Post-Listing Corporate Governance Report Writing: Aligning Hong Kong and US Disclosure Standards

The decision by the Hong Kong Stock Exchange (HKEX) to mandate climate-related disclosures aligned with the International Sustainability Standards Board (ISSB) framework, effective for fiscal years commencing on or after 1 January 2025, has created a structural divergence for dual-listed companies. Issuers with a primary or secondary listing on the Main Board of HKEX and a concurrent listing on the NYSE or Nasdaq must now reconcile the HKEX’s prescriptive, rule-based approach under Appendix C2 of the Main Board Listing Rules with the US Securities and Exchange Commission’s (SEC) principles-based, materiality-driven regime under Regulation S-K and Regulation S-X. This is not merely a compliance exercise; it is a strategic reporting challenge where the same corporate action—a board evaluation, a related-party transaction, or a climate risk assessment—must be narrated through two distinct regulatory lenses. For Hong Kong-based CFOs and company secretaries, the risk of material misstatement or omission in one jurisdiction’s filing, even if the other is compliant, has risen sharply. The 2024 enforcement actions by the SEC against several China-based issuers for inadequate internal control over financial reporting (ICFR) disclosures, coupled with the HKEX’s 2023 consultation conclusions on enhanced corporate governance requirements, underscore that the gap between the two regimes is widening, not narrowing.

The Structural Divergence in Governance Disclosure Requirements

The foundational difference between HKEX and SEC corporate governance disclosure standards lies in their regulatory philosophy. HKEX operates a “comply or explain” model codified in the Corporate Governance Code (CG Code) under Appendix 14 of the Main Board Listing Rules, which sets out 14 principles and 113 code provisions. The SEC, by contrast, requires specific itemised disclosures under Regulation S-K, particularly Item 407 (corporate governance) and Item 401 (director qualifications), but allows issuers to omit information that is not material to a reasonable investor. For a dual-listed company, this creates a reporting asymmetry: what is mandatory in Hong Kong may be optional in the US, and vice versa.

The Board Composition and Independence Calculus

Under HKEX Listing Rule 3.10, every board must have at least three independent non-executive directors (INEDs), and at least one-third of the board must be independent. The CG Code further requires that INEDs constitute a majority of the board if the chairman is not an independent director (Code Provision A.2.1). The SEC, under Rule 10A-3 of the Securities Exchange Act of 1934, mandates that listed companies have a majority of independent directors on the board, but does not prescribe a fixed numerical threshold for INEDs. The practical consequence for a Hong Kong-incorporated, US-listed company is that its board composition must satisfy the higher of the two standards. Data from HKEX’s 2024 Corporate Governance Review indicates that 92.4% of Main Board issuers had a board with at least one-third INEDs, but only 74.1% met the US majority-independent threshold—a gap that dual-listed companies must close through additional director appointments.

The Nomination and Remuneration Committee Mandate

HKEX’s CG Code requires the establishment of a nomination committee chaired by the board chairman or an INED (Code Provision B.3.1), and a remuneration committee chaired by an INED (Code Provision B.1.1). The SEC, under Item 407(e), requires disclosure of the processes for nominating directors and the role of the compensation committee, but does not mandate the existence of either committee as a listing standard. For a dual-listed company, the HKEX requirement is binding, meaning that the corporate governance report filed with the HKEX must detail the committee’s charter, membership, and meeting frequency, while the SEC Form 20-F or proxy statement can simply state that the committee exists and describe its processes. The risk arises when the HKEX report includes specific committee findings—such as a negative recommendation on director re-election—that the US filing omits, potentially triggering a material omission claim under Rule 10b-5.

Climate-Related Disclosures: The ISSB-SEC Tension

The most significant new disclosure divergence stems from climate-related reporting. HKEX’s new climate disclosure requirements, effective for fiscal years beginning on or after 1 January 2025, are based on the ISSB’s IFRS S2 standard and are mandatory for all Main Board issuers. The SEC’s climate disclosure rules, adopted in March 2024 but currently stayed pending litigation in the Eighth Circuit Court of Appeals, require disclosure of Scope 1 and Scope 2 greenhouse gas (GHG) emissions only when material, and do not require Scope 3 disclosures. This creates a direct compliance conflict for dual-listed companies.

Scope 3 Emissions: Mandatory in Hong Kong, Optional in the US

Under HKEX’s new Appendix C2, issuers must disclose Scope 3 GHG emissions (value chain emissions) unless they can demonstrate that doing so would be commercially prejudicial or technically infeasible. The SEC’s final rule, by contrast, explicitly excludes Scope 3 emissions from mandatory disclosure. A Hong Kong-based company with a US listing that operates a supply chain across the Greater Bay Area must therefore compile and disclose Scope 3 data for its HKEX filing, while the same data may be omitted from its SEC filing. The operational burden is substantial: a 2024 survey by the Hong Kong Institute of Certified Public Accountants (HKICPA) found that 68% of Hong Kong-listed companies lacked the data systems to calculate Scope 3 emissions accurately. The compliance cost for dual-listed companies is estimated at HKD 2.5 million to HKD 5 million per year for data collection and assurance, according to HKEX’s own impact assessment published in April 2024.

Scenario Analysis and Transition Plans

HKEX’s climate rules require issuers to conduct scenario analysis to assess the resilience of their business model to climate-related risks, and to disclose their transition plans, including specific targets and milestones. The SEC’s rules, as adopted, require disclosure of transition plans only if the issuer has adopted one, and do not mandate scenario analysis. For a dual-listed company, this means that the HKEX corporate governance report must include a detailed scenario analysis—typically using the Network for Greening the Financial System (NGFS) scenarios—while the SEC filing can state that the company is evaluating its exposure. The divergence creates a legal risk: if the HKEX report identifies a material climate risk that the US filing does not address, the SEC may view the omission as a violation of Regulation S-K Item 105 (risk factors), which requires disclosure of the most significant risks to the company.

