Slide 1: 2025 half-year results
September 2025 2025 half-year results. • Dominique Louis – Chairman & CEO • Malène Korvin – Chief Financial Officer 1
Slide 2: Contents
Contents. 01 Significant events of first-half 2025 Page 4 02 First-half 2025 financial performance Page 7 03 Outlook for full-year 2025 Page 14 04 Appendices Page 17 2
Slide 3: Disclaimer
Disclaimer This presentation includes forward-looking statements, which, by their very nature, involve inherent risks and uncertainties. These statements concern future financial performance and other risks relating to Assystem’s markets as well as its results, levels of business, performance, and o
Slide 4: Significant events of first-half 2025
SIGNIFICANT EVENTS OF FIRST- HALF 2025. 4
Slide 5: A solid first half in view of market trends at end-2024
A solid first half in view of market trends at end-2024. ● Revenue growth in H1 2025, driven by: REVENUE o Steady growth in France thanks to our recognised expertise, despite flatline revenue in the new- build sector €326.4m 76% up 8.3% o Robust organic growth for International operations, particula
Slide 6: Our long-term growth drivers
Our long-term growth drivers Positive trends in all of our nuclear market segments. Installed Nuclear new- Fuel cycle Decom- fleet builds missioning LNPP(1)/SMR R&D Defence Energy production Thanks to the programs for extending the lifespan of Future growth drivers Nuclear redeployment Significant a
Slide 7: First-half 2025 financial performance
FIRST-HALF 2025 FINANCIAL PERFORMANCE. 7
Slide 8: Revenue by geographic region
Revenue by geographic region. €326.4m, up 8.3%, o/w 4.7% organic growth FRANCE 189.6 193.0 BREAKDOWN OF H1 2025 REVENUE BY BUSINESS • Organic growth: 1.8% • Scope effect: - 24% • Total growth: 1.8% 76% NUCLEAR OTHER H1 2024 H1 2025 INTERNATIONAL BREAKDOWN OF H1 2025 REVENUE BY GEOGRAPHIC 133.4 REGIO
Slide 9: First-half 2025 revenue
First-half 2025 revenue. FRANCE INTERNATIONAL (in €m) (in €m) +0.7 +2.7 193.0 189.6 Q1 org. Q2 org. growth growth +6.1 133.4 +10.9 +4.7 117.7 Q1 org. Q2 org. Scope (1) & growth growth currency effects H1 2024 H1 2025 H1 2024 H1 2025 ▪ Slight increase in growth in France (2.9% in Q2 vs 0.7% in Q1 ▪ R
Slide 10: Operating performance in first-half 2025
Operating performance in first-half 2025. EBITA AND EBITA MARGIN (in €m) • Slight increase in EBITA margin, mainly due to the higher 20.4 contribution from the International segment 18.5 +10.2% % of % of 6.1% +0.1pt 6.2% (in €m) H1 2024 H1 2025 revenue revenue Group 18.5 6.1% 20.4 6.2% France 11.3 6
Slide 11: Consolidated profit in first-half 2025
Consolidated profit in first-half 2025. EBITA TO CONSOLIDATED PROFIT (in €m) 7.6 (20.9) 20.4 (0.4) (2.4) 4.3 H1 2025 Contribution Share-based Other non- Net financial H1 2025 of Expleo payments recurring expense(3) EBITA PROFIT Group and (free share expenses and income MPH(1) plans)(2) tax (1) Inclu
Slide 12: Expleo Group's contribution to Assystem's results in H1 2025
Expleo Group’s contribution to Assystem's results in H1 2025. REVENUE €652.5m -10.4% vs H1 2024 EBITDA (1) €48.1m -32% representing a margin of 7.4% (vs 9.7% in H1 2024) CONSOLIDATED PROFIT/(LOSS) (2) €45.6m loss (vs a €12.0m loss in H1 2024) Contribution to Assystem's H1 2025 consolidated profit: €
Slide 13: Movements in net debt
Movements in net debt. (in €m) – Excluding the IFRS 16 impact for all data 86.2 Free cash flow 1.3 14.7 10.6 10.3 49.3 €36.9m 31/12 30/06 M&A Purchases Other cash 2024 2025 and sales flows of treasury shares 13
Slide 14: Outlook for full-year 2025
OUTLOOK FOR FULL-YEAR 2025. 14
Slide 15: Outlook for full-year 2025
Outlook for full-year 2025. Based on the trends observed since the beginning of 2025, and considering the persistently unsettled economic and geopolitical environment, Assystem is standing by its objectives for full-year 2025, i.e.: CONSOLIDATED REVENUE Organic growth(1) of around 5% EBITA MARGIN (2
Slide 16: Thank you
THANK YOU. 2025 FINANCIAL CALENDAR CONTACTS • Malène Korvin – Chief Financial Officer – 28 October: Third-quarter 2025 revenue release mkorvin@assystem.com – Tel.: +33 (0)1 41 25 29 00 • Anne-Charlotte Dagorn – Vice President Marketing and Communication – acdagorn@assystem.com – Tel.: +33 (0)6 83 03
Slide 17: Assystem today
Assystem today. A leader in the nuclear industry ● Assystem is an independent nuclear engineering group 76% ● A strategy followed since 2017 of Europe’s no. 1 Ranked in the world's refocusing on the nuclear sector to help independent nuclear top 3 independent NUCLEAR engineering nuclear engineering
Slide 18: Breakdown of H1 2025 revenue and EBITA
Breakdown of H1 2025 revenue and EBITA. % change % change REVENUE H1 2024 H1 2025 (reported) (organic) (in €m) (2) (1) Consolidation since 1 January 2025 of the UK company, Mactech Energy Group, specialised in construction Group(1) 301.3 326.4 +8.3% +4.7% capabilities for the nuclear industry. Franc
Slide 19: H1 2025 condensed consolidated income statement
H1 2025 condensed consolidated income statement. (in €m) H1 2024 H1 2025 Revenue 301.3 326.4 (1) Operating profit before non-recurring items (EBITA – Earnings Before Interest and Taxes – from Activity) Operating profit before non-recurring items including share of profit of equity-accounted investee
Slide 20: Condensed balance sheet at 30 June 2025
Condensed balance sheet at 30 June 2025. Non-current assets(1) . o/w goodwill: €151.3m 200.2 283.9 • Equity Right-of-use assets (IFRS 16) . 31.3 Expleo Group shares and . 178.8 29.3 • Non-current liabilities(2) convertible bonds 33.6 • Lease liabilities (IFRS 16) 14,2 • Dividends payable (1) Goodwil
Slide 21: Ownership structure
Ownership structure. SHAREHOLDING PATTERN ASSYSTEM SHARES at 31 August 2025 • Euronext Paris Compartment B • Indices: Euronext Tech Leaders, CAC Small, CAC Mid & Small, CAC Industrials, CAC All-Tradable and CAC All-Share 36.56% • ISIN: FR0000074148 Free float (2) • Eligible for equity savings scheme