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©2026 KOA CORPORATION. All Rights Reserved. Supplementary Materials on Financial Performance for the Six Months Ended September 30, 2026 October 23, 2026 KOA Corporation Note 1: This document is a translation of the original Japanese document. In the case of any discrepancy between this translated document and the original Japanese document, the latter shall prevail. Note 2: All references to FY03/XXXX in this document refer to the financial year ending on March 31, XXXX.
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©2026 KOA CORPORATION. All Rights Reserved. Financial Performance Highlights 2 Net sales ¥43.6 billion Operating profit ¥3.7 billion ‒ Operating profit increased by ¥2.4 billion year on year. ‒ Higher net sales, a weaker yen and control of fixed costs contributed to profit growth, despite higher raw material prices. FY03/27 H1 Results overview Ordinary profit ¥4.0 billion ‒ Ordinary profit increased by ¥2.4 billion year on year. Net profit ¥5.8 billion ‒ Net profit increased by ¥4.7 billion year on year. ‒ The Company recognized extraordinary income of ¥3.1 billion in compensation for the factory relocation of its consolidated subsidiary, KOA ELECTRONICS (TAICANG) CO. LTD. ‒ The Company recognized a deferred tax benefit of ¥750 million following the resolution to dissolve and liquidate its consolidated subsidiary, VIA electronic GmbH. ‒ Net sales reached a record high for a six-month period, increasing by ¥9.0 billion year on year. ‒ Growth was particularly strong in the automotive market in China, distributors in Europe, the U.S., and China, AI- related equipment in Asia, and industrial equipment in Japan.
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©2026 KOA CORPORATION. All Rights Reserved. Summary of First-Half Results 3 FY03/26 H1 FY03/27 H1 YoY (Billions of ¥) (%) (Billions of ¥) (%) (Billions of ¥) (%) Net sales 34.6 100.0 43.6 100.0 +9.0 +26.0 Operating profit 1.3 3.8 3.7 8.6 +2.4 +186.4 Ordinary profit 1.6 4.7 4.0 9.1 +2.4 +146.2 Profit (loss) attributable to owners of parent 1.2 3.3 5.8 13.3 +4.7 +404.1 Actual exchange rate JPY/USD JPY/EUR 146.05 168.67 160.04 184.54 * Sensitivity per ¥1 FX change (sales / operating profit): USD ¥250m / ¥90m; EUR ¥60m / ¥40m.
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©2026 KOA CORPORATION. All Rights Reserved. Net Sales by Product 4 15.4 16.5 17.0 17.9 19.4 21.3 16.8 17.8 18.5 19.2 20.9 22.8 0.0 5.0 10.0 15.0 20.0 25.0 FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Resistors Safety devices Hybrid ICs Other YoY QoQ Other (3.8%) (13.7%) Hybrid ICs +21.5% +8.1% Safety devices +15.0% (2.3%) Resistors +29.5% +10.0% Resistors 94% Safety devices 1% Hybrid ICs 2% Other 3% FY03/27Q2 Net sales breakdown ‒ Resistor sales grew across all applications. Sales of high-performance thick-film products rose in China's automotive market. Sales of high-precision thin-film chip resistors rose to distributors and for industrial equipment. ‒ Sales of hybrid ICs increased, driven by demand for industrial equipment in Japan. ‒ Sales of other products declined, including end-of-life inductors. (Billions of ¥)
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©2026 KOA CORPORATION. All Rights Reserved. Net Sales by Region 5 6.4 7.0 7.6 7.7 8.4 10.0 4.4 4.5 4.8 4.7 5.2 5.52.7 3.0 2.9 3.0 3.3 3.4 3.4 3.3 3.2 3.9 3.9 3.9 16.8 17.8 18.5 19.2 20.9 22.8 0.0 5.0 10.0 15.0 20.0 25.0 FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Asia Japan North America Europe YoY QoQ Europe +17.0% (1.3%) North America +12.1% +0.5% Japan +21.8% +5.7% Asia +43.8% +19.1% Asia 44% Japan 24% North America 15% Europe 17% FY03/27Q2 Net sales breakdown (Billions of ¥) ‒ In Asia, sales to automotive customers and distributors increased. ‒ In Japan, sales increased for industrial equipment and automotive applications. ‒ In Europe, net sales decreased quarter on quarter due to yen appreciation.
