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MITSUI KINZOKU ( Mitsui Kinzoku Company , Limited TSE5706 ) FY2026 Q1 Results & FY2026 Forecast Aug 7 , 2026 Copyright © Mitsui Kinzoku Co. , Ltd. or its affiliates All Rights Reserved .
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. ・ FY2026 Q1 YoY: Sales and profits increased due to higher sales volume of MicroThin and AI server -related Electrolytic Copper Foil VSP in the Engineered Materials segment, the weak yen and high metal prices, as well as an improvement in inventory factors in the Metal segments resulting from these conditions. Net profit attributable to owners of parent improved significantly due to the absence of the extraordinary loss related to the sale of shares in an affiliated company recorded in the same period of the previous fiscal year. ・ As for the FY2026 forecast, continued strong sales volumes of major products in the Engineered Materials segment and the impact of declining prices for certain metals in the Metals segment are expected to result in higher sales and profits compared with the previous forecast. Results of FY2026 Q1 (Unit: Billion yen) 1 2026 2025 Difference 2026 2026 Difference Results Results （26-25） Forecast Forecast （Aug 7） （May 13） 201.6 169.0 32.6 850.0 830.0 20.0 19.3% 2.4% 21.0 11.4 9.6 94.0 91.0 3.0 84.1% 3.3% 23.5 10.0 13.5 100.0 93.0 7.0 134.3% 7.5% 16.8 -6.0 22.8 80.0 75.0 5.0 - 6.7% Q1 Results Forecast Net Sales Operating Income Ordinary Income Net income attributable to owners of parent
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. 652.0 646.7 712.3 758.5 850.0 201.6 23/3 24/3 25/3 26/3 27/3 26/6 *1 Including the JPY 1.5 per share 150th Anniversary commemorative dividend. *2 Excluding the JPY 1.5 per share 150th Anniversary commemorative dividend. *3 Adjusted for the 10-for-1 stock split *4 The interim dividend is expected to be JPY 140 per share before the stock split effective October 1, 2026. Dividend per share ¥14 ¥14 ¥18 ¥24.5 ¥28 <Interim Dividend> ( - ) (¥7) (¥9) (¥10) (¥14) DOE 3.3% 3.1% 3.0% 3.5% 3.5% 12.5 31.7 74.7 130.9 94.0 21.0 19.9 44.5 76.4 136.7 100.0 23.5 8.5 26.0 64.7 91.3 80.0 16.8 Sales and Earnings Operating Income Ordinary Income Net Income attributable to owners of parent Sales Forecast as of Aug 7 (Unit : Billion yen) *1, *3 *1, *3 *2 2 *3, *4 *3 *3 *3*3 *3 *3
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. For FY2026, operating income is expected to decrease by 4.0 billion yen in the first half compared to the previous forecast, and for the full year, it is expected to increase by 3.0 billion yen compared to the previous forecast. FY2026 Operating Income Forecast Forecast for FY2026 1st half 45.0 91.0 94.0 49.049.0 Forecast for FY2026 2nd half Forecast for FY2026 1st half Forecast for FY2026 2nd half Forecast for FY2026 On Aug 7 Forecast for FY2026 On May 13 42.0 3 （Unit： Billion yen） Operating Income Forecast for FY2026 (May 13th) Operating Income Forecast for FY2026 (Aug 7th) See page 18 for details See page 4 for details See page 5 for details Profit decrease by 4.0 billion Profit increase by 7.0 billion Profit increase by 3.0 billion
