Dedienne Multiplasturgy Group

What Dedienne Multiplasturgy Group does

DEMGY is a French private industrial group founded in 1947 in Clamart that manufactures and industrializes complex plastic, composite, and high-performance polymer solutions for sectors with high carbon footprints, positioning plastic and composite parts as lighter alternatives to metal. The group's core differentiator is the proprietary circular Multiplasturgy® concept, a single-vendor offering that consolidates fifteen manufacturing areas—additive manufacturing, smart plastic products/plastronics, micro injection, composite materials, thermoforming, injection, polymer machining, metallization and coating, painting/decoration/assembly, tool design and manufacture, compression molding, PCTFE/PTFCE extrusion, composite machining, and thermoset molding—into a coordinated, eco-design-led offering covering end-of-life recyclability. The group complements its manufacturing with proprietary digital assets (the DataComp® polymer pre-selection database and the BuyPolymers e-commerce gateway for ultra-high-performance polymers) and with novel process IP such as the April 2024 Press&Make single-step, zero-waste thermocompression technology for shoe-making.

The group's revenue model is B2B contract manufacturing and engineered-parts supply to enterprise customers, executed through direct enterprise field sales. It operates ten business units across France (Saint-Aubin-sur-Gaillon, La Courneuve), Romania (Făgăraș, Deva), the USA (Chicago, Tacoma), and Germany, supplemented by sales offices in Israel and the UK, reaching customers in over 25 countries. It targets six primary verticals—Aerospace, Automotive, Medical, Defense (primary verticals), and Energy and Sports/Leisure (secondary)—delivering 615+ projects per year with a workforce of approximately 900. Since a 2004 management buyout led by Pierre-Jean Leduc, the group has expanded predominantly through acquisition, integrating six specialty manufacturers between 2015 and 2025, including EIS Aircraft GmbH (German aerospace components, September 2023) and Tool Gauge (US aerospace cabin interiors, March 2025). The group rebranded to DEMGY in June 2021 alongside the TOGETHER strategy focused on customers, Industry 4.0, and Corporate Social Responsibility, and partners with organizations including GIFAS, France Hydrogène, IRT Jules Verne, TPRC, SNITEM, POLYVIA, Normandie AeroEspace, and the Pacific Northwest Aerospace Alliance to maintain access to regulated end-markets.

The group recognized as France's Best-Managed Companies 2026 by Deloitte, signaling third-party validation of operational quality, though financial disclosures remain private.

Name

Dedienne Multiplasturgy Group

Legal name

DEMGY

Website

https://dedienne.com

Company type

Private

Founded year

1947

Operating status

Operating

Headcount range

501–1,000 employees

Short description

DEMGY is a French industrial group manufacturing plastic, composite, and high-performance polymer solutions for aerospace, automotive, medical, defense, and energy sectors. With ten sites across France, Romania, the USA, and Germany, it serves enterprise customers through contract manufacturing under its proprietary Multiplasturgy® concept.

Ownership category

akta.pro rank

Product category

Plastic and Composite Manufacturing

NAICS

Plastics Product Manufacturing (3261)

SIC

Miscellaneous Plastics Products (3080)

akta.pro primary industry

Custom Injection Molding & Contract Manufacturing (Job Shops/CMs) (IMANAFAJ)

akta.pro secondary industries

Custom Thermoforming & Contract Manufacturing (IMANAHAI), Plastic Compounding & Masterbatch (IMANAOAB), Thermoformed Automotive & Transportation Components (IMANAHAE)

Keywords

• Plastic injection molding
• Composite material manufacturing
• High performance polymers
• Aerospace plastic components
• Additive manufacturing services

Headquarters

HQ city

Saint-aubin-sur-gaillon

HQ country

France

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Complex Plastic Solutions Manufacturing: DEMGY manufactures and industrializes complex plastic and composite solutions that are lighter than metal and have high performance for sectors with high carbon footprint, operating in a responsible and circular manner.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

DEMGY manufactures and industrializes complex plastic and composite solutions that are lighter than metal and deliver high performance for sectors with high carbon footprints, operating through a unique circular Multiplasturgy® concept covering 15 areas of expertise. The group supplies engineered parts, components, and assemblies for aerospace, automotive, medical, defense, energy, and sports/leisure customers, complemented by the DataComp® polymer database, BuyPolymers digital gateway, Atelier 3D additive manufacturing, and Press&Make thermocompression technology.

Product overview

Dedienne Multiplasturgy Group (DEMGY) operates as a diversified industrial group offering plastic, composites, and high performance polymer solutions. The portfolio includes DataComp® (a polymer database for material selection), BuyPolymers (an e-commerce platform for high-performance polymers), and Atelier 3D (additive manufacturing services). The group also offers Press&Make thermocompression technology. The core differentiator is the circular Multiplasturgy® concept encompassing 15 manufacturing areas including injection, compression molding, thermoforming, additive manufacturing 3D, smart plastic products/plastronics, micro injection, composite materials, polymer machining, metallization/coating, painting/decoration/assembly, and thermoset molding. The group has acquired multiple specialized companies including DEMGY Pacific (aerospace interiors), DEMGY EIS GmbH (aerospace components Germany), DEMGY SPN (France), DEMGY DEVA (Romania), Met2Plastic (USA), and CG.TEC injection (precision injection).

