ON Semiconductor (ON) Q2 2025: AI Data Center Revenue Doubles, Power Mix Drives Margin Reset
ON Semiconductor’s Q2 2025 marked a turning point as AI data center revenue doubled year-over-year, offsetting ongoing auto and industrial softness. The company’s transformation—emphasizing intelligent power and strategic exits from legacy segments—has begun to show operational leverage, though underutilization and portfolio rationalization will weigh through 2025. Management’s disciplined approach and new product momentum set the stage for margin recovery as markets stabilize and secular tailwinds take hold.
Summary
- AI Data Center Acceleration: ON’s AI data center business doubled YoY, validating its power-centric strategy.
- Portfolio Rationalization Impact: Strategic exits of legacy and low-margin products are reshaping the revenue base.
- Margin Recovery Hinges on Utilization: Underutilization remains the key drag, with margin expansion tied to volume ramp and product mix shift.
Performance Analysis
ON Semiconductor delivered Q2 revenue above guidance midpoint, with automotive, industrial, and AI data center businesses each playing distinct roles in the quarter’s outcome. Automotive revenue declined 4% sequentially, with ongoing weakness in North America and Europe partially offset by strong China EV ramps, particularly on Xiaomi platforms using ON’s silicon carbide (SiC) solutions. Industrial revenue rose 2% QoQ, but traditional segments remain sluggish. The “other” category—driven by AI data center—was a standout, nearly doubling YoY and up 16% sequentially, though it remains a small share of overall sales.
Gross margin held at 37.6%, above guidance, reflecting early benefits from cost actions and portfolio pruning, but still pressured by 900 basis points of underutilization charges. Operating expenses declined sharply as restructuring and capacity cuts took hold, and ON returned 107% of YTD free cash flow to shareholders via buybacks. Inventory remains elevated but is expected to decline in the second half as SiC bridge inventory is consumed and fab transitions complete. Management’s full-year free cash flow target of 25% margin remains intact, but near-term cash flow is lumpy due to working capital timing.
- AI Data Center Drives Mix Shift: “Other” revenue, powered by AI, is ON’s fastest-growing area, but from a low base.
- Automotive Recovery Lags Peers: ON’s auto business is still 30% off prior peaks, reflecting both market and portfolio headwinds.
- Structural Cost Actions Materialize: OpEx fell $17M QoQ, highlighting early returns from restructuring, with further benefits expected in Q3.
Overall, ON’s quarter reflected stabilization in end-markets, with secular growth in AI and China EV offsetting legacy and regional auto/industrial headwinds. Margin and cash flow recovery now depend on utilization and the pace of portfolio transition.
Executive Commentary
"We are enabling next-generation power architectures that drive efficiency and performance at scale through collaboration with market leaders like NVIDIA to accelerate the shift to 800 volt DC power architecture. We remain focused on making strategic investments to extend our competitive edge and deepen customer relationships to build long-term value."
Hassan El-Khoury, President and CEO
"We have progressively rationalized our portfolio and manufacturing footprint to expand gross and operating margins at scale. These efforts will continue in future quarters, and we are committed to extracting value through our FABRIGHT initiative."
Tad Tran, Chief Financial Officer
Strategic Positioning
1. AI Data Center as a Secular Growth Lever
ON’s AI data center business doubled YoY for a second consecutive quarter, validating its focus on intelligent power semiconductors. The company is collaborating with leading XPU providers and sampling advanced smart power stages, positioning itself as a critical enabler of next-gen AI infrastructure where power delivery, not compute, is the bottleneck. This segment, while still a small share, is ON’s clearest path to outsize growth and margin expansion.
2. Portfolio Rationalization and Product Mix Shift
ON is actively exiting legacy and non-core products, including repositioning its Intelligent Sensing Group (ISG) from low-value “human vision” to higher-value machine vision and ADAS (Advanced Driver Assistance Systems). Management expects 5% of 2025 revenue to not repeat in 2026, a $50-100M headwind, but sees this as margin-accretive long-term as the company focuses on differentiated, higher-margin segments.
