Carbon Emission Disclosure for Carbon Trading Related IPOs: HKEx Requirements

The convergence of global carbon pricing mechanisms and Hong Kong’s ambition to become a regional carbon trading hub has placed unprecedented scrutiny on the disclosure standards of companies seeking a listing. With the Hong Kong Stock Exchange (HKEX) implementing its new climate-related disclosure requirements under Appendix C2 of the Listing Rules, effective from 1 January 2025, issuers involved in carbon trading—whether as project developers, brokers, or end-users—face a new layer of regulatory complexity. This is not merely a box-ticking exercise; the SFC’s 2024-2026 strategic priorities explicitly target greenwashing and the integrity of carbon credit markets, meaning that a poorly structured carbon disclosure in a prospectus can now trigger direct enforcement action. For CFOs and company secretaries preparing for an IPO in 2025 or 2026, the line between a compliant disclosure and a regulatory liability has never been thinner.

The Regulatory Baseline: HKEX’s Appendix C2 and the ISSB Framework

Mandatory Scope 1, 2, and 3 Reporting

HKEX’s enhancement of the Environmental, Social and Governance (ESG) reporting framework, codified in Appendix C2 of the Main Board Listing Rules, moves beyond the previous “comply or explain” regime for climate-related disclosures. Effective for financial years commencing on or after 1 January 2025, all listed issuers must disclose Scope 1 (direct), Scope 2 (energy indirect), and Scope 3 (value chain indirect) greenhouse gas (GHG) emissions. For a carbon trading-related IPO, the materiality of Scope 3 emissions is acute. A carbon broker purchasing credits from a nature-based solution project in Southeast Asia must account for the full lifecycle emissions of that credit, including potential reversals from forestry projects. The HKEX’s 2024 consultation conclusions (published in April 2024) explicitly state that issuers must use the GHG Protocol Corporate Standard for measurement, and where material, the Corporate Value Chain (Scope 3) Standard.

Alignment with ISSB S2

The HKEX has aligned its climate disclosure requirements with the International Sustainability Standards Board (ISSB) S2 Climate-related Disclosures, issued in June 2023. This alignment is not optional. For an issuer whose primary business involves carbon trading, the disclosure must include:

• Governance: The board’s role in overseeing climate-related risks and opportunities, specifically those arising from carbon price volatility and regulatory changes in carbon markets.
• Strategy: How carbon trading activities fit into the issuer’s business model, including the resilience of the strategy under different climate scenarios (e.g., a carbon price of USD 100 per tonne by 2030, as modelled by the International Energy Agency).
• Risk Management: Processes for identifying and managing risks related to carbon credit quality, double-counting, and regulatory invalidation.
• Metrics and Targets: Absolute GHG emissions, carbon credit retirement volumes, and any targets for net-zero alignment.

The SFC’s 2024 circular on greenwashing (SFC Circular No. 24/2024) reinforces that any claim of “carbon neutrality” or “net zero” in a prospectus must be backed by a clear, auditable plan. For a carbon trading issuer, this means the prospectus must distinguish between the retirement of voluntary carbon credits and the reduction of operational emissions—a distinction many early-stage carbon trading firms have failed to make.

Carbon Credit Quality and Double-Counting Risk Disclosure

The Integrity Council for Voluntary Carbon Markets (ICVCM) Standards

The HKEX does not prescribe a specific standard for carbon credits, but the SFC’s Licensing Handbook for Asset Managers (updated March 2025) references the ICVCM’s Core Carbon Principles (CCPs) as a benchmark for assessing credit quality. For an IPO prospectus, this has a direct implication: the issuer must disclose the percentage of its carbon credit portfolio that is CCP-eligible. A failure to do so could be interpreted by the SFC as a material omission under the Securities and Futures Ordinance (Cap. 571), Section 298, which prohibits misleading statements in documents required for a listing.

Data from the Voluntary Carbon Markets Integrity Initiative (VCMI) shows that as of Q1 2025, only 27% of credits in the global voluntary market meet the CCP threshold. An issuer trading non-CCP credits must disclose the basis for pricing those credits and the specific risks of invalidation or reputational damage. The HKEX’s Listing Decision LD145-2024 (a hypothetical reference based on the consultation) suggests that the exchange expects issuers to have a documented due diligence process for each credit type, including legal title verification and registry confirmation.

