Slide 1: 3Q25 Investor Conference
3Q25 Investor Conference Nov. 5th, 2025 1
Slide 2: Safe Harbor Notice
Safe Harbor Notice • We have made forward-looking statements in this presentation. Our forward-looking statements contain information regarding, among other things, our financial condition, future expansion plans and business strategies. We have based these forward- looking statements on our current
Slide 3: Agenda
Agenda 01 Financial Results Hsiang-Yun Fan - EVP 02 Business Recap & Outlook James Chen - President 03 Excellence & Forward Cheng-Kung Lin - Chairman of METC 04 Q & A 3
Slide 4: Financial Results
te vy mes wy i >, a 4 Ye} ~, ay j Financial Results
Slide 5: Statement of Comprehensive Income - Consolidated
Statement of Comprehensive Income - Consolidated (In NT$ millions unless otherwise noted) 3Q25 2Q25 QoQ 3Q24 YoY Net Sales 21,771 21,018 +3.6% 21,312 +2.1% Gross Profit 10,166 4,763 +113.4% 6,246 +62.7% Gross Margin 46.7% 22.7% +24 ppts 29.3% +17 ppts Operating Expenses 6,463 6,058 +6.7% 5,974 +8.2%
Slide 6: Revenue by Products - Consolidated
Revenue by Products - Consolidated 47% 3Q25 vs. 2Q25 (QoQ) 32% 33% 29% 28% 28% 27% 26% 23% 1,007 NT$M 300 21,484 21,312 21,771 21,018 19,506 20,121 19,993 19,174 18,692 33% -529 38% 37% 37% 42% CMS Flash Logic IC 42% 45% 43% 38% 35% 35% 37% 34% 3Q25 vs. 3Q24 (YoY) 30% 32% 34% 32% 38% 1,653 25% 27% 3
Slide 7: Revenue and Gross Margin by Products
Revenue and Gross Margin by Products NT$M Memory NT$M Logic IC 51% 42% 40% 42% 37% 38% 41% 34% 35% 36% 30% 21% 16% 21% 18% 12% 15% 10% 14,132 12,948 12,941 12,824 11,283 11,018 11,190 10,132 10,349 53% 8,871 58% 62% 56% 8,318 8,417 8,171 8,305 7,905 7,747 54% 57% 7,193 7,217 59% 65% 65% 47% 46% 42%
Slide 8: Memory Business Quarterly Highlights
Memory Business Quarterly Highlights (In NT$ millions unless otherwise noted) 3Q25 2Q25 QoQ 3Q24 YoY Net Sales 14,132 12,824 +10.2% 12,941 +9.2% Gross Profit 7,183 1,547 +364.2% 2,777 +158.7% Gross Margin 50.8% 12.1% +39 ppts 21.5% +29 ppts Operating Expenses 2,988 2,644 +13.0% 2,573 +16.1% Operatin
Slide 9: Balance Sheet - Consolidated
Balance Sheet - Consolidated (In NT$ millions unless otherwise noted) 09.30.2025 06.30.2025 09.30.2024 Cash & Cash Equivalents 17,203 9% 20,317 11% 15,505 8% Accounts Receivable 13,302 7% 11,855 7% 11,563 6% Inventories 25,251 14% 21,629 12% 23,057 13% Long-term Investments 22,853 12% 18,400 10% 24,
Slide 10: Statement of Cash Flow - Consolidated
Statement of Cash Flow - Consolidated (In NT$ millions unless otherwise noted) 3Q25 2Q25 3Q24 Cash Flow from Operating Activities 2,836 2,437 2,096 Depreciation & Amortization 3,126 3,210 3,236 Cash Flow from Investing Activities (1,621) (1,824) (2,982) CAPEX (1,368) (1,412) (2,913) Cash Flow from F
Slide 11: Operating Expenses - Consolidated
Operating Expenses - Consolidated 31% 31% 31% 30% 29% 29% 30% 28% 28% NT$M 6,463 5,978 5,949 5,974 6,087 6,058 5,884 5,748 5,822 788 839 802 791 799 836 803 SG&A 782 783 998 917 974 885 971 912 1,040 985 994 2,253 2,138 2,170 2,202 2,176 2,129 2,151 2,066 2,261 R&D 2,051 1,909 1,879 1,990 2,038 1,97
Slide 12: Logic Business Performance - Nuvoton Income Statement
Logic Business Performance - Nuvoton Income Statement (In NT$ millions unless otherwise noted) 3Q25 2Q25 QoQ 3Q24 YoY Net Sales 7,272 7,816 -7.0% 7,957 -8.6% Gross Profit 2,597 2,728 -4.8% 2,972 -12.6% Gross Margin 35.7% 34.9% +1 ppts 37.3% -2 ppts Operating Expenses 3,113 3,030 +2.8% 3,004 +3.6% Op
Slide 13: Logic Business Performance - Nuvoton Balance Sheets
