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WIN Semiconductors Company Presentation Aug – Sept 2026 WIN Semiconductors Confidential
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Safe Harbor Notice This presentation contains certain forward-looking statements that are based on current expectations and are subject to known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements. Except as required by law, we undertake no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise. WIN Semiconductors Confidential 2
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ESG Achievements WIN recognized in DJSI World Index for the sixth consecutive year. (2020~2025) WIN has been included in the S&P Global Sustainability Yearbook for the sixth consecutive year. (2020~2025) WIN ranked in the top 5% among TPEx-listed companies for the Corporate Governance Evaluation for the tenth consecutive year. (2015~2025) ISS ESG Rating: Awarded “Prime” status for two consecutive years (2024–2025) WIN won the 17th TCSA Sustainability Report - Gold Award. 2024 MSCI ESG Rating: A 2025 4th Net-Zero Industry Competitiveness Award: Excellence Award 3
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Outline Market Outlook Financial Review & Guidance Q&A WIN Semiconductors Confidential 4
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MARKET OUTLOOK WIN Semiconductors Confidential 5
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Annual Revenue Share by Applications Cellular 35-40% Infra. 25-30% Wi-Fi 15-20% Optical 13% 2024 Cellular 30-35% Infra. 30-35% Wi-Fi 15-20% Optical 11% 2025
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2025 Review • Refocused on mid-high and premium models. 2024 2025 Cellular -20% 2024 2025 Wi-Fi 11% • The Wi-Fi 7 market continues to penetrate into market. • Wi-Fi 6 adoption continues to expand, gradually replacing Wi-Fi 5 2024 2025 Infrastructure 5% 2024 2025 OE -15% • Propelled by new satellite launch with new freq. spectrum in 2025. • Contribution from GaAs optical driver IC. • New player took some market share on SP 3D Sensing
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2026 Market Outlook Cellular Wi-Fi Infra. OE
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0.0 200.0 400.0 600.0 800.0 1,000.0 1,200.0 1,400.0 2023 2024 2025 2026 2027 2028 2029 2030 2031 6G 5G LTE 5G Adoption Rate Keep Rising TAM impacted by insufficient memory for smartphone shipment. WIN keeps focusing on mid-high and premium models. Cellular Penetration Rate 2025 2026 2027 2028 5G 67.9% 72.0% 75.4% 78.3% 6G 0.0% 0.0% 0.0% 0.0% Source: TSR 2025 -5.5% Shipment by Tier 43.6% 42.6% 39.7% 24.1% 24.2% 25.2% 30.8% 32.5% 34.8% 2024 2025 2026 Premium Mid/High end Low end M unit
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Wi-Fi 7 is the Main Growth Engines The market is driven by the adoption of Wi-Fi 6 and the upgrade to Wi-Fi 7. The Wi-Fi 7 market continues to grow in 2026 for both cellular and router segments. 0.0 1,000.0 2,000.0 3,000.0 4,000.0 5,000.0 2024 2025 2026 2027 2028 2029 2030 2031 M Units Wi-Fi Device Market Forecast by Standard, 2024-2031 WiFi 6 WiFi 7 WiFi 8 Source: TSR 2025
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Base Station Market Forecast Capital expenditures of operator are projected to decline at a CAGR of 2%. Source: Yole, TDIA and WIN 0 200 400 600 800 1000 1200 1400 2024 2025F 2026F Base Station Unit (k unit) Global 5G Base Station Forecast -2%
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1.6T Optical GaAs Driver in AI Datacenter GaAs driver market growth is driven by AI datacenter booming in 2026. Demand of GaAs Optical Driver for OT Market Source: WIN Semi. 0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 2025 2026 K unit
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VCSEL Sensing Market 800.0 900.0 1,000.0 1,100.0 1,200.0 2025 2026 Total Sensing VCSEL Device Forecast Source: TrendForce 2026 M unit Sensing tech. is driven by human pursue a safe, environmentally friendlier, and more immersive experience lifestyle. Market growth is driven by consumer, and adopted in automotive applications. 3D vision by LiDAR OMS/DMS Face ID Lawn Mower
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-Growth Strategy- AI Networking
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AI Satellite Key Growth Engines for Compound Semi.
