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S MCO Results for Second Quarter of FY 2026 ( Ended June 30 , 2026 ) August 6 , 2026 SUMCO CORPORATION ( Code : 3436 ) ( LEI : 353800SUSRUOM0V6KU92 ) SUMCO CORPORATION © SUMCO CORPORATION . All rights reserved .
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SUMCO CORPORATION Notes Regarding the Forecasts Aug. 6, 2026 2Q-2026 Results 2 This material is prepared for the purpose of continuous disclosure to general shareholders and investors and will not constitute an offer or solicitation of securities of the Company in any states or jurisdictions. The estimate, expectation, forecast and other future information is prepared based on the information which is available for the Company as of today and on certain assumptions and qualifications (which includes our subjective judgment) and the actual financial performance or result may be substantially different from such future information contained in the material due to risk factors including domestic and global economic conditions, trend of semiconductor market and foreign exchanges.
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SUMCO CORPORATION Contents Aug. 6, 2026 2Q-2026 Results 3 ■ Summary and Market Environment ■ 2Q-2026 Consolidated Business Result • Summary of Consolidated Business Result • Analysis of Changes in Operating Profit • Consolidated Balance Sheet and Consolidated Cash-Flow ■ 3Q-2026 Consolidated Business Forecast • Consolidated Business Forecast • Analysis of Changes in Operating Profit ■ Reference Materials
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SUMCO CORPORATION Summary and Market Environment Jiro Ryuta Representative Director, President Aug. 6, 2026 2Q-2026 Results
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SUMCO CORPORATION 1-1. Summary Aug. 6, 2026 2Q-2026 Results 5 (Note) Profit attributable to owners of parent ■ 2Q-2026 Consolidated Business Result ■ 3Q-2026 Consolidated Business Forecast (Billions of Yen) 2Q-2026 2Q-2026 Forecast Actual Net Sales 112.0 113.6 +1.6 Operating Profit (2.5) (1.1) +1.4 Ordinary Profit (6.5) (4.2) +2.3 Profit (Note) (7.0) (4.4) +2.6 EBITDA margin (%) 26.0% 26.9% +0.9% Exchange Rate (Yen/US$) 160.0 159.9 (0.1) Change (Billions of Yen) 2Q-2026 3Q-2026 Actual Forecast Net Sales 113.6 118.0 +4.4 Operating Profit (1.1) 0.0 +1.1 Ordinary Profit (4.2) 1.0 +5.2 Profit (Note) (4.4) 0.0 +4.4 EBITDA margin (%) 26.9% 28.6% +1.7% Exchange Rate (Yen/US$) 159.9 160.0 +0.1 Change
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SUMCO CORPORATION 1-2. Shareholder Return (Forecast) Aug. 6, 2026 2Q-2026 Results 6 Dividends were determined after an overall consideration of profit levels, future outlook, funding needs for capital investment and other purposes, free cash flow, EBITDA, the status of dividend resources, and other factors. * The amount of year-end dividend per share for fiscal year 2026 has yet to be determined. FY2022 (Dec-2022) FY2023 (Dec-2023) FY2024 (Dec-2024) FY2025 (Dec-2025) FY2026 (Dec-2026) Interim 36 42 15 10 10 Year-end 45 13 6 10 - Total 81 55 21 20 - Interim 12.6 14.7 5.2 3.5 3.5 Year-end 15.7 4.5 2.1 3.5 - Total 28.3 19.2 7.3 7.0 - Dividends per share for common stocks (Yen) Dividends payment (Billions of Yen)
