UMC Reports Fourth Quarter 2025 Results

Key Terms

earnings per share financial

Earnings per share represent the amount of profit a company makes for each share of its stock, similar to how a pie’s total size can be divided into slices for each person. It helps investors understand how profitable the company is on a per-share basis, making it easier to compare its performance over time or against other companies. Higher earnings per share generally indicate better profitability and can influence a company's stock value.

capacity utilization rate technical

The capacity utilization rate is the percentage of a company's productive capacity that is actually being used over a given period — essentially how much of its “maximum output” is in operation. It matters to investors because it signals demand, efficiency and the need for investment: high rates suggest strong sales and limited immediate room to grow without spending on more equipment, while low rates point to spare capacity, potential cost pressure, or opportunities to increase output without new capital.

capital expenditures financial

Capital expenditures are the money a company spends to buy or improve big assets like buildings, equipment, or machines that will last a long time. These investments matter because they help the company grow and operate more efficiently, similar to how upgrading a home’s appliances or adding a new room can make it better and more valuable.

free cash flow financial

Free cash flow is the amount of money a company has left over after paying all its expenses and investing in its business, like buying equipment or updating facilities. It shows how much cash is available to reward shareholders, pay down debt, or save for future growth. This helps investors understand if a company is financially healthy and able to grow.

circular economy technical

A circular economy is a way of designing and using products so that materials are reused, repaired, or recycled rather than discarded as waste. It mimics natural systems where resources are continually reused, reducing environmental impact and conserving resources. For investors, it represents an opportunity to support sustainable businesses that focus on efficiency and long-term resource management.

silicon photonics technical

Silicon photonics is the technology that uses tiny structures etched into silicon chips to generate, control and detect light for moving data and sensing, essentially putting optical fiber functions onto a computer chip. For investors, it matters because it can dramatically increase data speed and energy efficiency in data centers, telecom networks and advanced sensors, potentially lowering costs and enabling new products much like replacing many metal wires with faster, low-power optical highways.

advanced packaging technical

Advanced packaging describes modern methods for arranging, connecting and enclosing semiconductor chips so they work together more efficiently in a smaller space—think of stacking and wiring tiny electronic building blocks instead of leaving them as separate items on a circuit board. It matters to investors because these techniques can boost product speed, reduce power use, shrink device size and lower manufacturing costs, all of which influence a maker’s competitiveness, profit margins and market share.

debt to equity financial

Debt to equity is a financial ratio that compares a company's total borrowed money to the value provided by its owners (shareholders' equity). It shows how much of the business is funded by lenders versus owners; higher values mean more reliance on borrowing, which can increase risk and interest costs, while lower values suggest a more conservatively financed company. Think of it like comparing a house mortgage to the homeowner's savings—more mortgage means greater financial strain if income drops.

Full-year 22nm revenue increases 93% YoY, reaching record high in Q4 2025

2025 earnings per share of NT$3.34

Fourth Quarter 2025 Overview¹:

• Revenue: NT$61.81 billion (US$1.97 billion)
• Gross margin: 30.7%; Operating margin: 19.8%
• Revenue from 22/28nm: 36%
• Capacity utilization rate: 78%
• Net income attributable to shareholders of the parent: NT$10.06 billion (US$320 million)
• Earnings per share: NT$0.81; earnings per ADS: US$0.129

TAIPEI, Taiwan--(BUSINESS WIRE)-- United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) (“UMC” or “The Company”), a leading global semiconductor foundry, today announced its consolidated operating results for the fourth quarter of 2025.

Fourth quarter consolidated revenue was NT$61.81 billion, increasing 4.5% from NT$59.13 billion in 3Q25. Compared to a year ago, 4Q25 revenue increased 2.4%. Consolidated gross margin for 4Q25 was 30.7%. Net income attributable to the shareholders of the parent was NT$10.06 billion, with earnings per ordinary share of NT$0.81.

Jason Wang, co-president of UMC, said, “In the fourth quarter, our results were in line with guidance, with flattish wafer shipments amid mild demand across most markets. The 4.5% revenue increase during the quarter was supported by favorable foreign exchange movement as well as sequential growth in our 22/28nm business, which continues to improve our product mix. Within the 22/28nm segment, 22nm revenue increased 31% quarter-on-quarter to a record high, accounting for more than 13% of total fourth-quarter revenue. Looking at the full year, UMC delivered solid performance in 2025, with shipments increasing 12.3% and revenue in US dollars up 5.3% year-on-year.”

“Going into the first quarter of 2026, we expect wafer demand to remain firm. UMC is confident that 2026 will be another growth year as tape-outs on our 22nm platforms accelerate and other new solutions continue to gain business traction.”

