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COHU · CIK 0000021535

What Cohu, Inc. told the SEC could break it.

Cohu's disclosures center on supply fragility and geography in a semiconductor-equipment business. Many of its key parts are available only from a single or limited number of suppliers — in 2025 it hit supply constraints and delays for critical test-socket components driven by governmental regulatory changes. Its manufacturing is concentrated in Southeast Asia (Singapore, Malaysia and the Philippines) plus Japan and the US, concentrating production geographically. And because its industry is in the crosshairs of trade policy, US export controls on Chinese semiconductor manufacturing restrict its and its customers' ability to sell and ship equipment to fabs in China, a significant market.

3 self-disclosed vulnerabilities, pulled from its own filings — each in the company’s words, with the source. This is the risk register almost nobody reads.

In its own words

What could break it.

Sole-source dependency

  • Single/limited-source key parts; 2025 test-socket component constraintshigh

    Many key parts are available only from a single or limited number of suppliers; in 2025 Cohu experienced supply constraints and delays in critical components for its test sockets due to regulatory changes.

    On occasion, we have experienced problems in obtaining adequate and reliable quantities of various parts and components from certain key or sole source suppliers. For example, in 2025, we experienced supply constraints and delays in accessing certain critical components used in our test sockets due to governmental regulatory changes, which if not managed quickly and diligently, could have adversely impacted our ability to supply the fin

    SEC filing →As of 2026

Geographic concentration

  • Manufacturing concentrated in Singapore, Malaysia, Philippines, Japan, U.S.medium

    Manufacturing operations are primarily located in Singapore, Malaysia, the Philippines, Japan and the U.S., concentrating production in Southeast Asia.

    while our corporate headquarters are located in California, additional key engineering, sales and administrative personnel are located in China, Germany, Japan, Malaysia, the Philippines, Singapore, Switzerland, Taiwan and elsewhere in the U.S., and our manufacturing operations are primarily located in Singapore, Malaysia, the Philippines, Japan, and the U.S.

    SEC filing →As of 2026

Regulatory & policy

  • U.S. export controls on China semiconductor manufacturing equipmentlow

    U.S. export controls on Chinese semiconductor manufacturing restrict Cohu's and its customers' ability to sell and ship semiconductor manufacturing equipment to fabs in China, a significant market.

    export controls have continued to be issued relating to the Chinese semiconductor manufacturing, advanced computing, and supercomputer industries, where these additional controls may impact our ability, and/or that of our customers, to sell and ship products to semiconductor fabrication facilities located in China. These export controls include restrictions on certain semiconductor integrated circuits, commodities containing such integrated circuits, and semiconductor manufacturing equipment.

The hidden graph

Who it depends on, and who depends on it.

Relationships surfaced from filings — including ones disclosed by the other side, which is how the non-obvious ones come to light.

Its customers

  • STMicroelectronics N.V.

    During the last three years, the following customers comprised 10% or greater of our consolidated net sales: 2025 2024 2023 STMicroelectronics * * 12.0 % * Less than 10% of consolidated net sales.

    Cited →

Its suppliers

  • Jabil Inc.

    we depend upon Jabil to manufacture most of our semiconductor test systems from its facility located in Malaysia. In the event that Jabil is unable to meet our current delivery schedule for semiconductor test systems, or if Jabil experienced unexpected downtime, we may not be able to sell to our customers, or have significant delays in fulfilling their orders.

    Cited →

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