MSCI ESG Ratings Explained: How They Work, What Drives Your Score, and How to Improve It
A complete guide to MSCI ESG ratings for corporate sustainability teams. Learn how the AAA-CCC methodology works, what drives your score, and 5 practic

Holcim is a global leader in sustainable building solutions, operating in 48 countries. With a strong focus on decarbonization and circular construction, Holcim aims to build progress for people and the planet. The company is recognized as a CDP A List organization for climate and water leadership and is one of the first in its industry to fully integrate sustainability into its financial and strategic reporting. This integration includes the disclosure of non financial information, which is increasingly important for meeting regulatory requirements and stakeholder expectations. The introduction of the Corporate Sustainability Reporting Directive (CSRD) by the European Parliament has further strengthened Holcim’s focus on transparent and comprehensive ESG reporting. As a large company subject to these new reporting requirements, Holcim welcomes the opportunity to disclose information that demonstrates its leadership in sustainability and provides stakeholders with the data they need to make informed decisions.
Who is Nossa Data
Nossa Data is a female-founded ESG technology company that empowers corporations to streamline and enhance their ESG disclosures across global frameworks, regulations and standards such as the CSRD, ISSB standards, CDP, Ecovadis, SASB, MSCI, WDI and more. Modern companies are leveraging advanced ESG technology platforms like Nossa Data to streamline and enhance their sustainability reporting. Nossa Data centralises the collection of quantitative and qualitative data by combining smart automation with expert ESG guidance, Nossa Data helps organisations move from compliance to leadership in sustainability disclosure.
As a multinational company with thousands of sites globally, Holcim must comply with various reporting frameworks, including those for CSR reporting, to meet the requirements of different jurisdictions and stakeholders.
Their key challenges included:
Holcim’s sustainability reporting involves numerous internal contributors and external reviewers, requiring a robust system for data workflow, validation, and sign-off. Large companies like Holcim face more complex ESG disclosure obligations than smaller companies, which may lack the resources for comprehensive ESG reporting. Companies must manage risks and opportunities arising from their environmental impacts, supply chain, and economic activities. Holcim's ESG reporting must address their performance in areas such as social responsibility, corporate governance, and environmentally sustainable practices.
“The Nossa Data platform has been an extremely valuable tool for our CDP and WDI submissions. It is well-organized, easy to navigate, and highly effective for project management. By streamlining our workflows and cutting down manual project coordination, the platform significantly improved our reporting efficiency. This saved us valuable time, which we could spend reviewing and optimizing our submission quality. With Nossa Data’s excellent support and advanced technology, Holcim successfully reached CDP's 'A List' for both Climate Change and Water Security.” - Steven Murphey, ESG Engagement Manager
Holcim adopted Nossa Data’s ESG disclosure platform to streamline their CDP and WDI reporting. Nossa Data also supports Holcim’s ESG strategy and ESG initiatives by centralizing ESG data, automating reporting, and helping the company align with regulatory requirements and sustainability goals.
Using Nossa Data, Holcim was able to:
Nossa Data enables Holcim to engage stakeholders more effectively by providing transparent and accessible ESG data across the organization and its supply chains.
By using Nossa Data, Holcim brought together stakeholders from sustainability, finance, operations, and procurement, enabling faster and more accurate responses to CDP’s detailed questionnaires while maintaining consistency with other ESG disclosures like WDI and TCFD.
With Nossa Data, Holcim achieved:
Enhanced ESG transparency and integrated reporting can contribute to better financial performance and overall company performance by building stakeholder trust and supporting informed decision-making. Recent studies show that more than half of investors and stakeholders value transparency and ESG alignment when evaluating companies, highlighting the importance of non-financial disclosures for financial performance and value creation.
Holcim’s sustainability leadership is reflected in their 2025 Integrated Annual Report, which integrates financial and non-financial reporting, showcasing the company’s end-to-end decarbonization efforts and alignment with science-based targets. Holcim's integrated reporting approach provides a comprehensive view of the company's performance, including both financial and non-financial aspects.