Co-president Wang added, “We have been working hard to lay the foundation for our next phase of growth, investing for the future in both capacity and technology. In 2025, we completed the new Phase 3 facility at our Singapore Fab 12i, which is already playing a central role in supporting customers to diversify supply chains. At the same time, we are striving to expand our footprint in the U.S. through innovative yet cost-effective modes of partnerships, such as our 12nm collaboration with Intel and the recently announced MOU with Polar Semiconductor. The leadership UMC has built over the past few years across specialty technologies - including embedded High Voltage, Non-Volatile Memory, and BCD - has and will continue to sustain stable business growth. Looking ahead to 2026 and beyond, we expect advanced packaging and silicon photonics to serve as new growth catalysts, positioning UMC to address the evolving needs of high-performance applications across AI, networking, consumer, automotive and more.”

Co-president Wang said, “During 2025, UMC also reached important milestones in our sustainability journey. Just last month, we officially inaugurated our Circular Economy and Recycling Innovation Center, an on-site waste recycling facility expected to reduce UMC’s total waste generated by Taiwan fabs by up to one-third. This is an important initiative in our goal to enhance resource recovery and develop circular economy solutions in our industry. In addition, UMC continues to be recognized as a leader in international corporate sustainability benchmarks, including the CDP and MSCI ESG Ratings.”

Summary of Operating Results

Operating Results
(Amount: NT$ million)		4Q25			3Q25			QoQ % change			4Q24			YoY % change
Operating Revenues		61,810			59,127			4.5			60,386			2.4
Gross Profit		18,958			17,623			7.6			18,343			3.4
Operating Expenses		(7,384	)		(6,973	)		5.9			(6,748	)		9.4
Net Other Operating Income and Expenses		651			467			39.3			362			79.8
Operating Income		12,225			11,118			10.0			11,957			2.2
Net Non-Operating Income and Expenses		3,278			3,526			(7.0	)		(1,443	)		-
Net Income Attributable to Shareholders of the Parent		10,055			14,982			(32.9	)		8,497			18.3
EPS (NT$ per share)		0.81			1.20						0.68
EPS (US$ per ADS)		0.129			0.197						0.104
Exchange rate (USD/NTD)		31.40			30.47						32.78
Note: Sums may not equal totals due to rounding.

Fourth quarter operating revenues grew 4.5% sequentially to NT$61.81 billion. Revenue contribution from 40nm and below technologies represented 53% of wafer revenue. Gross profit increased 7.6% QoQ to NT$18.96 billion, or 30.7% of revenue. Operating expenses increased 5.9% to NT$7.38 billion. Net other operating income increased 39.3% to NT$0.65 billion. Net non-operating income totaled NT$3.28 billion. Net income attributable to shareholders of the parent amounted to NT$10.06 billion.

Earnings per ordinary share for the quarter was NT$0.81. Earnings per ADS was US$0.129. The basic weighted average number of shares outstanding in 4Q25 was 12,487,002,150, compared with 12,485,162,809 shares in 3Q25 and 12,481,192,676 shares in 4Q24. The diluted weighted average number of shares outstanding was 12,594,788,681 in 4Q25, compared with 12,556,345,829 shares in 3Q25 and 12,610,756,874 shares in 4Q24. The fully diluted shares counted on December 31, 2025 were approximately 12,598,993,000.

Detailed Financials Section

Operating revenues increased to NT$61.81 billion. COGS increased 3.2% QoQ to NT$42.85 billion. Gross profit increased 7.6% to NT$18.96 billion. Operating expenses grew 5.9% QoQ to NT$7.38 billion, as G&A increased 8.1% to NT$1.85 billion and R&D increased 6.6% to NT$4.94 billion, while Sales & Marketing decreased 5.3% to NT$0.60 billion. Net other operating income was NT$0.65 billion. In 4Q25, operating income increased 10.0% QoQ to NT$12.23 billion.

COGS & Expenses
(Amount: NT$ million)		4Q25			3Q25			QoQ % change			4Q24			YoY % change
Operating Revenues		61,810			59,127			4.5			60,386			2.4
COGS		(42,851	)		(41,504	)		3.2			(42,043	)		1.9
Depreciation		(12,991	)		(12,635	)		2.8			(11,841	)		9.7
Other Mfg. Costs		(29,860	)		(28,869	)		3.4			(30,202	)		(1.1	)
Gross Profit		18,958			17,623			7.6			18,343			3.4
Gross Margin (%)		30.7	%		29.8	%					30.4	%
Operating Expenses		(7,384	)		(6,973	)		5.9			(6,748	)		9.4
Sales & Marketing		(595	)		(628	)		(5.3	)		(623	)		(4.6	)
G&A		(1,853	)		(1,715	)		8.1			(1,791	)		3.5
R&D		(4,937	)		(4,631	)		6.6			(4,334	)		13.9
Expected Credit Impairment Gain		0			0			0.0			0			(99.5	)
Net Other Operating Income & Expenses		651			467			39.3			362			79.8
Operating Income		12,225			11,118			10.0			11,957			2.2
Note: Sums may not equal totals due to rounding.

