STMicroelectronics: Europe’s Chipmaker and the Cycle

Almost every electronic device — your car, your phone, your appliances — contains chips, and a great many of them come from STMicroelectronics. As Europe’s semiconductor champion, ST both designs and builds its own chips, a strategy that brings great strength and great cost. This article explains the integrated-chipmaker model, why semiconductors are so brutally cyclical, and why ST’s bet on electric-vehicle chips matters.

ST also stands out as one of the few places where Europe competes at genuine scale in the chip industry that underpins all modern technology. In a field where leadership is concentrated in the United States and Asia, its position carries strategic weight far beyond its own balance sheet, making its fortunes a matter of interest to European policymakers as well as investors.

What is STMicroelectronics and what does it make?

STMicroelectronics (ST) is a Franco-Italian multinational and one of the world’s largest semiconductor manufacturers — the maker of the microchips that power electronic devices. Its products include microcontrollers (tiny computers embedded in appliances, cars and gadgets), power and analog chips (which manage electricity and real-world signals), sensors such as the MEMS motion sensors in smartphones, and increasingly silicon carbide chips for electric vehicles.

Formed in 1987 from the merger of French and Italian state electronics firms, ST generated $13.3 billion in revenue in 2024 and is Europe’s largest chipmaker. Its chips go into an enormous range of products across four main markets: automotive, industrial, personal electronics (like smartphones), and communications equipment and computers — making it a critical, if largely invisible, supplier to the modern economy.

ST serves major customers including carmakers and consumer-electronics giants; its chips are found, for example, in Apple devices and in electric vehicles worldwide. As a European semiconductor leader in an industry dominated by American and Asian firms, it holds real strategic importance for the continent’s technological independence.

What is an integrated device manufacturer?

STMicroelectronics is an ‘integrated device manufacturer’ (IDM), meaning it both designs its chips and manufactures them in its own factories — unlike many chip companies that either only design chips (and outsource production) or only manufacture them for others. This vertically integrated model, controlling the whole process from design to finished chip, is central to ST’s identity.

The IDM approach brings important advantages. Owning its factories (called ‘fabs’) gives ST control over its manufacturing, its quality, and its supply — valuable in industries like automotive, where reliability and secure supply are paramount, and during shortages, when companies without their own factories can be left waiting. It also lets ST tightly optimise its chip designs for its own manufacturing processes, and to develop specialised technologies like silicon carbide in-house.

But the model is enormously capital-intensive. Semiconductor factories cost billions of euros to build and equip, and must be constantly upgraded as technology advances, so ST must invest heavily year after year just to stay competitive. This huge fixed-cost base is a defining feature of the business: it rewards ST richly when its fabs run full during booms, but punishes it severely when demand falls and expensive factories sit underused.

Why are semiconductors so cyclical?

The semiconductor industry is famously cyclical — swinging between booms of shortage and busts of glut — and 2024 was a bust for ST, with revenue falling 23% as demand for industrial and automotive chips slumped and customers worked through excess inventory. Understanding this cyclicality is essential to understanding the business.

The cycle arises because chip demand rises and falls with the broader economy and with customers’ inventory behaviour, while chip supply takes years to adjust (new factories take a long time to build). When demand booms, shortages appear and chipmakers rush to expand; by the time new capacity arrives, demand may have cooled, creating a glut. Customers amplify this by over-ordering during shortages and then slashing orders and running down stockpiles during slowdowns — exactly what battered ST’s industrial and automotive sales in 2024.

ST’s heavy fixed costs make it especially exposed to this cycle. When its fabs run full during a boom, profits soar; when demand falls and factories run below capacity, those same fixed costs crush margins. This is why ST’s revenue could swing so violently, and why it responded to the downturn by cutting costs, reshaping its manufacturing, and postponing its long-term revenue ambitions. Riding the cycle — investing for the long term while surviving the downturns — is the central challenge of the semiconductor business.

Why is silicon carbide so important to ST’s future?

Silicon carbide (SiC) — an advanced chip material that handles high power and heat far better than ordinary silicon — is one of ST’s most important growth bets, because it is key to electric vehicles. SiC chips make EV powertrains more efficient, extending range and speeding charging, and ST is a world leader in developing and manufacturing them.