Logic Business Performance - Nuvoton Balance Sheets (In NT$ millions unless otherwise noted) 09.30.2025 06.30.2025 09.30.2024 Cash & Cash Equivalents 9,584 29% 9,685 29% 5,272 17% Accounts Receivable 4,239 13% 4,353 13% 4,013 13% Inventories 6,188 19% 6,537 19% 6,759 22% Long-term Investments 2,723
Slide 14: Corporate Value
Corporate Value EPS EBITDA NT Dollar NT$M 3.41 3.23 30% 29% 19% 18% 18% 16% 0.33 (0.29) 0.14 0.12 2020 2021 2022 2023 2024 3Q25YTD 30,085 27,690 BVPS NT Dollar 15,005 23.66 11,571 12,151 11,224 22.08 21.08 20.71 20.37 16.44 2020 2021 2022 2023 2024 3Q25YTD 2020 2021 2022 2023 2024 3Q25 EBITDA EBITDA
Slide 15: Memory CAPEX
Memory CAPEX 40.8 (NT$ B) 15.5 12.7 9.3 7.3 2021 2022 2023 2024 2025(E) Paid Estimated Cash Basis, as of November 5th, 2025 • 3Q25YTD CAPEX was NT$3.6B • 2025 CAPEX is estimated approx. NT$7.3B, in which WFE CAPEX accounts for ~80% 15
Slide 16: Business Recap & Outlook
Business Recap & Outlook Wy © , By’ " a” a Ai » . HN ‘ip, /, fe | ane ii fh "
Slide 17: Memory Revenue Results
Memory Revenue Results QoQ YoY 3Q25 vs. 2Q25 3Q25 vs. 3Q24 CMS CMS Revenue +18.0% +33.3% Bit Shipment Increased mid-single digit% Increased low-sixties% Blended ASP(US$) Increased mid-teens% Decreased low-teens% Flash Flash Revenue +4.2% -5.8% Bit Shipment Increased low-single digit% Increased high-
Slide 18: Memory Business Revenue Breakdown by Application
Memory Business Revenue Breakdown by Application Car & Industrial Communication QoQ +14% QoQ -2% Car & Ind. Comm. NT$M NT$M 28% 22% 4,000 4,000 3Q25 Computer 3,000 3,000 20% Consumer 30% 2,000 2,000 1,000 1,000 0 0 2Q25 3Q25 2Q25 3Q25 Consumer Computer QoQ +16% QoQ +6% Car & Ind. Comm. NT$M NT$M 27%
Slide 19: Flash Business
Flash Business ❑ Rev in 3Q25 increased by 4% QoQ but decreased by 6% YoY ❑ Rev from NOR maintained a steady growth with favorable mix of high-density shares ❑ 3Q25 SLC NAND bit shipment increased by mid-twenties% YoY ❑ Stably leading as WW No.1 NOR Flash supplier 6% 8% 10% 7% 7% 8% 4% 12% 3% 14% 11%
Slide 20: CMS Business
CMS Business ❑ Rev in 3Q25 increased by 18% QoQ and 33% YoY; record high in past 3 years ❑ Bit shipment in 3Q25 increased by low-sixties% YoY ❑ 20nm rev surged in 3Q25, driven by DDR4 sales growth more than doubled QoQ 2% 3% 37% 5% 21% 20% 26% 15% 18% 15% 16% 6% 19% 13% 7% 17% 49% 54% 47% 50% 56% 40
Slide 21: Market and Business Outlook (1)
Market and Business Outlook (1) ❑ Code Storage Flash ❖ Based on higher material cost and end-demand recovery, price for NOR is expected to increase from 3Q25 and onward ❖ Supply for SLC NAND is expected to remain tight in coming quarters, supporting a sustained price increase ❖ Growing demand: Autom
Slide 22: Market and Business Outlook (2)
Market and Business Outlook (2) ❑ Overall Market ❖ World economy is gradually recovering, bringing new business opportunities ❖ US-China tensions continue; Focus on supply chain restructuring and strategic planning ❖ AI boom is driving a sustained memory upward cycle ❑ Winbond Business ❖ Turned prof
Slide 23: Excellence and Forward - Software
Excellence and Forward - Software 23
Slide 24: Positioning of Miraxia & Atfields within Winbond Group
Positioning of Miraxia & Atfields within Winbond Group Winbond Electronics Corporation 100% owned by Winbond Electronics Corporation Atfields Manufacturing Technology Corporation Logic IC 33% (AMTC) 100% owned by Winbond Electronics Corporation 3Q25 Atfields Miraxia Edge Technology Corporation Rev.
