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ESG Ratings and Their Disagreements

Sector-Specific ESG Ratings: Why Industry Context Changes Everything

Pomegra Learn

Why Does Industry Sector Change What ESG Factors Matter?

ESG analysis is not a one-size-fits-all exercise. A pharmaceutical company's most material ESG issue is often drug pricing and access to medicines, not carbon emissions. An oil and gas company's most material ESG issue is exactly the opposite — climate transition risk and emissions, not drug pricing. A bank's most material ESG issue is governance quality and risk management, not either. Sector-specific ESG analysis recognizes that different industries create different ESG exposures, and that applying a generic ESG framework equally to all sectors produces ratings that fail to capture the most financially relevant ESG risks in each industry.

Quick definition: Sector-specific ESG ratings adjust the factors assessed and their relative weights based on the industry characteristics of each company — giving greater weight to the ESG dimensions most likely to affect financial value in each sector, and assessing factors specific to each industry's particular ESG risk profile.

Key takeaways​

  • SASB's materiality standards, covering 77 industries across 11 sectors, are the most widely adopted framework for identifying which ESG factors are financially material by industry.
  • The financially material ESG issues differ dramatically across sectors: climate transition risk dominates energy; data privacy dominates technology; drug pricing and access dominates pharmaceuticals; labor practices dominate retail and consumer goods.
  • Sector-neutral ESG ratings (applying the same weight to E, S, and G regardless of industry) produce systematically biased comparisons — rating technology companies higher because of their low direct carbon footprint rather than their governance and social quality.
  • Within-sector ESG ranking (comparing a company only to its industry peers) is more analytically useful than cross-sector ranking for most investment decisions.
  • Investors should understand the sector weighting approach of their primary ESG data provider and verify that it aligns with their understanding of financial materiality in their investment universe.

SASB's Industry-Specific Materiality Map​

The Sustainability Accounting Standards Board (SASB), whose standards are now maintained by the IFRS Foundation, developed industry-specific sustainability accounting standards for 77 industries organized into 11 sectors. Each SASB standard identifies the ESG disclosure topics most likely to be financially material for companies in that industry, based on evidence-based materiality assessment.

SASB's 11 sector groupings:

  1. Consumer Goods
  2. Extractives & Minerals Processing
  3. Financials
  4. Food & Beverage
  5. Health Care
  6. Infrastructure
  7. Renewable Resources & Alternative Energy
  8. Resource Transformation
  9. Services
  10. Technology & Communications
  11. Transportation

For each industry within these sectors, SASB identifies typically 5–10 disclosure topics from a universe of 26 general issue categories, plus industry-specific metrics for each topic. The result is a detailed, evidence-based specification of what matters most for ESG financial analysis in each industry.

Key ESG Issues by Major Sector​

Energy — Oil and Gas:

  • GHG emissions (scope 1, 2, and 3 from combustion of sold products)
  • Air quality and methane emissions
  • Water management at operations
  • Workforce health and safety
  • Business ethics and critical incident risk management
  • Climate transition strategy and stranded asset risk Not primary: Human capital development, data privacy

Technology — Software and IT Services:

  • Data privacy and freedom of expression
  • Data security and cybersecurity
  • Employee diversity and inclusion
  • Competitive behavior and antitrust
  • Managing systemic risks from technology disruptions Not primary: Direct carbon emissions (low for software), water management

Healthcare — Pharmaceuticals:

  • Drug safety and side effects
  • Pricing and access to medicines
  • Marketing practices
  • Supply chain management
  • Drug affordability in developing markets Not primary: Direct energy and water use (relatively low)

Financials — Commercial Banks:

  • Financial inclusion and capacity building
  • Customer privacy
  • Data security
  • Business ethics and fraud prevention
  • Systemic risk management
  • ESG integration in credit analysis and lending Not primary: Direct environmental footprint (minimal)

Consumer Goods — Apparel:

  • Supply chain labor standards
  • Raw materials sourcing (environmental impact of cotton, synthetic fibers)
  • Waste and hazardous materials
  • Chemical management
  • Water use in manufacturing Not primary: Governance board independence (less material than supply chain)

SASB materiality by sector​

The Sector-Neutral Problem​

Applying the same ESG factor weights to all companies regardless of sector creates systematic rating biases:

Technology sector inflation: Technology companies (software, internet) have very low direct carbon footprints, manageable water use, and typically strong governance structures (independent boards, institutional ownership). In a framework that weights environmental factors equally across all sectors, technology companies score artificially high on E not because they are environmental leaders but because their business model creates little direct environmental exposure. An oil company with exceptional emissions management still faces more environmental exposure than a software company with mediocre environmental policies.

Energy sector penalization: Energy sector companies that are ESG leaders in their industry — exceptional methane management, best-in-class safety record, credible transition strategy — may still score below the overall universe median in a sector-neutral framework because the energy sector's inherent environmental profile creates high E scores regardless of management quality.

The "best oil company" problem: The philosophical debate about whether having the "best" ESG scores in a high-impact sector constitutes genuine ESG quality is partly a sector-neutrality debate. Best-in-class within-sector ESG approaches accept that relative ESG performance within sectors is meaningful; sector-exclusion approaches reject this and require absolute standards regardless of sector.

