STMicroelectronics China-manufactured STM32 microcontrollers begin volume production

STMicroelectronics (NYSE: STM) has started volume deliveries of STM32 microcontrollers fully manufactured in China, produced by Huahong using 40nm eNVM technology.

Rhea-AI Summary

STMicroelectronics (NYSE: STM) has started volume deliveries of STM32 microcontrollers fully manufactured in China, produced by Huahong using 40nm eNVM technology. Initial mass production covers selected STM32H7 models, with STM32H5 and STM32C5 families planned for local mass production by end of 2026.

The company says this establishes a fully localized STM32 supply chain in China—wafer manufacture, packaging, and testing—offering Chinese customers a dual-supply option with consistent global quality standards.

Positive

• Mass production began for China-made STM32H7 models in March 2026
• Fully localized STM32 supply chain covering wafer, packaging, and testing in China
• Dual supply chain option: locally manufactured MCUs and products from outside China
• Expansion plan for STM32H5 and STM32C5 mass production by end of 2026

Negative

• Initial scope limited to select STM32H7 models; broader model availability follows later in 2026
• First deliveries are ongoing to China-based customers only, limiting immediate global availability

Argus Mar 23 session

+2.59% close to close Open Argus

Details

News Market Reaction – STM

On Mar 23, the day this news came out, STM closed 2.59% above the previous close.

Data tracked by StockTitan Argus for the Mar 23 session.

Key Figures

China MCU availability window: 2026–2027 Technology node: 40 nm Partnership duration: 15 years +5 more

China MCU availability window

2026–2027

Planned STM32 product availability timeline in China

Technology node

40 nm

Embedded non-volatile memory MCU manufacturing technology node in China

Partnership duration

15 years

Length of ST’s partnership with Huahong for wafer manufacturing

LiDAR range

9 m

VL53L9CX dToF 3D LiDAR range from prior robotics vision module news

Dividend per share

$0.36

Total cash dividend for 2025 in four installments (regulatory filing)

Q2-25 net revenue

$2.77 bn

Net revenue for Q2 2025 (regulatory filing)

Q2-25 gross margin

33.5 %

Gross margin for Q2 2025 (regulatory filing)

Share buyback authorization

$1,040 million

Authorized buy-back program per August 20, 2025 6-K

Historical Context

5 past events · Latest: Mar 17

5 events

1. Mar 17

   AI power portfolio

   24h Move

   +1.0%

   Expanded 800 VDC datacenter power architectures aligned to NVIDIA reference design.

2. Mar 16

   Robotics vision module

   24h Move

   +1.0%

   Jetson-ready multi-sensor module to accelerate humanoid and advanced robotics.

3. Mar 16

   Physical AI collaboration

   24h Move

   +1.0%

   Collaboration with NVIDIA integrating STM32 and sensors into Holoscan and Isaac.

4. Mar 10

   UWB SoC launch

   24h Move

   -0.0%

   Launch of ST64UWB ultra-wideband SoCs with range and accuracy advantages.

5. Mar 09

   Silicon photonics ramp

   24h Move

   +6.9%

   High-volume production of PIC100 photonics platform for hyperscaler transceivers.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

microcontroller, wafer manufacturing, embedded non-volatile memory (eNVM), OSAT

4 terms

microcontroller technical

"STMicroelectronics China-manufactured STM32 microcontrollers begin volume production"

A microcontroller is a tiny, self-contained computer on a single chip that runs simple programs to control electronic devices — think of it as the device’s on-board brain that turns inputs (like a button press or sensor reading) into actions (like switching a motor or displaying information). It matters to investors because these chips are essential components in products from cars to appliances and industrial gear, so their availability, cost, and performance can directly affect a company’s production, margins and competitiveness.

wafer manufacturing technical

"In front-end wafer manufacturing, ST has strengthened its 15-year partnership"

Wafer manufacturing is the process of producing thin, circular slices of semiconductor material that serve as the base for computer chips and sensors. Investors watch wafer production because its speed, cost and the proportion of usable chips it yields determine chip supply, product performance and profit margins — like a bakery where ingredient quality and oven efficiency decide how many good loaves you can sell and at what price.

embedded non-volatile memory (eNVM) technical

"leveraging the identical 40 nm embedded non-volatile memory (eNVM) technology"

Embedded non-volatile memory (eNVM) is memory built directly into a device’s semiconductor chip that keeps data even when power is off, like a notebook that stays glued to a gadget. For investors, eNVM matters because it shapes a product’s features, energy efficiency, security and manufacturing cost; choices about type and capacity can affect a maker’s competitiveness, production complexity and profit margins.

OSAT technical

"local semiconductor assembly and test (OSAT) partners"

OSAT stands for outsourced semiconductor assembly and test — specialist companies that take finished silicon wafers and perform the “finishing” work: cutting, packaging and testing chips so they can be used in devices. Investors watch OSATs because their sales and profit margins track overall demand for chips and the health of the electronics supply chain; they act like toll booths that reveal upstream chip production trends, customer concentration risks, and bottlenecks that can affect many tech companies.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

STMicroelectronics China-manufactured STM32 microcontrollers begin volume production

• First deliveries of fully made-in-China STM32 microcontrollers to China-based customers are ongoing
• Localization of STM32 MCU manufacturing starts with high-performance STM32H7 series and will continue with performance-oriented, secure STM32H5 series and new entry-level STM32C5 series

March 23, 2026, China​ – STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the spectrum of electronics applications, announces the start of general-purpose STM32 microcontroller deliveries manufactured in China. The first batch of STM32 wafers fully produced in China by Huahong for ST is now being delivered to customers in China. This milestone is a major step forward in ST global supply chain strategy, with additional STM32 families, including performance-oriented, secure, and entry-level microcontroller series, planned for local volume production in 2026.