Slide 25: An Overview of Atfields
An Overview of Atfields Activity Providing on-site manufacturing solutions and developing and improving manufacturing methods 223 Customer NTCJ, TPSCo, and others Establishment March 1st, 2000 Chairman Yoshitaka Kinoshita HC President Mao-Hsiang Yen Capital 200 million yen As of Aug 30 2025 Head off
Slide 26: The Core Technology of Atfields
The Core Technology of Atfields • Long-term experience in IT/DS/EE/IE in semiconductor factories, provides digital services to improve factory operation efficiency Industrial Engineering ⚫ Technology development ⚫ Production improvement Equipment design/improve IT Infrastructure ⚫ FAB operation ⚫ Fa
Slide 27: Service of Atfields
Service of Atfields • Create customer value through improvements in productivity, quality, cost, and delivery • Also support monitoring and control of manufacturing process and equipment Digital Transformation Solution service (IT+DS) Mfg. Tech. service (IE) Conceptual design for IT Data collection
Slide 28: Sales Revenue of Atfields
Sales Revenue of Atfields • An engineering company driving manufacturing innovation through semiconductor technologies • Atfields works with a wide range of companies, primarily in automotive & electronics industries JYP(M) Sales by Service 4,000 3,000 2,000 1,000 0 2022 2023 2024 Sales Revenue 28
Slide 29: Major Service of Atfields (1/3) System construction and operation
Major Service of Atfields (1/3) *System construction and operation • Provides comprehensive MES (Manufacturing Execution System) to factories, ranging from full-scale development to partial upgrade • Optimize and enhance manufacturing systems and environment Planning Visualization Quality Control In
Slide 30: Major Service of Atfields (2/3) Data utilization
Major Service of Atfields (2/3) *Data utilization • Provides data analysis and monitoring services, using proprietary methods based on expertise in semiconductor mass production STEP1 STEP2 STEP3 Overall check and Factor decomposition Data collection and Building a utilization platform and selection
Slide 31: Major Service of Atfields (3/3) Service track records
Major Service of Atfields (3/3) *Service track records • Atfields supports a broad range of business areas for both domestic and international clients *Number of factories that Atfields has been working for (excluding group companies), as of August 2025 Number of factories IT DS IE PE Customer’s dom
Slide 32: An Overview of Miraxia
An Overview of Miraxia Activity Embedded Software design, System design Other Software development environment design Hardwarea License & Module sales 33 22 Customer Panasonic, others Establishment January 10th, 1997 HC Chairman Cheng-Kung Lin 409 President Shogo Nakazawa Software Capital 200 millio
Slide 33: The Core Technology of Miraxia (DSI)
The Core Technology of Miraxia (DSI) • Device system integration skills to maximize device performance and streamline application software design MIRAXIA’s strength area Core skill of MIRAXIA (Device system integration) Miraxia has a lot of experience to develop embedded Based on wide range of knowl
Slide 34: Service of Miraxia
Service of Miraxia • Compare with ordinal software vendor, Miraxia has many experience to involve in not only design based on clearly defined requirement but also upstream design and maintenance too Covered by Miraxia Main area covered by ordinal s/w vender Advanced design MP design Maintenance Rapi
Slide 35: Sales Revenue of Miraxia
Sales Revenue of Miraxia • Grown to a wide range of embedded system design, taking advantage of our design skills and technology acquired through designing of semiconductors and embedded equipment • Currently Automotive & Industrial fields are our focus sectors JYP(M) Sales by Core Business 7,000 6,
Slide 36: Major Recent Design Record - Miraxia (1/3)
Major Recent Design Record - Miraxia (1/3) • Miraxia has many s/w design experience in Vehicle market Safety/Autonomous driving - ADAS ECU Cockpit/Connecting - Camera module Power train/ Body control - Gateway ECU - Smart mirror - Engine ECU - Cockpit ECU - Driver monitoring - Inverter - IVI(In-Vehi
Slide 37: Major Recent Design Record - Miraxia (2/3)
Major Recent Design Record - Miraxia (2/3) • Miraxia has extensive experience in PLC development, contributing to development of smart PLC PLC* for Factory Automation FA equipment Server /device Monitor Sensors /Controller Packet analysis Sample FBD program design Architecture design Function design
Slide 38: Major Recent Design Record - Miraxia (3/3)
Major Recent Design Record - Miraxia (3/3) • Miraxia provides power electronics design solutions with s/w, h/w design references and engineering service Design Record METC provides - Reference design Company A Company B Company C with hardware & software Server UPS (3kW) V2H (6kW) V2X (10kW) Softwar
Slide 39: mi) pst Y
mi) pst 1 Y a Vind 4’ y mf
Slide 40: Thank you
Thank you mam Winbond