What Groupe MAÏA does

Groupe MAÏA is a privately held, family-controlled French industrial holding company (99% owned by the Gruy family) founded in 1908 and headquartered in Lyon, operating through three poles and 14 wholly-owned subsidiaries. The Infrastructure & Environment pole (Maïa Sonnier, Maïa Fondations, Deluermoz, Maïa Rail, Maïa Sécurité Ferroviaire, Transtelec, Bernasconi) delivers civil engineering, foundation works, underground and heritage restoration, rail construction and maintenance, and electrical/telecoms works across France and Switzerland Romandy. The Real Estate & Energy pole (Maïa Immobilier, Maïa Énergie) develops residential programs in Auvergne-Rhône-Alpes and Île-de-France and operates renewable energy assets including a 100 MW photovoltaic pipeline, geothermal drilling, and EV charging infrastructure. The Patrimoine & Art de Vivre pole (Villa Maïa 5-star hotel, Château de La Chaize wine estate, Belle de Maïa and VALCENA Paris cosmetics) runs heritage hospitality and lifestyle brands.

The group generates revenue through project-based contracts won via competitive tenders with French public authorities (SNCF Réseau, Voies Navigables de France, Groupe ADP, Saint Etienne Métropole, City of Lyon), EPC and installation services for renewable energy, property sales for residential developments, and luxury hospitality and wine sales. Specialized qualifications — including nuclear civil engineering certification, heritage restoration under the Chief Architect of Historic Monuments, and ISO 9001/14001 plus HVE certifications — function as entry barriers. With approximately 700 employees, ~€200M in annual revenue, €179M of shareholders' equity, and 123 ongoing operations, the group combines deep technical specialization with a diversified multi-pole structure intended to deliver integrated infrastructure-to-hospitality projects under a single family-controlled counterparty.

Name

Groupe MAÏA

Legal name

Groupe Maïa SA

Website

https://groupe-maia.com

Company type

Private

Founded year

1908

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Groupe MAÏA is a privately held, family-owned French industrial holding company operating through 14 subsidiaries across three poles: infrastructure and civil engineering, renewable energy and real estate development, and heritage hospitality (5-star hotel, historic vineyard, cosmetics).

Ownership category

akta.pro rank

Headquarters

HQ city

Lyon

HQ country

France

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Infrastructure & Civil Engineering Services: Maïa Sonnier, Maïa Fondations, Deluermoz, Maïa Rail, Maïa Sécurité Ferroviaire, Bernasconi, and Transtelec provide construction and engineering services for civil infrastructure projects (bridges, dams, tunnels, hydraulic works, nuclear civil engineering, urban development, rail infrastructure). Revenue is generated through project-based contracts with public authorities and private clients.
2. Renewable Energy Production & Installation: Maïa Énergie designs, builds, and operates photovoltaic solar plants, geothermal systems, and EV charging infrastructure. Revenue is generated through energy production (electricity sales), EPC (engineering, procurement, construction) contracts, and installation services. The group operates with 100 MW of photovoltaic power in development.
3. Real Estate Development: Maïa Immobilier develops residential and mixed-use property programs in the Auvergne-Rhône-Alpes and Île-de-France regions. Revenue is generated through property sales and co-development partnerships with firms such as Lamotte Rhône-Alpes. The portfolio includes 829 residential units.
4. Hospitality & Tourism (Patrimoine & Art de Vivre): The group operates Villa Maïa (5-star hotel, member of The Leading Hotels of the World), Château de La Chaize (wine estate with 450 hectares of vineyards producing wine, with HVE certification), Belle de Maïa (cosmetic brand), and Valcena Paris. Revenue includes hotel stays, wine sales, and cosmetic product sales.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Groupe MAÏA is a diversified French industrial holding company operating 14 complementary subsidiaries across three poles: Infrastructure & Environment (civil engineering, foundations, underground works, railway infrastructure), Real Estate & Energy (photovoltaic, geothermal, EV charging, residential development), and Heritage & Art de Vivre (luxury hospitality, wine estate, cosmetics). The group delivers civil engineering and construction services for public infrastructure, develops renewable energy assets, builds residential programs, and operates heritage hospitality venues.

Product overview

Groupe MAÏA is a diversified French holding company founded in 1908, comprising 14 complementary subsidiaries organized under three operational poles: (1) Infrastructures & Environnement (Maïa Sonnier, Maïa Fondations, Deluermoz, Maïa Rail, Maïa Sécurité Ferroviaire, Transtelec, Bernasconi) covering civil engineering, foundations, underground works, and rail infrastructure; (2) Immobilier & Énergie (Maïa Énergie, Maïa Immobilier) focused on renewable energy production (photovoltaic, geothermal, EV charging) and eco-friendly real estate development; and (3) Patrimoine & Art de Vivre (Château de La Chaize, Villa Maïa, Belle de Maïa, VALCENA Paris) managing heritage hospitality including a 5-star hotel, a historic wine estate, and cosmetics. The group operates with approximately 700 employees, €200M revenue, and 10 locations across France and Switzerland.

