onsemi (ON) Q2 2025 earnings review
Revenue Stabilizes and Guides Higher, But Margin Recovery Hinges on Utilization
Onsemi reported Q2 results indicating a cyclical bottom, with revenue of $1.47B beating the midpoint of guidance and Q3 guidance for $1.515B (at midpoint) implying modest sequential growth. This supports management's narrative of market stabilization, with the key Automotive segment guided to grow in Q3 after troughing. However, profitability remains severely compressed. Non-GAAP Gross Margin was 37.6% and is guided flat for Q3, weighed down by a significant 900 basis point headwind from low factory utilization. While the AI Data Center business continues to be a strong secular driver, the path to meaningful margin recovery is entirely dependent on a broader volume rebound.
🐂 Bull Case
Q2 revenue ticked up sequentially and Q3 guidance calls for further growth across all end markets (Auto, Industrial, Other), signaling the worst of the downturn is likely over.
The key automotive segment, which troughed in Q2 (-4% QoQ), is guided to return to growth in Q3, supported by EV ramps in China and new platform wins.
The AI data center business nearly doubled year-over-year for the second consecutive quarter, providing a powerful secular growth driver independent of the broader cyclical recovery.
🐻 Bear Case
Non-GAAP gross margin is stuck in the high 30s, weighed down by 900 basis points of under-absorption charges from low factory utilization. A meaningful margin recovery requires a significant volume increase that is not yet visible.
Management plans to exit or reposition business representing ~5% of 2025 revenue in 2026. This strategic pruning, particularly in the Intelligent Sensing Group, will create a headwind to top-line growth during a potential recovery.
⚖️ Verdict: ⚪
Mixed. The evidence of a revenue bottom is compelling, with Q3 guidance confirming a sequential turn. However, the quality of the business is pressured, with margins compressed by underutilization and free cash flow weakening. The bull case requires a sustained volume recovery to drive operating leverage, which remains uncertain in the current macro environment.
Key Themes
Gross Margin Stagnates Under Utilization Pressure
Non-GAAP gross margin fell to 37.6% from 40.0% last quarter and is guided flat for Q3. Management explicitly stated this includes a 900 basis point headwind from underutilization charges, with factories running at just 68% of their newly reduced capacity. This indicates that until revenue recovers significantly, margins will remain well below the mid-40s level achieved just two quarters ago, limiting earnings power.
AI Data Center Emerges as Key Growth Driver
For the second straight quarter, management highlighted that AI data center revenue nearly doubled year-over-year. The company is actively capitalizing on this trend by engaging with leading XPU providers on smart power stages and collaborating with market leaders like NVIDIA on next-generation 800-volt power architectures. This provides a strong secular growth narrative amid the cyclical weakness in other areas.
Automotive Segment Troughs and Turns to Growth
After declining 4% sequentially in Q2, management explicitly guided for the Automotive segment to return to growth in Q3. This reversal is supported by continued EV ramps in China, a key growth market, and an expanded collaboration with Schaeffler for a global OEM's PHEV platform. This signals a crucial inflection point for the company's largest end market.
Portfolio Pruning Creates 2026 Revenue Headwind
Management disclosed a plan to discontinue business representing approximately 5% of 2025 revenue in 2026. This includes exiting legacy products and repositioning the Intelligent Sensing Group (ISG). This strategic move, aimed at improving margin quality, will create a significant top-line headwind. The ISG segment was the weakest performer in Q2, with revenue declining 8% sequentially, underscoring the challenges in that portfolio.
Cost Restructuring Delivers Operating Leverage
The benefits of restructuring actions taken in Q1 are becoming visible. Non-GAAP operating expenses decreased by $17 million sequentially to $298 million. Management expects to realize the full benefits in Q3, with guidance for OpEx to fall further to a midpoint of $287.5 million. This disciplined cost management creates operating leverage as revenue begins to recover.
Free Cash Flow Weakens Significantly
Free cash flow fell sharply to $106 million in Q2 from $455 million in Q1. While management attributed this to the timing of working capital, the significant drop breaks a trend of strong cash generation. Although the company remains on track for its full-year FCF margin target of 25%, the quarterly lumpiness introduces a point of risk to monitor.
Navigating a Cyclical Bottom
CEO Hassane El-Khoury stated, "We are seeing signs of stabilization across our end markets." This sentiment is backed by Q3 guidance, which calls for sequential growth in all three end markets (Automotive, Industrial, Other) for the first time in several quarters. While not calling for a sharp V-shaped recovery, the data suggests the business has navigated the trough and is entering a period of stabilization.
Other KPIs
A clear divergence in performance. The Power Solutions Group (PSG) led the recovery with a strong 8% sequential rebound. However, the Analog & Mixed-Signal Group (AMG) and particularly the Intelligent Sensing Group (ISG) continued to contract, highlighting that the stabilization is not yet broad-based across the entire portfolio.
The company repurchased an additional $300 million of stock, bringing the year-to-date return of free cash flow to shareholders to 107%. This aggressive capital return posture signals management's confidence in the long-term cash generation capabilities of the business despite the near-term downturn.
Stable. Excluding strategic bridge inventory for fab transitions (87 days), the company's core inventory is at a healthy 121 days. Distribution channel inventory also remained stable at 10.8 weeks, well within the 9-11 week target range. This indicates disciplined supply management and reduces the risk of a future inventory overhang.
Guidance
Reversing. The midpoint of $1.515B implies 3.1% sequential growth, confirming the stabilization trend. However, it still represents a YoY decline of ~14%, a deceleration from the 15% YoY decline in Q2, showing the recovery is gradual.
Stable. The midpoint of 37.5% is essentially flat with Q2's 37.6%. This indicates that while the steep margin decline has stopped, there is no near-term catalyst for improvement as low factory utilization continues to be a 900 basis point drag.
Reversing. The midpoint of $0.59 implies 11% sequential growth, a clear reversal from the prior trend of steep declines. The improvement is driven by modest revenue growth and lower operating expenses, demonstrating positive operating leverage.
Key Questions
Path to Margin Recovery
With gross margin guidance including a 900 basis point headwind from underutilization, what level of quarterly revenue is needed to fully absorb these charges and return to a 40%+ gross margin profile?
Details on 2026 Portfolio Exits
Can you provide more color on the margin and growth profile of the ~5% of revenue being exited in 2026? How accretive will this business rationalization be to the corporate average?
Sizing the AI Data Center Business
You've highlighted that AI data center revenue nearly doubled YoY for the second consecutive quarter. Can you help size this business for us, even broadly, and clarify its contribution to the 'Other' segment's growth?
Automotive Regional Demand
Given that the Automotive segment is guided to grow in Q3 after troughing, what specific trends are you seeing from customers in North America and Europe, where weakness was previously concentrated?