What STMicroelectronics makes

STMicroelectronics designs and manufactures semiconductors for the automotive industry across four broad families: microcontrollers, power devices, sensors, and application-specific integrated circuits. Its automotive microcontroller line, the Stellar family, covers vehicle motion control, body integration, and safety-critical applications from ADAS to zone computing. In February 2026 the company introduced the Stellar P3E, which adds a neural-processing unit directly to the microcontroller silicon, enabling edge AI in electronic control units without an external processor. The Stellar platform is designed for x-in-1 ECU consolidation, where multiple control functions merge onto a single device.

Silicon carbide is a second major automotive product area. ST supplies SiC MOSFETs and diodes for electric vehicle traction inverters and on-board battery chargers. The company held a supply agreement with Tesla for the Model 3 inverter, documented in investor and analyst materials; this relationship anchored ST's SiC revenue ramp in the 2020s before the broader automotive SiC market grew beyond a single customer. Power management ICs for 48-volt mild-hybrid systems and high-voltage DC/DC converters round out the electrification portfolio.

On the sensing side, ST supplies automotive MEMS accelerometers, gyroscopes, and pressure sensors for chassis, powertrain, and safety applications, as well as image sensors for driver-monitoring and occupant-detection systems. In September 2026 the company launched an infrared image sensor for in-cabin sensing, aimed at scaling affordable occupant monitoring into mid-range vehicles. The broader product catalog also includes gate drivers for motor inverters, motor drive ICs, eCall and telematics connectivity devices, and ADAS system-on-chip components built to ASIL-D functional safety requirements. ST has more than 200,000 customers worldwide but derives a substantial share of automotive revenue from a smaller set of large tier 1 and OEM customers, including Bosch, Continental, Denso, Mobileye, Vitesco Technologies, and Tesla, as documented in the company's annual reports filed with the SEC.

Financial performance

ST's automotive segment generated approximately €4.1 billion in revenue in FY2025, per the Berylls by AlixPartners Top-100 Automotive Suppliers study. That figure is down roughly 27.8% from the prior year, when the segment recorded around €5.6 billion. The decline follows a broader two-year automotive semiconductor correction: the company's total revenue across all segments fell 23.2% in FY2024 (to $13.27 billion from $17.29 billion) and a further 11.1% in FY2025 (to $11.80 billion). Operating income for FY2025 was $175 million on a U.S. GAAP basis, equivalent to a 1.5% operating margin, weighed down by $376 million in impairment, restructuring, and phase-out charges.

ST employs approximately 49,157 people globally as of December 31, 2025, down from 50,884 at end of 2024. The workforce spans manufacturing (30,546), research and development (9,461), marketing and sales (2,556), and administration. France and Italy are the two largest single-country footprints, with around 12,500 and 12,600 employees respectively; Asia accounts for roughly 17,000 additional staff. In June 2025, the company announced a restructuring program targeting up to 5,000 job reductions over three years, concentrated in France and Italy, through early retirement and attrition.

Ownership and history

STMicroelectronics was formed in June 1987 from the merger of two state-owned semiconductor companies: SGS Microelettronica of Italy and Thomson Semiconducteurs of France. The combined entity originally operated as SGS-Thomson Microelectronics and was renamed STMicroelectronics in 1998. The company went public in 1994 and is now listed on three exchanges: the New York Stock Exchange (STM), Euronext Paris (STM), and Borsa Italiana (STM). The Italian and French governments retain indirect stakes through STMicroelectronics Holding N.V., a 50/50 vehicle controlled by CDP Equity (Italy) and Bpifrance (France).

The company is incorporated in the Netherlands and headquartered in Plan-les-Ouates, a municipality adjacent to Geneva, Switzerland. Major manufacturing facilities are located in Crolles (France), Catania and Agrate Brianza (Italy), and several assembly and test sites across Morocco, the Philippines, Singapore, and Malaysia. The Crolles and Catania fabs handle front-end wafer fabrication; the Asian sites handle assembly, test, and packaging at scale.

