Silicon wafers · World No.2 in 300mm (~25%)
SUMCO Corporation
The world’s No.2 silicon-wafer maker with about 25% of 300mm supply. Shin-Etsu and SUMCO together cover more than half of 300mm volume. Supplies polished wafers under long-term agreements to TSMC, Samsung, SK hynix, Micron and Intel; ultra-flat wafers for HBM4 and hybrid bonding have become a key bottleneck.
3436.T Updated Jul 12, 2026 5 AI consumers· 4 recurring
Per the valuechain.wiki graph, SUMCO Corporation is directly linked to 5 companies (0 supply, 5 revenue relationships) and reaches 31 companies within two hops; the links are backed by 6 dated sources, 1 of them primary filings (as of 2026-07-12).
Financials & Segments
- Total revenue · About 25% of global 300mm wafer supply (world No.2)
- Customer concentration · Customers TSMC, Samsung, SK, Micron, Intel under LTAs. HBM4 ultra-flat wafer supply is critical.
- Segments · Semiconductor silicon (300mm/200mm wafers)(~25% of 300mm) · Other chemicals/materials
Revenue from
- Samsung Electronics High confidence· Market share 25% · 2023~2025 · global 300mm wafer share
Supplies 300mm polished wafers to Samsung under LTAs — HBM4 ultra-flat wafer supply is a new premium bottleneck.Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s leadConfirms EN Market Growth Reports Published Jan 1, 2025: 300mm Silicon Wafers Market (top five ~85%) - SK hynix High confidence
Supplies 300mm polished wafers to SK hynix under LTAs — a beneficiary as HBM expansion raises wafer input.Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead - Micron Technology High confidence
Supplies 300mm polished wafers to Micron under LTAs — wafer demand stacks when the three memory makers expand at once.Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead - TSMC High confidence
Supplies 300mm polished wafers to TSMC under long-term agreements — a duopoly with Shin-Etsu that leaves no ready alternative, a bottleneck.Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead - Intel Medium confidence
Supplies 300mm polished wafers to Intel under LTAs — the wafer axis of its foundry expansion.Mentions EN Analyst consensus Published May 1, 2026: SUMCO — analyst consensus (300mm wafer cycle recovery)Confirms KO BizWatch Published May 23, 2025: SK Siltron, the hidden wafer champion, takes on Japan’s lead
Pays to
- crystal-growth & polishing equipment (undisclosed) Low confidence
Crystal pullers and polishing/cleaning equipment (undisclosed). - polysilicon, quartz crucibles & energy (undisclosed) Low confidence
Polysilicon, quartz crucibles and energy for crystal growth (suppliers undisclosed).
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 | +163.4 |
| MediaTek | lead2 | +27.8 | -26.6 | +52.9 | +58.3 | +24.9 | +152.4 |
| AMD | lead2 | +56.9 | -55 | +127.6 | -18.1 | +77.3 | +123 |
| Global Unichip | lead2 | +21.4 | +67.6 | +99.4 | -13.7 | +101.4 | +122.8 |
| Fortinet | lead2 | +142 | -32 | +19.7 | +61.4 | -16 | +96.8 |
| Astera Labs | lead2 | · | · | · | · | +25.6 | +86.6 |
| HP Inc. | lead2 | +57.2 | -26.4 | +16.1 | +12.1 | -28.7 | +50.7 |
