FormFactor (FORM) Q2 2025: HBM Probe Card Revenue Jumps 25%, Margin Path Remains Elusive

July 30, 2025 | By EarningsIQ Research

HBM probe card revenue surged, confirming FormFactor’s strategic AI positioning, but gross margin progress lagged despite top-line outperformance. Leadership is leaning on advanced packaging and generative AI as secular tailwinds, yet cost and product mix headwinds continue to cloud the path to target profitability. Investors should watch for operational leverage from the new Texas facility and margin recovery as AI-driven demand intensifies.

Summary

  • AI-Driven Demand: FormFactor’s HBM probe card volumes accelerated, underlining AI’s impact on semiconductor test intensity.
  • Margin Recovery Challenge: Unfavorable mix and ramp-up costs offset revenue gains, keeping gross margin well below target.
  • Capacity Bet: Texas facility acquisition signals management’s conviction in long-term AI and advanced packaging growth.

Performance Analysis

FormFactor delivered sequential revenue growth above guidance, driven by a surge in probe card shipments, especially to the high bandwidth memory (HBM) segment. Probe card revenue climbed sharply, with Foundry and Logic up 17% sequentially and DRAM up 17%, while HBM-specific revenue jumped $7.4 million to $37 million, now nearly 19% of total sales. System segment revenue slipped due to shipment pushouts, but management expects a rebound next quarter as those orders convert.

Despite the top-line strength, gross margin performance disappointed. Non-GAAP gross margin fell to 38.5%, at the low end of guidance, reflecting an unfavorable mix—more lower-margin DRAM and less high-margin systems—as well as unexpected ramp-up costs for a new HBM4 customer. Operating expenses ticked higher, partly from the new Texas facility and increased compensation, offsetting some operating leverage from higher revenue. Free cash flow turned negative, but adjusting for the $55 million facility purchase, core cash generation was stable.

  • HBM Momentum: HBM probe card revenue now accounts for a substantial share, with volumes to all three major HBM manufacturers ramping.
  • Margin Drag: Tariffs, startup costs, and weaker systems mix weighed on profitability, with margin still 700 basis points below target model.
  • Capital Allocation: Major facility investment in Texas and a new $150 million credit facility expand future capacity and liquidity.

Overall, FormFactor is executing on AI and advanced packaging opportunities, but must solve for persistent margin compression before investors can underwrite a return to model profitability.

Executive Commentary

"FormFactor's business continues to be driven by two dominant themes, advanced packaging and generative AI. As front-end-driven Moore's Law slows, the innovation and performance offered by advanced packaging and chiplets allows our customers to accelerate their roadmaps and deliver spectacular performance improvements in compute and memory."

Mike Schleser, Chief Executive Officer

"The decrease as compared to the midpoint of our outlook range is attributable mostly to a decrease in systems revenues, which have higher margins, as well as higher manufacturing spend and higher ramp-up costs related to shipments to an HBM DRAM customer."

Shai Wintemberg, Chief Financial Officer

Strategic Positioning

1. HBM and AI-Centric Growth

HBM (High Bandwidth Memory), a memory architecture optimized for AI workloads, is now a core growth engine for FormFactor. The company has achieved volume shipments to all three major HBM manufacturers, diversifying its customer base and reducing reliance on a single dominant player. Management expects HBM4 to drive even higher test complexity and value capture, with higher average selling prices (ASPs) for sophisticated probe cards.

2. Advanced Packaging and Test Complexity

Advanced packaging, which integrates multiple chiplets or dies into a single package, is increasing demand for FormFactor’s test solutions as test intensity rises. The company’s differentiated architectures—SmartMatrix and IntelliFusion—are positioned to capture share as packaging innovation accelerates, especially in AI and edge computing applications.

3. Texas Facility and Cost Structure Transformation

The acquisition of the Farmers Branch, Texas facility, a fit-for-purpose manufacturing site, is a strategic bet on long-term demand and lower-cost production. The facility is expected to deliver operational savings through lower labor and regulatory costs, and regional incentives, though near-term P&L impact will be muted as ramp-up proceeds over several quarters.