Net non-operating income in 4Q25 was NT$3.28 billion, primarily reflecting the NT$2.81 billion in net investment gain and the NT$0.33 billion in exchange gain.

Non-Operating Income and Expenses
(Amount: NT$ million)		4Q25		3Q25			4Q24
Non-Operating Income and Expenses		3,278		3,526			(1,443	)
Net Interest Income and Expenses		134		88			290
Net Investment Gain and Loss		2,812		3,192			(2,614	)
Exchange Gain and Loss		332		250			877
Other Gain and Loss		0		(3	)		4
Note: Sums may not equal totals due to rounding.

In 4Q25, cash inflow from operating activities was NT$33.00 billion. Cash outflow from investing activities totaled NT$17.06 billion, including NT$15.62 billion in capital expenditures, resulting in free cash flow of NT$17.38 billion. Cash outflow from financing activities was NT$11.42 billion, primarily due to NT$20.89 billion in bank loans, partially offset by NT$9.80 billion in bonds issued. Net cash inflow in 4Q25 amounted to NT$6.44 billion. Over the next 12 months, the company expects to repay NT$12.48 billion in bank loans.

Cash Flow Summary
(Amount: NT$ million)		For the 3-Month Period Ended Dec. 31, 2025			For the 3-Month Period Ended Sep. 30, 2025
Cash Flow from Operating Activities		33,003			20,938
Net income before tax		15,503			14,644
Depreciation & Amortization		15,630			14,995
Share of profit of associates and joint ventures		(929	)		(1,250	)
Income tax paid		(301	)		(3,341	)
Changes in working capital & others		3,100			(4,110	)
Cash Flow from Investing Activities		(17,059	)		(16,152	)
Increase in financial assets measured at amortized cost		(3,074	)		(4,043	)
Acquisition of PP&E		(14,826	)		(11,223	)
Acquisition of intangible assets		(667	)		(948	)
Others		1,508			62
Cash Flow from Financing Activities		(11,416	)		(15,160	)
Bank loans		(20,885	)		15,874
Bonds issued		9,800			5,000
Cash dividends		-			(35,788	)
Others		(331	)		(246	)
Effect of Exchange Rate		1,915			2,597
Net Cash Flow		6,443			(7,777	)
Beginning balance		104,217			111,994
Ending balance		110,660			104,217
Note: Sums may not equal totals due to rounding.

Cash and cash equivalents increased to NT$110.66 billion. Days sales outstanding decreased 3 days to 47 days, while days of inventory increased 1 day to 77 days.

Current Assets
(Amount: NT$ billion)		4Q25		3Q25		4Q24
Cash and Cash Equivalents		110.66		104.22		105.00
Accounts Receivable		31.27		32.25		33.34
Days Sales Outstanding		47		50		51
Inventories, net		37.23		35.18		35.78
Days of Inventory		77		76		80
Total Current Assets		204.78		192.85		189.68

Current liabilities increased to NT$88.90 billion. Long-term credit / bonds decreased to NT$45.37 billion. Total liabilities increased to NT$199.14 billion, while debt to equity ratio decreased to 52%.

Liabilities
(Amount: NT$ billion)		4Q25			3Q25			4Q24
Total Current Liabilities		88.90			82.28			75.26
Accounts Payable		9.17			8.04			7.63
Short-Term Credit / Bonds		27.60			30.15			19.51
Payables on Equipment		11.68			11.57			10.52
Other		40.45			32.52			37.60
Long-Term Credit / Bonds		45.37			53.76			55.53
Total Liabilities		199.14			194.20			192.02
Debt to Equity		52	%		54	%		51	%

Analysis of Revenue²

Revenue from Asia Pacific increased to 64%, while business from North America decreased to 21% of sales. Business from Europe increased to 11%, while contribution from Japan was 4%.

Revenue Breakdown by Region
Region		4Q25			3Q25			2Q25			1Q25			4Q24
North America		21	%		25	%		20	%		22	%		25	%
Asia Pacific		64	%		63	%		67	%		66	%		61	%
Europe		11	%		8	%		8	%		7	%		11	%
Japan		4	%		4	%		5	%		5	%		3	%

Revenue contribution from 22/28nm was increased to 36% of wafer revenue, while 40nm contribution remained at 17% of sales.

