The Global Reporting Initiative (GRI) is the world’s leading sustainability disclosure standard-setter, established in 1997 as an independent international organisation. Its instrument is the GRI Standards — a modular framework structured around three layers (Universal, Sector, Topic) for disclosing economic, environmental, and social impacts. Per KPMG’s Survey of Sustainability Reporting, GRI is used by 78%+ of the N100 (the 100 largest companies by revenue in each of 58 countries) and ~73% of the G250 globally. For Thai SET-listed corporates, GRI is the implicit shape of the 56-1 One Report sustainability section — and the framework most ESG investors, rating agencies, and analysts read first. From 2026, IFRS S1/S2 financial-materiality disclosure becomes mandatory alongside, creating double-materiality disclosure for sophisticated reporters.

Honest scoping: the credential describes Othello bench’s GRI Standards competence, acquired through the FTPI training cohort in June 2023. FTPI is Federation of Thai Industries — Thailand’s local GRI Certified Training Partner. The credential is bench-level applied competence in the 2021 Universal Standards (GRI 1, 2, 3), the Topic Standards architecture, and the impact-materiality methodology. It is not a separate “GRI-Authorised Trainer” credential that would entitle Othello to deliver GRI training on its own behalf — that is a different credential held by CTP organisations. Othello applies GRI Standards at engagement — consultative work helping Thai SET-listed corporates prepare GRI-aligned 56-1 One Report sustainability sections or standalone GRI sustainability reports. Verification: Othello provides FTPI/GRI training certificate copies under mutual NDA on request.

Three layers, increasing specificity. Universal Standards (GRI 1, 2, 3) apply to every GRI reporter regardless of industry — they set the reporting principles, the always-required general disclosures, and the impact-materiality methodology. Sector Standards (GRI 11 Oil & Gas, GRI 12 Coal, GRI 13 Agriculture, GRI 14 Mining as of 2024-2025, more in development) apply to organisations in covered industries and identify topics likely to be material for the sector. Topic Standards (the 200/300/400 series — 30+ standards) contain disclosure requirements for specific economic, environmental, and social topics. An organisation reports against the Topic Standards corresponding to its material topics list, not all standards always.

GRI 3: Material Topics 2021 codifies the four-step impact-materiality process the organisation uses to identify which Topic Standards apply: (1) understand the organisation’s context, (2) identify actual and potential impacts on the economy, environment, and people including human rights, (3) assess significance of the impacts, (4) prioritise the most significant impacts for reporting. The output is the list of material topics — the topics the organisation reports against. It is critical because: GRI 3 is the centerpiece of the 2021 rewrite (replacing the older “topic boundary” concept); externally-assured GRI reports stand or fall on whether GRI 3 was applied correctly; and impact materiality is the disclosure dimension that distinguishes GRI from financial-materiality frameworks like IFRS S1/S2. Rushed or template-driven GRI 3 work is the most common cause of “in accordance” claim failures during external assurance review.

Two claim levels, different commitment depth. “Reported in accordance with the GRI Standards” is the higher commitment — requires reporting against every applicable Topic Standard at all required disclosures, with the GRI 3 materiality process fully documented, the GRI Reference Table complete, and the applicable Sector Standard addressed where the organisation is in a covered sector. “Reported with reference to the GRI Standards” is the lower commitment — allows selective use of GRI Standards with disclosed limitations. Both are legitimate claims; the difference is the integrity signal strength. Most Thai SET-listed corporates aspiring to capital-market-grade ESG disclosure work toward the in-accordance claim — and the work involves both methodology and documentation depth, which is where Othello’s engagement value lives.

They cover different sides of double materiality. GRI covers impact materiality — impacts on the economy, environment, and people. IFRS S1/S2 (issued by the ISSB and becoming mandatory Thai SEC disclosure from 2026) covers financial materiality — sustainability matters affecting enterprise value. CSRD/ESRS (EU mandate for large companies) requires both — and was explicitly designed with GRI interoperability. The three frameworks are designed to work together, not compete — GRI and ISSB have a formal collaboration agreement; GRI and EFRAG (which develops ESRS) have published joint interoperability index documents. A Thai SET-listed corporate building its 2026 disclosure stack around GRI 2021 + IFRS S1/S2 inherits TCFD and SASB compatibility largely automatically, and is well-positioned for any EU CSRD scope exposure via parent-company consolidation.

The Thai Securities and Exchange Commission’s 56-1 One Report integrates annual financial reporting and sustainability reporting into a single mandatory disclosure document for all SET-listed corporates. The sustainability section is implicitly GRI-shaped — with materiality assessment, stakeholder engagement, climate disclosure, and ESG data tables all reflecting GRI architecture. From 2026, IFRS S1/S2 climate and sustainability disclosures additionally become mandatory in the 56-1 sustainability/climate section. Many SET-listed corporates publish their full GRI report as a standalone document alongside the 56-1 One Report, with the 56-1 summarising key GRI disclosures and cross-referencing. Othello scopes 56-1 sustainability section preparation against both GRI 2021 and IFRS S1/S2 simultaneously — recognising the convergent disclosure architecture from 2026 onward.

For a first GRI report engagement, typically 4-6 months end-to-end: 2-4 weeks engagement scoping and reporting-boundary decisions, 4-8 weeks impact-materiality assessment per GRI 3 (the longest stage; involves stakeholder engagement), 6-10 weeks Topic Standards data collection and drafting, 2-4 weeks Universal Standards drafting and GRI Reference Table compilation, 2-4 weeks internal review and management approval, optional 4-8 weeks parallel external assurance engagement. For subsequent annual cycles, typically 8-14 weeks — shorter because the materiality assessment is updated rather than rebuilt, and most data infrastructure is in place. Binding constraints are usually client-side data availability for new Topic Standards, management-review calendars, and (for assured reports) the assurance provider’s calendar coordination. Engagement letter issuance within 1 business day of scoping.

Yes — but never simultaneously on the same engagement as the consultative GRI work, to preserve independence. The bench separation is deliberate: consultative GRI engagement work (helping a client prepare a defensible report) is one engagement letter; independent assurance on the published report (AA1000AS v3 or ISAE 3000) is a separately-scoped engagement, by separate practitioners, under a different engagement letter. Panit Chancharoonpong holds AA1000AS ACSAP and ISO 14064 Lead Auditor credentials for assurance engagements; the GRI consultative bench is anchored separately. Clients commonly engage Othello for both, but never via the same engagement letter and never with the same practitioner anchoring both sides. See /certifications/aa1000as/.

GRI 2021 Standards competence is one of Othello’s three reporting-framework anchors, alongside IFRS S1/S2 (mandatory Thai SEC 2026) and FTSE Russell ESG Scores. Together with Panit’s seven-credential ESG-assurance cluster (AA1000AS, ISO 14064, TGO, Verra, CORSIA, ICVCM, ISCC PLUS), the firm operates the full sustainability-disclosure stack a Thai SET-listed corporate needs for 2026+ — from impact-materiality assessment (GRI) through financial-materiality disclosure (IFRS S1/S2) through external assurance (AA1000AS / ISO 14064-3 / ISAE 3000) through carbon-credit verification (TGO / Verra / CORSIA / ICVCM CCP / ISCC PLUS). Founded 2020 on US Government bilingual contracts under FAR-grade contractor verification, the firm’s procurement-grade audit-trail standard applies to GRI engagements the same way it applies to ATA-certified translation or 56-1 One Report disclosure. One engagement letter, one NDA from first email, one audit-trail Bangkok-side, twenty credentials behind it. อีเมล [email protected] or call +66 02-859-2145.