Finn
FORM Semiconductors · Semiconductor equipment · AI infrastructure · Small cap · Thesis updated August 5, 2026

AI memory stays strong, systems segment returns to growth

01 Running thesis

AI strength meets a systems recovery

FormFactor is a test equipment company tied to the health of chip spending. Its best current story is DRAM, where demand for HBM, a type of high-speed memory used in AI systems, has driven exceptional growth.

The company also benefits from a turnaround in Foundry and Logic. That market grew sharply in early 2026 after falling in FY2025, providing a second growth driver beyond AI memory.

The Systems segment recently flipped from a headwind to a tailwind. After falling in early 2026, the segment grew 44.1 percent year over year in Q2. Management attributes this to the adoption of Triton, a new co-packaged optics testing platform. This removes a major overhang on the business.

Finn's view is balanced. Growth is better than it looked a few quarters ago, but the stock still has to earn its price. Texas factory start-up costs and changing revenue mixes keep the margin story from being entirely clean.

Aug 2026Q2 2026 showed the Systems segment returning to growth at 44.1 percent year over year, driven by the new Triton platform. The core AI demand stayed strong, though Texas factory start-up costs continued to weigh on margins.
May 2026Q1 2026 improved the core story. Foundry & Logic grew 30.4 percent year over year and DRAM grew 69.7 percent, while Systems weakness became the main item to watch.
Feb 2026FY2025 confirmed strong AI-led DRAM demand, but Foundry & Logic was still weak for the year. The filing also added pressure from tariffs and heavy Texas start-up costs.
Nov 2025DRAM re-accelerated on HBM demand, but Foundry & Logic weakened and Systems nearly stalled. The picture became more mixed despite the AI tailwind.
Aug 2025Q2 2025 raised questions about AI demand timing, with DRAM revenue down 1.7 percent year over year. Margins also fell due to tariffs and an unfavorable DRAM product mix.
May 2025Q1 2025 improved the setup because Systems returned to growth and Probe Cards gross margin improved. FormFactor also disclosed a $67.2 million investment for a 20 percent share in FICT.
Feb 2025FY2024 showed the power and cost of AI memory demand. DRAM revenue grew 99.9 percent, but a heavier mix of lower-margin DRAM products pressured Probe Cards margins.
Nov 2024The initial thesis centered on FormFactor as a key semiconductor test supplier. HBM demand for generative AI became the main bull case, balanced by chip cycle and margin risk.
02 Business model

Paid to find bad chips early

FormFactor sells test and measurement tools to semiconductor makers and research labs. Its products help customers find chip problems before bad chips reach final products. That matters because advanced chips are costly to design and produce.

Most revenue comes from probe cards and analytical probes. A probe card touches a wafer, which is a round sheet of unfinished chips, and tests whether each chip works. FormFactor also sells probe stations, thermal systems, and cryogenic systems used in research, design, and debugging.

The business can work well when customers are ramping new chip designs, especially AI memory and high-performance compute chips. It can break when chip makers cut production, delay new designs, or shift to products where FormFactor has lower margins.

The company is also placing longer-term bets. It bought Keystone Photonics in December 2025 to build strength in silicon photonics and co-packaged optics, areas tied to AI data center networking. It also invested $67.2 million in Q1 2025 for a 20 percent share in FICT, a supplier of advanced substrates and PCBs.

03 Product portfolio

The test stack

Growth engine

DRAM and HBM probe cards

These test memory chips on wafers. HBM demand for AI systems is the primary growth catalyst.

Cash cow

Foundry & Logic probe cards

These serve processors, networking chips, and high-performance compute designs. Recent growth confirms a broader market recovery.

Steady

Analytical probes

These are used to measure and debug chips during development. They help customers improve performance before full production.

Steady

Probe stations

These hold and test semiconductor devices in labs and fabs. Recent demand has been mixed as customers shift away from legacy offerings.

Steady

Thermal systems

These test how chips behave at different temperatures. Thermal systems provide stable revenue within the broader product mix.

Option

Cryogenic systems

These test devices at very low temperatures. They are tied to advanced research markets but can be uneven quarter to quarter.

Growth engine

Triton CPO testing platform

Triton targets co-packaged optics, where optical links sit close to chips to move data faster. The product just drove 44.1 percent segment growth in Q2 2026.

04 Business segments

Probe Cards carry the weight

Probe Cards88%growing fast
Systems12%growing fast

Segment mix relies on baseline disclosures, with Probe Cards driving the vast majority of revenue and the Systems segment providing a smaller, specialized contribution.

05 Risk factors

What could go wrong

HBM demand cools

High impact · Medium odds

DRAM growth is tied to HBM chips used in AI systems. That demand was strong in recent quarters, but earlier periods showed that timing of customer designs and reorders can move results. A pause in AI memory spending would hit the main growth engine.

We watchDRAM revenue growth, HBM design activity, and customer reorder timing.

Margins get squeezed

High impact · High odds

Gross margins are under pressure from higher manufacturing costs. The new Texas facility adds a heavy cost layer, with $4.9 million of start-up costs in Q2 2026 and management expecting costs to continue through at least Q4 2026. Revenue growth may not fully show up in profit if these costs stay high.

We watchGross margin trends and quarterly Texas factory start-up costs.

Texas factory delay

Medium impact · Medium odds

FormFactor bought a Texas manufacturing site in June 2025 for $55 million. Initial production is slated for late FY2026. If the site ramps late or poorly, costs could rise before the expected revenue benefits arrive.

We watchInitial production timing in late FY2026 and any change in start-up cost guidance.

China keeps shrinking

Medium impact · Medium odds

China revenue fell to 5.0 percent of total revenue in Q1 2026. U.S. and China trade limits and customer caution can affect ordering. The direct exposure is smaller now, but the decline removes a market that once mattered more.

We watchChina revenue share and any new export controls or tariff changes.
06 Quick answers

In one breath

What does FormFactor actually do?

FormFactor makes tools that test semiconductor wafers and advanced devices. Its probe cards help chip makers find defects before chips are packaged and sold.

Why is FormFactor linked to AI?

AI servers use HBM, a high-speed memory type that needs advanced testing. FormFactor sells DRAM probe cards used for these memory designs, and that has been a major growth driver.

What is the biggest near-term issue for FORM?

The Systems segment needs to keep its momentum with the Triton platform. Investors also need to watch whether tariffs and Texas factory costs keep hurting margins.

Is China still important for FormFactor?

China is less important than before, but still worth watching. Its share of revenue fell to 5.0 percent in Q1 2026, which lowers direct exposure but shows ongoing pressure from trade tensions.

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