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5-day change | 1st Jan Change | ||
| 43.30 EUR | +0.23% |
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+3.10% | +1.41% |
| 07-24 | French and Benelux stocks-Factors to watch | RE |
| 07-23 | Assystem S.A. Reports Unaudited Consolidated Revenue Results for the Six Months Ended June 30, 2026 | CI |
Business description: Assystem

Net sales break down by market between nuclear sector (77%) and others (23%; transport, energy, non-nuclear complex infrastructure, etc.).
Nes sales are distributed geographically as follows: France (59.1%), the United Kingdom (25.1%) and other (15.8%).
Number of employees: 7,656
Sales by Activity: Assystem
| Fiscal Period: December | 2021 (EUR) | 2022 (EUR) | 2023 (EUR) | 2024 (EUR) | 2025 (EUR) |
|---|---|---|---|---|---|
France | - | - | - | 385M | 389M |
International | - | - | - | 232M | 271M |
Eliminations | - | - | - | -5.9M | -3.3M |
Assystem Operations | 483M | 494M | 578M | - | - |
Geographical breakdown of sales: Assystem
| Fiscal Period: December | 2021 (EUR) | 2022 (EUR) | 2023 (EUR) | 2024 (EUR) | 2025 (EUR) |
|---|---|---|---|---|---|
France | 352M | 350M | 375M | 381M | 388M |
United Kingdom | - | - | - | 126M | 165M |
Other | - | - | - | 105M | 104M |
Asia-Middle East-Africa | 77.4M | 70.9M | 103M | - | - |
Rest of Europe | 53.7M | 72.1M | 99.6M | - | - |
Executive Committee: Assystem
| Manager | Title | Age | Since |
|---|---|---|---|
Dominique Louis
CEO | Chief Executive Officer | 75 | 22/05/2014 |
Malène Korvin
DFI | Director of Finance/CFO | - | 01/02/2023 |
Laurent Deletain
CTO | Chief Tech/Sci/R&D Officer | - | 01/06/2017 |
Cori Cabistany
CMP | Compliance Officer | - | 01/04/2018 |
Thomas Branche
CTO | Chief Tech/Sci/R&D Officer | - | 01/01/2016 |
Composition of the Board of Directors: Assystem
| Director | Title | Age | Since |
|---|---|---|---|
Dominique Louis
CHM | Chairman | 75 | 22/05/2014 |
Gilbert Lehmann
BRD | Director/Board Member | 80 | 03/05/2004 |
Miriam Maes
BRD | Director/Board Member | 70 | 12/05/2011 |
Vincent Favier
BRD | Director/Board Member | 58 | 22/05/2014 |
Virginie Calmels
BRD | Director/Board Member | 55 | 09/03/2016 |
Nathalie Font
BRD | Director/Board Member | 56 | 14/12/2018 |
Julie Louis
BRD | Director/Board Member | 56 | 26/06/2020 |
Holdings: Assystem
| Name | Stocks | % | Valuation |
|---|---|---|---|
EXPLEO SOLUTIONS LIMITED 71.05% | 11,026,058 | 71.05% | 93 M $ |
ASSYSTEM 5.29% | 828,848 | 5.29% | 38 M $ |
| 14,241,464 | 1.05% | 737 708 $ |
Company details: Assystem

Group companies: Assystem
| Name | Category and Sector |
|---|---|
Assystem Engineering & Operation Services SAS
Assystem Engineering & Operation Services SAS Engineering & ConstructionIndustrial Services Provides engineering services |
Engineering & Construction
|
Other Construction & Engineering
| Change | 5-day change | 1-year change | 3-year change | Capi.($) | ||
|---|---|---|---|---|---|---|
| +0.23% | +3.10% | -9.70% | -4.42% | 743M | ||
| +0.60% | +0.67% | +73.99% | +231.46% | 101B | ||
| -0.99% | +2.28% | +1.37% | +22.17% | 80.3B | ||
| -1.11% | -2.03% | +144.96% | +836.01% | 59.54B | ||
| -0.12% | +2.70% | +12.15% | +53.63% | 58.47B | ||
| +0.46% | +1.09% | +27.64% | +93.07% | 47.82B | ||
| -1.05% | +2.08% | +116.46% | +408.89% | 39.35B | ||
| +1.05% | +2.44% | +32.14% | +269.34% | 36.03B | ||
| -0.27% | -1.18% | +75.10% | +247.24% | 34.92B | ||
| -1.09% | -3.83% | -20.98% | -24.79% | 27.68B | ||
| Average | -0.23% | +0.61% | +45.31% | +213.26% | 48.59B | |
| Weighted average by Cap. | -0.23% | +0.68% | +53.56% | +239.29% |
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