The HKEX has fundamentally reshaped ESG disclosure in Hong Kong. Here's everything compliance teams, company secretaries, and finance professionals need to know about the 2026 requirements — who must report, what must be disclosed, climate-related reporting, ISSB alignment timelines, and penalties for non-compliance.
By Peak M&S Education Centre · Updated July 2026 · 12 min read
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If your company is listed on the Hong Kong Stock Exchange, the ESG reporting landscape changed fundamentally. What was once a voluntary, box-ticking exercise is now a mandatory, ISSB-aligned climate disclosure regime with real regulatory teeth. Compliance teams that aren't prepared risk regulatory action, reputational damage, investor backlash, and restricted access to green finance.
This comprehensive guide covers the HKEX ESG disclosure requirements for 2026: what must be disclosed, who needs to report, climate-related disclosure rules, the ISSB alignment timeline, requirements by company size, penalties for non-compliance, and how professional ESG training can close the skills gap.
The HKEX ESG disclosure requirements are governed by Appendix C2 (formerly Appendix 27) of the Main Board Listing Rules. The framework requires all listed companies to publish an annual ESG report covering environmental (E), social (S), and governance (G) matters. Starting from financial years beginning on or after 1 January 2025, the HKEX upgraded this framework to require mandatory climate-related disclosures aligned with the International Sustainability Standards Board (ISSB) standards — specifically IFRS S2 Climate-related Disclosures.
The key shift is from "comply or explain" to mandatory compliance. Previously, listed companies could opt out of certain ESG disclosures by providing an explanation. Now, for in-scope issuers, climate-related disclosures are mandatory with no explain option. This means every required climate disclosure item must be addressed.
All companies listed on the HKEX Main Board and GEM must produce ESG reports. However, the enhanced climate disclosure requirements are being phased in based on issuer classification:
| Issuer Type | Climate Disclosures | Effective From | Scope 1-2 | Scope 3 |
|---|---|---|---|---|
| Main Board Large Cap HSCI Large Cap constituents |
Mandatory | FY2025 | Mandatory | Phased in |
| Main Board (other) Non-Large Cap issuers |
Mandatory (phased) | FY2026-2028 | Mandatory | Modified |
| GEM Board | Comply or explain | FY2025 | Comply/explain | Not required |
| Secondary listing | Same as primary | Per classification | Per classification | Per classification |
The phasing approach gives smaller issuers additional time to build capacity, but the direction of travel is clear: all Main Board issuers will eventually face mandatory climate disclosures. Companies that delay preparation are simply deferring an inevitable cost — and making it harder by starting late.
The HKEX climate disclosure requirements are structured around four core pillars, aligned with both the ISSB (IFRS S2) and TCFD frameworks:
Disclose how the board and management oversee climate-related risks and opportunities. This includes: which board committee is responsible, how climate considerations are integrated into business strategy, how management monitors implementation, and the frequency of board-level review. Companies must demonstrate that climate governance is embedded in the organisational structure — not delegated to a junior sustainability officer with no real authority.
Disclose the climate-related risks and opportunities that materially affect the business, grouped into transition risks (policy changes, technology shifts, market disruption, reputational) and physical risks (acute: typhoons, floods; chronic: sea-level rise, temperature changes). Companies must conduct climate scenario analysis — typically using 1.5°C, 2°C, and 3°C warming scenarios — and explain how climate considerations are reflected in financial planning. Read our detailed TCFD vs ESG standards guide for the methodology.
Describe the processes for identifying, assessing, and prioritising climate-related risks, and how these are integrated into the company's overall enterprise risk management (ERM) framework. This pillar requires a description of actual processes, not just policy statements.
Disclose the metrics used to assess climate risks, including Scope 1 (direct), Scope 2 (purchased energy), and phased Scope 3 (value chain) greenhouse gas emissions in tonnes of CO2 equivalent. Companies must also disclose transition plans, carbon reduction targets, and progress against those targets. Our Scope 1-3 carbon accounting guide walks through the methodology in detail.
One of the most significant changes is the requirement to report greenhouse gas emissions using the GHG Protocol methodology:
For most compliance teams, Scope 3 is the most challenging. It requires data collection across the entire value chain, engagement with suppliers, and making reasonable estimates where data gaps exist. Read our dedicated Scope 3 emissions guide for practical approaches to value chain emissions measurement.