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©2026 KOA CORPORATION. All Rights Reserved. Net Sales by Application 6 9.0 9.2 9.3 9.9 9.7 10.8 2.0 2.2 2.2 2.2 2.7 2.91.1 1.3 1.6 1.6 1.9 1.9 0.8 0.9 1.1 1.2 1.3 1.3 0.8 0.8 0.7 0.9 1.0 1.0 3.2 3.4 3.6 3.4 4.4 4.8 16.8 17.8 18.5 19.2 20.9 22.8 0.0 5.0 10.0 15.0 20.0 25.0 FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Automotive Industrial equipment Communication Power supply Consumer electronics Other YoY QoQ Other +42.7% +9.9% Consumer electronics +26.9% +2.5% Power supply +37.5% +1.9% Communication +44.4% +4.1% Industrial equipment +35.6% +8.1% Automotive +17.3% +11.3% Automotive 47% Industrial equipment 13% Communication 9% Power supply 6% Consumer electronics 4% Other 21% FY03/27Q2 Net sales breakdown ‒ The share of net sales from automotive applications increased by one percentage point, driven by growth in Asia and Japan. ‒ Sales in the other category increased, driven by sales to distributors in Asia and North America. ‒ Sales for industrial equipment increased in Japan and Asia. (Billions of ¥)
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©2026 KOA CORPORATION. All Rights Reserved. Operating Profit Analysis (Year on Year) 7 ‒ Operating profit increased by ¥2.4 billion year on year to ¥3.7 billion, supported by higher net sales and a weaker yen. ‒ Material costs increased by ¥2.8 billion due to higher raw material prices and increased production volume. ‒ Other factors included a ¥740 million benefit from improved capacity utilization and product mix, offset by ¥320 million in closing adjustments, including elimination of unrealized profit. 1.3 4.2 1.0 (2.8) (0.4) 0.4 3.7 FY03/26 H1 result 146 JPY/USD Contribution from higher sales Exchange rate fluctuations Raw material costs (precious metals) Higher fixed costs Other FY03/27 H1 result 160 JPY/USD 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 (Billions of ¥)
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©2026 KOA CORPORATION. All Rights Reserved. Order Intake, Order Backlog, Book-to-Bill Ratio 8 20.3 18.7 17.9 18.8 18.9 18.8 15.2 15.2 15.0 14.0 13.6 15.5 16.0 14.6 16.3 16.6 17.9 17.8 18.8 21.0 24.6 28.6 18.4 21.4 23.2 24.8 25.1 24.6 20.5 17.9 15.9 13.3 11.2 11.2 10.9 9.8 10.2 10.5 11.5 11.5 11.8 13.7 17.4 23.2 1.27 1.19 1.11 1.09 1.01 0.97 0.79 0.85 0.89 0.85 0.87 0.99 0.99 0.93 1.03 1.02 1.06 1.00 1.02 1.09 1.18 1.26 0.0 20.0 40.0 FY03/22 Q1 FY03/22 Q2 FY03/22 Q3 FY03/22 Q4 FY03/23 Q1 FY03/23 Q2 FY03/23 Q3 FY03/23 Q4 FY03/24 Q1 FY03/24 Q2 FY03/24 Q3 FY03/24 Q4 FY03/25 Q1 FY03/25 Q2 FY03/25 Q3 FY03/25 Q4 FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Order intake Order backlog Book-to-bill ratio(Billions of ¥) ‒ Orders received in the second quarter totaled ¥28.6 billion, with particularly strong increases in the automotive and AI-related equipment markets in China and industrial equipment in Japan. ‒ Some customers placed advance orders to secure supply.
