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Activity as of September 30, 2026 Conference on October 27, 2026
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9M Performance: Contributed revenue up +7% (actual scope) stable (organic*) Growth accelerated in Q3 2026: Q3 contributed revenue up +11% (actual scope) Acquisitions: confirmation of a high level of activity Organic*: Contributed revenue up +5% France: Contributed revenue up +2%— Confirmed return to growth (Services, Circular Economy) International: Revenue up +9% – Momentum confirmed across all geographic regions 2026 revenue target confirmed* : between €1,230m and €1,260m Activity as of September 30, 2026 2 Growth across all business segments Annual revenue target confirmed Highlights of the period Hidronor teams (Chile) * On a like-for-like basis and at constant exchange rates
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Contributed revenue up +6.9% Activity performed well in Q3 Activity as of September 30, 2026 53,0 4,3 1,9 14,8 908,3 982,3 9M Revenue 2025 Scope effect Forex Organic change Non-contributed rev. 9M Revenue 2026 Non-contributed revenue: €65.7m (vs. €50.9m as of September 30, 2025) IFRIC 12 investments: €12.5m vs. €0.6m TGAP: €53.2m vs. €50.3m Contributed revenue: €916.6m (vs. €857.9m as of September 30, 2025) +6.9% (actual) +0.2% (organic*) Scope effect: +€53.0m (Hidronor €37.5m + La Filippa €15.5m) FX effect: +€4.3m vs. (€1.5)m Q3 well-oriented in France and internationally: +4,6% (organic) France Contributed Revenue up +1,8%: return to growth across most business segments International Revenue up +9,4% (organic): confirmation of sustainable growth momentum Activity as of September 30, 2026 Change in contributed revenue on a like-for-like basis 50.9 * On a constant scope and exchange rate basis 857.4 916.6 Consolidated data 65.7 3 Change in reported revenue as of September 30, 2026
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Q3: A less demanding 2025 baseline and a sound level of activity Growth across all business segments Activity as of September 30, 2026 4 Quarterly revenue trends 181,8 197,1 175,6 180,6 168,0 178,1 178,8 Q1 Q2 Q3 Q420252026-7,6%-9,6%+1,8%280,3 299,8 277,2 294,7 278,6 293,4 291,6 Q1 Q2 Q3 Q420252026-2,4%*-0,9%*+4,6%*98,5 102,6 101,7 114,1 110,6 115,3 112,8 Q1 Q2 Q3 Q420252026+11,5%*+11,4%*+9,4%*France: Quarterly Change in Contributed Revenue (in €m and on a like-for-like basis) Group: Quarterly Change in Contributed Revenue (in €m and on a like-for-like basis) International: Quarterly Change in Revenue (in €m and on a like-for-like basis) * At constant exchange rate basis * At constant exchange rate basis * At constant exchange rate
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Scope effect: €17.2 million (Hidronor: +€12.6 million – La Filippa: +€4.6 million) FX effect: +€1.4m Organic* : Europe (excluding France): Revenue: €49.2m +5.2% Southern Africa: Revenue: €28.3m +13.8% Latin America: Revenue: €16.8m +21.7% Asia: Revenue: €18.4m +4.8% 175,6 178,8 101,7 112,8 17,2 Q3 2025 Q3 2026ScopeInternationalFranceFrance : Most activities return to growth International : Strong performance across all geographic regions Activity as of September 30, 2026 Contribution from Services (Environmental Emergency) More positive trends in Circular Economy activities (Chemical Purification and Energy –except electricity-) Resilience of Hazard Management activities (solid industrial and municipal markets) 5 Q3 Performance Group: Changes in Contributed Revenue by Geographic Region (in €m and on an actual scope basis) International: Revenue of €130.0m +27.8% (actual) +9.4% (organic) France: Contributed Revenue of €178.8m +1.8% (actual) +1.8% (organic)
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80,2 1,0 - 3,4 6,7 84,5 Q3 2025 Services Circular Economy Hazard … Q3 2026 277,3 17,9 2,3 308,8 11,3 Q3 2025 Services Circular Economy Hazard Management Q3 2026 197,1 16,9 5,7 4,6 224,3 Q3 2025 Services Circular Economy Hazard … Q3 2026 Changes in the business mix Positive business trends—excluding Non-Hazardous Waste electricity— Activity as of September 30, 2026 Q3 Performance 6 Group: Changes in Contributed Revenue by activities (in €m and on a actual scope basis) Hazardous Waste: Change in Contributed Revenue by activities (in €m and on a actual scope basis) Non-Hazardous Waste: Change in Contributed Revenue by activities (in €m and on a actual scope basis) Scope effect: +2.1 Scope effect: +0.4 Scope effect: +14.7 Scope effect: +1.9 Scope effect +0.2 Scope effect: +8.5 Scope effect: +6.1 Scope effect: +0.2 Scope effect: +0.2
