Sopra Steria - 2020 Universal registration document

4 CORPORATE RESPONSIBILITY Report by the independent third party on the consolidated statement of non-financial performance presented in the management report

used analytical procedures to check that the data collected had • been properly consolidated, and that any changes in the data were consistent, carried out detailed, sample-based testing to check that • definitions and procedures had been properly applied and to reconcile data with supporting documents. This work was undertaken on a selection of contributing entities and countries (see Annex) and covered between 55% and 91% of the consolidated data used in the key performance indicators and results selected for these tests; we assessed the Statement’s overall consistency based on our p understanding of the Company. We believe that the work we have undertaken, to the best of our professional judgement, provides a sufficient basis for our limited assurance conclusion. A higher level of assurance would have required more extensive verification procedures. " #( # ' ($*' ( Our work was carried out by a team of six people between October 2020 and February 2021 and required a total of 10 weeks. We conducted around ten interviews with individuals responsible for preparing the Statement, notably representing Human Resources and Corporate Responsibility and Sustainable Development departments.

of non-financial performance is not consistent with applicable regulatory provisions and that the Information, taken as a whole, is not presented fairly in accordance with the Guidelines. ' ($# ! ((*' # ' %$') $# ( ! ) (' # $'" ) $# Regarding the information selected by the Company and identified by the symbol ✔ , we performed, at the request of the Company and in line with its proactive approach, the same types of procedure as those described in the “Nature and scope of work” section above for the key performance indicators and the other quantitative results that we considered to be the most important, but in a more in-depth manner, in particular with respect to the number of tests conducted. The selected sample thus represents an average of 58% of the workforce and between 53% and 91% of environmental data identified by the symbol ✔ . We believe that these procedures enable us to express a reasonable assurance conclusion with respect to the information selected by the Company and identified by the symbol ✔ . $# !*( $# In our opinion, the information selected by the Company and identified by the symbol ✔ has been prepared, in all material respects, in accordance with the Guidelines.

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Based on the work performed, we did not identify any material misstatement that would cause us to conclude that the statement

Paris La Défense, 3 March 2021

Independent third party Mazars SAS

Bruno POUGET Partner

Edwige REY CSR & Sustainable Development Partner

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SOPRA STERIA UNIVERSAL REGISTRATION DOCUMENT 2020