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. FY2026 1st half Operating Income Forecast 4 45.0 - 3.6 -1.6 + 2.0 Operating Income Forecast for FY2026 1st half on May 13th 49.0 Operating Income Forecast for FY2026 1st half on Aug 7th + 4.5 - 5.3 (Unit : Billion yen) Profit decrease by 4.0 billion Corporate & others Engineered Materials MetalsPGM price difference on Catalysts Inventory factors ■Main factor ・ Copper foil +3.8 ・ Catalysts +0.7 ■Main factor ・ Engineered Materials +2.1 ・ Metals -5.7 ■Main factor ・ Business Creation -0.9 ・ Consolidated adjustment etc. +3.0 ■Main factor ・ LME (Zinc and Lead) / Forex +1.2 ・ Energy cost (including cokes) +1.1 ・ By-products of Zinc and Lead smelting -1.0 ・ Zinc and Lead Smelting costs increase -1.0 ・ Copper smelting -5.9 ・ Precious metals recycling -0.8 ・ Mineral Resources Div. +1.7
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. PGM price difference on Catalysts Inventory factors FY2026 2nd half Operating Income Forecast 5 (Unit : Billion yen) 49.0- 1.9 0 + 6.4 + 2.5 Operating Income Forecast for FY2026 2nd half on May 13th 42.0 Operating Income Forecast for FY2026 2nd half on Aug 7th 0 Profit increase by 7.0 billionCorporate & others Engineered Materials Metals ■Main factor ・ Copper foil +5.9 ・ Catalysts +1.1 ・ Engineered Powders -0.8 ■Main factor ・ Engineered Materials +0.1 ・ Metals -0.1 ■Main factor ・ Business Creation +0.8 ・ Consolidated adjustment etc. +1.4 ■Main factor ・ LME (Zinc and Lead) / Forex +1.1 ・ Energy cost (including cokes) -0.3 ・ By-products of Zinc and Lead smelting -1.6 ・ Mineral Resources Div. -1.1
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. 6 Copper Foil Product Capacity Expansion 2025 2026 2027 2028 2030 Taiwan Plant 600 720 760 860 960 Malaysia Plant 120 120 240 340 440 Total 720 840 1,000 1,200 1,400 2025 2026 2027 2028 Taiwan Plant 600 720 760 860 Malaysia Plant 120 120 240 340 Total 720 840 1,000 1,200 2025 2026 2027 2028 2030 Japan Plant 2,500 2,500 2,600 2,800 TBD Malaysia Plant 2,400 2,400 2,600 3,200 TBD Total 4,900 4,900 5,200 6,000 8,000 2024 2027 2030 Japan Plant 2,500 2,600 2,800 Malaysia Plant 2,400 2,600 2,800 Total 4,900 5,200 5,600 2025 2026 2027 2028 2029 2030 Malaysia Plant 70 80 100 135 135 135 Japan Plant 5 5 35 60 85 85 Taiwan Plant - - - - 70 135 Total 75 85 135 195 290 355 Capacity expansion for core copper foil products—VSP , MicroThin , and FaradFlex®— is supporting steady progress toward the 2030 ordinary income target—JPY 150 billion on a consolidated basis, including JPY 130 billion from the Engineered Materials segment. ■Original Plan ■Latest Plan (Red boxes indicate additions.) FaradFlex® (FF) - News release issued on August 21, 2025 - Production capacity to be increased 1.6-fold by March 2026 ● Upside potential for the 2030 earnings target, depending on MicroThin and others. ● Considering new plants and M&A for growth beyond 2030 → further enhancement of corporate value Total investment: JPY 7.0 B Total investment: JPY 5.0 B Total investment: JPY 30.0 B MicroThin VSP FaradFlex® (FF) MicroThin VSP Unit: K -m2/month Unit: t/month Unit: t/month Unit: K -m2/month Unit: K -m2/month * * Establishment of a new plant.