Differentiator

Problem solved

Functional benefit

Brands

• Maïa Immobilier: Real estate development subsidiary operating in Auvergne-Rhône-Alpes and Île-de-France regions.
• Maïa Énergie
• Maïa Sonnier
• Maïa Fondations
• Deluermoz
• Maïa Rail
• Maïa Sécurité Ferroviaire
• Transtelec
• Bernasconi
• Villa Maïa
• Château de La Chaize
• Belle de Maïa

Products and services

• MAÏA Sonnier Civil engineering services covering industrial civil engineering, hydraulic civil engineering, nuclear civil engineering, urban engineering, and art works (bridges, viaducts, covered trenches). Acts as a general contractor for public infrastructure projects across France.
• MAÏA Fondations Foundation and earth retention works specialist offering driven piles, micropiles, underpinning, jet grouting, sheet piling, rockfill, and dredging. Also performs fluvial and maritime civil engineering works.
• Deluermoz Underground works, demolition, collector rehabilitation, and heritage restoration services. Handles tunnel renovation, gallery construction, well drilling, structural deconstruction, and restoration of historic monuments under direction of the Chief Architect of Historic Monuments.
• MAÏA Rail Railway construction company specializing in railway track works and railway network maintenance. Performs track rehabilitation, rail replacement, catenary protection, and infrastructure modernization for SNCF Réseau and other rail operators.
• MAÏA Sécurité Ferroviaire Railway safety services subsidiary providing safety services and protection systems for rail construction and maintenance operations.
• Transtelec Electrical and telecommunications works company based in Île-de-France, specializing in electricity and telecom infrastructure installation.
• Bernasconi Civil engineering and technical structures company founded in 1938, based in Swiss Romandy. Specializes in technical civil engineering constructions including tunnels and infrastructure projects in Switzerland.
• MAÏA Énergie Renewable energy producer and installer specializing in photovoltaic solar power, geothermal systems, and EV charging infrastructure (IRVE). Designs and constructs sustainable energy solutions for residential, commercial, and industrial clients. Operates with 100 MW of photovoltaic power in development.
• MAÏA Immobilier Real estate developer creating residential and commercial programs in Auvergne-Rhône-Alpes and Île-de-France regions. Develops quality, environmentally-responsible property programs. Won the FPI Silver Pyramid 2022 for the EKOOS project. Portfolio includes 829 residential units.
• Villa MAÏA Five-star boutique hotel with 37 keys on Lyon's historic hill (L'Antiquaille), designed by Jean-Michel Wilmotte. Member of The Leading Hotels of the World. Features the Ambassade Lyonnaise dining experience for luxury travelers.
• Château de La Chaize Historic wine estate spanning 450 hectares of property (including 350 hectares of contiguous vineyards) in Provence, classified as a Historical Monument. HVE certified and in conversion to organic viticulture. Produces and sells wine under the Château de La Chaize brand.
• Belle de MAÏA (VALCENA Paris) Cosmetic brand under the Patrimoine & Art de Vivre pole, including the VALCENA Paris sub-brand. Creates and sells luxury skincare products including precious oil ranges for premium consumers.

Quantifiable outcome

• 100 MW of photovoltaic power in development
• +3 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered minor and core.

