission, dated July 28, 2026.

2

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.

		Amber International Holding Limited
	By:	/s/ Josephine Ngai
	Name:	Josephine Ngai
	Title:	Chief Financial Officer

Date: July 28, 2026

3

Exhibit 99.1

July 28, 2026

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

WWC, P.C. (“WWC”) has been furnished with a copy of the Form 6-K to be filed by Amber International Holding Limited (the “Company”) on July 28, 2026. WWC does not disagree with the Company’s statements regarding WWC contained in the Form 6-K filing.

WWC has no basis to agree or disagree with other statements of the Company contained therein.

Very truly yours,

/s/ WWC, P.C.

WWC, P.C.

Certified Public Accountants

PCAOB ID: 1171

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 EXHIBIT 99.1 3.3 KB