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The themes United Microelectronics is part of, the highest-graded companies in its industry, and the companies in its sector whose grade rose recently.
Highest-graded in Semiconductors
Graded A or B and worth $2B or more: A first, then the largest.
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Grade rose recently in Technology
Rose to A or B on a filing in the last 90 days, worth $2B or more: largest first.
LRCXLAM Research CorporationOct 22, 2026BAGraded B, now A
IBMInternational Business Machines CorporationOct 21, 2026BAGraded B, now A
CDNSCadence Design Systems, Inc.Oct 28, 2026BAGraded B, now A
NXPINXP Semiconductors N.V.Oct 27, 2026BAGraded B, now A
UIUbiquiti Inc.Nov 6, 2026BAGraded B, now A
How it makes money
- Contract chip manufacturing
Competes with
- TSMTaiwan Semiconductor Manufacturing CompanyB
- Size
- $2.07T
- Margin
- 51.5%
- GFSGlobalFoundriesC
- Size
- $23B
- Margin
- 2.8%
- 0981Semiconductor Manufacturing International Corporation
- 005930Samsung Electronics
What it sells5
Wafer fabrication
Manufacturing customers’ chip designs on silicon wafers, using processes suited to the chip’s intended use.
Design and intellectual-property support
Engineering help, design libraries and reusable circuit building blocks that help customers prepare designs for manufacturing.
Wafer probing
Testing individual chips while they are still on the wafer and identifying those that fail to meet required standards.
Show 2 more
Assembly and final testing
An optional service in which outside providers package manufactured chips and test them before shipment.
Silicon photonics and advanced packaging
Manufacturing silicon photonics chips that carry data using light, and packaging methods that connect or stack chips and other components.
Who buys it3
- Fabless chip-design companies, which design and sell chips but hire outside manufacturers; examples include MediaTek, Realtek and Novatek.
- Integrated device manufacturers, which design and sell chips and may use outside manufacturing alongside their own factories; examples include Texas Instruments and Intel.
- Customers in communications, consumer electronics and computing buy wafer production, often with design support and optional testing and assembly services.
What it stands on, and what could break it
What the business leans on
- 1Its ten largest customers accounted for 57.0% of operating revenue (2025, high confidence).
- 2Chip production depends on silicon wafers, chemicals and gases; silicon wafer suppliers include Shin-Etsu, GlobalWafers, Sumco Group and Soitec.
- 3Some manufacturing equipment is available from only a limited number of qualified suppliers.
- 4Taiwan manufacturing depends on substantial electricity and water supplies, including electricity from Taiwan Power Company.
What could go wrong
- 1Losing major customers could reduce sales; the ten largest customers accounted for 57.0% of operating revenue (2025, high confidence).
- 2Chip-industry downturns and excess factory capacity can reduce orders and selling prices, affecting factory use and profit margins.
- 3Taiwan-based manufacturing could be disrupted by earthquakes, water shortages, power interruptions or political tensions across the Taiwan Strait.
About United Microelectronics Corp.
UMC makes chips on silicon wafers using designs supplied by its customers. It works with customers on design and manufacturing, and can also arrange wafer testing, assembly and final testing through outside specialists. Its chips are used in communications equipment, consumer electronics and computers.
- Head office
- Hsinchu, Taiwan
- Founded
- May 1980 (high confidence)
- Listed on
- NYSE
- Financial year ends
- December 31
Built from United Microelectronics Corp.’s own filings with the U.S. Securities and Exchange Commission (SEC). Figures are as reported, with per-share history restated onto today’s share basis. This company files in TWD. Figures are converted to US dollars at $1.00 = 32.9256 TWD, the current rate, applied to every period alike — so growth and margins are the company’s own and not the exchange rate’s. This describes a business — it is not investment advice and not a recommendation to buy or sell anything.
