# Who are Foosung's customers? Who does Foosung earn revenue from?
Canonical: https://valuechain.wiki/foosung · Facet: customers · Updated: 2026-07-12T08:30:45.417137+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: Foosung's confirmed revenue counterparties include 삼성전자, SK하이닉스 plus 2 undisclosed/aggregate relationships. Per the valuechain.wiki graph: 4 revenue edges, backed by 7 dated sources, 2 of them primary filings (as of 2026-07-12).

### 삼성전자 (high)  → /samsung-electronics.md
- metric: Revenue ₩471.6B · FY2025 · consolidated total revenue
- note: Supplies specialty gases — C4F6 (etch) and WF6 (tungsten interconnect) — to Samsung (Korea’s only maker).
- [confirms] DART (Korea FSS) (KO, filing, published 2026-03-20) https://dart.fss.or.kr/dsae001/selectPopup.do?selectKey=00595191: "FY2025 revenue ₩472B."
- [confirms] HuffPost Korea (KO, news, accessed 2026-06-20) https://www.huffingtonpost.kr/article/239927: "Foosung is Korea’s only C4F6/WF6 maker, supplying Samsung and SK."
- [confirms] Abachy (EN, reference, accessed 2026-06-20) https://abachy.com/catalog/materials/gases/foosung-co-ltd: "Foosung supplies semiconductor C4F6 and WF6 specialty gases."

### SK하이닉스 (high)  → /sk-hynix.md
- note: Supplies C4F6/WF6 specialty gases to SK hynix; WF6 demand surges with high-stack 3D NAND.
- [mentions] Eugene Investment & others (KO, research, published 2026-05-01) https://alphadistill.com/report/1521: "Semi specialty-gas/electrolyte/refrigerant beneficiary; targets KRW 17,500-20,000 (Buy); 2026 revenue seen KRW 579.5bn"
- [confirms] DART (FSS) (KO, filing, published 2026-03-18) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260318001491: "FY2025 consolidated revenue KRW 272.3bn, operating income 140억."
- [confirms] HuffPost Korea (KO, news, accessed 2026-06-20) https://www.huffingtonpost.kr/article/239927: "Foosung supplies specialty gases to Samsung and SK hynix."
- [confirms] Today Energy (KO, news, accessed 2026-06-20) http://www.todayenergy.kr/news/articleView.html?idxno=38459: "Foosung’s C4F6 earned semiconductor evaluation certification."

### 창업주 일가 (김용민·김근수) (high)
- note: Founder-family-controlled ownership — the founding Kim family (Yong-min 20.85%, Geun-soo 11.69%) together forms the largest shareholding. Ownership expanding a fluorochemical portfolio spanning semiconductor specialty gases, battery electrolytes and fluorine refrigerants over the long term.
- [confirms] DART (FSS) (KO, filing, published 2026-03-18) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260318001491: "Largest holders the founder Kim family (Yong-min 20.85%, Geun-soo 11.69%)."

### 이차전지·기타 (mid)
- note: Supplies battery electrolyte (LiPF6), refrigerants and others — a diversification axis complementing the semi-gas cycle, benefiting from rising non-Chinese LiPF6 demand.
- [mentions] DART (Korea FSS) (KO, filing, published 2026-03-20) https://dart.fss.or.kr/dsae001/selectPopup.do?selectKey=00595191: "Diversifying into battery materials."

### 미국 배터리 소재 업체 (비공개) (low)
- metric: volume 1,000 톤/년 · 연간 · media report
- note: Annual supply contract for about 1,000 tonnes of LiPF6. An export deal amid rising demand for non-Chinese LiPF6 as China tightens volumes.
- [mentions] Korea Credit News (KO, news, published 2025-11-17) https://www.creditnews.kr/news/articleView.html?idxno=1847: "Foosung has an annual supply contract with a US company for about 1,000 tonnes of LiPF6."

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

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