Euronext - 2020 Universal Registration Document

Other Information 9 Assurance Report of the Independent Auditor

9.3 Assurance Report of the Independent Auditor

To: the shareholders and Supervisory Board of Euronext N.V.

OUR CONCLUSION We have performed a limited assurance engagement on selected non-financial key performance indicators (hereafter: selected non- financial KPIs) in the Universal Registration Document for the year 2020 of Euronext N.V. based in Amsterdam.

Based on our procedures performed and the evidence obtained, nothing has come to our attention that causes us to believe that the selected non-financial KPIs are not prepared, in all material respects, in accordance with the reporting criteria as included in chapter 3.7 “Summary ESG KPI” of the Universal Registration Document.

The selected non-financial KPIs are included in chapter 3.7 (Summary ESG PKI) and consist of:

Impact areas

KPIs

1. Number of serious incidents on the regulated markets reported to the College of Regulators 2. Number of operational alerts treated by EMS 3. Availability time of the system Optiq (99.99%) 4. Percentage of suppliers signing the code of conduct (June 2020 to December 2020) 5. NPS

Our markets

Our partners

Our people

6. Percentage of women in the Senior Leadership Team

7. Use of the Whistleblower mechanism 8. Data Protection training by new joiners to the Company 9. Personal Data breaches

Our society

Our environment

10. Carbon footprint

BASIS FOR OUR CONCLUSION We have performed our limited assurance engagement on the selected non-financial KPIs in accordance with Dutch law, including Dutch Standard 3000A “Assurance-opdrachten anders dan opdrachten tot controle of beoordeling van historische financiële informatie (attest-opdrachten)” (Assurance engagements other than audits or reviews of historical financial information (attestation engagements) ) . Our responsibilities under this standard are further described in the “Our responsibilities for the assurance engagement on the selected non-financial KPIs” section of our report. We are independent of Euronext N.V. in accordance with the “Verordening inzake de onafhankelijkheid van accountants bij assurance-opdrachten” (ViO, code of ethics for Professional Accountants, a regulation with respect to independence) and other relevant independence regulations in the Netherlands. This includes that we do not perform any activities that could result in a conflict of interest with our independent assurance engagement. Furthermore, we have complied with the “Verordening gedrags- en beroepsregels accountants” (VGBA, Dutch code of ethics). We believe that the assurance evidence we have obtained is sufficient and appropriate to provide a basis for our conclusion.

REPORTING CRITERIA The selected non-financial KPIs need to be read and understood together with the reporting criteria. Euronext N.V. is solely responsible for selecting and applying these reporting criteria, taking into account applicable law and regulations related to reporting. The reporting criteria used for the preparation of the selected non-financial KPIs are the reporting criteria developed by Euronext N.V. and are disclosed in section 3.7 (Summary ESG KPI) of the Universal Registration Document. The absence of an established practice on which to draw, to evaluate andmeasure the selected non-financial KPIs allows for different, but acceptable, measurement techniques and can affect comparability between entities and over time. UNASSURED CORRESPONDING INFORMATION No assurance engagement has been performed on the selected non-financial indicators for the year 2019. Consequently, the corresponding selected non-financial indicators for the year 2019 are not assured.

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2020 UNIVERSAL REGISTRATION DOCUMENT