Revenue Breakdown by Geometry
Geometry		4Q25			3Q25			2Q25			1Q25			4Q24
14nm and below		0	%		0	%		0	%		0	%		0	%
14nm<x<=28nm		36	%		35	%		40	%		37	%		34	%
28nm<x<=40nm		17	%		17	%		15	%		16	%		16	%
40nm<x<=65nm		17	%		18	%		17	%		16	%		16	%
65nm<x<=90nm		8	%		8	%		7	%		8	%		11	%
90nm<x<=0.13um		7	%		8	%		7	%		7	%		10	%
0.13um<x<=0.18um		10	%		9	%		9	%		10	%		9	%
0.18um<x<=0.35um		4	%		4	%		4	%		5	%		4	%
0.5um and above		1	%		1	%		1	%		1	%		0	%

Revenue from fabless customers accounted for 80% of revenue.

Revenue Breakdown by Customer Type
Customer Type		4Q25			3Q25			2Q25			1Q25			4Q24
Fabless		80	%		81	%		81	%		82	%		84	%
IDM		20	%		19	%		19	%		18	%		16	%

Revenue from the communication segment accounted for 42%, while business from computer applications was 12% of sales. Business from consumer applications accounted for 28%, while other segments was 18% of revenue.

Revenue Breakdown by Application (1)
Application		4Q25			3Q25			2Q25			1Q25			4Q24
Computer		12	%		12	%		11	%		11	%		13	%
Communication		42	%		42	%		41	%		40	%		39	%
Consumer		28	%		29	%		33	%		34	%		29	%
Others		18	%		17	%		15	%		15	%		19	%

(1) Computer consists of ICs such as CPU, GPU, HDD controllers, DVD/CD-RW control ICs, PC chipset, audio codec, keyboard controller, monitor scaler, USB, I/O chipset, WLAN. Communication consists of handset components, broadband, bluetooth, Ethernet, LAN, DSP, etc. Consumer consists of ICs used for DVD players, DTV, STB, MP3/MP4, flash controller, game consoles, DSC, smart cards, toys, etc.

Blended ASP Trend

(To view blended ASP trend, please click here for 4Q25 ASP)

Shipment and Utilization Rate³

Wafer shipments decreased 0.6% QoQ to 994K during the fourth quarter, while quarterly capacity was 1,305K. Overall utilization rate in 4Q25 was 78%.

Wafer Shipments
		4Q25		3Q25		2Q25		1Q25		4Q24
Wafer Shipments (12” K equivalents)		994		1,000		967		910		909

Quarterly Capacity Utilization Rate
		4Q25		3Q25		2Q25		1Q25		4Q24
Utilization Rate		78%		78%		76%		69%		70%
Total Capacity (12” K equivalents)		1,305		1,305		1,290		1,264		1,280

Capacity⁴

Total capacity in the fourth quarter was 1,305K 12-inch equivalent wafers. Capacity will decrease to 1,283K 12-inch equivalent wafers in the first quarter of 2026, reflecting the annual production maintenance across 8-inch and 12-inch facilities.

Annual Capacity in thousands of wafers																Quarterly Capacity in thousands of wafers
FAB		Geometry (um)		2025			2024			2023			2022			FAB		1Q26E		4Q25		3Q25		2Q25
WTK	6"	5 – 0.15		317			331			328			335			WTK	6"	78		80		80		80
8A	8"	3 – 0.11		857			829			811			765			8A	8"	212		215		215		215
8C	8"	0.35 – 0.11		500			477			473			459			8C	8"	123		125		125		125
8D	8"	0.18 – 0.11		471			473			440			410			8D	8"	116		118		118		118
8E	8"	0.6 – 0.11		522			524			490			469			8E	8"	129		131		131		131
8F	8"	0.18 – 0.11		583			578			570			550			8F	8"	144		146		146		146
8S	8"	0.18 – 0.11		466			455			447			443			8S	8"	115		117		117		117
8N	8"	0.5 – 0.11		996			1,013			996			952			8N	8"	246		250		250		250
12A	12"	0.13 – 0.014		1,629			1,556			1,305			1,170			12A	12"	402		409		409		409
12i	12"	0.13 – 0.040		684			678			655			655			12i	12"	169		172		172		172
12X	12"	0.080 – 0.022		347			318			317			314			12X	12"	93		95		95		80
12M	12"	0.13 – 0.040		471			455			438			436			12M	12"	117		119		119		119
Total(1)				5,163			5,022			4,674			4,458			Total		1,283		1,305		1,305		1,290
YoY Growth Rate				3	%		7	%		5	%		6	%

⁽¹⁾ One 6-inch wafer is converted into 0.25 (6²/12²) 12-inch equivalent wafer; one 8-inch wafer is converted into 0.44 (8²/12²) 12-inch equivalent wafers. Total capacity figures are expressed in 12-inch equivalent wafers.

CAPEX

CAPEX spending in 4Q25 totaled US$501 million as 2025 CAPEX amounted to US$1.6 billion. 2026 cash-based CAPEX budget will be US$1.5 billion.

