What Ionisos does

Ionisos is a France-headquartered industrial sterilization services provider operating 11 sites across France, Germany, Spain, Switzerland, and Estonia. Founded in 1993 through the merger of Conservatome and Amphytrion, the company traces its heritage to 1956 and positions itself as a European market leader in ionizing radiation treatment for medical devices, pharmaceuticals, cosmetics, veterinary products, and food packaging.

The company delivers four complementary sterilization technologies — gamma radiation (Cobalt-60), accelerated electron beam (e-beam), X-ray, and ethylene oxide (EO) gas — alongside polymer crosslinking services and R&D capabilities in radiation chemistry, material compatibility, and radiative aging. Its technology mix allows customers to select the appropriate modality based on product sensitivity, with EO enabling low-temperature processing (30–60°C) for heat-sensitive electronics and implants, and ionizing radiation providing residue-free cold sterilization through final packaging.

Ionisos generates revenue through B2B service contracts with enterprise customers in regulated verticals, operating a direct sales model with dedicated account managers and customized quality assurance agreements. Site-level regulatory certifications (ISO 9001, 11137, 13485, 14001, 45001) and pharmaceutical establishment authorizations from AFSSAPS and ANSES underpin customer onboarding and retention. The company is privately held, majority-owned by 3i Infrastructure (as reported in its FY26 Q3 update), having previously been owned by Ardian (2016–earlier) and Agilitas (2014–2016).

Name

Ionisos

Legal name

Ionisos

Website

https://ionisos.fr

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

51–100 employees

Short description

Ionisos is a European leader in ionizing radiation sterilization, operating 11 sites across France, Germany, Spain, Switzerland, and Estonia, and serving medical device, pharmaceutical, cosmetics, veterinary, and packaging manufacturers with gamma, e-beam, X-ray, and ethylene oxide technologies.

Ownership category

akta.pro rank

Product category

Industrial Sterilization Services

NAICS

Irradiation Apparatus Manufacturing (334517)

SIC

X-Ray Apparatus & Tubes & Related Irradiation Apparatus (3844)

akta.pro primary industry

Radiation Processing & Sterilization Services (Medical device sterilization, food irradiation, materials modification) (EUAKAIAG)

Keywords

• Industrial sterilization services
• Gamma radiation sterilization
• Electron beam sterilization
• Ethylene oxide sterilization
• Polymer crosslinking

Headquarters

HQ city

Chaumesnil

HQ country

France

HQ region

Europe

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Sterilization Services: Core revenue stream from industrial sterilization services for medical devices, pharmaceutical products, and cosmetic products using gamma, e-beam, X-ray, and ethylene oxide technologies. Process is automated with specific doses and exposure durations. Revenue is service-based, likely project or contract-based B2B pricing.
2. Polymer Crosslinking (Réticulation): Treatment services to improve mechanical properties and durability of thermoplastic films and materials through ionizing radiation. Secondary revenue stream complementing sterilization services.
3. Research & Development Services: Custom testing, development, and consulting services for diversified applications including flammability treatment of linen, semiconductor material optimization, and new applications development.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Ionisos provides industrial sterilization and decontamination services for medical devices, pharmaceutical products, cosmetics, and packaging using four complementary ionizing radiation technologies: gamma rays, accelerated electron beams (e-beam), X-rays, and ethylene oxide gas. The company also offers polymer crosslinking (reticulation) services that modify the molecular structure of thermoplastic materials to improve mechanical properties, alongside R&D services in radiation chemistry and material compatibility testing.

Product overview

Ionisos is a sterilization service provider offering four main technologies (gamma, electron beam, X-ray, and ethylene oxide) across 10 sites in Europe. The company's core services include industrial sterilization for medical devices, pharmaceuticals, cosmetics, and packaging, as well as cross-linking/reticulation for polymer material enhancement. The services are delivered through a network of European facilities with quality assurance contracts and regulatory certifications. The company also provides R&D services covering radiation chemistry, material compatibility, and radiative aging.

Differentiator

Problem solved

Functional benefit

Products and services

• Gamma Sterilization Gamma radiation sterilization service that eliminates microorganisms and pathogens through ionizing radiation, providing residue-free, cold sterilization through final packaging. Used for medical devices, pharmaceuticals, cosmetics, and packaging materials.
• Electron Beam (E-beam) Sterilization Beta radiation sterilization using accelerated electron beams to decontaminate products without residue and at cold temperatures through final packaging. Used for medical devices, pharmaceuticals, and other industrial products.
• X-Ray Sterilization Sterilization service using X-ray radiation technology, providing an alternative to gamma for various medical and pharmaceutical products. Operated from a facility under construction in Henriville, France.
• Ethylene Oxide (EO/EtO) Sterilization Gas sterilization service using ethylene oxide at low temperatures (30-60°C), suitable for sensitive medical devices including those with electronic circuits, breast implants, and single-use equipment. Products are aerated post-treatment to eliminate residues.
• Polymer Crosslinking (Reticulation) Ionizing radiation treatment that improves mechanical properties (resistance and durability) of thermoplastic films and polymer materials through molecular cross-linking. Used for industrial plastics, packaging films, and semiconductor material optimization.
• Research & Development Services R&D services including radiation chemistry research, material compatibility testing, and radiative aging studies for specialized applications such as flammability treatment of linen, semiconductor material optimization, and new application development.

Quantifiable outcome

• 70+ years of industry experience in ionizing radiation treatment
• +1 more outcomes

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves11 records

Expansion highlights5 records

Others

• Nelson Labs (Sotera Health): Laboratory testing services for medical device and pharma sterilization validation, complementary rather than direct competition; shares Ionisos's customer base and offers useful read-throughs on sterilization market demand.

Direct peers

• Sterigenics (Sotera Health): Global market leader in contract sterilization using gamma, electron beam, and ethylene oxide across ~50 facilities — Ionisos's primary global direct peer across the same four-modality technology stack.
• E-BEAM Services: U.S. contract electron-beam sterilization service provider serving medical device, food, and consumer goods customers; comparable technology focus on E-beam with multi-site industrial service model.
• STERIS: Ireland-headquartered medical sterilization and infection-prevention provider offering gamma, EtO, and steam contract services; competes with Ionisos for European medical-device OEM sterilization contracts.
• BGS Beta-Gamma-Service: Germany-based radiation sterilization and polymer crosslinking service provider with gamma and electron beam capabilities; closest mid-sized European peer with overlapping customer base in medical devices and plastics.
• Reviss Services: UK-based radiation services company providing gamma sterilization and high-activity sealed source management; comparable in scale and technology overlap with Ionisos's gamma business.
• Medistri: Swiss contract sterilization provider offering gamma, E-beam, and EtO services; comparable European mid-market peer serving medical device and pharma customers similar to Ionisos's account mix.
• Gamma-Service Recycling: German provider of radiation services including isotope supply, source management, and irradiation — adjacent technology stack that overlaps with Ionisos's sealed-source/gamma sterilization activities.

Regional players

• CGN-Dasheng Electron Beam Irradiation: China's largest commercial electron beam and gamma irradiation operator; relevant comparable for scale and multi-site industrial sterilization, but primarily serves the China market rather than competing with Ionisos in Europe.
• Mitsui & Co. (Irradiation Services): Japanese conglomerate whose irradiation arm operates gamma and electron beam sterilization facilities across Asia; comparable technology and service model but operates outside Ionisos's core European footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ionisos

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 records

Funding overview

Funding rounds1 record

Investors1 record

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

M&A4 records

Investments

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

Frequently asked questions about Ionisos