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Yseulys Costes
Chief Executive Officer at
1000MERCIS
Net worth: 48 179 $ as of 2026-05-30
Profile
Yseulys Costes is the founder of 1000mercis SA, founded in 2000, holding the title of Co-Chief Executive Officer.
Current jobs include Chairman at Positive Ympact SAS since 2022, Member of the Supervisory Board at Ocito SA since 2012, Member of the Strategy Board at the City of Paris, and Member at Conseil pour la Diffusion de la Culture Économique.
Former jobs include Independent Director at SEB SA, Independent Director at Kering SA from 2010 to 2022, Member of the Supervisory Board at Vivendi SE from 2013 to 2017, Member at Conseil des Entreprises et Groupements de l'Economie Sociale, Member of the Supervisory Board at Made in Presse from 2010 to 2012, and Member of the Supervisory Board at Numergy SAS. Education includes undergraduate degrees from Université Paris 1 Panthéon-Sorbonne and Université Paris Dauphine-PSL, a graduate degree from Université Paris Dauphine-PSL, and an MBA from Anderson School of Management.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
SEB SA 0% | 2024-12-30 | 825 ( 0% ) | 48 117 $ | 2026-05-30 |
| 2024-10-14 | 2 ( 0% ) | 62 $ | 2025-01-30 |
Yseulys Costes active positions
| Companies | Position | Start |
|---|---|---|
| 1000MERCIS | Chief Executive Officer | 2000-02-10 |
Ocito SA
 Ocito SA Miscellaneous Commercial ServicesCommercial Services Specializes in mobile network marketing and advertising | Director/Board Member | - |
Conseil pour la Diffusion de la Culture Économique | Corporate Officer/Principal | - |
City of Paris
 City of Paris MunicipalityGovernment Functions as a local level government authority | Corporate Officer/Principal | - |
Positive Ympact SAS
 Positive Ympact SAS Real Estate DevelopmentFinance Positive Ympact SAS is a private company based in Paris, France. | Chairman | 2022-02-03 |
Former positions of Yseulys Costes
| Companies | Position | End |
|---|---|---|
| KERING | Director/Board Member | 2022-04-27 |
| VIVENDI SE | Director/Board Member | 2017-04-24 |
Made in Presse | Director/Board Member | 2011-12-31 |
Conseil des Entreprises et Groupements de l'Economie Sociale | Corporate Officer/Principal | - |
| ░░░ ░░░░ | ░░░░░░░░░░░░░░ ░░░░░░ | - |
Training of Yseulys Costes
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
66
1st degree connections
14
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 14 |
|---|---|
Vivendi SE
 Vivendi SE Media ConglomeratesConsumer Services Provides media and telecommunication services | Consumer Services |
1000mercis SA
 1000mercis SA Miscellaneous Commercial ServicesCommercial Services Provides interactive, mobile advertising and marketing solutions | Commercial Services |
Kering SA
 Kering SA Consumer SundriesConsumer Non-Durables Designs, manufactures and sells leather goods, luxury apparel and accessories | Consumer Non-Durables |
SEB SA
 SEB SA Electronics/AppliancesConsumer Durables Engages in the manufacturing of small domestic equipment and cookware | Consumer Durables |
Université Paris 1 Panthéon-Sorbonne
 Université Paris 1 Panthéon-Sorbonne Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Université Paris Dauphine-PSL
 Université Paris Dauphine-PSL Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Ocito SA
Ocito SA Miscellaneous Commercial ServicesCommercial Services Specializes in mobile network marketing and advertising | Commercial Services |
City of Paris
City of Paris MunicipalityGovernment Functions as a local level government authority | Government |
Conseil pour la Diffusion de la Culture Économique | |
Conseil des Entreprises et Groupements de l'Economie Sociale | |
Made in Presse | |
Anderson School of Management
 Anderson School of Management Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Numergy SAS
 Numergy SAS Data Processing ServicesTechnology Services Provides cloud computing services | Technology Services |
Positive Ympact SAS
Positive Ympact SAS Real Estate DevelopmentFinance Positive Ympact SAS is a private company based in Paris, France. | Finance |
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