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Statements of income (Unit : Billion yen) 7 2026 2025 Difference 2026 2025 Difference 2026 2025 Difference Results Results （26-25） Forecast Results （26-25） Forecast Results （26-25） 201.6 169.0 32.6 420.0 364.3 55.7 850.0 758.5 91.5 19.3% 15.3% 12.1% 159.5 138.6 20.9 - - - - - - 15.1% 42.1 30.4 11.7 - - - - - - 38.4% 21.1 19.0 2.1 - - - - - - 11.0% 21.0 11.4 9.6 45.0 39.8 5.2 94.0 130.9 -36.9 84.1% 13.2% -28.2% 2.4 -1.4 3.9 3.5 -0.6 4.1 6.0 5.8 0.2 23.5 10.0 13.5 48.5 39.1 9.4 100.0 136.7 -36.7 134.3% 23.9% -26.9% 0.5 -17.9 18.4 -0.3 -16.3 16.0 4.0 -19.3 23.3 24.0 -7.9 31.8 48.2 22.8 25.4 104.0 117.5 -13.5 - 111.0% -11.5% 7.1 -1.9 9.1 13.2 3.8 9.4 24.0 26.2 -2.2 16.8 -6.0 22.8 35.0 19.0 16.0 80.0 91.3 -11.3 - 83.7% -12.3% Extraordinary profit/losses- net Net Income before income taxes Income taxes & minority interests Net income attributable to owners of parent 1st half FYQ1 Results Net Sales Ordinary Income Cost of sales Gross Profit SG&A expenses Operating Income Non-operating income/expenses
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Segment Information by Business Unit (Unit : Billion yen) 8 2026 2025 Difference 2026 2025 Difference 2026 2025 Difference ■Sales Results Results （26-25） Forecast Results （26-25） Forecast Results （26-25） 100.6 71.3 29.3 208.0 150.5 57.5 411.0 328.4 82.6 41.1% 38.2% 25.1% 98.3 74.0 24.2 210.0 161.2 48.8 430.0 376.7 53.3 32.7% 30.3% 14.2% 38.2 53.7 -15.5 72.0 112.0 -40.0 138.0 187.7 -49.7 -28.9% -35.7% -26.5% Adjustment -35.4 -30.0 -5.4 -70.0 -59.5 -10.5 -129.0 -134.3 5.3 Consolidated 201.6 169.0 32.6 420.0 364.3 55.7 850.0 758.5 91.5 19.3% 15.3% 12.1% FYQ1 Results 1st half Engineered Materials Metals Corporate
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Segment Information by Business Unit (Unit : Billion yen) 9 2026 2025 Difference 2026 2025 Difference 2026 2025 Difference ■Operating income Results Results （26-25） Forecast Results （26-25） Forecast Results （26-25） 18.3 12.9 5.4 39.5 28.0 11.5 79.0 67.5 11.5 41.9% 40.9% 17.0% 5.3 2.9 2.3 11.0 17.7 -6.7 24.0 70.8 -46.8 80.0% -38.0% -66.1% -0.5 -1.1 0.6 -0.6 -1.5 0.9 0.1 0.4 -0.3 -73.8% -2.2 -1.1 -1.1 -4.9 -3.6 -1.3 -9.0 -7.5 -1.6 Adjustment 0.2 -2.2 2.4 0.0 -0.9 0.9 -0.1 -0.3 0.2 Consolidated 21.0 11.4 9.6 45.0 39.8 5.2 94.0 130.9 -36.9 84.1% 13.2% -28.2% ■Ordinary Income 18.2 10.5 7.7 39.0 26.5 12.5 78.0 66.5 11.5 73.8% 47.4% 17.2% 6.8 3.3 3.5 13.0 18.4 -5.4 26.5 75.1 -48.6 105.1% -29.5% -64.7% 0.6 -0.5 1.1 1.0 -0.8 1.8 2.3 3.1 -0.8 -26.8% -2.1 -1.1 -1.1 -4.9 -3.8 -1.2 -7.5 -6.8 -0.6 Adjustment 0.0 -2.2 2.2 0.4 -1.2 1.7 0.7 -1.2 1.9 Consolidated 23.5 10.0 13.5 48.5 39.1 9.4 100.0 136.7 -36.7 134.3% 23.9% -26.9% Corporate Business Creation Engineered Materials Metals Engineered Materials Metals Corporate Business Creation Q1 Results 1st half FY
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Variance analysis of operating income (Unit : Billion yen) 10 26Q1 25Q1 Diff. Volume LME/Forex Inventory Factor/ PGM price difference Margin/ Cost Total Engineered materials 18.3 12.9 5.4 2.9 0.3 0.9 1.3 5.4 Metals 5.3 2.9 2.3 0.3 2.2 5.2 -5.4 2.3 Corporate -0.5 -1.1 0.6 0.2 0.0 - 0.4 0.6 Business Creation -2.2 -1.1 -1.1 - - - -1.1 -1.1 Adjustment 0.2 -2.2 2.4 - 1.2 - 1.1 2.4 Total 21.0 11.4 9.6 3.4 3.8 6.1 -3.6 9.6 Operating Income Details