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Source: Techinsights Market Data: RF/Analog March,2025 LEO Satellite is Booming
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Satellite Connectivity is Expanding New Freq. band (E/V) is being adopted in satellites to expand capacity from 2025 to 2026. Emerging opportunities for satellite-to-smartphone (direct to cell) services. Satellite to Gateway Ku/Ka-band (17.8-19.3/27.5-30GHz) E-band (71-86GHz) V-Band (New) (37.5-40, 47.2-50.2GHz) Gateway to Satellite Ku/Ka-band (17.8-19.3/27.5-30GHz) E-band (71-86GHz) V-Band (New) (37.5-40, 47.2-50.2GHz) Gateway Cell phone UT <6GHz Infrastructure PtP
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Spectrum Proliferation is the Growth Engine Time E-Band 71-86GHz W-Band 75-110GHz V-Band 37.5-40GHz, 47.2-50.2GHz Coming up Ramp up Production
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WIN’s leading T ech. for Satcom in W-Band GaAs GaN 4V PP10 GaAs pHEMT • 0.1μm EBL D-pHEMT • Low Parasitic • 2mil Substrate TSV NP10 • 0.1μm EBL GaN HEMT • 2/4 mil Substrate TSV with COV • High Power Efficiency • High Linearity • QFN/Flip-Chip Cu Pillar BS via for 4 mil Sub 100 nm Gate
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AI Satellite Key Growth Engines for Compound Semi.
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AI Propels Compound Semi. Growth - 20.00 40.00 60.00 80.00 100.00 120.00 140.00 2024 2025 2026 2027 2028 2029 2030 M Units Optical transceivers market forecast
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Largest Capacity with Richest Manufacturing Experience in 6’’ Global Customer Partnership Turn-Key for Speeding Development Broad and Advanced Technologies WIN’s Competitive Advantages for Optical in AI
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Optical Device from Datacom to Telecom <100m CW-DFB VCSEL EML InP PIC PD >10km Datacom Telecom Mass Production Ongoing Qualification
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CW-DFB Development Roadmap Data rate/lane Laser power 70 mW 100 mW 200 mW 400 mW
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WIN’s Advanced Turn-Key Service WIN provides turn-key service to accelerate customers’ development. BE Cleave & Facet Coating Wafer Testing 100% Wafer AOI Foundry Process Base Epi Growth & Re-growth Customer Requests • Epi structure • Chip layout design • BE service • Testing • AOI
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WIN possesses the world’s largest GaAs 6-inch wafer capacity, technology, and expertise. By leveraging the technology and experience from 6-inch GaAs capability, WIN is now developing 6-inch InP capability with the following advantages: WIN’s advantages in 6-inch process capability from GaAs to InP • Faster time-to-market • Lower entry barriers (Leveraging deep and extensive production experience of 6-inch compound semiconductors) • Limited capex required (Leveraging existing 6-inch equipments and facilities)
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AI Associated Sensing Applications AI-adopted devices/vehicles with 3D sensing technologies for innovative future life Delivery Lawn Mower 2D Addressable VCSEL Headset AR Glass Autonomous Vehicle
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Worldwide NO.1 Compound Semiconductors Foundry Provider AI
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FINANCIAL REVIEW & GUIDANCE WIN Semiconductors Confidential 29
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Revenue & Margin Trend Source: Company. 2Q26 consolidated revenue was NT$5,257 mn, up 15% QoQ and 39% YoY, in line with expectations. Reflecting the net impact of a more favorable product mix and higher shipment volumes, partially offset by margin dilution during the initial ramp-up of new products, individual GM was 32.6% in 2Q26, up 0.5 pp sequentially. Consolidated GM was 28.2%, also improving by 1.9 pp sequentially. With opex remaining well controlled, OPM reached 14.1%, up 4.8 pp compared to the previous quarter . WIN Semiconductors Confidential 30 -30% -20% -10% 0% 10% 20% 30% 40% 50% 0 1,000 2,000 3,000 4,000 5,000 6,000 3Q24 4Q24 1Q25 2Q25 3Q25 4Q25 1Q26 2Q26 Quarterly revenue trend Revenue YoY % NT$M -20% -10% 0% 10% 20% 30% 40% 3Q24 4Q24 1Q25 2Q25 3Q25 4Q25 1Q26 2Q26 Quarterly margin trend Gross margin Operating margin Net margin
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Earnings Trend Source: Company. Driven by higher non-op income, net income attributable to the parent company increased to NT$977 mn in 2Q26, from NT$533 mn in 1Q26. EPS rose to NT$2.3, from NT$1.26 in the previous quarter . WIN Semiconductors Confidential 31 -600 -400 -200 0 200 400 600 800 1,000 1,200 3Q24 4Q24 1Q25 2Q25 3Q25 4Q25 1Q26 2Q26 Earnings & growth trend Operating profit Profit attributable to owners of parent NT$MNT$MNT$M (1.00) (0.50) 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3Q24 4Q24 1Q25 2Q25 3Q25 4Q25 1Q26 2Q26 NT$ EPS
