Stmicroelectronics Earnings Call: AI Bets vs Margin Drag

Stmicroelectronics N.V. ((STM)) has held its Q1 earnings call. Read on for the main highlights of the call.

Stmicroelectronics struck an optimistic tone in its latest earnings call, highlighting strong year‑over‑year growth, robust bookings and a richer opportunity pipeline in data centers, AI and sensors. Management acknowledged near‑term pressure on margins and cash from restructuring, acquisitions and fab transitions, but reiterated confidence that profitability should improve steadily into 2026 and more materially from 2027 onward.

Quarterly Revenue and Guidance

ST reported Q1 net revenues of $3.1 billion, including about $40 million from the newly acquired NXP MEMS business, setting a solid base despite sequential softness. For Q2, the company guided revenues of $3.45 billion plus or minus 350 basis points, implying roughly 11.6% sequential and 24.9% year‑over‑year growth, and signaled full‑year 2026 revenues should rise at a double‑digit pace.

Broad-Based Year-over-Year Segment Growth

Year‑over‑year, ST delivered strong growth across most segments, with Analog/MEMS & Sensors up 23.2%, Embedded Processing up 31.3% and RF & Optical Communication up 33.9%, while Power & Discrete slipped 1.8%. By end market, Communication Equipment & Computer Peripherals jumped 41%, Industrial grew 26%, Personal Electronics advanced 21% and Automotive rose 15%, underscoring resilient demand even as the macro remains mixed.

Data Center and AI as Growth Engines

Management doubled down on the data center and AI opportunity, reaffirming revenue targets “nicely above” $500 million in 2026 and “well above” $1 billion in 2027. The company cited multiple design wins in silicon, silicon carbide power and photonics, along with an expanded multiyear multi‑billion‑dollar engagement with AWS to support cloud and AI infrastructure build‑outs.

Improving Profitability and Q2 Margin Outlook

Q1 gross margin came in at 33.8%, or 34.1% excluding purchase‑price accounting, representing a 40‑basis‑point gain year‑over‑year despite restructuring headwinds. For Q2, ST guided gross margin around 34.8% including about 100 basis points of unused‑capacity charges, or roughly 35.2% on a non‑GAAP basis, and reiterated expectations for sequential gross‑margin improvement through the second half of 2026.

Operational Wins and Production Milestones

Operationally, ST began high‑volume production of its PIC100 silicon photonics platform, a key enabler for next‑generation optical links in data centers. The company also delivered its first batch of STM32 wafers fully manufactured in China and secured design wins in 800‑volt DC AI data‑center power conversion, while expanding its 800‑volt portfolio in partnership with NVIDIA.

Bookings Strength and Market Position

Booking momentum remained robust, with the book‑to‑bill ratio well above one across end markets, signaling healthy future revenue visibility. ST highlighted design wins in automotive electrification and ADAS sensors, industrial robotics and automation, LEO satellites and personal electronics, and noted it has been ranked number one globally for general‑purpose microcontrollers for the fifth straight year by Omdia.

Strategic NXP MEMS Acquisition

In February, ST closed the acquisition of NXP’s MEMS sensor business, adding complementary accelerometer and six‑axis capabilities that deepen its automotive sensor offering. The acquired unit contributed about $40 million in Q1 revenue and is expected to enhance ST’s competitive position in safety‑critical and high‑reliability applications as the automotive sector transitions to smarter, more connected platforms.

Progress on Sustainability Targets

ST issued its latest integrated sustainability report and said it remains on track to achieve carbon neutrality across Scopes 1 and 2 and selected Scope 3 categories by 2027. The company expects to source 86% of its electricity from renewable sources in 2025 and aims to reach 100% renewable electricity by 2027, aligning its manufacturing growth with stricter environmental goals.