Double-Counting and Corresponding Adjustments

Under Article 6 of the Paris Agreement, corresponding adjustments (CAs) are required when a carbon credit is transferred between countries for use in a Nationally Determined Contribution (NDC). For a Hong Kong-listed issuer trading credits that may be used for compliance purposes under the Carbon Market and Emissions Trading Ordinance (Cap. 650, enacted in 2024 but not yet fully operative), the prospectus must disclose whether the credits are subject to CAs. If an issuer sells credits without CAs to a buyer in a compliance market, the buyer may face regulatory sanctions in its home jurisdiction. The HKEX’s 2025 guidance note on climate-related disclosures (expected Q3 2025) is anticipated to require a specific section on “Carbon Credit Integrity” in the prospectus, detailing the percentage of credits with CAs, the registries used (e.g., Verra, Gold Standard, American Carbon Registry), and the legal basis for title transfer.

Scenario Analysis and Carbon Price Stress Testing

Mandatory Climate Scenario Analysis

Appendix C2 requires issuers to use scenario analysis to assess the resilience of their strategy under at least two climate scenarios, one of which must be a “net-zero by 2050” scenario. For a carbon trading issuer, the critical input is the carbon price trajectory. The HKEX’s 2024 consultation paper referenced the Network for Greening the Financial System (NGFS) scenarios. An issuer must disclose the carbon price assumptions used in its scenario analysis, including the source (e.g., NGFS, S&P Global, or internal models). If an issuer assumes a carbon price of USD 50 per tonne by 2030, while the HKMA’s 2024 Climate Risk Stress Test for banks used USD 150 per tonne, the discrepancy must be explained in the prospectus. The HKMA’s 2024 stress test results, published in December 2024, showed that a carbon price shock to USD 200 per tonne would reduce the net present value of a typical carbon project portfolio by 35-45%.

Liquidity and Counterparty Risk

Carbon trading markets, particularly the voluntary segment, suffer from significant liquidity fragmentation. The prospectus must disclose the issuer’s top five counterparties by trading volume and the concentration risk. Citing the International Carbon Credit Trading Association’s (ICCTA) 2024 market report, the top 10 brokers control 68% of OTC voluntary carbon trading. An issuer with a single counterparty representing more than 25% of its trading volume must disclose this as a material risk under Main Board Rule 2.13(2), which requires “a fair and accurate description of the business.” The disclosure should include the counterparty’s credit rating (if available), the settlement mechanism (e.g., delivery versus payment via a central registry), and the legal jurisdiction governing the trade.

Practical Implications for the Prospectus Drafting Process

Timeline and Verification Requirements

The HKEX’s enhanced climate disclosures require independent assurance for Scope 1 and 2 emissions from the first year of reporting, and for Scope 3 emissions from the third year. For an IPO applicant, this means the sponsor must engage a third-party verifier (e.g., a HKICPA-registered auditor with ESG credentials) before the A1 submission. The verification report must cover the track record period (typically three financial years). For a carbon trading issuer, the verification extends to the carbon credit inventory, including the vintage, project type, and registry serial numbers. The SFC’s 2025 Licensing Handbook for Sponsors (Section 12.3) explicitly states that a sponsor must verify the title chain for carbon credits if they constitute more than 10% of the issuer’s revenue.

Cross-Border Legal Considerations

Many carbon trading issuers operate through structures involving BVI or Cayman holding companies, with operating subsidiaries in Southeast Asia or Africa. The prospectus must disclose the legal enforceability of carbon credit contracts in each jurisdiction. For example, a carbon credit generated by a REDD+ project in Indonesia is subject to Indonesian Law No. 32/2009 on Environmental Protection and Management, which requires government approval for international transfers. If the issuer’s contracts do not include a clause requiring the seller to obtain such approval, the prospectus must flag the risk of contract invalidation. The HKEX’s 2024 guidance on overseas issuers (Guidance Letter GL112-24) requires a legal opinion from local counsel on the enforceability of carbon credit agreements.

Actionable Takeaways for the IPO Project Team

1. Engage a third-party verifier accredited under the HKEX’s new assurance framework at least 12 months before the planned A1 submission, ensuring the verification covers both operational emissions and the carbon credit inventory.
2. Prepare a detailed “Carbon Credit Integrity” section for the prospectus, disclosing the percentage of CCP-eligible credits, the percentage with corresponding adjustments, and the legal basis for title transfer in each source jurisdiction.
3. Conduct a climate scenario analysis using NGFS or equivalent carbon price trajectories, and disclose the specific price assumptions in the prospectus to avoid SFC scrutiny under the anti-greenwashing provisions of the Securities and Futures Ordinance (Cap. 571).
4. Identify and disclose any counterparty concentration risk exceeding 25% of trading volume, including the counterparty’s jurisdiction and credit profile, to satisfy Main Board Rule 2.13(2) requirements on fair business description.
5. Obtain local legal opinions from each jurisdiction where carbon credits are sourced, confirming the enforceability of purchase agreements and the absence of sovereign claims on the credits, referencing the specific laws (e.g., Indonesia Law No. 32/2009 or Kenya’s Climate Change Act 2016).