HKEX ESG Reporting and Climate Disclosure Services (Appendix C2)


Under the HKEX Listing Rules, every listed issuer must publish an ESG report each year covering the same period as its annual report. Since 1 January 2025, the HKEX ESG Reporting Code (Appendix C2) has also included new climate-related disclosure requirements aligned with IFRS S2. GreenCo is a professional ESG advisory firm that helps Hong Kong-listed companies prepare compliant, investor-ready ESG reports and meet the new climate requirements.

HKEX Climate Disclosure Requirements at a Glance

  • Scope 1 and Scope 2 GHG emissions – mandatory for all listed issuers for financial years commencing on or after 1 January 2025.
  • Other Part D climate disclosures, including Scope 3 – "comply or explain" for Main Board issuers from 1 January 2025.
  • LargeCap issuers (Hang Seng Composite LargeCap Index constituents) – full Part D climate disclosures become mandatory for financial years commencing on or after 1 January 2026.
  • The four IFRS S2 pillars – governance, strategy (including climate scenario analysis and transition planning), risk management, and metrics and targets.

These requirements are a step on Hong Kong's roadmap towards full ISSB-aligned sustainability reporting under the Hong Kong Sustainability Disclosure Standards (HKFRS S1 and HKFRS S2), so issuers that build robust processes now will be better prepared for what comes next.

Our HKEX ESG Reporting and Climate Disclosure Services

  • Materiality assessment – identifying the ESG and climate topics that matter most to your business and stakeholders.
  • Data collection and management – designing KPIs, data templates and controls across subsidiaries and sites.
  • Report writing and development – drafting the full ESG report, board statement and climate disclosures.
  • Reporting frameworks and standards guidance – HKEX Appendix C2, IFRS S2, GRI and the GHG Protocol.
  • GHG accounting – Scope 1, Scope 2 and Scope 3 emissions calculation.
  • Climate scenario analysis – assessing the resilience of your strategy under different climate pathways.
  • Benchmarking and best practices – comparing your disclosures with peers and market leaders.
  • Stakeholder communication and engagement – surveys, interviews and workshops.
  • Integration with corporate strategy – turning disclosure findings into targets and action plans.
  • Assurance and verification – assurance of sustainability information by a CPA (Practising) under ISAE 3000.
  • Continuous improvement and strategy update – year-on-year gap analysis as rules evolve.

How We Work

  1. Gap analysis against HKEX Appendix C2 and the new climate requirements.
  2. Kick-off and data planning with clear owners, templates and timelines.
  3. Materiality, data collection and GHG calculation, reviewed by our consultants.
  4. Drafting and review of the ESG report and climate disclosures with management and the board.
  5. Finalisation and publication alongside your annual report, with optional assurance.

Related reading: Double Materiality Assessment · Climate Risk Disclosure Management · How to Evaluate Scope 3 Disclosure Quality


Why Appoint GreenCo for International Sustainability and ESG Advisory?

Since 2016, GreenCo has been trusted by public and private companies and multinational companies for reliable, standards-based ESG and sustainability advisory. We have supported more than 80 listed companies in Hong Kong, Singapore, Mainland China and South Korea, alongside private companies, IPO candidates and multinational groups.

  • International standards expertise – GRI, ISSB (IFRS S1 and S2), HKEX and SGX listing rules, the GHG Protocol, ISO 14064 and ISAE 3000.
  • All-round, one-stop advisory – strategy, materiality, reporting, GHG accounting, climate risk, ESG ratings, training and assurance under one roof.
  • Built from scratch, with you throughout – we can build your ESG framework, data processes and reports from the ground up, and our consultants stay hands-on from kick-off to sign-off.
  • Finance-grade rigour – our team combines accounting, investment and risk qualifications, so your ESG numbers stand up to auditors, regulators and investors.
  • Professional judgement, with AI as a tool – we use AI and digital tools for efficiency, but every conclusion is reviewed and owned by qualified consultants.
  • Assurance capability – assurance services performed by a CPA (Practising) in accordance with ISAE 3000.

Our Team's Professional Credentials

  • Fellow Certified Public Accountant (FCPA)
  • Chartered Financial Analyst (CFA) – CFA Institute
  • Financial Risk Manager (FRM) – Global Association of Risk Professionals (GARP)
  • Certified ESG Analyst (CESGA)
  • Sustainable Investing Certificate – CFA Institute
  • GRI Certified Professional
  • Practitioner Member – Institute of Sustainability and Environmental Professionals (ISEP)
  • GRI Certified Sustainability Professional – Global Reporting Initiative (GRI)

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