Independent Limited Assurance Report

on the Clariant’s 2021 Non-Financial Reporting to the Board of Directors of Clariant AG, Muttenz

We have been engaged to perform assurance procedures to provide limited assurance on the non-financial performance reporting of Clariant AG and its consolidated subsidiaries (“Clariant”) for the year ended 31 December 2021.

Scope and subject matter

Our limited assurance engagement focused on selected 2021 non-financial performance indicators disclosed in the “Review on Performance, People and Planet” section of the Integrated Report 2021 of Clariant as published on Clariant’s website https://reports.clariant.com/2021/review-on-performance-people-and-planet as summarized in the GRI content index section and disclosed in the respective text boxes marked with PwC CH.

Criteria

The reporting criteria used by Clariant are described and summarized in the respective chapter in the “Review on Performance, People and Planet” section of the Integrated Report 2021 of Clariant. The procedures applied by Clariant are based on the GRI Sustainability Reporting Standards (GRI Standards) by which the non-financial performance indicators are internally gathered, collated and aggregated.

Inherent limitations

The accuracy and completeness of non-financial performance indicators are subject to inherent limitations given their nature and methods for determining, calculating and estimating such data. Our assurance report should therefore be read in connection with the reporting criteria. Further, the greenhouse gas quantification is subject to inherent uncertainty because of incomplete scientific knowledge used to determine emissions factors and the values needed to combine emissions of different gases.

Clariant responsibility

The Board of Directors of Clariant AG is responsible for both the subject matter and the criteria as well as for selection, preparation and presentation of the information in accordance with the criteria. This responsibility includes the design, implementation and maintenance of related internal control relevant to this reporting process that is free from material misstatement, whether due to fraud or error.

Our independence and quality controls

We are independent of Clariant in accordance with the International Code of EthicsCode of EthicsThe Code of Ethics is laying down Clariant’s commitments and is intended to be a guide with ethical principles and examples to enable all personnel and associated parties to act with the highest standards of integrity.View entire glossary for Professional Accountants (including International Independence Standards) issued by the International Ethics Standards Board for Accountants (IESBA Code) that are relevant to our audit of the financial statements and other assurance engagements in Switzerland. We have fulfilled our other ethical responsibilities in accordance with the IESBA Code.

Our firm applies International Standard on Quality Control 1 and accordingly maintains a comprehensive system of quality control including documented policies and procedures regarding compliance with ethical requirements, professional standards and applicable legal and regulatory requirements.

Our responsibility

Our responsibility is to express a limited assurance conclusion on the non-financial performance indicators disclosed in the “Review on Performance, People and Planet” section of the Integrated Report 2021 as published on Clariant’s website https://reports.clariant.com/2021/review-on-performance-people-and-planet and marked with PwC CH. We conducted our limited assurance engagement in accordance with the International Standard on Assurance Engagements 3000 (revised), “Assurance Engagements other than Audits or Reviews of Historical Financial Information”, and, in respect of greenhouse gas emissions, with the International Standard on Assurance Engagements 3410, “Assurance Engagements on Greenhouse Gas Statements”, issued by the International Auditing and Assurance Standards Board. These standards require that we plan and perform this engagement to obtain limited assurance about whether the non-financial performance indicators were prepared, in all material aspects, in accordance with the reporting criteria.

A limited assurance engagement undertaken in accordance with ISAE 3000 (revised) and ISAE 3410 involves assessing the suitability in the circumstances of Clariant’s use of applicable criteria as the basis for the preparation of the non-financial performance indicators, assessing the risks of material misstatement of the non-financial performance indicators whether due to fraud or error, responding to the assessed risks as necessary in the circumstances, and evaluating the overall presentation of the non-financial performance indicators. A limited assurance engagement is substantially less in scope than a reasonable assurance engagement in relation to both the risk assessment procedures, including an understanding of internal control, and the procedures performed in response to the assessed risks. The procedures selected depend on the assurance practitioner’s judgement.

Summary of the work performed

• Reviewing the application of Clariant’s internal guidelines
• Interviewing Clariant representatives at Group level responsible for the data collection and reporting
• Interviewing Clariant representatives in Indonesia, Mexico and South Africa responsible for the data collection and reporting
• Performing tests on a sample basis of evidence supporting the non-financial performance indicators as outlined in the scope and subject matter section concerning completeness, accuracy, adequacy and consistency
• Inspecting the relevant documentation on a sample basis
• Reviewing and assessing the management reporting processes for non-financial performance reporting and consolidation and their related controls

We have not carried out any work on data other than outlined in the scope and subject matter section as defined above. We believe that the evidence we have obtained is sufficient and appropriate to provide a basis for our assurance conclusions.

Conclusion

Based on the procedures we performed, nothing has come to our attention that causes us to believe that the 2021 non-financial performance indicators disclosed in the “Review on Performance, People and Planet” section of the Integrated Report 2021 as published on Clariant’s website https://reports.clariant.com/2021/review-on-performance-people-and-planet and marked with PwC CH are not prepared and disclosed in all material respects in accordance with the reporting criteria.

Intended users and purpose of the report

Our report is prepared for, and only for, the Board of Directors of Clariant AG, and solely for the purpose of reporting to them on the 2021 non-financial performance indicators in the “Review on Performance, People, and PlanetPerformance, People, and PlanetComprises a discussion of Clariant’s material topics previously provided in the Multicapital Review.View entire glossary ” section of the Integrated Report 2021 and no other purpose. We do not, in giving our conclusion, accept or assume responsibility (legal or otherwise) or accept liability for, or in connection with, any other purpose for which our report including the conclusion might be used, or to any other person to whom our report will be shown or into whose hands it might come, and no other persons shall be entitled to rely on our conclusion.

We permit the disclosure of our report, in full only and in combination with the published “Review on Performance, People, and PlanetPerformance, People, and PlanetComprises a discussion of Clariant’s material topics previously provided in the Multicapital Review.View entire glossary ” section of the Integrated Report 2021 to enable the Board of Directors to demonstrate that they have discharged their governance responsibilities by commissioning an independent assurance report over the 2021 non-financial performance indicators in the “Review on Performance, People, and PlanetPerformance, People, and PlanetComprises a discussion of Clariant’s material topics previously provided in the Multicapital Review.View entire glossary ” section of the Integrated Report 2021 without assuming or accepting any responsibility or liability to any third parties on our part.

To the fullest extent permitted by law, we will not accept or assume responsibility to anyone other than the Board of Directors of Clariant AG for our work or this report.

PricewaterhouseCoopers AG

Basel, 1 June 2022

The maintenance and integrity of the Clariant AG website is the responsibility of the Board of Directors; the work carried out by the assurance providers does not involve consideration of the maintenance and integrity of the Clariant AG website and, accordingly, the assurance providers accept no responsibility for any changes that may have occurred to the reported non-financial performance indicators or criteria since they were initially presented on the website.