Capital Expenditure by Year - in US$ billion
Year	2025	2024	2023	2022	2021
CAPEX	$ 1.6	$ 2.9	$ 3.0	$ 2.7	$ 1.8

2026 CAPEX Plan
8"	12"	Total
10%	90%	US$1.5 billion

Brief Summary of Full Year 2025 Consolidated Results

• Consolidated revenue in NTD increased 2.3% YoY to NT$237.55 billion, from NT$232.30 billion in 2024.
• Gross profit decreased 8.9%, compared to a year ago, representing 29.0% of 2025 revenue.
• Operating income decreased 14.8% year-on-year, accounting for 18.5% of 2025 revenue.
• Net income attributable to shareholders of the parent decreased 11.6% to NT$41.72 billion in 2025.
• EPS was NT$3.34, or EPADS of US$0.532 for 2025.
• 22/28nm revenue contribution accounted for 37% in 2025.

Operating Results
(Amount: NT$ million)		2025			2024			YoY % change
Operating Revenues		237,553			232,303			2.3
Gross Profit		68,906			75,654			(8.9	)
Operating Expenses		(26,948	)		(25,365	)		6.2
Net Other Operating Income and Expenses		1,990			1,324			50.3
Operating Income		43,949			51,613			(14.8	)
Net Non-Operating Income and Expenses		5,699			4,607			23.7
Income Tax Expense		(8,113	)		(9,114	)		(11.0	)
Net Income Attributable to Shareholders of the Parent		41,716			47,211			(11.6	)
EPS (NT$ per share)		3.34			3.80
EPS (US$ per ADS)		0.532			0.580
Exchange rate (USD/NTD)		31.40			32.78

Annual Sales Breakdown in Revenue for Foundry Segment

Region		2025			2024
North America		22	%		25	%
Asia Pacific		65	%		63	%
Europe		9	%		8	%
Japan		4	%		4	%
Technology		2025			2024
14nm and below		0	%		0	%
14nm<x<=28nm		37	%		34	%
28nm<x<=40nm		16	%		14	%
40nm<x<=65nm		17	%		16	%
65nm<x<=90nm		8	%		11	%
90nm<x<=0.13um		7	%		10	%
0.13um<x<=0.18um		10	%		10	%
0.18um<x<=0.35um		4	%		4	%
0.5um and above		1	%		1	%
Customer Type		2025			2024
Fabless		81	%		84	%
IDM		19	%		16	%
Application		2025			2024
Computer		12	%		14	%
Communication		41	%		42	%
Consumer		31	%		28	%
Others		16	%		16	%

First Quarter 2026 Outlook & Guidance

Quarter-over-Quarter Guidance:

• Wafer Shipments: Will remain flat
• ASP in USD: Will remain firm
• Gross Profit Margin: Will be approximately in the high-20% range
• Capacity Utilization: mid-70% range
• 2026 CAPEX: US$1.5 billion

Recent Developments / Announcements

Nov. 13, 2025		Metalenz and UMC Bring Breakthrough Face Authentication Solution Polar ID to Mass Production
Dec. 03, 2025		UMC Honors 16 Suppliers for Outstanding Carbon Reduction Achievements
Dec. 04, 2025		UMC and Polar Collaborate to Meet Growing Demand for U.S. Onshore Semiconductor Manufacturing
Dec. 08, 2025		UMC Licenses imec’s iSiPP300 Technology to Extend Silicon Photonics Capabilities for Next-Generation Connectivity
Dec. 10, 2025		UMC Inaugurates the Circular Economy & Recycling Innovation Center
Dec. 15, 2025		UMC Awarded Top Climate and Water Ratings by CDP for 4th Consecutive Year
Jan. 14, 2026		UMC Awarded AA Score in MSCI ESG Ratings for the Third Consecutive Year
Jan. 16, 2026		SST and UMC Announce Immediate Availability of 28nm SuperFlash® Gen 4 Automotive Grade 1 Platform

Please visit UMC’s website for further details regarding the above announcements

Conference Call / Webcast Announcement

Wednesday, January 28, 2026

Time: 5:00 PM (Taipei) / 4:00 AM (New York) / 09:00 AM (London)

Dial-in numbers and Access Codes:
Taiwan Number:		02 3396 1191
Taiwan Toll Free:		0080 119 6666
US Toll Free:		+1 866 212 5567
Other Areas:		+886 2 3396 1191
Access Code:		1513528#

A live webcast and replay of the 4Q25 results announcement will be available at www.umc.com under the “Investors / Events” section.

About UMC

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry company. The company provides high-quality IC fabrication services, focusing on logic and various specialty technologies to serve all major sectors of the electronics industry. UMC’s comprehensive IC processing technologies and manufacturing solutions include Logic/Mixed-Signal, embedded High-Voltage, embedded Non-Volatile-Memory, RFSOI, BCD etc. Most of UMC’s 12-in and 8-in fabs with its core R&D are in Taiwan, with additional ones throughout Asia. UMC has a total of 12 fabs in production with a combined capacity of more than 400,000 wafers per month (12-in equivalent), and all of them are certified with IATF 16949 automotive quality standards. UMC is headquartered in Hsinchu, Taiwan, plus local offices in the United States, Europe, China, Japan, Korea, and Singapore, with a worldwide total of 20,000 employees. For more information, please visit: http://www.umc.com.