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©2026 KOA CORPORATION. All Rights Reserved. 3.0 3.2 3.6 3.6 3.5 1.6 4.1% 5.0% 5.6% 5.0% 3.6% 0.0 2.0 4.0 6.0 FY03/23 FY03/24 FY03/25 FY03/26 FY03/27 Forecast R&D expenses R&D-to-sales ratio 11.9 19.1 24.2 6.0 4.1 1.2 0.0 5.0 10.0 15.0 20.0 25.0 30.0 FY03/23 FY03/24 FY03/25 FY03/26 FY03/27 Forecast Capital expenditure 9 (Billions of ¥) 4.1 4.9 5.9 7.1 7.2 3.6 0.0 2.0 4.0 6.0 8.0 FY03/23 FY03/24 FY03/25 FY03/26 FY03/27 Forecast Depreciation expenses(Billions of ¥) (Billions of ¥) Capital Expenditure, Depreciation Expenses, R&D Expenses ‒ Capital expenditures in the first half totaled ¥1.2 billion, with a full-year forecast of ¥4.1 billion. The Company approved investment outside its original plan in miniature thick-film chip resistors for the fiscal year ending March 31, 2028. ‒ Research and development expenses in the first half totaled ¥1.6 billion. Their ratio to net sales declined to 3.6%, reflecting higher net sales. * H1 result * * * *
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©2026 KOA CORPORATION. All Rights Reserved. Revision of Financial Forecast for FY03/27 10 Billions of yen FY03/26 New forecast for FY03/27 YoY Full -year result (%) H1 result (%) H2 forecast (%) Full-year forecast (%) (%) Net sales 72.3 100.0 43.6 100.0 47.9 100.0 91.5 100.0 +19.2 +26.6 Operating profit 3.7 5.0 3.7 8.6 4.6 9.5 8.3 9.1 +4.7 +127.9 Ordinary profit 5.2 7.2 4.0 9.1 4.6 9.6 8.6 9.4 +3.3 +63.9 Profit (loss) attributable to owners of parent 4.0 5.5 5.8 13.3 3.8 8.0 9.7 10.6 +5.7 +144.5 ROE 4.7% — — 10.5% Actual / assumed exchange rate JPY/USD JPY/EUR 151.06 175.55 160.04 184.54 159.00 183.00 159.52 183.77 For the fiscal year ending March 31, 2027 ‒ Orders for automotive, AI-related equipment and industrial equipment are expected to remain firm in the second half. ‒ The forecast assumes raw material price pressures will remain at the second-quarter level.
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©2026 KOA CORPORATION. All Rights Reserved. FY03/27 Revised Forecast: Operating Profit Analysis 11 (Billions of ¥) ‒ The impact of higher raw material prices includes the offsetting benefit of selling price adjustments. ‒ Fixed costs will increase mainly due to labor costs for higher production and the start-up of the new plant in Malaysia. 3.7 9.0 1.4 (5.5) (1.3) 1.0 8.3 FY03/26 result 151 JPY/USD Contribution from higher sales Exchange rate fluctuation Raw material costs (precious metals) Higher fixed costs Other FY03/27 forecast 160 JPY/USD 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0
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©2026 KOA CORPORATION. All Rights Reserved. Annual Trends in Net Sales and Operating Profit 12 75.1 64.8 64.1 72.3 43.6 91.5 80.0 10.2 3.3 1.2 3.7 3.7 8.3 7.4 13.6% 5.1% 1.8% 5.0% 8.6% 9.1% 9.3% 0.0 20.0 40.0 60.0 80.0 100.0 FY03/23 FY03/24 FY03/25 FY03/26 FY03/27 H1 result FY03/27 full-year forecast FY03/28 Target Net sales Operating profit Operating margin (Billions of ¥) 160 JPY/USD 160 JPY/USD 145 JPY/USD
