# Who are Cohu's customers? Who does Cohu earn revenue from?
Canonical: https://valuechain.wiki/cohu · Facet: customers · Updated: 2026-07-12T05:29:24.236009+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: Cohu's confirmed revenue counterparties include STMicroelectronics, ASE테크놀로지, 앰코테크놀로지 plus 1 undisclosed/aggregate relationship. Per the valuechain.wiki graph: 4 revenue edges, backed by 3 dated sources, 1 of them primary filings (as of 2026-07-12).

### STMicroelectronics (high)  → /stmicroelectronics.md
- note: Cohu supplies test handlers, contactors and interfaces to STMicroelectronics — the only customer Cohu's 10-K names above 10% across the last three years, at 12% of revenue in 2023. It fell below 10% in FY2024 and FY2025 (semiconductor down-cycle and customer-mix shift) but remains a leading back-end customer; STM's automotive and industrial chip test volumes drive demand for this relationship.
- [confirms] Cohu Inc (SEC 10-K) (EN, filing, published 2026-02-17) https://www.sec.gov/Archives/edgar/data/21535/000143774926004339/cohu20251227_10k.htm: "STMicroelectronics = 12.0% of net sales in 2023 (the only >10% named customer); <10% in 2024/2025."

### ASE테크놀로지 (mid)  → /ase.md
- note: Supplies test handlers and interfaces to top OSAT ASE — tied directly to back-end test volume.
- [confirms] Cohu Inc (SEC 10-K) (EN, filing, published 2026-02-17) https://www.sec.gov/Archives/edgar/data/21535/000143774926004339/cohu20251227_10k.htm: "The 10-K describes customers as major IDMs, fabless and OSATs and discloses that the top-10 customers were 60% of FY2025 revenue. Specific OSAT customer names such as ASE are not disclosed in the 10-K (industry/market-report attributed); demand tracks back-end test utilization."
- [confirms] Mordor (EN, analysis, published 2025-01-01) https://www.mordorintelligence.com/industry-reports/semiconductor-test-equipment-market: "Supplies test handlers and interfaces to ASE Technology."

### 앰코테크놀로지 (mid)  → /amkor.md
- note: Supplies test handlers and interfaces to OSAT Amkor — with ASE, one of the two OSAT-channel anchors.
- [confirms] Cohu Inc (SEC 10-K) (EN, filing, published 2026-02-17) https://www.sec.gov/Archives/edgar/data/21535/000143774926004339/cohu20251227_10k.htm: "The 10-K describes customers as major IDMs, fabless and OSATs and discloses top-10 customers at 60% of FY2025 revenue. Specific OSAT names such as Amkor are not disclosed in the 10-K (industry/market-report attributed); test consumables/handlers track back-end volumes."
- [confirms] Mordor (EN, analysis, published 2025-01-01) https://www.mordorintelligence.com/industry-reports/semiconductor-test-equipment-market: "Supplies test handlers and interfaces to Amkor Technology."

### 삼성전자 (low)  → /samsung-electronics.md
- note: Supplies test handlers and contactors to Samsung — a consumable-interface relationship tied to back-end test utilization.
- [confirms] Cohu Inc (SEC 10-K) (EN, filing, published 2026-02-17) https://www.sec.gov/Archives/edgar/data/21535/000143774926004339/cohu20251227_10k.htm: "The 10-K discloses customer concentration (FY2025 top-10 customers = 60% of revenue; net sales $453.0M, +12.7%) and describes customers as major IDMs, fabless and OSATs. The only customer named above 10% is STMicroelectronics (12% in 2023); Samsung is NOT named in the 10-K, and the Samsung supply relationship is attributed to market-report/industry sources (separate Mordor source)."
- [confirms] Mordor Intelligence (KO, news, published 2025-06-01) https://www.mordorintelligence.kr/industry-reports/semiconductor-test-equipment-market: "Test equipment market (incl. Cohu)"
- [confirms] Mordor (EN, analysis, published 2025-01-01) https://www.mordorintelligence.com/industry-reports/semiconductor-test-equipment-market: "Supplies test handlers and interfaces to Samsung Electronics."

Reverse side: https://valuechain.wiki/cohu/suppliers.md · Ripple: https://valuechain.wiki/cohu/ripple.md

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Full node: https://valuechain.wiki/cohu.md · JSON: https://valuechain.wiki/cohu.json