3. Manufacturing Footprint and Utilization Discipline
Restructuring and fab right-sizing are central to ON’s model reset. Utilization is now 68% (post-impairment), with full utilization redefined at 92% on the reduced footprint. Each point of utilization adds 25-30 basis points of gross margin, and the company expects 900bps of margin upside as volumes recover. The East Fishkill facility is now shipping power products and ramping Treo, ON’s modular SoC platform, which has seen its design funnel double QoQ.
4. Capital Allocation and Shareholder Returns
ON is returning all free cash flow to shareholders, with $300M in Q2 buybacks and a YTD payout of 107% of free cash flow. CapEx remains disciplined at 5% of revenue, with future investments targeted at next-generation power and sensing technologies, not legacy capacity.
5. China and EV Platform Differentiation
China remains ON’s fastest-growing auto market, with 23% sequential growth in Q2, driven by SiC design wins on new EV platforms. The company’s focus on efficiency and range—rather than volume—has insulated it from some regional volatility, and management expects share gains to continue as OEMs redesign for electrification and emissions targets.
Key Considerations
This quarter marks a clear inflection in ON’s transformation, with secular AI and EV tailwinds counterbalancing cyclical and portfolio-driven headwinds. The company’s operational discipline and focus on high-value segments are evident, but margin and cash flow recovery will be paced by utilization and the timing of legacy exits.
Key Considerations:
- AI Data Center Traction: Growth is robust but from a small base; scaling this business is critical for future upside.
- Automotive Mix and Regional Exposure: China strength offsets U.S./EU weakness, but ON’s auto recovery lags peers due to mix and portfolio shifts.
- Gross Margin Leverage: Full recovery to 53% target depends on utilization ramp, portfolio mix, and completion of FabRight initiatives.
- Portfolio Pruning: The 5% revenue exit in 2026 will be margin-neutral near term but accretive longer term; execution risk remains in transitioning revenue base.
- Inventory and Cash Flow Dynamics: Inventory remains elevated due to SiC bridge stock; working capital and inventory burn are key to hitting cash flow targets.
Risks
ON faces ongoing risks from underutilization, delayed auto and industrial recovery, and the execution complexity of portfolio exits. Tariff and regulatory uncertainty remain, especially for global auto and China exposure, though ON’s diversified manufacturing footprint is a mitigant. The margin recovery thesis is highly sensitive to volume and mix ramp in secular growth areas, especially AI and EV.
Forward Outlook
For Q3 2025, ON guided to:
- Revenue of $1.465B to $1.565B
- Non-GAAP gross margin of 36.5% to 38.5%
- Non-GAAP OpEx of $280M to $295M
- EPS of $0.54 to $0.64
For full-year 2025, management reiterated:
- 25% free cash flow margin target
- CapEx at 5% of revenue
Management highlighted:
- All segments (auto, industrial, other) expected up in Q3, with “other” (AI) leading growth
- Further OpEx leverage and inventory reduction anticipated in H2
Takeaways
ON’s Q2 2025 results underscore a company in transition, balancing cyclical stabilization with secular growth bets and a margin reset. Investors should weigh the timing and scale of AI and EV ramps against the drag from legacy exits and utilization headwinds.
- AI and Power Mix Are the Growth Engine: Early wins in AI data center and China EV validate ON’s strategic focus, but scaling these businesses is essential for margin and revenue acceleration.
- Portfolio Rationalization Creates Near-Term Drag: The 5% revenue exit will weigh on top-line growth through 2026 but should improve margin quality over time.
- Utilization Is the Margin Key: Watch for signs of demand recovery, especially in auto/industrial, as the primary lever for gross margin and earnings upside.
Conclusion
ON Semiconductor’s Q2 marks visible progress in its transformation, with secular growth in AI and EV offsetting legacy headwinds and underutilization. The path to higher margins and sustainable growth will depend on execution in scaling new platforms and managing the portfolio transition with discipline.
Industry Read-Through
ON’s results highlight the growing importance of power delivery in AI data center buildouts, signaling a secular shift for all power semiconductor suppliers. The company’s disciplined portfolio pruning and focus on high-value segments mirror broader industry moves as chipmakers exit commoditized markets to chase margin-rich secular themes. China’s EV market remains a rare bright spot, but regional auto and industrial softness persists sector-wide. Margin recovery across the industry will hinge on utilization and the speed of secular demand ramp, with inventory management and fab right-sizing as critical levers for all peers.