Differentiator

Problem solved

Functional benefit

Brands

• DataComp®: Database of plastics and composites to help in pre-selection of polymers, simple, complete, comparative
• Atelier 3D
• Press&Make
• BuyPolymers

Products and services

• Multiplasturgy® Engineered Plastic and Composite Manufacturing Core contract manufacturing service covering 15 areas of expertise (injection, compression molding, thermoforming, additive manufacturing 3D, micro injection, composites creation, polymer machining, metallization/coating, painting/assembly, tools design, PCTFE/PTFCE extrusion, plastic/composite machining, thermoset molding, plastronics) producing lighter-than-metal, high-performance parts for aerospace, automotive, medical, defense, energy, and sports/leisure customers.
• DataComp® Polymer Database Consultable database of plastics and composites designed to help users pre-select polymers, offering simple, complete, and comparative information to answer most technical questions about material selection.
• BuyPolymers Ultra-High-Performance Polymers Gateway Digital e-commerce gateway where customers can discover, compare, and request ultra-high-performance polymers engineered for extreme environments, tailored for aerospace, space, defense, medical, and other demanding applications.
• Atelier 3D Additive Manufacturing Service Additive manufacturing service for mass production of complex parts in high-performance materials, supporting customers needing volume production of intricate geometries.
• Press&Make Thermocompression Technology Proprietary single-step thermocompression manufacturing technology for producing shoes with zero waste, adaptable to all shapes and textures.
• Aerospace Plastic and Composite Components Engineered plastic and composite parts, components, and assemblies for the aerospace and defense sectors, including cabin interior components (DEMGY Pacific) and aerospace structural components (DEMGY EIS GmbH), supporting internationalization, growth, and innovation requirements.
• Automotive Plastic Solutions Plastic and composite solutions for automotive lightening, embedded electronics, autonomy, and new modes of propulsion (electric, hydrogen), designed without compromising safety.
• Medical and Pharmaceutical Plastic Components Plastic parts and components for pharmaceutical industry, medical device manufacturers, laboratory equipment, microfluidics, and personalized medicine applications.
• Defense Plastic and Composite Solutions Plastic and composite components engineered for defense and national security applications, leveraging rigor in design and innovation.

Quantifiable outcome

• More than 615 projects completed each year
• +1 more outcomes

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

14 partnerships are on record, tiered core and minor.

• SiemenscoreTechnology or Integration · 1 January 2021Partnership with Siemens for production control system implementation as part of digital transformation, implemented at DEMGY Normandy and DEMGY Făgăraș in January 2021.
• France HydrogènecoreStrategic or Co-development PartnerActive member of France Hydrogène association supporting hydrogen economy development and related plastic solutions.
• GIFAScoreStrategic or Co-development PartnerMember of Groupement des Industries Françaises Aérospatiales for aerospace industry collaboration.
• IRT Jules VernecoreStrategic or Co-development PartnerCollaborative research institute for manufacturing technologies, DEMGY participates in collaborative projects.
• TPRC Thermoplastic Composites Research CentercoreStrategic or Co-development PartnerResearch partnership for thermoplastic composites development and application.
• PolymeriscoreStrategic or Co-development PartnerCluster for polymers and plastics innovation in France.
• POLYVIAcoreStrategic or Co-development PartnerFrench plastics and composites industry association.
• SNITEMcoreStrategic or Co-development PartnerFrench medical devices industry association.
• ProxinnovminorStrategic or Co-development PartnerInnovation cluster for industrial performance.
• La French FabminorStrategic or Co-development PartnerFrench manufacturing industry network.
• Normandie AeroEspacecoreStrategic or Co-development PartnerRegional aerospace cluster in Normandy.
• Pacific Northwest Aerospace AlliancecoreStrategic or Co-development PartnerUS aerospace industry alliance for Pacific Northwest region.
• IARminorStrategic or Co-development PartnerInnovation cluster for industries and renewable resources (now Bioeconomy for Change).
• Innovation Plasturgie CompositescoreStrategic or Co-development PartnerTechnical center for plastics and composites innovation.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Emerging players

• Socomore: French specialty chemical and surface treatment supplier for aerospace; adjacent rather than directly competing, but comparable as a French mid-cap serving the same aerospace customer base with engineered material solutions.

Direct peers

• Hexcel: US-listed advanced composites manufacturer for aerospace and industrial applications; directly comparable in carbon-fibre and high-performance composite part production for aerospace.
• Senior plc: UK-listed engineered components and fluid conveyance systems group serving aerospace, defense and industrial markets, with comparable contract manufacturing and acquisition-driven growth strategy.
• LISI Group: French aerospace and automotive fastener and structural component manufacturer; comparable in serving aerospace primes with safety-critical engineered parts and in pursuing aerospace bolt-on M&A.
• Trelleborg: Swedish engineered polymer solutions group serving aerospace, automotive, medical and industrial customers, with comparable precision plastic and composite component manufacturing.
• Latécoère: French Tier 1 aerostructures and systems supplier; comparable in serving Airbus and other primes with composite-intensive structural components and cabin-related subsystems.
• Hutchinson: TotalEnergies-owned French polymer solutions specialist serving automotive, aerospace, defense and industrial customers with vibration, sealing and composite parts — directly comparable Multiplasturgy-style platform play.
• Toray Advanced Composites: Specialist in thermoplastic and thermoset composite materials and parts for aerospace, defense and industrial customers, comparable to DEMGY's thermoplastic composites research focus.
• Plastic Omnium: French-listed plastic and composites manufacturer serving automotive and new-energy mobility, with comparable engineered-parts capabilities and a similar contract-manufacturing business model targeting global OEMs.

Broad incumbents

• Faurecia (Forvia): Much larger French automotive Tier 1 with extensive plastics and lightweighting capability; comparable in automotive lightweighting and use of composites, but operates at significantly larger scale and broader scope.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/dedienne-multiplasturgy-group-sas

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries9 records

Funding overview

Funding rounds1 record

Investors1 record

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

M&A2 records

Investments

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

Frequently asked questions about Dedienne Multiplasturgy Group