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SUMCO CORPORATION （Source： SUMCO’s estimation) 2-1. Silicon Wafer Trend Aug. 6, 2026 2Q-2026 Results 7 ■ 300 mm Wafer Trend ■ 200 mm Wafer Trend 0 2,000 4,000 6,000 8,000 10,000 1Q 2Q 3Q 4Q 2019 2020 2021 2022 2023 2024 2025 2026 (千枚/月)（k wafers/month） 0 2,000 4,000 6,000 8,000 1Q 2Q 3Q 4Q 2019 2020 2021 2022 2023 2024 2025 2026 (千枚/月)（k wafers/month）
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SUMCO CORPORATION 2-2. Customers’ 300 mm Wafer Inventory Trend Aug. 6, 2026 2Q-2026 Results 8 ■ 300 mm Wafer Inventory Trend for Major Customers 14/1Q 2Q 3Q 4Q 15/1Q 2Q 3Q 4Q 16/1Q 2Q 3Q 4Q 17/1Q 2Q 3Q 4Q 18/1Q 2Q 3Q 4Q 19/1Q 2Q 3Q 4Q 20/1Q 2Q 3Q 4Q 21/1Q 2Q 3Q 4Q 22/1Q 2Q 3Q 4Q 231Q 2Q 3Q 4Q 24/1Q 2Q 3Q 4Q 25/1Q 2Q 3Q 4Q 26/1Q 2Q Input volume Purchase volume Customer inventory volume Turnover days （Source： SUMCO’s estimation)
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SUMCO CORPORATION 2-3. Customers’ 300 mm Wafer Inventory (Logic/Memory) Aug. 6, 2026 2Q-2026 Results 9 ■ 300 mm Wafer Inventory Trend for Major Customers’ Logic Applications ■ 300 mm Wafer Inventory Trend for Major Customers’ Memory Applications （Source： SUMCO’s estimation) 14/1Q 2Q 3Q 4Q 15/1Q 2Q 3Q 4Q 16/1Q 2Q 3Q 4Q 17/1Q 2Q 3Q 4Q 18/1Q 2Q 3Q 4Q 19/1Q 2Q 3Q 4Q 20/1Q 2Q 3Q 4Q 21/1Q 2Q 3Q 4Q 22/1Q 2Q 3Q 4Q 23/1Q 2Q 3Q 4Q 24/1Q 2Q 3Q 4Q 25/1Q 2Q 3Q 4Q 26/1Q 2Q Input volume Purchase volume Customer inventory volume Turnover days 14/1Q 2Q 3Q 4Q 15/1Q 2Q 3Q 4Q 16/1Q 2Q 3Q 4Q 17/1Q 2Q 3Q 4Q 18/1Q 2Q 3Q 4Q 19/1Q 2Q 3Q 4Q 20/1Q 2Q 3Q 4Q 21/1Q 2Q 3Q 4Q 22/1Q 2Q 3Q 4Q 23/1Q 2Q 3Q 4Q 24/1Q 2Q 3Q 4Q 25/1Q 2Q 3Q 4Q 26/1Q 2Q Input volume Purchase volume Customer inventory volume Turnover days
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SUMCO CORPORATION 3. Market Environment Aug. 6, 2026 2Q-2026 Results 10 ■ 2Q-2026 Volume ・300 mm wafer shipments increased with strong demand for leading-edge logic and memory for AI. ・Shipments of 200 mm wafers also increased, helped by AI data center-related demand. Pricing ・Long-term contract prices were honored. Negotiations have begun on spot price revision. ■ 3Q-2026 Forecast Volume ・Strong AI-driven demand should continue for 300 mm wafers centering around leading-edge logic and memory. Non-leading-edge logic is on track for recovery as customer inventory drawdown proceeds. ・200 mm should recover gradually overall despite demand variance among customers and products. Pricing ・Long-term contract prices are being maintained. Moves toward spot price revision are under way. ■ Outlook ・High growth is expected to continue in the semiconductor market, driven by ongoing strong AI-related demand. ・The silicon wafer market should see continued demand growth for 300 mm, driven by leading-edge products for AI data centers. 200 mm and smaller wafers are expected to see a gradual demand recovery as inventory drawdowns proceed.