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Product Mix Source: company. * Others: Revenue not attributable to main product segments and additional revenue being consolidated in accordance with IFRS. WIN Semiconductors Confidential 32 Cellular 30-35% Infra. 30-35% Wi-Fi 15-20% Others* 13% 2Q25 Cellular 30-35% Infra. 30-35% Wi-Fi 15-20% Optical 5-10% Others* 6% 1Q26 Cellular 30-35% Infra. 30-35% Wi-Fi 10-15% Optical 10-15% Others* 5% 2Q26
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Guidance We expect 3Q26 consolidated revenue to increase low-teens QoQ. We expect 3Q26 consolidated gross margin to be around the level of low- thirties. WIN Semiconductors Confidential 33
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FINANCIAL SUMMARY WIN Semiconductors Confidential 34
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Unit: NTD Million 2Q'25 1Q'26 2Q'26 (unaudited) QoQ YoY Net revenue 3,780 4,590 5,257 +15% +39% Gross profit 698 1,209 1,485 +23% +113% Gross margin (%) 18.5% 26.3% 28.2% Operating expenses (817) (778) (743) -5% -9% Operating expenses rate (%) -22% -17% -14% Operating income (loss) (119) 431 742 +72% – Operating margin (%) -3.1% 9.4% 14.1% Non-operating incomes and expenses (432) 101 447 Income (Loss) before income tax (551) 532 1,188 +123% – Income tax (expense) income 61 (83) (284) Net income (loss) (490) 449 905 +102% – Net margin (%) -13.0% 9.8% 17.2% Other comprehensive income, net 541 (301) 1,837 Comprehensive income 50 148 2,742 +1758% +5339% Profit (loss) attributable to owners of parent (421) 533 977 +83% – EPS (NT$) (0.99) 1.26 2.30 +83% – ROE(%) -5% 5% 9% Approx. Utilization (%) 45% 60% 65% Depreciation 1,038 772 760 CAPEX 295 884 129 Consolidated Statements of Comprehensive Income – Quarterly WIN Semiconductors Confidential 35
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Unit: NTD Million 2025H1 2026H1 (unaudited) YoY Net revenue 7,356 9,847 +34% Gross profit 1,296 2,694 +108% Gross margin (%) 17.6% 27.4% Operating expenses (1,632) (1,521) -7% Operating expenses rate (%) -22% -15% Operating income (loss) (336) 1,173 – Operating margin (%) -4.6% 11.9% Non-operating incomes and expenses (276) 547 Income (Loss) before income tax (612) 1,720 – Income tax (expense) income 58 (367) Net income (loss) (554) 1,353 – Net margin (%) -7.5% 13.7% Other comprehensive income, net (831) 1,536 Comprehensive income (1,384) 2,889 – Profit (loss) attributable to owners of parent (405) 1,510 – EPS (NT$) (0.96) 3.56 – ROE(%) -2% 7% Approx. Utilization (%) 40% 65% Depreciation 2,144 1,531 CAPEX 387 1,013 Consolidated Statements of Comprehensive Income - YTD WIN Semiconductors Confidential 36
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Unit: NTD Million 2Q'25 2Q'26 (unaudited) 2025H1 2026H1 (unaudited) Foreign exchange gains (losses) (246) 144 (133) 326 Gains (losses) on disposals of property, plant and equipment 26 - 26 - Gains on financial liabilities at amortised cost - - - - Gain (losses) on financial assets (liabilities) at fair value through profit or loss, net (202) 29 (125) (97) Share of gians (losses) of associates and joint ventures accounted for using equity method 88 270 157 315 Finance costs (168) (143) (342) (283) Others 70 147 140 287 Total (432) 447 (276) 547 Non-operating Items WIN Semiconductors Confidential 37
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$ % $ % $ % Cash and cash equivalents 5,460 9% 6,321 10% 5,320 8% Current financial assets at fair value through profit or loss 174 0.3% 229 0.4% 263 0.4% Notes and accounts receivable, net 1,255 2% 1,552 3% 1,887 3% Inventories 4,903 8% 5,140 8% 7,584 12% Long-term investments 18,493 30% 20,574 34% 22,631 36% Net property, plant and equipment 27,233 45% 22,130 37% 21,744 34% Total Assets 61,132 100% 60,565 100% 63,490 100% Current liabilities 5,386 6,475 9,750 Current portion of long-term borrowings 799 - 3,013 Long-term borrowings 17,528 12,264 8,973 Total Liabilities 23,800 39% 19,274 32% 19,243 30% Common stock 4,239 4,239 4,239 Total equity attributable to owners of parent 36,532 40,920 43,810 Total Equity 37,332 61% 41,291 68% 44,247 70% Book value per share (NT$)1 86.17 96.52 103.34 Key Indices Current ratio (Current assets / Current liabilities) 227% 223% 162% Debt ratio (Total liabilities / Total assets) 39% 32% 30% (Unit: NTD Million) Major Item 2025/6/30 2026/3/31 2026/6/30 (unaudited) Consolidated Balance Sheets 1 Book value per share = total equity attributable to owners of parent / number of common shares WIN Semiconductors Confidential 38
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Q & A For more information regarding WIN www.winfoundry.com For all inquiries, suggestions, and comments ir@winfoundry.com WIN Semiconductors Confidential 39