Safe Harbor Statements

This press release contains forward-looking statements within the meaning of Section 27A of the United States Securities Act of 1933, as amended, and Section 21E of the United States Securities Exchange Act of 1934, as amended, and as defined in the United States Private Securities Litigation Reform Act of 1995. These forward-looking statements include, but are not limited to, statements regarding anticipated financial results for the fourth quarter of 2025; the expected wafer shipment and ASP; the anticipated annual budget; capex strategies; environmental protection goals and water management strategies; impact of foreign currency exchange rates; expected foundry capacities; the ability to obtain new business opportunities; and information under the heading “First Quarter 2026 Outlook and Guidance.”

These forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause the actual performance, financial condition or results of operations of UMC to be materially different from what is stated or may be implied in such forward-looking statements. Investors are cautioned that actual events and results could differ materially from those statements as a result of a number of factors including, but not limited to: (i) dependence upon the frequent introduction of new services and technologies based on the latest developments in the industry in which UMC operates; (ii) the intensely competitive semiconductor, communications, consumer electronics and computer industries and markets; (iii) the risks associated with international business activities; (iv) dependence upon key personnel; (v) general economic and political conditions; (vi) possible disruptions in commercial activities caused by natural and human-induced events and disasters, including natural disasters, terrorist activity, armed conflict and highly contagious diseases; (vii) reduced end-user purchases relative to expectations and orders; and (viii) fluctuations in foreign currency exchange rates. Further information regarding these and other risk factors is included in UMC’s filings with the United States Securities and Exchange Commission, including its Annual Report on Form 20-F. All information provided in this release is as of the date of this release and are based on assumptions that UMC believes to be reasonable as of this date, and UMC does not undertake any obligation to update any forward-looking statement as a result of new information, future events or otherwise, except as required under applicable law.

The financial statements included in this release are prepared and published in accordance with Taiwan International Financial Reporting Standards, or TIFRSs, recognized by the Financial Supervisory Commission in the ROC, which is different from International Financial Reporting Standards, or IFRSs, issued by the International Accounting Standards Board. Investors are cautioned that there may be significant differences between TIFRSs and IFRSs. In addition, TIFRSs and IFRSs differ in certain significant respects from generally accepted accounting principles in the ROC and generally accepted accounting principles in the United States.

- FINANCIAL TABLES TO FOLLOW -

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES
Consolidated Condensed Balance Sheet
As of December 31, 2025
Figures in Millions of New Taiwan Dollars (NT$) and U.S. Dollars (US$)
		December 31, 2025
		US$		NT$		%
Assets
Current assets
Cash and cash equivalents		3,524		110,660		19.1%
Accounts receivable, net		996		31,274		5.4%
Inventories, net		1,186		37,228		6.4%
Other current assets		816		25,621		4.4%
Total current assets		6,522		204,783		35.4%
Non-current assets
Funds and investments		2,400		75,373		13.0%
Property, plant and equipment		8,643		271,395		46.9%
Right-of-use assets		238		7,476		1.3%
Other non-current assets		636		19,969		3.5%
Total non-current assets		11,918		374,213		64.6%
Total assets		18,439		578,996		100.0%
Liabilities
Current liabilities
Short-term loans		268		8,409		1.5%
Payables		1,557		48,880		8.4%
Current portion of long-term liabilities		611		19,188		3.3%
Other current liabilities		396		12,420		2.2%
Total current liabilities		2,831		88,896		15.4%
Non-current liabilities
Bonds payable		1,085		34,071		5.9%
Long-term loans		360		11,301		2.0%
Lease liabilities, noncurrent		171		5,376		0.9%
Other non-current liabilities		1,895		59,496		10.3%
Total non-current liabilities		3,511		110,244		19.0%
Total liabilities		6,342		199,141		34.4%
Equity
Equity attributable to the parent company
Capital		4,009		125,882		21.7%
Additional paid-in capital		491		15,410		2.7%
Retained earnings and other components of equity		7,595		238,477		41.2%
Total equity attributable to the parent company		12,095		379,768		65.6%
Non-controlling interests		3		87		0.0%
Total equity		12,097		379,855		65.6%
Total liabilities and equity		18,439		578,996		100.0%
Notes:
(1) New Taiwan Dollars have been translated into U.S. Dollars at the December 31, 2025 exchange rate of NT $31.40 per U.S. Dollar.
(2) Sums may not equal totals due to rounding.