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©2026 KOA CORPORATION. All Rights Reserved. Dividends 13 ■ Dividend policy We regard the return of profits to shareholders as one of our most important management priorities. From the perspective of comprehensive capital allocation, our basic policy is to pay dividends while emphasizing reinvestment in its businesses and the optimization of shareholders' equity. For the time being, the annual dividend will be set at no less than ¥30 per share and aims for a consolidated dividend payout ratio of around 30% as a reference. Q2-end Year-end Annual total FY03/26 result 15.00 17.00 32.00 Previous forecast (Actual) 31.50 31.50 63.00 Revised forecast (Actual) 31.50 46.50 78.00 Change － +15.00 +15.00 ■ Revision of dividend forecast The year-end dividend forecast has been revised upward by ¥15 per share, bringing the annual dividend forecast to ¥78 per share. (Yen)
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©2026 KOA CORPORATION. All Rights Reserved. Cash Flows 14 8.7 7.1 8.1 9.1 5.1 (12.9) (17.4) (23.9) (7.1) (1.3) 8.0 12.3 11.3 (0.5) (5.6) 25.4 29.2 24.8 27.4 25.8 (4.2) (10.3) (15.8) 2.0 3.8 (20.0) (16.0) (12.0) (8.0) (4.0) 0.0 4.0 8.0 12.0 (60.0) (40.0) (20.0) 0.0 20.0 40.0 FY03/23 FY03/24 FY03/25 FY03/26 FY03/27 H1 Operating CF Investing CF Financing CF Cash and cash equivalents FCF (Billions of ¥)(Billions of ¥)
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©2026 KOA CORPORATION. All Rights Reserved. Summary of Quarterly Results 15 FY03/26 Q2 FY03/27 Q1 FY03/27 Q2 YoY QoQ (Billions of ¥) (%) (Billions of ¥) (%) (Billions of ¥) (%) (Billions of ¥) (%) (Billions of ¥) (%) Net sales 17.8 100.0 20.9 100.0 22.8 100.0 +5.0 +27.9 +1.9 +9.0 Operating profit 0.8 4.5 0.9 4.1 2.9 12.7 +2.1 +258.6 +2.0 +239.2 Ordinary profit 1.1 6.1 1.3 6.3 2.7 11.7 +1.6 +145.3 +1.4 +102.9 Profit (loss) attributable to owners of parent 0.7 4.1 1.6 7.8 4.2 18.4 +3.5 +470.2 +2.6 +157.2 Actual exchange rate JPY/USD JPY/EUR 148.39 172.21 160.72 186.10 159.35 182.97
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©2026 KOA CORPORATION. All Rights Reserved. Quarterly Net Sales and Operating Profit 16 18.6 19.3 19.3 17.8 17.0 16.6 15.7 15.6 16.2 15.7 15.9 16.4 16.8 17.8 18.5 19.2 20.9 22.8 2.7 2.9 3.1 1.5 0.9 0.6 1.6 0.2 0.2 0.2 0.1 0.6 0.5 0.8 1.8 0.5 0.9 2.9 14.3% 15.2% 15.9% 8.7% 5.1% 3.5% 10.3% 1.6% 1.4% 1.6% 0.6% 3.8% 3.0% 4.5% 9.7% 2.8% 4.1% 12.7% 0.0 5.0 10.0 15.0 20.0 FY03/23 Q1 FY03/23 Q2 FY03/23 Q3 FY03/23 Q4 FY03/24 Q1 FY03/24 Q2 FY03/24 Q3 FY03/24 Q4 FY03/25 Q1 FY03/25 Q2 FY03/25 Q3 FY03/25 Q4 FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Net sales Operating profit Operating margin (Billions of ¥)
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©2026 KOA CORPORATION. All Rights Reserved. Quarterly Net Sales by Product, Region and Application 17 By product FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Resistors 15,428 16,450 17,018 17,945 19,364 21,308 Safety devices 304 321 328 323 377 369 Hybrid ICs 316 368 398 339 414 447 Other 798 650 711 591 725 626 Total 16,846 17,789 18,455 19,198 20,880 22,750 By region FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Asia 6,405 6,975 7,605 7,672 8,420 10,029 Japan 4,356 4,480 4,755 4,695 5,163 5,458 North America 2,672 3,004 2,903 2,951 3,349 3,367 Europe 3,413 3,330 3,193 3,880 3,948 3,895 Total 16,846 17,789 18,455 19,198 20,880 22,750 By application FY03/26 Q1 FY03/26 Q2 FY03/26 Q3 FY03/26 Q4 FY03/27 Q1 FY03/27 Q2 Automotive 9,004 9,181 9,306 9,930 9,681 10,771 Industrial equipment 1,972 2,173 2,164 2,207 2,724 2,946 Communication 1,051 1,341 1,607 1,635 1,860 1,936 Power supply 811 949 1,063 1,155 1,281 1,305 Consumer electronics 821 772 746 860 956 980 Other 3,187 3,373 3,569 3,411 4,378 4,812 Total 16,846 17,789 18,455 19,198 20,880 22,750 (Millions of ¥)