The 2026
FTSE Russell
Transition
An ESG disclosure & bilingual reporting playbook for SET-listed companies — from the firm that builds the report and renders every word in English and Thai.
The 2026 shift
The Stock Exchange of Thailand has retired its own ESG rating. From 2026, the whole market is scored on FTSE Russell methodology — and the bar moved for every listed company, not only the 265 that once held a rating.
For five years, a Thai company's ESG standing was expressed as a SET ESG Rating. 2025 was the last year of that framework. From 2026 the SET publishes FTSE Russell ESG Scores instead — a globally consistent model of three pillars, fourteen themes and well over a hundred indicators per company, assessed entirely from what a company discloses in public.
At the same time, IFRS S2 / ISSB is phasing into mandatory Thai reporting — climate-first, with limited assurance on Scope 1 and 2 emissions. The two forces point the same way: disclosure is no longer a compliance formality. It is a scored, benchmarked, investor-facing asset — and it is read in two languages at once.
Phase-in cohorts follow the SEC's published ISSB roadmap; exact effective dates are confirmed on gazettal.
How ESG is scored in Thailand now
FTSE Russell builds a score from the bottom up: exposure decides which themes matter, disclosure decides how you score on them, and climate is scored by a different mechanism entirely.
5 themes
5 themes
4 themes
Exposure sets the bar. Each theme carries an exposure level — high, medium or low — driven by your sector. High exposure means the theme weighs more and is judged against a stricter standard. A logistics firm and a software firm are not held to the same climate bar.
Climate is the exception. The Climate Change theme is not scored by counting disclosure points. It runs on TPI Management Quality — a staircase from Level 0 to Level 5 — plus carbon performance versus peers. Policy, then targets, then Scope 1/2, then board oversight and verified Scope 3, then scenario analysis and internal carbon pricing, then a financed-transition plan.
The legacy SET ESG Rating still governs ThaiESG-fund eligibility through December 2026, and the 56-1 One Report keeps its comply-or-explain GHG expectation. But the direction of travel is unambiguous: optimise for FTSE Russell, disclose to IFRS S2, and treat TGO CFO verification as the de-facto proof of your carbon numbers.
Your sector sets the bar
Because exposure is sector-driven, two companies disclosing the same thing can score very differently. Here is what the score actually turns on, by SET industry group.
The principle is simple: exposure sets the bar. A transport firm disclosing only Scope 1 & 2 scores badly; a professional-services firm doing the same can score well. We calibrate every engagement to your sector's material metrics — not a generic checklist.
The gaps that cost points
Thai reports rarely fail on ambition. They lose the score they already earned to a handful of recurring, entirely fixable disclosure gaps.
- 01Scope 3 barely tracked. Only around 18% of Thai firms disclose Scope 3 — the category that dominates the footprint for finance, retail, autos and food.
- 02Targets without pathways. A net-zero headline with no interim milestones, no base year and no decarbonisation levers reads as aspiration, not plan.
- 03Thin scenario analysis. TCFD / IFRS S2 strategy sections that assert resilience without a quantified scenario.
- 04Governance asserted, not evidenced. "The board oversees climate" — with no mandate, cadence or decision shown.
- 05No assurance. Unverified numbers score below the same numbers with limited assurance or TGO CFO verification.
- 06Lost in translation. A strong Thai report rendered into weak English quietly forfeits points with the London-based rater reading the English version.
The Othello Readiness Pathway
One accountable route from an indicative gap read to a filed, bilingual, assurance-ready report — every stage tool-assisted by the ESG Disclosure Studio.
Diagnose
An indicative FTSE-style Report Card scores your existing disclosure and ranks the highest-yield fixes.
Materiality
Double-materiality assessment calibrated to your SET sector's exposure and metrics.
Disclose & build
We build or uplift the disclosure — climate, GHG, governance, targets — to IFRS S2 and FTSE standards.
Bilingual publication
Full ISO 17100 EN↔TH rendering with disclosure-grade QA — the report reads natively to raters and regulators alike.
Assurance-ready
Filing-readiness sign-off and evidence pack; we liaise with your independent assurer.
The service framework
Productised, not bespoke-every-time. Point at what you need — a diagnostic, a full disclosure build, carbon numbers, a framework response, a training cohort, or the language layer that ties it all together.
- Indicative FTSE score, 3 pillars / 14 themes
- Sector-weighted gap checklist
- Prioritised, costed fixes
- Double-materiality assessment
- IFRS S2 / TCFD climate build
- GHG review · ratings strategy
- TPI climate uplift · PCAF for FIs
- Scenario analysis · assurance readiness
- Board & investor briefings
Carbon Footprint & GHG
The most common entry purchase — Scope 1 & 2 for 56-1 and IFRS S2, plus the TGO label.
Framework Programs
Satisfy the specific framework a rater or investor asks for.
Othello ESG Academy
Build internal capability — bilingual, disclosure-connected, taught by the people who build the reports.
Disclosure Linguistics
Practice II. Sustainability reporting is where a mistranslated target or an over-claimed verb costs rating points. This is the bilingual QA layer no generic translation vendor runs.
- Full ISO 17100 translate–edit–proofread
- Capital-markets & legal documents
- Format-preserving delivery
- Managed ESG termbase & consistency
- MQM scoring · meaning-drift check
- Greenwashing & figure-consistency QA
- Dedicated bench + named PM
- Locked termbase across all documents
- 1-hour quote SLA
The ESG Disclosure Studio
Every engagement runs on our own bilingual disclosure platform — the reason we can hand you a scored, evidenced gap analysis on day one, not week three.
It is what turns a translation vendor into a ratings partner — and a consultancy into one that can prove its numbers in both languages.
Why Othello
Most firms buy the disclosure from a consultancy and the translation from a language vendor — then discover the English version quietly undoes the advisory work. We are the one firm that does both, under one NDA and one termbase.
Tightening a climate report for the FTSE-era reader
A SET50-listed financial group had a strong climate report — drafted in Thai, then translated to English for investors and raters. Othello ran the English editorial and disclosure-language review: an ISO 17100 pass that reconciled terminology, tightened over-reaching claims, and aligned the wording to what FTSE Russell and IFRS S2 assessors actually read — before the report went public.
Client anonymised. Named reference available on request.
See where your disclosure stands before the market does.
Send us your latest report or a short brief. We'll return an indicative FTSE gap read and a fixed quote — within the hour, under NDA.