KOSDAQ · Semi specialty gases · Korea's only C4F6/WF6
Foosung
Korea’s only maker of semiconductor specialty gases (C4F6 for etch, WF6 for tungsten interconnect). FY2025 revenue ₩472B. Supplies Samsung and SK hynix; WF6 demand surges with high-stack 3D NAND. Diversifying into battery electrolyte (LiPF6).
093370.KS Updated Jul 12, 2026 6 AI consumers· 3 recurring
Per the valuechain.wiki graph, Foosung is directly linked to 2 companies (0 supply, 2 revenue relationships) and reaches 9 companies within two hops; the links are backed by 7 dated sources, 2 of them primary filings (as of 2026-07-12).
Financials & Segments
- Total revenue · FY2025 revenue ₩472B
- Customer concentration · Korea’s only C4F6/WF6 maker. Customers Samsung, SK hynix.
- Segments · Semiconductor gases · Battery materials · Refrigerants & fluorides
Revenue from
- Samsung Electronics High confidence· Revenue ₩471.6B · FY2025 · consolidated total revenue
Supplies specialty gases — C4F6 (etch) and WF6 (tungsten interconnect) — to Samsung (Korea’s only maker).Confirms KO HuffPost Korea Accessed Jun 20, 2026: Foosung, Korea’s only C4F6/WF6 maker, supplies Samsung and SK - SK hynix High confidence
Supplies C4F6/WF6 specialty gases to SK hynix; WF6 demand surges with high-stack 3D NAND.Mentions KO Eugene Investment & others Published May 1, 2026: Semi specialty-gas/electrolyte/refrigerant beneficiary; targets KRW 17,500-20,000 (Buy); 2026 revenue seen KRW 579.5bnConfirms KO HuffPost Korea Accessed Jun 20, 2026: Foosung, Korea’s only C4F6/WF6 maker, supplies Samsung and SKConfirms KO Today Energy Accessed Jun 20, 2026: Foosung earns semiconductor evaluation certification for C4F6 - secondary batteries & other Medium confidence
Supplies battery electrolyte (LiPF6), refrigerants and others — a diversification axis complementing the semi-gas cycle, benefiting from rising non-Chinese LiPF6 demand. - 미국 배터리 소재 업체 (비공개) Low confidence· volume 1,000 톤/년 · 연간 · media report
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 KO Korea Credit News Published Nov 17, 2025: LiPF6 prices double as China tightens supply, boosting Foosung
Pays to
- fluorite & inorganic-fluorine feedstock (undisclosed) Low confidence
Buys fluorspar and inorganic-fluorine feedstock (suppliers undisclosed). - refining & charging equipment (undisclosed) Low confidence
Buys gas purification/filling equipment and cylinders (undisclosed).
Investors
- Founder family (Yong-min Kim, Geun-soo Kim) High confidence
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.
Value-chain ripple (2 tiers)
Following node-to-node links up to 2 tiers; each firm is shown once, at its nearest tier.
| Company | Chain | '21 | '22 | '23 | '24 | '25 | YTD |
|---|---|---|---|---|---|---|---|
| Marvell | lead2 | +84.6 | -57.5 | +63.7 | +83.8 | -22.8 | +177.8 |
| AMD | lead2 | +56.9 | -55 | +127.6 | -18.1 | +77.3 | +160.5 |
| Everpure (formerly Pure Storage) | lead2 | +44 | -17.8 | +33.3 | +72.3 | +9.1 | +18.4 |
| Broadcom | lead2 | +56.5 | -13.3 | +104.2 | +110.5 | +50.6 | +16 |
| Alphabet (Google) | lead2 | +65.3 | -39.1 | +58.3 | +36 | +66 | +14.3 |
| NVIDIA | lead2 | +125.5 | -50.3 | +239 | +171.2 | +38.9 | +13.3 |
| Qualcomm | lead2 | +22.3 | -38.6 | +35.1 | +8.3 | +13.8 | +11.7 |
| SK hynix | lead1 | -0.4 | -25.6 | +53.9 | +48.6 | +361.1 | +140.3 |
| Samsung Electronics | lead1 | -9 | -14.2 | +20.9 | -26.4 | +212.9 | +77.9 |
| Foosung | node | +59.9 | -33.5 | -34.5 | -39.1 | +67.4 | +62.2 |
YTD as of 2026-07-10 · source: Yahoo Finance
The thesis is a materials-bottleneck position as Korea's only maker of etch/interconnect specialty gases (C4F6, WF6). C4F6 is essential for high-aspect-ratio etch and WF6 for tungsten interconnect; with Samsung and SK hynix as customers, high-stack 3D NAND adds wiring layers and etch steps, growing WF6/C4F6 consumption — and because gases are consumed anew each process, it is recurring revenue tied to fab utilization. It has diversified into battery electrolyte (LiPF6), signing an annual ~1,000-ton supply deal with a US firm, adding an export option as China's volume control lifts demand for non-Chinese LiPF6. Risks are revenue concentration in two customers (Samsung, SK) and the memory cycle, and costs driven by fluorspar and inorganic-fluorine feedstock sourcing/prices.
Analysis generated from returns as of 2026-07-10Analyst ratings
Consensus: Buy 2 · Hold 0 · Sell 0 · Avg. target ₩20,000 · Price ₩13,740 (07-10) · Upside +46%
| Broker | Rating | Target | Published | |
|---|---|---|---|---|
| Eugene Investment & Securities | Buy | ₩20,000 | May 18, 2026 | Report ↗ |
| Eugene Investment & Securities | Buy | ₩20,000 | Apr 23, 2026 | Report ↗ |
Q1 revenue beat and a strong standalone turnaround confirmed, with semiconductor specialty gas (WF6) and battery material (LiPF6) both improving; maintains Buy and a KRW 20,000 target, expecting stronger results from Q2.