Silicon wafers (300mm) and SiC wafers
SK Siltron
An unlisted SK Group wafer maker. World No.3 in 300mm silicon wafers (after Shin-Etsu and SUMCO), and a top-5 SiC wafer supplier (~15%) alongside Wolfspeed, Coherent, ST and ROHM. Co-develops HBM4 ultra-flat wafers with SK hynix and also supplies Samsung. Expanding 8-inch SiC in Michigan (US CHIPS loan $544M, 30k/month by late 2026).
Updated Jul 12, 2026 4 AI consumers· 2 recurring
Per the valuechain.wiki graph, SK Siltron is directly linked to 3 companies (0 supply, 3 revenue relationships) and reaches 10 companies within two hops; the links are backed by 7 dated sources, 0 of them primary filings (as of 2026-07-12).
Financials & Segments
- Total revenue · Unlisted (SK Group). World No.3 in 300mm; ~15% of SiC
- Customer concentration · Supplies SK hynix (group, HBM4 co-development) and Samsung. SiC serves power electronics and EVs.
- Segments · Semiconductor silicon wafers (300mm/200mm)(world No.3) · SiC wafers(top-5 ~15%)
Revenue from
- SK hynix High confidence
Supplies 300mm wafers to SK hynix and co-develops HBM4 ultra-flat wafers — the key relationship, with group synergy giving direct exposure to the AI-memory up-cycle.Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead - SiC power semiconductors & EV customers (undisclosed) Medium confidence· Market share 15% · 2025 · global SiC wafer share
Supplies 6/8-inch SiC wafers for power electronics and EVs; top-5 globally (~15%).Confirms EN Mordor Intelligence Published Jan 1, 2025: SiC Wafer Market Report (SK Siltron top-5, ~15%) - Infineon Technologies Medium confidence
Supplies SiC wafers to Infineon — the leading power-semiconductor customer, representing SK Siltron's automotive/power demand exposure in its SiC leg. - Samsung Electronics Medium confidence
Supplies 300mm silicon wafers to Samsung — a large customer outside the SK group that broadens the wafer demand base.Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead
Pays to
- polysilicon, quartz crucibles & SiC powder (undisclosed) Low confidence
Polysilicon, quartz crucibles and SiC source powder for crystal growth (undisclosed).Mentions KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead - crystal-growth & polishing equipment (undisclosed) Low confidence
Crystal pullers and polishing/cleaning tools (incl. Michigan SiC expansion).Mentions EN Mordor Intelligence Published Jan 1, 2025: SiC Wafer Market Report (SK Siltron top-5, ~15%)
Investors
- Doosan Group (2026 acquisition) High confidence
Doosan Group acquires 100% of SK Siltron (2026, ~KRW 5T).Confirms KO The Korea Economic Daily (Hankyung) Published May 17, 2026: [Exclusive] Doosan to acquire 100% of SK SiltronConfirms EN KED Global Published May 17, 2026: Doosan to acquire 100% of SK Siltron, redrawing business around chips
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 |
| Apple | lead2 | +34.6 | -26.4 | +49 | +30.7 | +9.1 | +16.2 |
| Broadcom | lead2 | +56.5 | -13.3 | +104.2 | +110.5 | +50.6 | +16 |
| 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 |
| Infineon Technologies | lead1 | +10.4 | -8.6 | +3.4 | -4 | +31 | +75.5 |
| SK Siltron | node | · | · | · | · | · | · |
SK Siltron's thesis is 'a wafer oligopoly holding the starting material of every chip, plus a SiC option.' As world No.3 in 300mm silicon wafers (after Shin-Etsu and SUMCO), it is a picks-and-shovels play that rides the cycle yet is agnostic to which chip wins — since every chip needs a wafer — with SK hynix group synergy (co-developing HBM4 ultra-flat wafers) and Samsung supply as the demand base. On top, top-5 SiC wafers (~15%) for power electronics/EVs and an 8-inch Michigan expansion (US CHIPS loan $544M) add an automotive/power growth option. The keys are memory/AI wafer demand and the SiC ramp; in 2026 Doosan Group's 100% acquisition (~KRW 5T) changes ownership. Being unlisted, its share return is not tracked.
Analysis generated from returns as of 2026-06-23