Les Éoliennes en Mer Services

What Les Éoliennes en Mer Services does

Les Éoliennes en Mer Services (LEMS) is a French private company (SAS) that serves as the shared-services operating entity for two utility-scale offshore wind farm concessions located off the French Atlantic coast. Its two core operating subsidiaries are Éoliennes en Mer Yeu-Noirmoutier (EMYN), an operational 61-turbine / 500 MW park off the Vendée coast inaugurated on June 12, 2026 with annual production of approximately 1,900 GWh, and Éoliennes en Mer Dieppe Le Tréport (EMDT), a 62-turbine / 500 MW park under construction off the Normandy coast with first grid injection on July 17, 2026. Combined, the two parks are intended to power the equivalent of ~1.65 million people and avoid roughly 135,726 tonnes of CO2-equivalent emissions per year compared to the French electricity mix average.

Technically, LEMS's product is large-scale offshore wind electricity generation using ~8 MW turbines with ~212-meter hub heights installed on jacket foundations (steel lattice subsea structures), supported by offshore electrical substations that collect power from all turbines and step up voltage for transmission to shore via submarine cables. The business model is a regulated utility concession structure: the French state awarded 25-year operating concessions (2026-2050 for EMYN, 2026-2051 for EMDT) via competitive tender in 2014, and the parks sell all electricity to the national grid operator RTE under long-term power purchase agreements priced at €45/MWh (the most recent comparable French offshore wind tender). Capital is sourced from a multi-sponsor consortium led by Ocean Winds (60.25%, itself a 50/50 JV between ENGIE and EDP Renewables), with Sumitomo Corporation (29.5%), La Banque des Territoires (9.75%), Vendée Energie (0.5%), and Allianz as minority participants. The company employs 181 staff across registered offices in Nantes, Dieppe, and La Barre-de-Monts.

Name

Les Éoliennes en Mer Services

Legal name

Les Éoliennes en Mer Services (LEMS)

Website

https://eoliennes-mer.fr

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

101–250 employees

Short description

Les Éoliennes en Mer Services is the shared-services entity operating two French offshore wind farms — EMYN (61 turbines, 500 MW, Vendée, operational since June 2026) and EMDT (62 turbines, 500 MW, Normandy, first grid injection July 2026) — selling all generated electricity under 25-year concessions to national grid operator RTE via fixed-price power purchase agreements.

Ownership category

akta.pro rank

Product category

Offshore Wind Energy Generation

NAICS

Wind Electric Power Generation (221115)

SIC

Electric Services (4911)

akta.pro primary industry

Wind Farm Ownership & Operations (IPP/Utility-Owned Asset Operations) (EUACAFAF)

akta.pro secondary industries

Offshore Wind Power Generation (Fixed-Bottom) (EUACAFAB), Offshore Wind Project Development & Leasing (EUAMACAB)

Keywords

• Offshore wind energy
• Wind farm operations
• Renewable electricity generation
• Marine wind power
• Utility-scale wind energy

Headquarters

HQ city

Nantes

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. Electricity Generation and Sales: The wind farms generate electricity from offshore wind turbines and sell power to the French national electricity grid. Revenue comes from power purchase agreements (PPAs) with grid operators under long-term government concessions (25 years for EMYN: 2026-2050, and for EMDT: 2026-2051). The EMYN park produces approximately 1,900 GWh annually, equivalent to the consumption of approximately 800,000 people (population of Vendée).
2. Government Concession Revenue: Operating under 25-year concessions granted by the French state through competitive tender processes. The consortium won the tender in June 2014 for EMYN and entered construction in January 2024 for EMDT. Revenue is generated throughout the concession period from electricity sales.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

Les Éoliennes en Mer Services develops, constructs, and operates two utility-scale offshore wind farms off the French coast (EMYN and EMDT), each with 500 MW capacity. The company generates renewable electricity from approximately 8 MW offshore wind turbines installed on jacket foundations and sells all output to the French national transmission grid (RTE) under 25-year government concessions through power purchase agreements.