"Bringing STM32 MCUs to mass production in China is a core commitment of ST to its Chinese customers. In collaboration with Huahong, ST is bringing the very same market-leading products to customers with a secure, reliable, and resilient local microcontroller supply chain. ST will continue to respond to the needs of its Chinese customers with greater speed and precision,” said Henry Cao, Executive Vice President, Sales & Marketing, China Region, STMicroelectronics.

Through this collaboration, STMicroelectronics has become the industry's first global semiconductor company with a dual supply chain, with fully processed and manufactured 40nm MCU products in China that are exact same design and technology as those made outside China. The company has established a fully localized STM32 supply chain, covering all stages from wafer manufacturing to chip packaging and testing.

In front-end wafer manufacturing, ST has strengthened its 15-year partnership with Huahong, leveraging the identical 40 nm embedded non-volatile memory (eNVM) technology and quality control standard as in ST's global fabs, to ensure seamless compatibility of China-manufactured products with ST’s global quality standards. The packaging and testing are handled by ST's Shenzhen fab and local semiconductor assembly and test (OSAT) partners.

This manufacturing model offers customers in China a unique dual-supply choice between MCUs manufactured locally and those produced outside China, while maintaining globally consistent quality and compatibility.

Product availability (2026-2027)

First product with a China for China supply chain

STM32H7 series Mature, high-performance general-purpose series, for industrial systems smart home systems with more advanced graphical displays, personal electronics, and medical applications. Status: mass production has begun for initial product models of the H7 series, with additional product models scheduled to enter mass production by end of 2026.

Next products

STM32H5 series Performance-oriented general-purpose series boosts performance and security, with applications including pluggable optics modules in datacenters as well as a broad range of consumer and industrial systems including air conditioners, home appliances, security systems, pumps, lighting, power conversion, PC peripherals, and smartphone accessories. Status: Mass production planned by end of 2026.   STM32C5 series Entry-level microcontroller series targeting applications such as industrial automation, home appliances, motor control, digital power, medical, and consumer applications such as gaming and wearables. Status: Mass production planned by end of 2026.

About STMicroelectronics

At ST, we are 48,000 creators and makers of semiconductor technologies mastering the semiconductor supply chain with state-of-the-art manufacturing facilities. An integrated device manufacturer, we work with more than 200,000 customers and thousands of partners to design and build products, solutions, and ecosystems that address their challenges and opportunities, and the need to support a more sustainable world. Our technologies enable smarter mobility, more efficient power and energy management, and the wide-scale deployment of cloud-connected autonomous things. We are on track to be carbon neutral in all direct and indirect emissions (scopes 1 and 2), product transportation, business travel, and employee commuting emissions (our scope 3 focus), and to achieve our 100% renewable electricity sourcing goal by the end of 2027. Further information can be found at www.st.com.

For further information, please contact:

INVESTOR RELATIONS
Jérôme Ramel
EVP Corporate Development & Integrated External Communication
Tel: +41 22 929 59 20
jerome.ramel@st.com

MEDIA RELATIONS
Alexis Breton
Group VP Corporate External Communications
Tel: +33 6 59 16 79 08
alexis.breton@st.com

Attachment

• T4767S -- Mar 23 2026 -- STM32 China manufacturing_FINAL FOR PUBLICATION

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What STM32 microcontrollers did ST start manufacturing in China in March 2026 (STM)?

ST started China volume production for initial STM32H7 models in March 2026. According to the company, these are fully processed 40nm STM32H7 MCUs produced by Huahong and now being delivered to customers in China, with more models to follow.

When will China-made STM32H5 and STM32C5 series enter mass production (STM)?

Mass production for STM32H5 and STM32C5 is planned by end of 2026. According to the company, both series are scheduled for local volume production in 2026 to expand the China-manufactured STM32 lineup.

Does ST guarantee the China-made STM32 quality matches global products (STM)?

Yes, ST says China-made STM32 use identical 40nm eNVM technology and quality control standards. According to the company, manufacturing and testing follow the same design and quality criteria as products from ST's global fabs.

Which customers are receiving the first China-manufactured STM32 deliveries (STM)?

The first deliveries are going to China-based customers only. According to the company, initial wafer batches produced by Huahong are being delivered in China while broader rollout proceeds through 2026–2027.

What supply-chain change does ST claim with China-manufactured STM32 (STM)?

ST says it now has a dual supply chain for STM32 microcontrollers. According to the company, China-based fabs and local OSAT partners provide a parallel fully processed supply option alongside products made outside China.

How will China-manufactured STM32 affect product availability timelines for STM customers?

China manufacturing starts with H7 models now, with additional models and series entering mass production through 2026–2027. According to the company, this phased approach aims to increase local availability and supply resilience over time.