Introduction

The Global Reporting Initiative (GRI) has published the first sustainability reporting standards since 1997, regularly revised. The current version (GRI Standards 2021, with subsequent thematic updates) structures the framework into three levels: universal standards that apply to all organisations, sector standards published progressively for certain sectors, and thematic standards covering economic, environmental and social topics.

For an infrastructure operator, the use of GRI Standards responds to several possible motivations: meeting the demands of institutional investors, positioning in a competitive market where competitors already publish, anticipating emerging regulatory obligations (particularly the European CSRD which partly relies on GRI logic), structuring its own ESG performance approach.

This article presents the architecture of the GRI Standards, the materiality assessment method, specific adaptations for an infrastructure operator, articulation with other reporting frameworks (TCFD, EU Taxonomy, CSRD), and common errors in first publications.

The architecture of the GRI Standards

The GRI Standards 2021 are organised into three categories.

The universal standards (GRI 1, 2, 3) lay the common foundations for all GRI publications. GRI 1 presents the fundamentals and reporting principles. GRI 2 covers general information on the organisation: profile, governance, strategy, stakeholders. GRI 3 formalises the materiality assessment process, a crucial step that determines the topics on which the organisation actually reports.

The sector standards are published progressively by GRI for specific sectors. A GRI Sector Standard exists for oil and gas (GRI 11), coal (GRI 12), agriculture and aquaculture (GRI 13), metals and mining forthcoming, etc. For sectors without a published sector standard, the organisation relies on the universal standards and thematic standards.

The thematic standards (200, 300, 400 series) cover economic topics (economic performance, corruption, competition, tax), environmental topics (materials, energy, water, biodiversity, emissions, waste, environmental compliance) and social topics (employment, labour relations, health and safety, training, diversity, non-discrimination, human rights, local communities, supply chain).

Each thematic standard includes a description of the topic, reporting requirements on the management approach, and quantitative and qualitative indicators to report.

The organisation publishing according to the GRI Standards can choose two levels of compliance: "Reporting in accordance with the GRI Standards" (full compliance, with coverage of all identified material topics) or "Reporting with reference to the GRI Standards" (selective use, without claiming full compliance).

Materiality assessment

Materiality assessment is the most structuring methodological step in the GRI process. It determines the topics on which the organisation reports, by combining two dimensions.

Impact materiality. Which topics does the organisation's activity significantly affect, both positively and negatively, on the economy, the environment and society? This dimension examines what the organisation does to the world.

Financial materiality. Which topics significantly affect the organisation's capacity to create or preserve economic value in the short, medium and long term? This dimension examines the risks and opportunities for the organisation itself.

In the GRI 2021 logic, impact materiality comes first, as the trigger for reporting. Financial materiality is a complementary consideration, particularly highlighted in regulated frameworks such as the European CSRD, which speaks of double materiality.

The assessment draws on several sources: interviews with internal and external stakeholders, value chain analysis, review of sectoral practices, analysis of regulatory trends. The result is a materiality matrix that positions topics according to their importance and guides the scope of reporting.

For an infrastructure operator, typical material topics include: direct and indirect GHG emissions, water consumption, hazardous waste management, worker health and safety, land acquisition and resettlement, community relations, supply chain, business ethics, diversity and inclusion.

Specific adaptations for an infrastructure operator

An infrastructure operator adopting the GRI Standards must address several sector-specific aspects that the universal framework does not immediately cover.

The reporting scope. Does an infrastructure operator publish a consolidated report at company level, or reports by project? Both approaches coexist. The consolidated report presents a portfolio view, useful for investors and strategic partners. The project-level report is more granular, useful for local stakeholders and specific lenders. Some organisations publish both at different frequencies.

The construction / operation distinction. E&S issues differ significantly between the construction phase (intense but time-limited) and the operation phase (less intense but spread over decades). Reporting must render this distinction legible, which escapes homogeneous treatment.

Articulation with ESMPs and ESAPs. Commitments made under DFI financing produce indicators that naturally feed GRI reporting. Articulation avoids duplication of work and ensures consistency between different reporting streams. It requires coordination between the operational E&S directorate and the CSR directorate that often carries external reporting.

The supply chain. Heavy materials (cement, steel) represent a major share of impacts. Reporting must seriously address the upstream chain, which requires specific data collection work from suppliers, sometimes difficult in markets where information is not systematically published.

Articulation with other frameworks

The GRI Standards coexist with other reporting frameworks that the organisation can mobilise simultaneously.

The TCFD (Task Force on Climate-related Financial Disclosures) offers a specific framework for climate reporting, structured around four pillars: governance, strategy, risk management, metrics and targets. The GRI Standards integrate part of the TCFD expectations via climate thematic standards, but a separate TCFD report may be appropriate for organisations with high climate exposure.

The EU Taxonomy imposes on eligible companies reporting of the green share of their activities. This reporting, complementary rather than substitutive to GRI reporting, uses its own categories and criteria.

The European CSRD (Corporate Sustainability Reporting Directive), progressively implemented from 2024, requires large European companies to report according to the European Sustainability Reporting Standards (ESRS). The ESRS rely heavily on GRI logic, which facilitates articulation for companies already engaged in GRI reporting.

The SASB standards (Sustainability Accounting Standards Board), now integrated into the IFRS Foundation, offer sector standards more oriented towards investors. They coexist with the GRI Standards and can be mobilised in complement.

For an infrastructure operator, the pragmatic strategy is to structure GRI reporting as the backbone, and to articulate other frameworks around it: targeted extraction for TCFD, additional calculation for the Taxonomy, extension for CSRD if the company is eligible.

Common errors in first publications

Five errors recur in the first GRI reports of infrastructure operators.

Over-extension. Some reports attempt to cover all thematic standards, without prioritisation. The result is an encyclopaedic document that is little read and not actionable. Materiality is the tool that enables focus on what truly matters.

Superficial data. Reporting that a company "commits" to a topic without presenting quantified indicators, targets, or historical data does not meet GRI expectations. Each material topic must be addressed with sufficient depth for an external reader to assess performance.

Disconnection from operations. The reporting is produced by a CSR team that draws on its own sources, without articulation with operational teams. The result is a report that may present figures diverging from those circulating internally, undermining credibility.

Absence of comparative historical data. The first report cannot present historical data, this is normal. Subsequent reports must include previous indicators and present trends. The absence of this comparison reflects discontinuity that harms legibility.

Communication through form. Some organisations invest heavily in report graphics (photographs, infographics, testimonials) at the expense of substantial content. A GRI report is not an institutional communication document. Its value lies in the rigour of the information provided.

What stakeholders seek in GRI reporting.

  • Data credibility: sources, scope, calculation method, possible third-party review.
  • Temporal consistency: evolution of indicators over several years, legible trends.
  • Transparency on difficulties: non-compliances, deviations from targets, corrective actions.
  • Worked materiality: evolution of the materiality matrix over the years, genuine listening to stakeholders.
  • Articulation with other reporting: consistency between GRI, TCFD, Taxonomy, CSRD as applicable.

Conclusion

GRI reporting for an infrastructure operator is not a communication exercise. It is an internal discipline exercise that forces the organisation to systematically examine its performance on dozens of material indicators, present it publicly, and commit to improvement trajectories.

When well conducted, this exercise produces tangible returns: improved internal performance through the mirror effect, enhanced credibility with investors and partners, anticipation of emerging regulatory obligations. When poorly conducted, it produces a report read by few, which does not carry weight against the reporting of more mature competitors.

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