2026 ESG Data Usage Report

A groundbreaking study carried out by the WeeFin team to provide a better understanding of the actual use and origin of ESG data.

For financial institutions committed to sustainable finance, ESG data is a strategic asset in its own right. It lies at the core of investment decisions, regulatory reporting obligations and commitments made to clients and stakeholders. Its quality, traceability and coverage directly determine the resilience of the strategies deployed. Yet one fundamental question remained without a clearly documented answer: where does the ESG data used by financial institutions actually come from? And how is it actually utilised on a day-to-day basis?

It is to answer these questions that the WeeFin team is publishing the first Observatory on the use of ESG data. 

Download the Observatory free of charge by filling in the form opposite.

What you will find in this Observatory:

The Report is based on an analysis of the actual use of data by financial institutions (asset managers, institutional investors, insurers and banks representing €6,900 billion in assets) using the WeeFin platform, covering 47 distinct data providers and over 24,000 raw indicators.

Key findings:

1. Market structure. What is the actual breakdown of ESG data used between US and European providers and public sources?
2. Presence vs usage. Why being connected to a provider does not mean using it, and what this reveals about the depth of usage within the European ecosystem
3. Observed preference. What institutions actually choose when given the choice between a US provider and a European provider or a public data source.
4. Analysis by use case. Regulation, climate, biodiversity, social issues, ESG scores: which data sources dominate across different themes?