Sector Rotation and ESG Rating Implications​

As sector weights in equity indices change over time, the aggregate ESG quality of an ESG-screened portfolio will change even if no ESG criteria change — because different sectors have different average ESG scores. A period when energy sector weight in the market increases (as happened in 2021–2022) will reduce the average ESG score of a broad ESG portfolio simply due to composition effects.

This dynamic is important for investors who report portfolio ESG quality metrics: changes in reported portfolio ESG scores may reflect market sector rotation rather than changes in underlying company ESG performance.

Real-world examples​

Banking sector governance emphasis: US and European bank ESG ratings have historically emphasized governance quality — board risk oversight, risk culture, compensation design — as the primary ESG dimension for banks. ESG profiles of Wells Fargo and JPMorgan Chase, for example, are primarily driven by governance quality assessments, with environmental factors (their lending portfolios' climate impact) emerging as increasingly important but secondary. Banks with strong governance scores can receive good overall ESG ratings even with significant fossil fuel financing exposure, depending on how providers weight the E pillar.

Pharmaceutical pricing as social ESG factor: Insulin pricing practices in the US pharmaceutical sector became a major ESG controversy from 2019 onward, with multiple insulin manufacturers facing significant social score downgrades from ESG providers that include drug pricing in their social assessments. Providers that do not include pricing access as an ESG factor rated the same companies more favorably — a direct consequence of scope divergence in the healthcare sector.

Fast fashion and supply chain social scores: Apparel sector ESG ratings are heavily influenced by supply chain labor assessments. Companies with audited, certified supply chains score better on social metrics; companies with documented violations (multiple Bangladesh, Cambodia, or Vietnam factory investigations) score worse. The apparel sector exemplifies how a company's most material ESG risk is far removed from its corporate headquarters and requires supply chain-specific assessment.

Common mistakes​

Using aggregate ESG scores to compare companies across sectors: Comparing a technology company's aggregate ESG score to an energy company's aggregate ESG score using a sector-neutral framework does not tell you which company manages its ESG risks better — it mainly tells you which sector has lower inherent ESG exposure.

Ignoring the "shadow" ESG factors in sector analysis: Some sectors have significant ESG impacts that are not captured in standard frameworks. Financial sector ESG analysis that focuses on internal governance and direct environmental footprint without assessing the ESG profile of loan portfolios and investment portfolios is missing the most significant ESG dimension for large banks.

Applying SASB materiality as a complete ESG framework: SASB's financially material issues are starting points for investment-relevant ESG analysis, not comprehensive ESG assessment. Companies with strong SASB-material factor scores may still have significant impact-material ESG issues that SASB's financial-materiality framework does not capture.

FAQ​

How do ESG rating agencies implement sector-specific weighting in practice?​

The implementation varies by provider. MSCI assigns different key issue weights by industry, using an explicit materiality framework that gives higher weight to issues assessed as financially material for each industry. Sustainalytics' exposure model implicitly weights sectors by their inherent risk levels. S&P's CSA uses industry-specific questionnaires with different criteria and weights for each sector. The general principle is consistent across providers; the specific implementation differs.

Is a higher within-sector ESG score always better?​

For companies that investors cannot exclude from their universe (in a full-sector index strategy), a higher within-sector ESG score is typically better. For exclusion decisions, within-sector ranking tells you who is the "best of the worst" in a challenged sector — which may or may not be sufficient for inclusion depending on investor values.

How does the SDG mapping relate to sector-specific ESG?​

Some ESG frameworks map sector activities to the UN Sustainable Development Goals — identifying which SDGs are positively or negatively affected by each sector. This SDG mapping provides a different perspective on sector ESG significance than SASB financial materiality: it focuses on positive and negative contributions to societal objectives rather than financial risk. The two frameworks are complementary.

What ESG factors are material for real estate?​

GRESB (Global Real Estate Sustainability Benchmark) is the primary sector-specific ESG framework for real estate, covering energy use (EUI), greenhouse gas emissions intensity, water consumption, waste management, and building certification (LEED, BREEAM, EPC). Governance factors (board oversight, data management) are secondary to building-level environmental performance for most real estate ESG analysis.

Are there sector-specific ESG data providers?​

Yes — several specialized providers focus on specific sectors: S-Network Global Indexes for timber and agriculture, ClimateWise for insurance climate risk, GRESB for real estate and infrastructure, and FAIRR (Farm Animal Investment Risk and Return) for food and agriculture. These specialized providers offer depth in specific sector ESG dimensions that general-purpose providers may not cover as thoroughly.

Summary​

Sector-specific ESG ratings recognize that different industries create different ESG exposures and require different factor weighting to produce financially relevant assessments. SASB's industry-specific materiality standards are the most widely adopted framework for identifying which ESG factors are financially material by sector. Applying sector-neutral ESG weights inflates scores for low-direct-impact sectors (technology) and penalizes sectors with inherent high exposure (energy) regardless of management quality. Within-sector ESG ranking is more analytically useful than cross-sector comparison for investment decisions within sector-constrained mandates. Investors should understand and validate the sector weighting approach of their primary ESG data providers to ensure alignment with their understanding of where ESG risk is concentrated in their investment universe.

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