Product overview

Les Éoliennes en Mer Services operates two offshore wind farm projects in France: the Parc Éolien en Mer des Îles d'Yeu et de Noirmoutier (EMYN) in Vendée with 61 turbines generating 496-500 MW, and the Parc Éolien en Mer de Dieppe Le Tréport (EMDT) in Normandy with 62 turbines generating 500 MW. EMYN has completed construction and is in commercial operation since 2026, while EMDT is still under construction with turbine installation ongoing. Both projects are joint ventures primarily led by Ocean Winds (a 50-50 joint venture between ENGIE and EDP Renewables), with participation from Sumitomo Corporation and La Banque des Territoires.

Differentiator

Problem solved

Functional benefit

Brands

• GIS EMYN: Groupement d'Intérêt Scientifique (Scientific Interest Group) associated with the Yeu-Noirmoutier offshore wind farm project.

Products and services

• Parc Éolien en Mer des Îles d'Yeu et de Noirmoutier (EMYN) Offshore wind farm located 11.7 km from Île d'Yeu and 16.5 km from Noirmoutier island off the Vendée coast, consisting of 61 wind turbines with a total installed capacity of approximately 500 MW. Produces roughly 1,900 GWh annually, equivalent to the consumption of approximately 800,000 people (population of Vendée). All electricity is sold to the French national grid (RTE) under a 25-year concession (2026-2050).
• Parc Éolien en Mer de Dieppe Le Tréport (EMDT) Offshore wind farm located off the Normandy coast near Dieppe and Le Tréport, consisting of 62 wind turbines with a total installed capacity of 500 MW. Powers the equivalent of approximately 850,000 people's electricity consumption. Operating under a 25-year concession (2026-2051). First turbines were installed in June 2026 with electricity first injected onto the grid in July 2026.

Quantifiable outcome

• Powers 800,000 people equivalent (EMYN)
• +6 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• GIS EMYN (Groupement d'Intérêt Scientifique)minorStrategic or Co-development PartnerScientific Interest Group established for the EMYN project, bringing together stakeholders for environmental research and monitoring collaboration.

Scale indicators14 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• TotalEnergies: French integrated energy major with a growing offshore wind portfolio (e.g., EolMed floating pilot, partnerships on French tenders). Comparable as a competing developer-operator in French and European offshore wind markets.
• Equinor: Norwegian state energy company developing Hywind (world's first floating offshore wind) and fixed-bottom projects (Dogger Bank, Empire Wind). Comparable as a major offshore wind developer-operator with both traditional and floating expertise.
• Parkwind: Belgian offshore wind developer-operator (Northwester 2, Nobelwind, and Arcadis Ost). Similar mid-sized player focused on European North Sea offshore wind under government concessions; now part of JERA. Closely comparable by scale and project profile.
• RWE Renewables: German utility with a sizable offshore wind portfolio (e.g., Triton Knoll, Kaskasi, Sofia). Directly comparable as a developer-operator of large-scale European offshore wind farms under government concession frameworks.
• Vattenfall: Swedish state-owned utility operating multiple offshore wind farms (Kriegers Flak, Aberdeen Bay, Hollandse Kust). Comparable as a European utility-scale offshore wind asset operator under long-term concessions.
• Ørsted: Global leader in offshore wind development and operation (e.g., Hornsea, Greater Changhua), with both fixed-bottom and floating technology. Directly comparable as a long-term asset owner-operator of utility-scale offshore wind parks under government concessions.
• EDF Renewables: French state-owned utility's renewables arm and a direct French offshore wind competitor, having won multiple French AO tenders (including Calvados, Fécamp, Saint-Nazaire). Closest domestic comparable to LEMS in terms of asset type, geography, and regulatory framework.
• EnBW: German utility operating He Dreiht and other offshore wind farms with a portfolio strategy similar to LEMS's utility-scale, fixed-bottom North Sea focus. Comparable asset-operator profile.
• Iberdrola (Avangrid Renewables): Spanish utility with offshore wind operations through Avangrid and joint ventures (e.g., Vineyard Wind, East Anglia). Operates utility-scale offshore wind under long-term contracts in comparable European/North Atlantic jurisdictions.

Broad incumbents

• Shell (now Shell plc renewables arm): Integrated energy major with offshore wind stakes (e.g., Mayflower Wind, joint ventures). Comparable as a participant in French offshore wind tenders (e.g., AO5 consortium partner) and large-scale offshore wind investor, though not exclusively focused on renewables.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Les Éoliennes en Mer Services