• Made In PastminorStrategic or Co-development Partner · 1 January 2025Made In Past partnered with Maïa Immobilier on the Major'Fret project in Caluire-et-Cuire, responsible for the deconstruction and material reuse (dépose des matériaux pour le réemploi) portion of the renovation project.
• HTC (Contractant Général)coreImplementation/ SI/ Consulting Partner · 1 January 2025HTC acts as the general contractor (contractant général) on the Major'Fret project in Caluire-et-Cuire, working alongside Maïa Immobilier teams. The project involves demolition, asbestos removal, and building renovation.
• PINTOcoreImplementation/ SI/ Consulting Partner · 1 January 2024Maïa Sonnier and PINTO formed a joint venture to execute the civil engineering works for the new drinking water treatment plant (UTEP) in Meaux. PINTO brings specialized expertise complementing Maïa Sonnier's civil engineering capabilities for this water infrastructure project.
• FRANKI FONDATIONcoreStrategic or Co-development Partner · 1 January 2024FRANKI FONDATION joined Maïa Sonnier (as lead contractor/mandataire) and MBB in a consortium for the VALTRAM project in Aubagne near Marseille. The project involves tramway infrastructure development.
• MBBcoreStrategic or Co-development Partner · 1 January 2024MBB partnered with Maïa Sonnier (as mandataire) and FRANKI FONDATION for the VALTRAM project in Aubagne, bringing additional civil engineering capacity to the tramway infrastructure consortium.
• ENGIE-INEOminorImplementation/ SI/ Consulting Partner · 1 January 2020ENGIE-INEO partnered with Maïa Rail as co-contractor for catenary (overhead electrical line) work on the Massy-Palaiseau project, part of the Grand Paris Metro Line 18 and Tram T12 Express development.
• Lamotte Rhône-AlpescoreStrategic or Co-development Partner · 1 January 2019Maïa Immobilier and Lamotte Rhône-Alpes have formed a co-promotion partnership for residential development projects in the Auvergne-Rhône-Alpes region. The collaboration has won multiple municipal competitions: Neuville-sur-Saône (Ilôt Dugelay project) and Sainte Colombe ('Les Petits Jardins' project). This partnership leverages Maïa's real estate development expertise with Lamotte's complementary capabilities.
• SNCF RéseaucoreOthers · 1 January 2019SNCF Réseau is a key client for Maïa Sonnier, Maïa Rail, and Maïa Sécurité Ferroviaire. Projects include railway modernization (triage de Sibelin), track replacement, CDG Express station works, and ongoing rail network maintenance and upgrade contracts.
• Groupe ADP (Aéroports de Paris)coreOthers · 1 January 2019Groupe ADP, manager of Paris airports, awarded Maïa Sonnier major contracts including modifications to the CDG Express railway station at Terminal 2 (designed by architect Paul Andreu) and structural renovation of the car park at Terminal 2 of Roissy Charles de Gaulle Airport.
• Voies Navigables de France (VNF)coreOthers · 1 January 2019VNF is the public agency responsible for France's navigable waterways. Maïa Sonnier has executed multiple dam renovation projects (Barrage de Vaux, Barrage des Essarts) for VNF, demonstrating long-standing relationship in hydraulic infrastructure.

Scale indicators12 records

Recent moves12 records

Expansion highlights7 records

Broad incumbents

• Vinci Construction: Vinci is Europe's largest construction and concessions group, with extensive civil engineering, foundation, rail, and energy divisions that overlap directly with Groupe MAÏA's Infrastructure & Environment pole. Comparable as a multi-specialty French infrastructure operator with public-sector tender exposure, though significantly larger in scale.
• Bouygues Construction: Bouygues Construction is a major French and international civil engineering, building, and energy contractor with comparable specializations in complex public infrastructure. It competes head-to-head with Maïa Sonnier on tenders such as Grand Paris and railway modernization projects.
• Eiffage Construction: Eiffage is a leading French construction and concessions group operating in civil engineering, energy, and infrastructure concessions. Directly comparable given its mix of public infrastructure projects, rail works, and renewable energy concessions, all served by an integrated French regional office network.

Direct peers

• NGE (Nouvelles Générations d'Entrepreneurs): NGE is a French independent multi-business infrastructure group covering earthworks, civil engineering, foundations, rail, and energy — closely mirroring the structure of Groupe MAÏA's Infrastructure & Environment pole. Of similar privately-held, founder-controlled character and active on the same public tender markets in France.
• Spie Batignolles: Spie Batignolles is an independent French construction group with civil engineering, foundations, public works, and energy divisions directly comparable to Maïa Sonnier, Maïa Fondations, and Maïa Rail. Closely matched size profile and similar public-sector client mix including SNCF and metropolitan authorities.
• Demathieu Bard: Demathieu Bard is a family-owned French construction group operating in civil engineering, infrastructure, real estate development, and heritage restoration. Highly comparable given its independent ownership structure and similar positioning on complex public infrastructure projects, including heritage and rail works.
• Léon Grosse: Léon Grosse is an independent French construction group with civil engineering, building, and real estate development operations. Comparable in scale, ownership independence, and its mix of public infrastructure tenders with private real estate development programs.
• Razel-Bec (Fayat Group): Razel-Bec is a French civil engineering specialist within the Fayat group, active in earthworks, foundations, hydraulic infrastructure, and large public infrastructure projects. Direct competitor on tenders such as dams, hydraulic works, and African/international civil engineering projects.
• Nexity: Nexity is France's largest real estate developer, with residential and mixed-use programs in the same Auvergne-Rhône-Alpes and Île-de-France regions where Maïa Immobilier operates. Comparable as a peer for the real estate development pole and a relevant benchmark for FPI awards such as the Pyramide d'Argent.
• Compagnie Lebon: Compagnie Lebon is a French family-controlled holding company operating heritage hotels, real estate, and luxury hospitality assets including the Normandy and Les Bains de Cabourg. Comparable as a peer for the Patrimoine & Art de Vivre pole, with similar French family ownership and luxury heritage positioning.

Market position

Strengths5 records

Weaknesses2 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries13 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 Groupe MAÏA