Autoneum
Swiss automotive supplier specializing in lightweight acoustic and thermal-management systems for vehicles.
Last updated September 23, 2026
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Overview
Autoneum Holding AG is an internationally active Swiss automotive supplier headquartered in Winterthur. The company develops and manufactures lightweight systems that control vehicle noise, vibration, heat and airflow. Its product portfolio serves both the passenger-compartment and vehicle-underbody environments, including carpets, inner dashes, engine encapsulations, underbody shields, wheelhouse liners, heatshields, dampers and related acoustic and thermal components. Autoneum supplies a broad range of global automobile manufacturers and is positioned as one of the leading specialists in automotive acoustic and thermal management. The company’s origins lie in Rieter’s expansion into vehicle noise-control and thermal-insulation products. In 1984, Rieter acquired Unikeller AG, creating the industrial foundation for the later automotive-systems business. Rieter subsequently built international capabilities through acquisitions and partnerships in Germany, Switzerland, Portugal, the United Kingdom, the United States, Italy, Brazil and elsewhere. The Unikeller division was renamed Rieter Automotive Systems in 1995. Over the following years, the business developed a network of manufacturing, engineering and joint-venture operations, including collaborations with Japanese supplier Nihon Tokushu Toryo, commonly known as Nittoku. In 2011, Rieter decided to separate its textile-machinery and automotive activities. Rieter Automotive Systems was spun off in May of that year as an independently listed company under the Autoneum name. This separation gave Autoneum a dedicated corporate identity and capital-market structure focused on vehicle components. Since then, its growth has combined internal development, geographic expansion, joint ventures and acquisitions. The company expanded in China, Mexico, Hungary, South Korea, Russia and other markets, while also creating engineering and innovation capabilities for new vehicle technologies. Autoneum’s strategy has increasingly emphasized lightweight construction and the changing requirements of electrified vehicles. Electric vehicles eliminate or reduce some conventional sources of powertrain noise but introduce new acoustic and thermal challenges, including high-frequency motor noise, battery-related thermal requirements and the need for efficient underbody protection. Autoneum established a Competence Center New Mobility in Sunnyvale, California, in 2017 to work on acoustic and thermal-management solutions for electric and other emerging vehicle concepts. It has also pursued research partnerships with Nittoku and Toyota Boshoku. The acquisition of the Borgers automotive business, announced in January 2023 and completed with effect from April 1, 2023, expanded Autoneum’s product and manufacturing footprint and reinforced its position in sustainable acoustic and thermal management. In March 2024, Autoneum announced plans to add production capacity in the Asian growth markets through new facilities in Jilin, China, and Pune, India. According to the cited company and encyclopedia material, Autoneum had more than 70 production facilities and approximately 16,400 employees worldwide as of December 31, 2025. Its business remains focused on supplying vehicle manufacturers globally with lightweight, recyclable and performance-oriented components.