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SUMCO CORPORATION 4-1. The Expanding Roles of CPUs with the Advance of AI 11 AI is advancing, from generative AI to agentic AI. Along with this advance, the volume of information handled and complexity of processing are increasing, expanding the roles of the CPUs that control this processing. The memory capacity needed by CPUs is also expected to grow. Generative AI Information volume handled Agentic AI Processing complexity Physical AI Aug. 6, 2026 2Q-2026 Results
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SUMCO CORPORATION 4-2. From Generative AI to Agentic AI 12 Generative AI Agentic AI AI capability Ask chat-style questions, etc. → AI answers by generating natural language text or other content Tell it what you want to do (goal). → AI makes plans and carries them out on its own, repeatedly evaluating and adjusting the plans as it proceeds toward the goal. Applications Supporting certain tasks such as document creation and summarization Taking over entire operations from investigation and analysis to creation of materials CPU roles AI model (GPU) data input/output AI model input/output ＋ Plan task management ＋ Use of tools ＋ Compiling information → The increase in CPU data processing volume with agentic AI is expected to greatly increase memory needs. → Semiconductor demand due to AI is expanding from GPU and HBM to CPU, DRAM, and NAND. Aug. 6, 2026 2Q-2026 Results
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SUMCO CORPORATION 4-3. Change in Server Demand Forecast Aug. 6, 2026 2Q-2026 Results 13 With the coming of agentic AI, the outlook for server demand is being revised upward. 0 5 10 15 20 25 2024 2025 2026 2027 2028 2029 2Q-2025 Forecast 2Q-2026 Forecast (million units) （Source: SUMCO estimates based on research companies' data)
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SUMCO CORPORATION 0 200 400 600 800 1,000 1,200 2024 2025 2026 2027 2028 2029 2Q-2025 Forecast 2Q-2026 Forecast Aug. 6, 2026 2Q-2026 Results 14 4-4. Change in Server Memory Demand Forecast Agentic AI will mean an increase in DRAM volume needs to deal with repetitive complex processing. Demand for fast, large-capacity SSD for servers will grow due to the rapid increase in stored data. 0 10 20 30 40 50 60 2024 2025 2026 2027 2028 2029 2Q-2025 Forecast 2Q-2026 Forecast DRAM(1B GB) (1B GB) NAND （Source: SUMCO estimates based on research companies' data)
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SUMCO CORPORATION 2,083 2,275 2,488 0 1,000 2,000 3,000 4,000 2024 2025 2026 2027 2028 2029 Leading-edge Logic DRAM/HBM NAND ( k wafers/month) 4-5. Demand Outlook for Silicon Wafers for Servers Aug. 6, 2026 2Q-2026 Results 15 With the upward revision in server demand forecast, demand for leading-edge logic and memory is also expected to increase greatly. 2Q-2026 Forecast2Q-2025 Forecast → SUMCO will work to upgrade our existing manufacturing equipment, better to meet demand for leading-edge wafers as high growth continues. （Source: SUMCO estimates based on research companies' data)
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SUMCO CORPORATION 2Q-2026 Consolidated Business Result Shinichi Kubozoe Representative Director, Executive Vice President Chief Financial Officer Aug. 6, 2026 2Q-2026 Results