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES
Consolidated Condensed Statements of Comprehensive Income
Figures in Millions of New Taiwan Dollars (NT$) and U.S. Dollars (US$)
Except Per Share and Per ADS Data
		Year over Year Comparison												Quarter over Quarter Comparison
		Three-Month Period Ended												Three-Month Period Ended
		December 31, 2025						December 31, 2024			Chg.			December 31, 2025						September 30, 2025			Chg.
		US$			NT$			NT$			%			US$			NT$			NT$			%
Operating revenues		1,968			61,810			60,386			2.4	%		1,968			61,810			59,127			4.5	%
Operating costs		(1,365	)		(42,851	)		(42,043	)		1.9	%		(1,365	)		(42,851	)		(41,504	)		3.2	%
Gross profit		604			18,958			18,343			3.4	%		604			18,958			17,623			7.6	%
		30.7	%		30.7	%		30.4	%					30.7	%		30.7	%		29.8	%
Operating expenses
- Sales and marketing expenses		(19	)		(595	)		(623	)		(4.6	%)		(19	)		(595	)		(628	)		(5.3	%)
- General and administrative expenses		(59	)		(1,853	)		(1,791	)		3.5	%		(59	)		(1,853	)		(1,715	)		8.1	%
- Research and development expenses		(157	)		(4,937	)		(4,334	)		13.9	%		(157	)		(4,937	)		(4,631	)		6.6	%
- Expected credit impairment gain		0			0			0			(99.5	%)		0			0			0			0.0	%
Subtotal		(235	)		(7,384	)		(6,748	)		9.4	%		(235	)		(7,384	)		(6,973	)		5.9	%
Net other operating income and expenses		21			651			362			79.8	%		21			651			467			39.3	%
Operating income		389			12,225			11,957			2.2	%		389			12,225			11,118			10.0	%
		19.8	%		19.8	%		19.8	%					19.8	%		19.8	%		18.8	%
Net non-operating income and expenses		104			3,278			(1,443	)		-			104			3,278			3,526			(7.0	%)
Income from continuing operations before income tax		494			15,503			10,514			47.4	%		494			15,503			14,644			5.9	%
		25.1	%		25.1	%		17.4	%					25.1	%		25.1	%		24.8	%
Income tax benefit (expense)		(175	)		(5,504	)		(2,054	)		167.9	%		(175	)		(5,504	)		300			-
Net income		318			9,999			8,460			18.2	%		318			9,999			14,944			(33.1	%)
		16.2	%		16.2	%		14.0	%					16.2	%		16.2	%		25.3	%
Other comprehensive income (loss)		278			8,721			1,270			586.4	%		278			8,721			9,005			(3.2	%)
Total comprehensive income (loss)		596			18,720			9,730			92.4	%		596			18,720			23,949			(21.8	%)
Net income attributable to:
Shareholders of the parent		320			10,055			8,497			18.3	%		320			10,055			14,982			(32.9	%)
Non-controlling interests		(2	)		(56	)		(37	)		50.7	%		(2	)		(56	)		(38	)		46.9	%
Comprehensive income (loss) attributable to:
Shareholders of the parent		598			18,776			9,767			92.2	%		598			18,776			23,987			(21.7	%)
Non-controlling interests		(2	)		(56	)		(37	)		50.5	%		(2	)		(56	)		(38	)		47.0	%
Earnings per share-basic		0.026			0.81			0.68						0.026			0.81			1.20
Earnings per ADS (2)		0.129			4.05			3.40						0.129			4.05			6.00
Weighted average number of shares
outstanding (in millions)					12,487			12,481									12,487			12,485
Notes:
(1) New Taiwan Dollars have been translated into U.S. Dollars at the December 31, 2025 exchange rate of NT $31.40 per U.S. Dollar.
(2) 1 ADS equals 5 common shares.
(3) Sums may not equal totals due to rounding.

