# Who does STMicroelectronics pay? Who are its key suppliers?
Canonical: https://valuechain.wiki/stmicroelectronics · Facet: suppliers · Updated: 2026-07-12T05:29:24.513378+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: STMicroelectronics's confirmed suppliers/cost counterparties include Cohu (test handlers & contactors), 울프스피드, Synopsys plus 2 undisclosed/aggregate relationships. Per the valuechain.wiki graph: 5 cost edges, backed by 8 dated sources, 5 of them primary filings (as of 2026-07-12).

### 코후(테스트 핸들러·컨택터) (high)  → /cohu.md
- note: Uses Cohu's test handlers, contactors and interfaces in back-end test — STM was the only >10% customer named in Cohu's 10-K (12% in 2023). As an automotive/industrial IDM, its procurement of test equipment and consumables anchors back-end yield and 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: "Cohu 10-K: STMicroelectronics only >10% customer (12% in 2023)."

### 울프스피드 (mid)  → /wolfspeed.md
- note: Purchases SiC wafers and materials from Wolfspeed.
- [confirms] SEC EDGAR (EN, filing, published 2025-02-01) https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=STM&type=20-F: "Buys SiC wafers from Wolfspeed."
- [confirms] ZDNet Korea (KO, news, published 2025-01-01) https://zdnet.co.kr/view/?no=20240627154505: "Buys SiC wafers from Wolfspeed."
- [confirms] e4ds (KO, news, published 2025-01-01) https://www.e4ds.com/sub_view.asp?ch=11&t=0&idx=18312: "Buys SiC wafers and materials from Wolfspeed."
- [confirms] SEC EDGAR (EN, filing, published 2024-08-01) https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=WOLF&type=10-K: "Buys SiC wafers and materials from Wolfspeed."

### Synopsys (mid)  → /synopsys.md
- note: Pays for synopsys EDA tools and IP licenses.
- [confirms] SEC EDGAR (EN, filing, published 2025-12-22) https://www.sec.gov/Archives/edgar/data/883241/000088324125000028/snps-20251031.htm: "stmicroelectronics designs chips on synopsys EDA tools and IP."
- [confirms] SemiAnalysis (EN, research, published 2025-09-01) https://newsletter.semianalysis.com/p/eda-market-primer: "stmicroelectronics designs chips on synopsys EDA tools and IP."

### Cadence Design Systems (mid)  → /cadence.md
- note: Pays for cadence EDA tools and IP licenses.
- [confirms] SEC EDGAR (EN, filing, published 2026-02-19) https://www.sec.gov/Archives/edgar/data/813672/000081367226000016/cdns-20251231.htm: "stmicroelectronics designs chips on cadence EDA tools and IP."
- [confirms] SemiAnalysis (EN, research, published 2025-09-01) https://newsletter.semianalysis.com/p/eda-market-primer: "stmicroelectronics designs chips on cadence EDA tools and IP."

### 전공정 장비 (비공개) (low)
- note: Parts, materials and R&D (undisclosed).
- [confirms] SEC EDGAR (EN, filing, published 2025-02-01) https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=STM&type=20-F: "Parts, materials and R&D (undisclosed)."

Reverse side: https://valuechain.wiki/stmicroelectronics/customers.md · Ripple: https://valuechain.wiki/stmicroelectronics/ripple.md

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