Sequential Softness Across Several Segments

Despite strong annual comparisons, Q1 showed sequential declines across key businesses, with Automotive down 10%, Personal Electronics down 14% and Analog/MEMS & Sensors down 9.1%. Power & Discrete slipped 5.4%, Embedded Processing 4% and RF & Optical 9%, highlighting near‑term demand normalization and inventory digestion after prior strength.

Restructuring and One-Offs Pressure Profitability

Q1 operating income was $70 million, reflecting $71 million of impairment and restructuring charges plus $30 million of purchase‑price accounting effects that depressed reported profitability. On a non‑GAAP basis, operating income reached $171 million, translating to a 5.5% operating margin, while net income was $37 million and diluted EPS stood at $0.04 versus $0.06 a year earlier.

Free Cash Flow Hit by Acquisition Spend

Free cash flow turned sharply negative in Q1 at minus $723 million compared with a positive $30 million in the prior‑year period. The swing was largely driven by an $895 million cash outflow tied to the NXP MEMS acquisition, which management framed as a strategic, front‑loaded investment intended to expand the company’s sensor portfolio and long‑term revenue base.

Higher Operating Expense Trajectory

ST now expects like‑for‑like net operating expenses in 2026 to rise by a mid‑ to high‑single‑digit percentage year‑over‑year, versus its prior low‑single‑digit outlook, reflecting accelerated investments in growth opportunities. Including the impact of the NXP acquisition and foreign‑exchange effects, OpEx is projected to increase at a low double‑digit rate, with Q2 non‑GAAP OpEx guided to $950 million to $960 million.

Manufacturing Transitions Drag on Efficiency

Ongoing manufacturing reshaping weighed on Q1 gross margin by roughly 50 basis points and is expected to exert a similar temporary drag throughout the year. The company is transitioning from 200‑millimeter to 300‑millimeter wafers and from six‑inch to eight‑inch silicon‑carbide lines, which is currently creating suboptimal fab efficiency and timing constraints as new capacity is qualified.

Unused Capacity Costs and Lower Reservation Fees

Unused‑capacity charges remain a reality and, while reduced, are not expected to fully disappear even in 2026, limiting near‑term margin upside. In parallel, ST anticipates a roughly $140 million year‑over‑year decline in capacity‑reservation revenue, creating a headwind to reported sales as customers shift toward more normalized ordering patterns.

Inventory and Working Capital Management

Inventory ticked up slightly to $3.17 billion, with days of inventory rising to 140 from 130 sequentially, though still down from 167 days a year ago. Management said it is actively working down stock levels in distribution channels, but acknowledged that on‑balance‑sheet inventories increased marginally as it prepares for upcoming ramps in AI, data‑center and automotive programs.

Near-Term Margin and Capacity Timing Risks

ST cautioned that the ramp of new AI and photonics volumes is constrained by qualification timelines and the pace of capacity build‑outs, creating timing risk for margins. The company expects the most meaningful manufacturing benefits from its transitions to materialize toward the end of 2027 and into 2028, suggesting that near‑term margin expansion may be more gradual than topline growth.

Forward-Looking Guidance and Longer-Term Targets

Looking ahead, ST reaffirmed Q2 revenue guidance of $3.45 billion plus or minus 350 basis points and gross margin around 34.8% including unused‑capacity charges, with non‑GAAP OpEx of $950 million to $960 million. For the longer term, management reiterated data‑center revenue ambitions above $500 million in 2026 and well above $1 billion in 2027, a path of sequential gross‑margin improvement despite about 50 basis points of reshaping costs this year and a long‑range goal of achieving more than 40% gross margin once quarterly revenue exceeds roughly $4 billion.

ST’s latest earnings call painted a picture of a company leaning into secular growth themes while navigating the cost and complexity of major manufacturing and portfolio shifts. Investors will need to weigh the near‑term drag from higher OpEx, acquisition outlays and fab transitions against the clear momentum in AI, data centers, automotive and industrial markets that could support stronger margins and cash generation later in the decade.