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Revenue growth by sector Solid momentum of Hazardous Waste business line Activity as of September 30, 2026 France : Contributed revenue of €58.2m (vs. €63.0m) down (7.7)% Services: (€1.3m) - “Spot” decontamination contracts Circular Economy: (€3.8m) - Impact of electricity sales drop Hazard Management: +€0.3m – Resilient municipal markets International : Revenue of €26.3m (vs. €17.1m) up +53.8% (actual) up +11.9% (organic) Strong Performance in Southern Africa France : Contributed Revenue of €120.6m (vs. €112.5m) up +7.2% Services: +€7.8m – Environmental Emergency contribution Circular Economy: +€3.4m – Improved trends on chemical purification Hazard Management: -€3.1m –Client portfolio transfer and Industrial market resilience International : Revenue of €103.7m (vs. €84.6m) up +22.6% (actual) up +8.9% (organic) LatAm: Strong momentum in industrial markets Spain: Solarca (industrial maintenance) well oriented 7 Q3 Performance NHW Contributed Revenue: €84.5m +6.5% (actual) -3.4% (organic) Change in Contributed Revenue by business lines (actual scope in €m) HW Contributed Revenue: €224.3m +13.8% (actual) +7.9% (organic) 197,1 213,6 10,7 80,2 78,0 6,5 Q3 2025 Q3 2026Hazardous WasteHW scope effectNon-Hazardous WasteNHW scope effect
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Positive trends expected to continue over the coming months France Business resilience despite an uncertain macroeconomic environment International Continued organic growth in key geographic regions Solid contribution from new acquisitions, in line with previous periods Confirmed target for contributed revenue* between €1,230m and €1,260m for fiscal year 2026, including A dynamic contribution from the acquisitions Organic growth ranging between +2% to +3%. Activity as of September 30, 2026 8 Outlook Confirmed Annual revenue target reaffirmed Outlook La Filippa (Italy) * On a like-for-like basis and at constant exchange rates
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Activity as of September 30, 2026 9
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Activity as of September 30, 2026 10 9-Month Revenue Breakdown by geographic region APPENDIX 1 Organic change Gross change September 30, 2026 September 30, 2025 In €m (5.3)% (5.3)% 524.9 554.5 Subsidiaries in France - of which scope effect +10.4% +29.3% 391.7 302.8 International Subsidiaries 53.0 of which scope effect +0.2% +6.9% 916.6 857.4 Contributed revenue
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Activity as of September 30, 2026 11 9-Month Revenue Breakdown by business segment APPENDIX 2 Organic Change Gross Change September 30, 2026 September 30, 2025 In €m +1.4% +4.0% 434.8 418.1 Services 6.4 of which scope effect +0.1% +0.9% 237.8 235.7 Circular Economy 1.5 of which scope effect -2.1% +19.9% 244.0 203.6 Hazard Management 45.1 of which scope effect +0.2% +6.9% 916.6 857.4 Contributed revenue
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Activity as of September 30, 2026 12 9-Month Revenue Breakdown by sector APPENDIX 3 Organic Change Gross Change September 30, 2026 September 30, 2025 In €m +0.8% +6.3% 652.1 613.6 Hazardous Waste 31.5 of which scope effect -1.2% +8.5% 264.5 243.8 Non-Hazardous waste 21.5 of which scope effect +0.2% +6.9% 916.6 857.4 Contributed revenue
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Activity as of September 30, 2026 13 DISCLAIMER This document may contain forward-looking information. This information constitutes either trends or objectives as of the date of this document and should not be regarded as forecasts of earnings or any other performance indicators. By its very nature, this information is subject to risks and uncertainties that are difficult to predict and generally beyond the Company’s control, which may cause actual results and developments to differ significantly from the trends and objectives stated. These risks include, in particular, those described in the Company’s Universal Registration Document available on its website (www.groupe-seche.com) This information therefore does not reflect the Company’s future performance, which may differ significantly, and no guarantee can be given regarding the realization of these forward-looking statements. The Company makes no commitment to update this information. More complete information about the Company can be found on its website (www.groupe-seche.com) under the “Regulatory Information” section. This document does not constitute an offer of securities or a solicitation of an offer to purchase securities in any jurisdiction, including the United States. The distribution of this document may be subject to laws and regulations in effect in France or abroad. Persons in possession of this document must familiarize themselves with these restrictions and comply with them. Contact Manuel Andersen Director of Investor Relations m.andersen@groupe-seche.com www.groupe-seche.com