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SUMCO CORPORATION 5-1. Summary of Consolidated Business Result Aug. 6, 2026 2Q-2026 Results 17 *1. EBITDA = Operating profit + Operating Depreciation *2. If the yen appreciates by 1 yen against the US dollar, operating profit of SUMCO will decrease by 1.2 billion yen per year (Billions of Yen) 2Q-2025 2Q-2026 Actual (6 months) (6 months) １Q ２Q Total Net sales 205.3 101.4 113.6 215.0 +9.7 Operating profit 7.4 (5.2) (1.1) (6.3) (13.7) Non-operating income and expenses (2.7) (2.7) (3.1) (5.8) (3.1) Ordinary profit 4.7 (7.9) (4.2) (12.1) (16.8) Income taxes (1.4) (0.6) (0.1) (0.7) +0.7 Profit attributable to non-controlling interests (0.3) 0.1 (0.1) 0.0 +0.3 Profit attributable to owners of parent 3.0 (8.4) (4.4) (12.8) (15.8) Capital expenditure (Acceptance basis) 51.9 9.4 10.0 19.4 (32.5) Depreciation 49.4 30.8 33.6 64.4 +15.0 Operating depriciation 48.7 28.7 31.6 60.3 +11.6 EBITDA (*1) 56.1 23.4 30.5 53.9 (2.2) Exchange rate (Yen/US$) (*2) 149.5 155.4 159.9 157.7 +8.2 Operating margin (%) 3.6% (5.2%) (1.0%) (3.0%) (6.6%) EBITDA margin (%) 27.3% 23.1% 26.9% 25.1% (2.3%) ROE (%) 0.8% (5.8%) (3.2%) (4.5%) (5.3%) Basic Earnings per share (Yen) 8.81 (24.22) (12.66) (36.87) (45.68) Change
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SUMCO CORPORATION ■ 1Q-2026 Actual → 2Q-2026 Actual ■ 2Q-2025 Actual → 2Q-2026 Actual 5-2. Analysis of Changes in Operating Profit Aug. 6, 2026 2Q-2026 Results 18 (Billions of Yen) 1Q-2026 2Q-2026 Actual Actual Net Sales 101.4 113.6 +12.2 Operating Profit (5.2) (1.1) +4.1 Exchange Rate (Yen/US$) 155.4 159.9 +4.5 Change (Billions of Yen) 2Q-2025 2Q-2026 Act (6 months) Act (6 months) Net Sales 205.3 215.0 +9.7 Operating Profit 7.4 (6.3) (13.7) Exchange Rate (Yen/US$) 149.5 157.7 +8.2 Change (5.2) (0.6) (2.9) +6.0 +1.6 (1.1) 1Q-2026 OP Actual (3 months) DepreclationCost Exchange rate (Inc NT $) 2Q-2026 OP Actual (3 months) Sales-related variance and others ¥4.1 billion Increase ¥13.7 billion Decrease 2Q-2025 OP Actual (6 months) Depreclation Cost Exchange rate (Inc NT $) 2Q-2026 OP Actual (6 months) Sales-related variance and others
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SUMCO CORPORATION ■ Consolidated Balance Sheet ■ Consolidated Cash-Flow 5-3. Balance Sheet and Cash-Flow (Consolidated) Aug. 6, 2026 2Q-2026 Results 19 (Billions of Yen) 2Q-2026 (6months) Profit before income taxes (12.1) Depreciation 64.4 Subtotal 52.3 (6.0) 0.2 Net cash provided by operating activities 46.5 (19.4) (6.1) Net cash used in investing activities (25.5) Free cash-flow 21.0 (3.5) 11.4 7.6 36.5 Net increase (decrease) in cash and cash equivalents Decrease (increase) in inventories Others, net Capital expenditure (Acceptance basis) Others, net Cash flow from financing activities, etc. Dividends paid Net proceeds from borrowings Others, net (Billions of Yen) End of End of Dec-2025 Jun-2026 Cash and deposits 75.2 111.7 +36.5 Notes and accounts receivable 89.9 94.5 +4.6 Finished goods and WIP 58.1 59.3 +1.2 Raw materials and supplies 192.4 200.5 +8.1 Tangible and intangible assets 670.6 630.6 (40.0) Deferred tax assets 5.3 6.2 +0.9 Other assets 36.4 33.8 (2.6) Total Assets 1,127.9 1,136.6 +8.7 Interest-bearing debt 353.7 367.3 +13.6 Other liabilities 126.5 128.3 +1.8 Total Liabilities 480.2 495.6 +15.4 Share capital 199.0 199.0 - Capital surplus 86.1 88.4 +2.3 Retained earnings 260.4 244.1 (16.3) Non-controlling interests etc. 102.2 109.5 +7.3 Total Net Assets 647.7 641.0 (6.7) Equity-to-asset ratio (%) 51.3% 50.0% (1.3%) Net assets per share (Yen) 1,653.9 1,624.5 (29.4) D/E ratio (gross) 0.61x 0.65x +0.04x D/E ratio (net) 0.48x 0.45x (0.03)x Change
