# Who are Uni Test's customers? Who does Uni Test earn revenue from?
Canonical: https://valuechain.wiki/unitest · Facet: customers · Updated: 2026-07-12T05:24:14.735732+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: Uni Test's confirmed revenue counterparties include SK하이닉스, 삼성전자 plus 1 undisclosed/aggregate relationship. Per the valuechain.wiki graph: 3 revenue edges, backed by 6 dated sources, 3 of them primary filings (as of 2026-07-12).

### PRU 계열 태양광 법인 (괌) (high)
- metric: contract 60,080,432,051원 · 계약금액 · DART single supply contract
- note: Solar power plant construction contract in Guam (PRU Tamuning/Barrigada/Malojloj/Pulantat LLC), about KRW 60.1bn or 54.5% of prior-year revenue. A solar EPC revenue axis separate from semiconductor testers, following the KRW 26.9bn Solar One No.4 contract in 2025.
- [confirms] DART (Korea FSS) (KO, filing, published 2026-06-12) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260612900492: "Counterparties: PRU Tamuning/Barrigada/Malojloj/Pulantat LLC; solar plant construction, KRW 60,080,432,051 (54.52% of revenue)."

### SK하이닉스 (high)  → /sk-hynix.md
- metric: contract 29,160,000,000원 · 2026 계약 · DART contract - HBM4 wafer tester
- note: Supplies HBM burn-in and wafer testers to SK hynix — a sole HBM4 wafer-tester win of KRW 29.2B (26.5% of revenue), a direct beneficiary of HBM capacity additions.
- [confirms] DART (Korea FSS) (KO, filing, published 2026-05-12) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260512900186: "Counterparty: SK hynix; HBM4 wafer tester, KRW 29.16bn (26.46% of revenue)."
- [confirms] DART (FSS) (KO, filing, published 2026-03-19) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260319001022: "FY2025 consolidated revenue KRW 110.2bn, operating loss KRW 21.1bn (parent KRW 100.7bn, -16.7bn); semiconductor testers plus solar EPC, single reported segment."
- [confirms] Pinpoint News (KO, news, published 2026-01-01) https://www.pinpointnews.co.kr/news/articleView.html?idxno=389615: "Supplies HBM burn-in and wafer testers to SK hynix."
- [confirms] Green Economy (KO, news, published 2026-01-01) https://www.greened.kr/news/articleView.html?idxno=322441: "Supplies HBM burn-in and wafer testers to SK hynix."

### 삼성전자 (mid)  → /samsung-electronics.md
- note: Supplies HBM burn-in and wafer testers to Samsung — a second memory customer to ease SK concentration.
- [confirms] DART (FSS) (KO, filing, published 2026-03-19) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260319001022: "DART annual report: revenue, customers and business."
- [confirms] Pinpoint News (KO, news, published 2026-01-01) https://www.pinpointnews.co.kr/news/articleView.html?idxno=389615: "Supplies HBM burn-in and wafer testers to Samsung Electronics."
- [confirms] Green Economy (KO, news, published 2026-01-01) https://www.greened.kr/news/articleView.html?idxno=322441: "Supplies HBM burn-in and wafer testers to Samsung Electronics."
- [confirms] Uni Test (English) (EN, ir, published 2025-05-01) https://www.unitest.com/eng/: "Company English IR."

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

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