Internal Control Over Financial Reporting (ICFR) and Board Oversight

The Sarbanes-Oxley Act of 2002 (SOX) imposes stringent ICFR requirements on US-listed companies, including Section 404(a) management assessment and Section 404(b) auditor attestation for accelerated filers. HKEX does not have a direct equivalent; instead, it requires issuers to disclose in the corporate governance report how the board has reviewed the effectiveness of the internal control and risk management systems (CG Code Provision D.2.1). The gap in assurance standards is material.

The Auditor Attestation Requirement

For a dual-listed company that is an accelerated filer under SEC rules (public float above USD 75 million), the auditor must issue an attestation report on the effectiveness of ICFR under PCAOB AS 2201. HKEX requires no such external assurance. The consequence is that the same internal control system must be tested to two different standards: the PCAOB’s top-down, risk-based approach for the US filing, and the HKEX’s principles-based, board-review approach for the Hong Kong filing. A 2023 study by the Hong Kong Institute of Directors found that 41% of dual-listed companies reported discrepancies between their ICFR assessments for HKEX and SEC filings, primarily because the PCAOB standard requires identification of control deficiencies at a lower materiality threshold. For example, a control deficiency that is a “significant deficiency” under PCAOB standards may not be reportable under HKEX’s CG Code, creating a disclosure gap that could be exploited in shareholder litigation.

The Board’s Role in Risk Oversight

HKEX’s CG Code requires the board to conduct an annual review of the effectiveness of the risk management and internal control systems, and to disclose the process in the corporate governance report (Code Provision D.2.2). The SEC, under Item 303 of Regulation S-K, requires management’s discussion and analysis (MD&A) of the company’s financial condition, including known trends and uncertainties, but does not mandate a separate board-level review of controls. For a dual-listed company, the HKEX report must therefore include a detailed description of the board’s risk oversight structure—including the role of the audit committee, the risk management committee (if any), and the frequency of board reviews—while the SEC filing can be more concise. The risk is that the HKEX report may disclose a specific control weakness that the SEC filing does not, leading to a potential SEC enforcement action for incomplete disclosure.

Practical Steps for Aligning the Two Reports

The compliance burden for dual-listed companies can be managed through a structured approach that treats the HKEX corporate governance report and the SEC Form 20-F or proxy statement as two outputs of a single, integrated disclosure process. The following steps are based on guidance from the Hong Kong Stock Exchange’s 2024 “Guide on Environmental, Social and Governance (ESG) Reporting and Climate Disclosures” and the SEC’s Division of Corporation Finance’s 2023 sample comment letters.

Establish a Dual-Jurisdiction Disclosure Matrix

The first step is to create a matrix that maps every HKEX CG Code provision and SEC Regulation S-K item to the company’s actual governance practices. This matrix should identify which disclosures are mandatory in both jurisdictions, which are mandatory in one but optional in the other, and which are subject to different materiality thresholds. For example, HKEX Code Provision A.5.1 (board diversity policy) is mandatory for HKEX but only recommended by the SEC under the Nasdaq board diversity rule. The matrix should be updated annually, as both HKEX and SEC rules evolve. A 2024 survey by the Hong Kong Corporate Governance Association found that 62% of dual-listed companies that adopted such a matrix reduced their disclosure preparation time by 30% or more.

Align the Board Evaluation Process

HKEX’s CG Code requires an annual board evaluation, with the results disclosed in the corporate governance report (Code Provision B.6.1). The SEC does not require board evaluations, but the proxy statement must disclose the process for evaluating director performance under Item 407(e). The practical solution is to conduct a single, comprehensive board evaluation that satisfies both standards: the evaluation should cover board composition, independence, committee effectiveness, and individual director performance, and the results should be summarised in both filings. The HKEX report must include the evaluation methodology and key findings, while the SEC filing can focus on the process for determining director nominations. The key is to ensure that no material finding in the HKEX report is omitted from the SEC filing.

Standardise the Climate Disclosure Language

Given the divergence in Scope 3 emissions and scenario analysis requirements, dual-listed companies should adopt a “comply with the higher standard” approach for climate disclosures. This means preparing a single climate disclosure document that meets HKEX’s ISSB-aligned requirements, and then using that document as the basis for the SEC filing, omitting only those elements that are explicitly excluded by SEC rules (such as Scope 3 emissions if immaterial). The SEC filing should include a cross-reference to the HKEX climate disclosure, noting that additional information is available in the Hong Kong corporate governance report. This approach reduces the risk of material omission while maintaining compliance with both regimes. The HKEX’s 2024 consultation paper on climate disclosures explicitly encourages issuers to use a single, global reporting framework to reduce duplication.

Actionable Takeaways

1. Dual-listed companies must treat the HKEX corporate governance report and the SEC Form 20-F as two outputs of a single, integrated disclosure process, not as separate compliance exercises.
2. Establish a dual-jurisdiction disclosure matrix that maps every HKEX CG Code provision and SEC Regulation S-K item to the company’s actual governance practices, and update it annually.
3. Conduct a single, comprehensive board evaluation that satisfies both HKEX’s mandatory annual requirement and the SEC’s disclosure requirements under Item 407(e).
4. Adopt a “comply with the higher standard” approach for climate disclosures, using HKEX’s ISSB-aligned requirements as the baseline and omitting only those elements explicitly excluded by SEC rules.
5. Engage external legal counsel in both Hong Kong and the US to review the cross-referencing between the two filings, particularly for climate-related risk disclosures and ICFR assessments, to minimise the risk of material omission claims.