| Everpure (formerly Pure Storage) | lead2 | +44 | -17.8 | +33.3 | +72.3 | +9.1 | +48.5 |
| Realtek | lead2 | +19.6 | -33.8 | +56.2 | +19.1 | -6.4 | +47.5 |
| Cisco | lead2 | +45.8 | -22.5 | +9.3 | +21 | +33.5 | +43.8 |
| Alchip Technologies | lead2 | +14.3 | -8.7 | +365.1 | -18.9 | +0.8 | +36.1 |
| Analog Devices | lead2 | +21 | -4.9 | +23.4 | +8.8 | +29.8 | +34.8 |
| Renesas Electronics | lead2 | +8.2 | +2.4 | +88 | -13.6 | +23.8 | +28.2 |
| NVIDIA | lead2 | +125.5 | -50.3 | +239 | +171.2 | +38.9 | +23.7 |
| Credo Technology | lead2 | · | · | +46.3 | +245.2 | +114.1 | +18.5 |
| Microchip Technology | lead2 | +27.5 | -18 | +30.9 | -35 | +14.6 | +18.4 |
| Sony Semiconductor Solutions | lead2 | +27.2 | -8.4 | +27.8 | +17.9 | +1 | +12.9 |
| NXP Semiconductors | lead2 | +44.8 | -29.2 | +48.4 | -8 | +6.4 | +5.9 |
| Broadcom | lead2 | +56.5 | -13.3 | +104.2 | +110.5 | +50.6 | +3.8 |
| Montage Technology | lead2 | -18.2 | -21.8 | -18 | +51.4 | +169 | +3.4 |
| Qualcomm | lead2 | +22.3 | -38.6 | +35.1 | +8.3 | +13.8 | +0.2 |
| Ambarella | lead2 | +121 | -59.5 | -25.5 | +18.7 | -2.6 | -11.2 |
| Phison Electronics | lead2 | +26.8 | -10.7 | +45.1 | -6.7 | +418.3 | -14.7 |
| Mobileye | lead2 | · | · | +23.6 | -54 | -47.6 | -18 |
| Will Semiconductor | lead2 | -12.1 | -49.7 | -8.3 | +22.8 | +15.5 | -33.7 |
| Micron Technology | lead1 | +24.2 | -45.9 | +71.9 | -1 | +240.2 | +256.4 |
| Intel | lead1 | +6.1 | -46.6 | +94.6 | -59.6 | +84 | +159.6 |
| SK hynix | lead1 | -0.4 | -25.6 | +53.9 | +48.6 | +361.1 | +81.6 |
| Samsung Electronics | lead1 | -9 | -14.2 | +20.9 | -26.4 | +212.9 | +59.7 |
| TSMC | lead1 | +12.1 | -36.7 | +42.3 | +92.6 | +55.9 | +41.9 |
| SUMCO Corporation | node | -4.3 | -3.9 | +21.3 | -48.1 | +41.7 | +100.6 |
YTD as of 2026-09-04 · source: Yahoo Finance
SUMCO Corporation operates across Nikkei, Silicon wafers, World No.2 in 300mm (~25%). It is up +100.6% in 2026. The stock (+100.6%) and its demand side (avg +109.9%) are moving in step. Among connected nodes the furthest ahead is Micron Technology (+256.4%) and the furthest behind is TSMC (+41.9%). If chain logic explains the gap, the laggard is the next propagation candidate; if not, the link itself deserves a second look. Supplies polished wafers under long-term agreements to TSMC, Samsung, SK hynix, Micron and Intel; ultra-flat wafers for HBM4 and hybrid bonding have become a key bottleneck.
Analysis generated from returns as of 2026-09-04Analyst ratings
Consensus: Buy 1 · Hold 1 · Sell 1 · Avg. target ¥2,733 · Price ¥3,229 (09-04) · Upside -15%
| Broker | Rating | Target | Published | |
|---|---|---|---|---|
| Morgan Stanley | Underweight | ¥3,000 | Jun 9, 2026 | Report ↗ |
| UBS | Neutral | ¥3,100 | May 21, 2026 | Report ↗ |
| Nomura | Buy | ¥2,100 | Sep 29, 2025 | Report ↗ |
Views are split: Nomura (Buy) and UBS (upgrade to Neutral) turned less bearish on the wafer recovery, while Morgan Stanley cut SUMCO to Underweight on valuation in June 2026.
Analyses covering this node
- Target upside is a residual, not a signal: consensus writes down the chain after the fact Jul 10, 2026