4. Systems Segment and Emerging Tech

FormFactor’s systems business is tied to next-generation technologies like co-package optics (CPO) and quantum computing, with pilot production underway for CPO and early traction in quantum test. While not yet a large revenue driver, these platforms provide optionality for future growth as data center and quantum adoption scale.

5. Customer Diversification and Share Opportunity

Management is focused on broadening exposure across major DRAM, foundry, and hyperscaler customers, aiming to buffer against volatility at any one account. The company acknowledges significant share opportunity with its second and third HBM customers, but also the need to improve execution and capacity to realize this upside.

Key Considerations

This quarter highlighted the push-pull between secular AI-driven opportunity and the operational realities of margin pressure and investment cycle. The company’s ability to translate strong demand into improved profitability remains the critical investor debate.

Key Considerations:

  • AI and HBM Demand Tailwind: Sustained HBM and AI growth is driving higher test intensity, but also introduces revenue volatility tied to customer ramps and design cycles.
  • Margin Gap to Model: While revenue is near target run-rate, gross margin remains far below the 47% target, due to mix, tariffs, and operational cost creep.
  • Tariff Exposure: Tariffs are currently a 1 to 1.5 percentage point headwind to gross margin, with risk of further increases if U.S. policy tightens.
  • Capacity Investments: The Texas facility is a long-term lever, but will require further capital and operational ramp before delivering margin benefit.
  • Customer Concentration and Execution Risk: While diversification is improving, share at non-leading HBM customers remains a work in progress.

Risks

Margin recovery is not guaranteed, with tariffs, product mix, and operational execution as persistent headwinds. Customer concentration risk remains, especially if share gains at newer HBM accounts stall. Capital intensity will pressure near-term free cash flow and returns until new capacity is absorbed. Further, industry cyclicality and volatility in AI infrastructure spending could disrupt the growth narrative if hyperscaler or GPU demand moderates.

Forward Outlook

For Q3 2025, FormFactor guided to:

  • Revenue of $200 million, plus or minus $5 million
  • Non-GAAP gross margin of 40%, plus or minus 150 basis points

For full-year 2025, management raised expected capital expenditures to $110–$130 million, reflecting investment in the Texas facility. Operating expenses will rise with headcount and facility ramp. Tariffs remain a variable risk to margin guidance, with potential for up to 2 percentage point impact if rates increase. Management reiterated commitment to the 47% margin model at $850 million revenue, but acknowledged no near-term path to that target.

  • Systems and DRAM to grow sequentially in Q3, with Foundry and Logic moderating after seasonal strength
  • No further HBM ramp-up costs expected in Q3, resolving prior quarter’s margin drag

Takeaways

FormFactor’s secular positioning in AI and advanced packaging is strengthening, but the operational bridge to target profitability remains under construction.

  • HBM and AI Test Intensity: FormFactor is capturing secular tailwinds from AI and advanced packaging, but must prove it can monetize complexity with higher margins.
  • Margin Recovery Path: Leadership is betting on capacity, cost, and mix improvements, but gross margin remains the critical investor watchpoint.
  • Execution on Capacity and Share: Investors should monitor Texas facility ramp, share gains at non-leading HBM customers, and margin progress as key inflection points through 2026.

Conclusion

FormFactor is executing on the right secular trends—AI, HBM, advanced packaging—but has yet to deliver the margin leverage needed for a rerating. The next phase hinges on operational discipline, mix management, and realizing the cost benefits of strategic investments.

Industry Read-Through

FormFactor’s results reinforce the AI-driven shift in semiconductor test and packaging intensity, with HBM and advanced packaging as industry-wide secular growth engines. Margin pressure from tariffs and product mix is a cautionary signal for peers exposed to similar cost and supply chain dynamics. Capital investment in U.S. manufacturing capacity is a growing theme, with implications for equipment, materials, and local supply chains. Players reliant on DRAM, AI, and advanced packaging trends should expect continued volatility in mix and margin as the industry transitions to higher complexity and test requirements.

FORM Technology Semiconductors AI Advanced Packaging HBM Tariffs Capacity