The HKEX is aligning its ESG framework with the International Sustainability Standards Board (ISSB) standards, published as IFRS S1 (General Requirements) and IFRS S2 (Climate-related Disclosures). The alignment timeline:
This means Hong Kong's ESG reports will be directly comparable with reports from London, Tokyo, Singapore, Frankfurt, and Sydney. Investors can assess climate risk consistently across markets — which also means inadequate or inaccurate disclosures stand out more starkly. Read our full ISSB standards compliance guide for the detailed framework.
The consequences of non-compliance are serious and escalating. Companies that fail to meet HKEX ESG disclosure requirements face:
The gap between what HKEX requires and what most compliance teams can currently deliver is enormous. Building internal capacity requires action in five areas:
1. Governance structure: Establish clear board-level oversight of climate risk. Designate a board committee (typically Audit or a dedicated Sustainability Committee) with explicit terms of reference.
2. Emissions inventory: Build a complete GHG inventory covering Scope 1, 2, and relevant Scope 3 categories. This requires cross-functional data collection — facilities for energy data, procurement for supplier emissions, HR for commuting, finance for travel expenses.
3. Climate risk assessment: Identify and assess both transition and physical risks. Conduct climate scenario analysis using recognised pathways (1.5°C, 2°C, 3°C or 4°C).
4. Target-setting: Set measurable, science-aligned emissions reduction targets. Disclose transition plans with milestones and timeframes.
5. Staff training: Equip compliance, finance, and operations teams with ESG reporting skills. The ESG Sustainable Solutions 4.0 course at Peak M&S covers the complete framework — from HKEX requirements to hands-on carbon accounting.
The ESG Sustainable Solutions 4.0 course at Peak M&S Education Centre is designed specifically to close the skills gap between what HKEX requires and what most compliance teams can currently deliver. The curriculum covers:
Taught by experienced industry practitioners, the course is taught in Cantonese with English ESG terminology, includes a formal certificate of completion, and qualifies for government training subsidies up to HK$10,000 via the RTTP and GSF funding schemes. Weekend classes mean you don't need to take annual leave.
HKEX ESG compliance is not a once-a-year task — it's an ongoing organisational capability that needs to be built and maintained. Companies that start preparing now will find the reporting cycle manageable. Those that wait until the deadline approaches will face last-minute scrambles, expensive consultancy fees, and the risk of inadequate or non-compliant disclosure.
Contact us or WhatsApp +852 4423 7445 to enrol your team. Next intake: 25-26 July 2026. Professional cohort sizes ensure personalised attention.
What are the HKEX ESG disclosure requirements for 2026?
HKEX-listed companies must comply with mandatory climate disclosures aligned with ISSB (IFRS S2) standards. This includes governance, strategy, risk management, and metrics/targets disclosures, plus mandatory Scope 1 and 2 GHG emissions reporting. Scope 3 is phased in for larger issuers. The requirements apply to Main Board Large Cap issuers from FY2025 and are progressively extended to other issuers through 2026-2028.
Who needs to report under HKEX ESG requirements?
All companies listed on the HKEX Main Board and GEM must produce ESG reports. From FY2025, Main Board Large Cap issuers must comply with enhanced mandatory climate disclosures. Other Main Board issuers are phased in over 2026-2028. All listed companies must publish an ESG report annually within 5 months of the financial year-end.
What climate-related disclosures are mandatory?
Mandatory climate-related disclosures cover four core areas aligned with ISSB/TCFD: (1) Governance — how the board oversees climate risks; (2) Strategy — climate-related risks and opportunities, including scenario analysis; (3) Risk Management — how climate risks are identified and integrated; (4) Metrics and Targets — Scope 1, 2 and phased Scope 3 GHG emissions, transition plans, and carbon reduction targets.
When does HKEX align with ISSB standards?
HKEX adopted ISSB-aligned climate disclosure requirements (based on IFRS S2) effective for financial years beginning on or after 1 January 2025 for Main Board Large Cap issuers. Subsequent phases extend to other issuers through 2026-2028. Full ISSB alignment (including IFRS S1 general sustainability disclosures) is expected to follow.
What are the penalties for non-compliance with HKEX ESG reporting?
Non-compliant companies face regulatory action including public sanctions, requests for remedial disclosure, and in serious cases trading suspension. Deliberately false or misleading ESG information can attract securities law liability. ESG rating agencies penalise companies with inadequate disclosures, affecting investor confidence, ESG fund inclusion, and access to green finance.
Master ISSB-aligned climate disclosures, HKEX ESG reporting, and carbon accounting. Next intake: 25-26 July 2026. Government funding up to HK$10,000 available.
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