History
Autoneum developed from Rieter’s automotive component activities. The decisive early step came in 1984, when machine manufacturer Rieter acquired Unikeller AG, a company producing vehicle noise-control and thermal-insulation systems. This acquisition established the business area that would later become Autoneum. Rieter expanded the operation internationally in 1988 by acquiring or adding interests in the CHG Group in Germany, AGFK in Switzerland and Sipavel in Portugal. The business broadened its product and geographic base during the 1990s. Rieter acquired Firth Furnishings UK, a vehicle-carpet producer, in 1994, followed in 1995 by the acquisition of U.S. component manufacturer Globe Industries and its joint venture UGN with Japanese supplier Nihon Tokushu Toryo. The Unikeller division was renamed Rieter Automotive Systems in 1995. Further vehicle-component acquisitions in Italy and Brazil and a joint venture with Magee Carpet Company in the United States extended the business’s manufacturing and development network. During the 2000s, Rieter Automotive Systems developed partnerships and technical capabilities in Asia. A joint venture with Nittoku was established in China in 2003, and Rieter opened a Development and Acoustic Center in Shanghai in 2008. These steps supported the company’s expansion in a region that was becoming increasingly important to global vehicle production. In March 2011, Rieter’s board decided to separate the group’s textile and automotive activities. Rieter Automotive Systems was spun off in May 2011 and became an independently listed automotive supplier under the Autoneum name. After the separation, Autoneum continued to build its international footprint through partnerships, acquisitions and new manufacturing sites. In 2012, it agreed with Nittoku and Toyota Boshoku to collaborate on interior systems for hybrid vehicles. In 2013, it opened a plant in Ryazan, Russia, while selling Autoneum Italy as part of a capacity adjustment responding to weaker European demand. It also formed a Chinese joint venture with Nittoku and TGPM Automotive Industry Group, operating a Wuhan facility for acoustic and thermal components. A further joint venture with Korean supplier SH Global created Autoneum Korea in 2014. The company continued expanding in North America, Europe and Asia. A San Luis Potosí plant in Mexico began operations in 2016. In 2017, Autoneum opened its New Mobility competence center in Sunnyvale, California, established a new North American headquarters in Novi, Michigan, and expanded research cooperation with Nittoku and Toyota Boshoku. New Chinese plants in Yantai, Changsha, Pinghu and Shenyang Tiexi were added during 2017 and 2018, while a plant in Komárom, Hungary, began producing lightweight acoustic and thermal-management components in 2018. A significant later development was the acquisition of the Borgers automotive business. Announced in January 2023, the transaction closed after antitrust approvals with effect from April 1, 2023. It strengthened Autoneum’s global position in acoustic and thermal management and added capabilities associated with the acquired business. In March 2024, Autoneum announced further Asian capacity expansion through planned facilities in Jilin, China, and Pune, India. The company’s current direction combines global supply to vehicle manufacturers with lightweighting, sustainability and technology development for electrified vehicles.
- 2024
Asian capacity expansion announced
[1]Autoneum announced planned facilities in Jilin, China, and Pune, India, to expand production in Asian growth markets.
- 2023
Borgers automotive acquisition closes
[1]Autoneum completed its acquisition of the Borgers automotive business effective April 1 after receiving antitrust approvals.
- 2018
Komárom plant opens
[1]A Hungarian production facility began manufacturing lightweight components for vehicle acoustic and thermal management.
- 2017
New Mobility competence center established
[1]Autoneum opened a Sunnyvale center dedicated in part to acoustic and thermal solutions for electric vehicles and other emerging mobility technologies.
- 2013
Expansion in Russia and China
[1]Autoneum opened a plant in Ryazan and formed a Wuhan joint venture with Nittoku and TGPM for acoustic and thermal-management components.
- 2011
Autoneum is spun off from Rieter
[1]Rieter Automotive Systems was separated from Rieter and became the independently listed company Autoneum.
- 2003
Chinese joint venture with Nittoku
[1]Rieter Automotive Systems established a Chinese joint venture with Nittoku, strengthening its Asian production and development network.
- 1995
Automotive division renamed Rieter Automotive Systems
[1]Following the Globe Industries acquisition and related UGN interests, the Unikeller division adopted the Rieter Automotive Systems name.
- 1988
International expansion begins
[1]Rieter expanded the automotive business through acquisitions or investments involving CHG Group, AGFK and Sipavel.
- 1984
Rieter acquires Unikeller AG
[1]Rieter’s acquisition of Unikeller AG established the automotive acoustic and thermal-insulation business that ultimately developed into Autoneum.
Products and positioning
A global Tier 1 automotive supplier focused on lightweight acoustic and thermal management, with expertise spanning vehicle interiors, underbody systems, powertrain protection and emerging electric-vehicle applications.
Interior acoustic and thermal systems
Carpet systems
Molded and formed vehicle carpet systems provide cabin finish while contributing to sound absorption, thermal insulation and weight reduction. They are integrated with vehicle floor architectures and can be engineered for different platforms, materials and manufacturing requirements.