Certifications and quality

ST claims IATF 16949:2016 certification across its manufacturing sites, company-wide since first certification in 2003, renewed on three-year cycles. The company posts individual site certificates on its public certifications page. Three recent examples: the Calamba, Philippines facility received a certificate valid from September 2024 through September 2027; the Ang Mo Kio, Singapore facility received a certificate with the same validity window; and the Bouskoura, Morocco facility was certified November 2024 through November 2027. Scope on published certificates covers design and manufacture of semiconductor products. ST also claims ISO 9001 and ISO 22301 (business continuity management) as company-wide certifications per its quality disclosures.

Automotive products are designed to functional safety standards including ISO 26262, with parts of the Stellar MCU family and ADAS SoCs rated to ASIL-D. The company publishes PPAP and APQP compliance as standard process for automotive design releases.

Known customers

ST's documented automotive customer relationships come from the company's SEC annual report disclosures, which name Bosch, Continental, Denso, Mobileye, and Vitesco Technologies among its significant automotive customers. Tesla has been documented as a SiC customer for the Model 3 inverter, confirmed through investor relations materials and Yole Group analysis. ST has stated publicly that no single customer exceeds 10% of total net revenues, which means the named customers are each substantial in absolute terms without being individually dominant. Buyers evaluating semiconductor supply-chain positioning can find context on sourcing strategy and total cost of ownership in related LightSource content.

Recent news

September 2026 -- STMicroelectronics introduced a new infrared image sensor for automotive in-cabin sensing, designed to enable cost-effective occupant monitoring for mid-range vehicle platforms (ST newsroom).

February 2026 -- ST launched the Stellar P3E automotive microcontroller, the first in its family to embed a neural-processing unit for real-time AI at the edge. The device targets x-in-1 ECU architectures, consolidating multiple vehicle control functions into a single chip (ST newsroom).

June 2025 -- The company announced a multi-year restructuring plan to reduce its global workforce by up to 5,000 positions over three years, primarily through early retirement and attrition programs in France and Italy. The program was framed as a response to a prolonged downturn in automotive and industrial end markets (Reuters).

Frequently asked questions

What does STMicroelectronics make for the automotive industry?

STMicroelectronics makes semiconductors for automotive applications including microcontrollers (the Stellar family), silicon carbide power devices for EV inverters and chargers, ADAS system-on-chip components, MEMS sensors, motor drive ICs, gate drivers, and in-cabin image sensors. The company serves both tier 1 suppliers and, increasingly, OEMs directly for electrification and ADAS programs.

Who are STMicroelectronics' major automotive customers?

Per the company's SEC annual report disclosures, major automotive customers include Bosch, Continental, Denso, Mobileye, and Vitesco Technologies. Tesla has been documented as a silicon carbide customer for the Model 3 traction inverter. ST serves more than 200,000 customers globally, with no single customer exceeding 10% of total revenue.

What is STMicroelectronics' automotive revenue?

STMicroelectronics' automotive segment generated approximately €4.1 billion in revenue in FY2025, per the Berylls by AlixPartners Top-100 study. That represents a decline of roughly 27.8% from the approximately €5.6 billion reported for FY2024, reflecting a broad correction in automotive semiconductor demand following a post-pandemic inventory build.

Where is STMicroelectronics headquartered?

STMicroelectronics is headquartered at 39 Chemin du Champ des Filles in Plan-les-Ouates, a municipality adjacent to Geneva, Switzerland. The company is incorporated in the Netherlands. Major manufacturing operations are located in France, Italy, Morocco, the Philippines, Singapore, and Malaysia.

Who owns STMicroelectronics?

STMicroelectronics is publicly listed on the New York Stock Exchange (STM), Euronext Paris, and Borsa Italiana. The Italian and French governments retain indirect minority stakes through STMicroelectronics Holding N.V., a 50/50 entity controlled by CDP Equity (Italy) and Bpifrance (France). The company was formed in 1987 from the merger of Italian and French state-owned semiconductor companies.

How many employees does STMicroelectronics have?

STMicroelectronics had approximately 49,157 employees globally as of December 31, 2025, per the company's annual report filed with the SEC. France (12,509) and Italy (12,645) are the two largest single-country workforces, followed by Asia (approximately 17,174). The company announced a multi-year restructuring in 2025 targeting reductions of up to 5,000 positions through attrition and early retirement programs.

Last verified September 2026. Is this your company? Request a correction.