This positions ST at the heart of the automotive electrification wave. As the car industry shifts to electric power, demand for SiC chips is set to grow enormously, and ST has invested heavily to lead this market, winning designs with major carmakers — including strong momentum with Chinese EV makers, the world’s fastest-growing electric-vehicle market. Its in-house IDM model lets it master this specialised, hard-to-make technology end to end.

Silicon carbide illustrates how ST aims to ride powerful long-term trends — electrification, and the growing electronic content of cars and industry — even through short-term cyclical downturns. The 2024 slump hurt, and ST pushed back some ambitious targets, but the underlying direction — more chips in more electric, connected, automated things — remains firmly in its favour, and SiC is a central part of that long-term story.

How is STMicroelectronics owned and governed?

STMicroelectronics has an unusual ownership structure reflecting its Franco-Italian origins: the French and Italian governments, through a jointly-held holding company, together own a significant stake — around a quarter of the company — while the rest trades publicly. This makes ST a partly state-anchored European champion rather than a purely private firm.

This binational, partly-public ownership gives ST stability and reflects its strategic importance to both France and Italy, which value having a major semiconductor maker on European soil — all the more so amid global concern about chip supply and technological sovereignty. The two states’ involvement, echoing the strategic-ownership theme across the France Company Stories hub, supports ST’s heavy long-term investment and anchors it in Europe, though balancing two governments’ interests alongside public shareholders adds its own complexity. Led by CEO Jean-Marc Chery, ST operates as a global commercial company while retaining this distinctive European, partly-sovereign character.

Why does chip sovereignty matter for ST?

Semiconductors have become one of the most strategically contested technologies on earth, and ST’s position as a major European chipmaker gives it outsized importance in the drive for ‘chip sovereignty’ — the ambition of regions to secure their own supply of critical chips. The global chip shortages of recent years, which idled car factories worldwide, exposed how dependent economies had become on a handful of overseas suppliers, especially in Asia.

In response, Europe launched initiatives like the European Chips Act to boost domestic semiconductor manufacturing, and ST is a central beneficiary and participant. It has expanded its French and Italian factories and pursued major new fabrication projects, sometimes with public support, to increase Europe’s chipmaking capacity. This alignment of ST’s commercial expansion with a strategic public priority is a genuine advantage: it can attract government backing for its costly investments, and its role in securing Europe’s chip supply reinforces the political will to keep a strong semiconductor industry on the continent. In an era where chips are treated as strategic assets akin to oil, being Europe’s leading chipmaker is a position of lasting value, even through the industry’s punishing cycles.

What are the risks facing STMicroelectronics?

ST’s greatest risk is the semiconductor cycle itself: sharp downturns like 2024’s can slash revenue and profits quickly, and the timing of recovery is hard to predict. Its heavy, ongoing capital investment must be sustained even through downturns to stay competitive, straining cash flow when demand is weak. Intense global competition, especially from larger American and Asian chipmakers, is relentless.

ST is also exposed to geopolitical risk — trade tensions, export controls, and the strategic rivalry over semiconductors between the US, China and Europe — and to its significant dependence on the automotive and industrial markets and on China. Executing its silicon-carbide and technology roadmaps, managing its costly manufacturing footprint efficiently, and navigating the shift to electric vehicles all carry execution risk. Currency movements, given it reports in dollars, add further volatility.

What can founders learn from STMicroelectronics?

ST illustrates the economics of a cyclical, capital-intensive manufacturing business — one where owning your factories brings control and advantage but also enormous fixed costs that magnify both booms and busts. It shows why such businesses must be judged over a full cycle, why deep pockets and long-term commitment are essential, and how vertical integration (the IDM model) can be a genuine strategic strength in industries where supply security and specialised technology matter.

It also demonstrates the value of positioning for powerful long-term trends — like electrification through silicon carbide — while weathering short-term volatility. For anyone studying the France Company Stories hub, STMicroelectronics is the case study in the semiconductor business and cyclical, heavy industry — proof that a European champion can lead in one of the world’s most demanding, strategic technologies, if it can endure the cycle. Explore the software, IT services and cloud champions around it across the Software & Tech pillar.

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