Interior acoustic insulation
Inner dashes
Inner-dash systems sit between the passenger compartment and the engine bay. They help reduce the transmission of powertrain and road noise into the cabin while also providing thermal separation and packaging around dashboard and firewall structures.
Powertrain acoustic and thermal management
Engine encapsulations
Engine encapsulations surround or cover selected powertrain areas to manage heat and reduce radiated noise. Their lightweight construction can support faster warm-up, improved acoustic comfort and more controlled thermal behavior, subject to the requirements of each vehicle platform.
Exterior acoustic and thermal systems
Underbody systems
Underbody components protect vehicle structures and help manage airflow, noise and heat beneath the vehicle. They can combine aerodynamic, acoustic and thermal functions while supporting lightweighting and, in electrified vehicles, the protection and thermal requirements of battery-related architectures.
Wheelhouse acoustic protection
Wheelhouse outer liners
Wheelhouse outer liners help reduce tire and road noise and protect surrounding vehicle structures from water, dirt and stone impact. Autoneum’s lightweight solutions are designed to meet the packaging and durability demands of modern passenger vehicles.
Thermal management
Heatshields
Heatshields limit the transfer of heat from exhaust, powertrain and other hot components to nearby vehicle systems and passenger areas. They are engineered around vehicle-specific temperature, space, durability and weight constraints.
Vibration control
Dampers
Dampers address structure-borne vibration and related noise in vehicle bodies and components. They complement insulation products by reducing resonances and improving perceived refinement in passenger compartments and other vehicle zones.
Controversies
2015
German automotive supplier price-fixing case
The German Federal Cartel Office fined five automotive suppliers a combined €75 million for illegal price coordination during the period from 2005 to 2013. Autoneum’s German subsidiary was identified as one of the affected companies and paid a €29.5 million fine.
Brand decisions
2024
Expand production in China and IndiaStrategyBackground
Autoneum identified China and India as Asian growth markets requiring additional local production capacity.
Action taken
The company announced plans for new plants in Jilin, China, and Pune, India.
Aftermath
The planned facilities were intended to increase Autoneum’s regional manufacturing presence and support customers in Asian markets.
2023
Acquire the Borgers automotive businessM&ABackground
Autoneum sought to expand its global acoustic and thermal-management position and broaden its industrial footprint.
Action taken
The acquisition was announced in January and completed effective April 1, 2023, after required antitrust approvals.
Aftermath
The transaction expanded Autoneum’s global market position and added the acquired automotive business to its operations.
2017
Invest in new-mobility developmentStrategyBackground
Electrified vehicles create different acoustic and thermal-management requirements from conventional powertrains.
Action taken
Autoneum established the Competence Center New Mobility in Sunnyvale and expanded research cooperation with Nittoku and Toyota Boshoku.
Aftermath
The company strengthened its development platform for electric-vehicle and other emerging mobility applications.
2013
Adjust European production capacityStrategyBackground
Autoneum cited declining demand in the European market while continuing to expand in selected international locations.
Action taken
Autoneum Italy, including plants in Desio, Pignataro, Santhià and Vicolungo, was sold.
Aftermath
The move aligned the company’s European production footprint with market conditions while it expanded elsewhere.
2011
Separate the automotive business from RieterStrategyBackground
Rieter’s board decided to divide the group’s textile-machinery and automotive activities.
Action taken
The Rieter Automotive Systems division was spun off in May 2011 and established as the independently listed Autoneum.
Aftermath
The separation created a dedicated global automotive-supplier company focused on acoustic and thermal management.
Recent events
- 2024
Autoneum announces new production capacity in China and India[1]
Other
The company announced plans to expand in Asian growth markets through new facilities in Jilin, China, and Pune, India.
- 2023
Autoneum announces acquisition of Borgers automotive business[1]
M&A
Autoneum announced the purchase of the Borgers automotive business. The transaction received the required antitrust approvals and took effect on April 1, 2023.
- 2017
Autoneum opens Competence Center New Mobility in Sunnyvale[1]
Product launch
Autoneum established a California-based development center to work on acoustic and thermal-management components for electric and other new-mobility vehicles.
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