ISS ESG - Carbon & Climate Data

Data category

Environmental data

Brief description of the data offering

ISS ESG provides carbon and climate data on a universe of more than 28,500 issuers across asset classes. ISS ESG's comprehensive data base of GHG emissions include both reported emissions data and modelled estimations for non-disclosed emissions, or those who report with a low trust metric (according to internal analysis). ISS ESG utilizes a sophisticated, proprietary approximation system to estimate emissions, which includes over 800 climate-relevant sector and subsector-specific models. The modelling system was developed over the course of three years in partnership with the Swiss Federal Institute of Technology (ETH Zurich).

Available data factors include direct emissions (scope 1), energy indirect emissions (scope 2), and other indirect (scope 3), including both upstream (supply chain) and product usage (life cycle) emissions. Emissions intensity data is also available identifying an issuer's total (scope 1 and 2), scope 1, and scope 2 carbon emissions intensity. Additional data factors include short-term and long-term physical risk, science-based climate or emissions targets, potential avoided emissions, data source, and trust metric.

Carbon footprint data is available for the following asset classes: listed entities, fixed income, private equity, most sovereign, municipal, sub-/supranational issuers, private equity and debt issuers, corporate loans, and project finance including listed and unlisted infrastructure, real estate and real assets.

Where and how do you source your data?

For scope 1 and 2 carbon emissions, ISS ESG collects self-reported greenhouse gas emissions data from publicly available sources, including corporate social responsibility reports, CDP, investor relations communications, websites and others. This data is assigned with a trust metric to indicate the quality of self-reported data. 

For non-reporting companies, or those who report with a low trust metric, ISS ESG uses in-house emissions modelling methodology, allowing ISS ESG to calculate GHG emissions of companies based on those criteria most relevant to their line of business.

For scope 3 emissions data, ISS ESG uses in-house modelling system, which conceptually differentiates between emissions from upstream/downstream supply chains and emissions from the “use phase” of a company’s product or service. 

Who are the data users?

Data is used by a broad range of institutional investors, asset managers, asset owners, fund managers, banks, government institutions, universities and research firms. 

What is the cost for your data offering?

Pricing is based on the method by which data is delivered. ISS ESG can provide data via its proprietary platform, DataDesk, or via data feed. Pricing for this solution is available upon request.

What are the key attributes that differentiates the data you offer?

  • A unique and sophisticated emissions modelling system
    ISS ESG utilizes a sophisticated approximation system to estimate emissions, including over 800 climate-relevant sector and subsector-specific models, allowing ISS ESG to calculate the GHG emissions of companies based on those criteria that are most relevant to their line of business.
  • Comprehensive Coverage
    ISS ESG’s data base of GHG emissions contains more than 28,500 issuers across a range of asset classes including listed companies and issuers of corporate debt.
  • Data Quality and Transparency
    ISS ESG’s granular emissions modelling system was developed over three years with scientists from ETH Zurich. ISS ESG is committed to applying the highest standards of greenhouse gas accounting capabilities with unmatched breadth and depth of investments coverage, verification and approximation. Additionally, ISS ESG helps to ensure transparency by including a trust and quality rating for every data point.
  • Experience
    ISS ESG has worked with financial market participants and governments to screen trillions of dollars in assets under management for their climate impact. ISS ESG partners with a wide range of other specialists on a non-exclusive base to complement our research and service with premier market offerings.
  • Expertise
    ISS ESG’s dedicated team of climate specialists are industry leaders on climate change issues. Members of the team have partnered in the 2° Investing Initiative, served as resources at various workgroups on financed emissions including the United Nations Environment Programme Finance Initiative, assisted in the development of ISO standards, and contributed to the works of the Task Force on Climate-related Financial Disclosure (TCFD).


Understand, measure and act on climate-related risks and their impact on your investments across all asset classes using @ISSESG’s extensive #carbon and #climate data and advisory, covering 28,500+ listed companies and issuers of corporate debt.


Corporate Statements

Turning knowledge into action

Maximilian Horster, head of ISS ESG, foresees several trends will shape the environmental, social and governance (ESG) investment space over the next 12 months. Environmental Finance spoke with him to see how ISS ESG is tailoring its data, index and reporting solutions as a result

Guide entries

Bespoke Research & Advisory Solutions

Carbon & Climate Data

Carbon Footprint Report

Carbon Risk Rating

Climate Advisory Services

Climate Impact Report

Climate Voting Policy


Controversial Weapons Research

Country Controversy Assessment

Custom Climate Voting Factors

Custom Rating

Director and Board Data

Energy & Extractives Screening

Environmental & Social Disclosure QualityScore

ESG Corporate Rating

ESG Country Rating

ESG Fund Rating

ESG Index Solutions

ESG Portfolio Analysis

ESG Raw Data

ESG Scorecard

EU Taxonomy Alignment Solution


Executive Compensation Data & Profiles

Global Sanctions Screening

Governance QualityScore

Norm-Based Research

Pooled Engagement

Potential Avoided Emissions Data

Responsible Investment Policy Development

SDG Impact Rating

SDG Solutions Assessment

Second Party Opinion

Sector-Based Screening

SFDR Principle Adverse Impacts Solution

Shareholder Meeting Results

Stewardship Toolkit