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SUMCO CORPORATION 3Q-2026 Consolidated Business Forecast Aug. 6, 2026 2Q-2026 Results
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SUMCO CORPORATION 6-1. 3Q-2026 Consolidated Business Forecast Aug. 6, 2026 2Q-2026 Results 21 *1. If the yen appreciates by 1 yen against the US dollar, operating profit of SUMCO will decrease by 1.2 billion yen per year. (Billions of Yen) 3Q-2025 Actual 1Q ACT 2Q ACT 3Q FCST Total (9 months) (3 months) (3 months) (3 months) (9months) Net sales 304.4 101.4 113.6 118.0 333.0 +28.6 Operating profit 5.8 (5.2) (1.1) 0.0 (6.3) (12.1) Non-operating income and expenses (3.7) (2.7) (3.1) 1.0 (4.8) (1.1) Ordinary profit 2.1 (7.9) (4.2) 1.0 (11.1) (13.2) Income taxes (2.3) (0.6) (0.1) (0.7) (1.4) +0.9 Profit attributable to non-controlling interests (0.7) 0.1 (0.1) (0.3) (0.3) +0.4 Profit attributable to owners of parent (0.9) (8.4) (4.4) 0.0 (12.8) (11.9) Depreciation 80.0 30.8 33.6 35.4 99.8 +19.8 Operating depriciation 77.6 28.7 31.6 33.7 94.0 +16.4 EBITDA 83.4 23.4 30.5 33.7 87.6 +4.2 Exchange rate (Yen/US$) 148.7 155.4 159.9 160.0 158.4 +9.7 Operating margin (%) 1.9% (5.2%) (1.0%) 0.0% (1.9%) (3.8%) EBITDA margin (%) 27.4% 23.1% 26.9% 28.6% 26.3% (1.1%) ROE (%) (0.3%) (5.8%) (3.2%) (1.5%) (3.2%) (2.9%) Basic Earnings per share (Yen) (2.85) (24.22) (12.66) 0.00 (36.60) (33.75) Change 3Q-2026 (*1)(*1)
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SUMCO CORPORATION (1.1) (3.9) (2.1) +7.1 +0.0 0.0 ■ 2Q-2026 Actual → 3Q-2026 Forecast ■ 3Q-2025 Actual → 3Q-2026 Forecast 6-2. Analysis of Changes in Operating Profit Aug. 6, 2026 222Q-2026 Results ¥12.1 billion Decrease (Billions of Yen) 2Q-2026 3Q-2026 Actual Forecast Net Sales 113.6 118.0 +4.4 Operating Profit (1.1) 0.0 +1.1 Exchange Rate (Yen/US$) 159.9 160.0 +0.1 Change (Billions of Yen) 3Q-2025 3Q-2026 Act (9 months) Fcst (9 months) Net Sales 304.4 333.0 +28.6 Operating Profit 5.8 (6.3) (12.1) Exchange Rate (Yen/US$) 148.7 158.4 +9.7 Change 3Q-2025 OP Actual (9 months) Depreclation Cost Exchange rate (Inc NT $) 3Q-2026 OP Forecast (9 months) Sales-related variance and others ¥1.1 billion Increase 2Q-2026 OP Actual (3 months) Depreclation Cost Exchange rate (Inc NT $) 3Q-2026 OP Forecast (3 months) Sales-related variance and others
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SUMCO CORPORATION Reference Materials Aug. 6, 2026 2Q-2026 Results
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SUMCO CORPORATION Quarterly Trend Aug. 6, 2026 2Q-2026 Results 24 9.3 12.4 14.8 15.0 23.4 26.3 30.2 29.7 25.9 20.8 15.1 11.2 8.6 12.2 9.1 7.0 5.9 1.5 (1.6) (4.5) (5.2) (1.1) 0.0 20.8 24.7 28.5 30.3 36.8 40.6 45.7 45.8 40.1 37.4 34.2 32.9 26.1 29.7 29.0 29.2 28.6 27.5 27.3 29.0 23.4 30.5 33.7 75.9 81.8 86.7 91.2 100.4 107.0 116.2 117.4 109.9 110.7 100.2 105.1 93.5 104.7 98.4 100.0 102.4 102.9 99.1 105.2 101.4 113.6 118.0 27.4% 30.3% 32.8%33.2% 36.7%37.9%39.4%38.3% 36.5% 33.8%34.2% 31.3% 27.9%28.4%29.4%29.3%28.0%26.7%27.6%27.5% 23.1% 26.9% 28.6% 0% 10% 20% 30% 40% 50% 60% 70% (15) 5 25 45 65 85 105 125 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q FY2021 FY2022 FY2023 FY2024 FY2025 2026 Operating Profit EBITDA Net Sales EBITDA Margin %(Billions of Yen) FCST
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SUMCO CORPORATION 25 Empowering the World through Silicon Wafers