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES
Consolidated Condensed Statements of Comprehensive Income
Figures in Millions of New Taiwan Dollars (NT$) and U.S. Dollars (US$)
Except Per Share and Per ADS Data
		For the Three-Month Period Ended									For the Twelve-Month Period Ended
		December 31, 2025									December 31, 2025
		US$			NT$			%			US$			NT$			%
Operating revenues		1,968			61,810			100.0	%		7,565			237,553			100.0	%
Operating costs		(1,365	)		(42,851	)		(69.3	%)		(5,371	)		(168,647	)		(71.0	%)
Gross profit		604			18,958			30.7	%		2,194			68,906			29.0	%
Operating expenses
- Sales and marketing expenses		(19	)		(595	)		(1.0	%)		(77	)		(2,433	)		(1.0	%)
- General and administrative expenses		(59	)		(1,853	)		(3.0	%)		(216	)		(6,792	)		(2.9	%)
- Research and development expenses		(157	)		(4,937	)		(8.0	%)		(564	)		(17,725	)		(7.5	%)
- Expected credit impairment gain		0			0			0.0	%		0			2			0.0	%
Subtotal		(235	)		(7,384	)		(11.9	%)		(858	)		(26,948	)		(11.3	%)
Net other operating income and expenses		21			651			1.1	%		63			1,990			0.8	%
Operating income		389			12,225			19.8	%		1,400			43,949			18.5	%
Net non-operating income and expenses		104			3,278			5.3	%		181			5,699			2.4	%
Income from continuing operations before income tax		494			15,503			25.1	%		1,581			49,648			20.9	%
Income tax expense		(175	)		(5,504	)		(8.9	%)		(258	)		(8,113	)		(3.4	%)
Net income		318			9,999			16.2	%		1,323			41,535			17.5	%
Other comprehensive income (loss)		278			8,721			14.1	%		(155	)		(4,860	)		(2.0	%)
Total comprehensive income (loss)		596			18,720			30.3	%		1,168			36,675			15.4	%
Net income attributable to:
Shareholders of the parent		320			10,055			16.3	%		1,329			41,716			17.6	%
Non-controlling interests		(2	)		(56	)		(0.1	%)		(6	)		(182	)		(0.1	%)
Comprehensive income (loss) attributable to:
Shareholders of the parent		598			18,776			30.4	%		1,174			36,857			15.5	%
Non-controlling interests		(2	)		(56	)		(0.1	%)		(6	)		(182	)		(0.1	%)
Earnings per share-basic		0.026			0.81						0.106			3.34
Earnings per ADS (2)		0.129			4.05						0.532			16.70
Weighted average number of shares outstanding (in millions)					12,487									12,485
Notes:
(1) New Taiwan Dollars have been translated into U.S. Dollars at the December 31, 2025 exchange rate of NT $31.40 per U.S. Dollar.
(2) 1 ADS equals 5 common shares.
(3) Sums may not equal totals due to rounding.

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES
Consolidated Condensed Statement of Cash Flows
For the Twelve-Month Period Ended December 31, 2025
Figures in Millions of New Taiwan Dollars (NT$) and U.S. Dollars (US$)
		US$			NT$
Cash flows from operating activities :
Net income before tax		1,581			49,648
Depreciation & Amortization		1,887			59,259
Share of profit of associates and joint ventures		(77	)		(2,418	)
Income tax paid		(203	)		(6,361	)
Changes in working capital & others		(8	)		(264	)
Net cash provided by operating activities		3,180			99,864
Cash flows from investing activities :
Increase in financial assets measured at amortized cost		(263	)		(8,263	)
Acquisition of property, plant and equipment		(1,521	)		(47,745	)
Acquisition of intangible assets		(95	)		(2,989	)
Others		186			5,842
Net cash used in investing activities		(1,693	)		(53,154	)
Cash flows from financing activities :
Decrease in short-term loans		(3	)		(107	)
Proceeds from bonds issued		637			20,000
Proceeds from long-term loans		801			25,142
Repayments of long-term loans		(1,491	)		(46,831	)
Cash dividends		(1,140	)		(35,784	)
Others		(52	)		(1,624	)
Net cash used in financing activities		(1,249	)		(39,204	)
Effect of exchange rate changes on cash and cash equivalents		(59	)		(1,846	)
Net increase in cash and cash equivalents		180			5,660
Cash and cash equivalents at beginning of period		3,344			105,000
Cash and cash equivalents at end of period		3,524			110,660
Notes:
(1) New Taiwan Dollars have been translated into U.S. Dollars at the December 31, 2025 exchange rate of NT $31.40 per U.S. Dollar.
(2) Sums may not equal totals due to rounding.

¹ Unless otherwise stated, all financial figures discussed in this announcement are prepared in accordance with TIFRSs recognized by Financial Supervisory Commission in the ROC, which is different from IFRSs issued by the International Accounting Standards Board. They represent comparisons among the three-month period ending December 31, 2025, the three-month period ending September 30, 2025, and the equivalent three-month period that ended December 31, 2024. For all 4Q25 results, New Taiwan Dollar (NT$) amounts have been converted into U.S. Dollars at the December 31, 2025 exchange rate of NT$ 31.40 per U.S. Dollar.
² Revenue in this section represents wafer sales.
³ Utilization Rate = Quarterly Wafer Out / Quarterly Capacity
⁴ Estimated capacity numbers are based on calculated maximum output rather than designed capacity. The actual capacity numbers may differ depending upon equipment delivery schedules, pace of migration to more advanced process technologies, and other factors affecting production ramp-up.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260128921163/en/

Michael Lin / David Wong

UMC, Investor Relations

+ 886-2-2658-9168, ext. 16900

jinhong_lin@umc.com

david_wong@umc.com

Source: United Microelectronics Corporation