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Non-operating income/expenses and Extraordinary income/losses (Unit : Billion yen) 11 2026 2025 Difference 2026 2025 Difference 2026 2025 Difference Results Results （26-25） Forecast Results （26-25） Forecast Results （26-25） Interest income - net -0.3 -0.5 0.1 -0.8 -0.9 0.1 -1.8 -1.4 -0.4 Dividend income - net 0.3 0.5 -0.2 0.3 0.5 -0.2 0.3 0.5 -0.2 Equity in gains/losses 2.8 0.8 2.1 4.7 1.4 3.3 6.6 7.4 -0.7 Forex Exchange gain or loss -0.4 -2.3 1.9 -0.4 -1.8 1.5 -0.4 -1.4 1.1 Others 0.0 0.0 0.0 -0.3 0.2 -0.5 1.2 0.8 0.4 Non-operating income/expenses - net 2.4 -1.4 3.9 3.5 -0.6 4.1 6.0 5.8 0.2 Loss on sale & disposal of Fixed Asset -0.3 -0.3 0.0 -0.8 -0.8 0.0 -1.3 -2.8 1.5 Impairment losses 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -0.5 0.5 PL on sale of Investment Securities 1.0 0.0 1.0 1.0 0.2 0.8 1.0 0.3 0.8 PL on sale of shares of subsidiaries and associates 0.0 2.1 -2.1 0.0 2.1 -2.1 0.0 -16.9 16.9 Provision and reversal of allowance for doubtful accounts -0.1 -0.1 0.0 -0.1 1.2 -1.3 -0.1 1.2 -1.3 Provision for other reserves 0.0 -19.7 19.7 0.0 -18.8 18.8 0.0 0.0 0.0 Subsidy Income 0.0 0.0 0.0 0.0 0.0 0.0 5.5 0.1 5.4 Others -0.2 0.0 -0.3 -0.5 -0.2 -0.3 -1.1 -0.6 -0.5 Extraordinary income/losses - net 0.5 -17.9 18.4 -0.3 -16.3 16.0 4.0 -19.3 23.3 1st half FYQ1 Results
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Trends of products ※ Index : The sales volume in 2024 Q1 scaled at 100 ( except Copper Foil, MicroThin and Zinc ). 12 Q1 Q2 Q3 Q4 Year Q1 Q2 Q3 Q4 Year Q1 Q2 Forecast 1st Half Forecast 2nd Half Forecast Year Forecast 1st Half Forecast 2nd Half Forecast Year Forecast Copper foil Volume of Sales t / Month 1,680 1,650 1,680 1,600 1,650 1,750 1,980 1,970 1,700 1,850 1,750 1,750 1,750 1,740 1,750 1,840 1,790 1,810 VSP™ Volume of Sales t / Month 240 390 420 430 370 510 560 550 570 550 660 720 690 730 710 720 840 780 MicroThin™ Total (a+b) Volume of Sales k-m2/Month 2,480 2,650 2,220 2,060 2,350 3,120 3,480 3,430 3,610 3,410 4,070 4,510 4,290 4,230 4,260 3,970 3,700 3,840 MicroThin™ for HDI (a) Volume of Sales k-m2/Month 600 530 470 430 510 530 650 690 470 590 550 570 560 560 560 560 560 560 MicroThin™ for PKG (b) Volume of Sales k-m2/Month 1,880 2,120 1,750 1,630 1,840 2,590 2,830 2,740 3,140 2,820 3,520 3,940 3,730 3,670 3,700 3,410 3,140 3,280 Catalysts for motorcycle Volume of Sales Index 100 100 94 92 97 97 103 101 103 101 102 107 104 99 102 102 98 100 India Volume of Sales Index 100 101 87 83 93 87 98 97 101 96 98 104 101 95 98 100 93 97 Indonesia Volume of Sales Index 100 123 110 117 112 103 123 110 108 111 99 129 114 114 114 110 110 110 Others Volume of Sales Index 100 89 102 101 98 115 104 105 104 107 110 104 107 101 104 103 103 103 Catalysts for automobile Volume of Sales Index 100 98 100 95 98 94 95 96 95 95 88 92 90 99 94 94 95 94 Protective Coating Materials for Semiconductor Production Equipment Volume of Sales Index 100 101 126 130 114 131 125 124 153 133 117 140 129 89 109 140 139 140 Zinc Volume of Production k-t 56 47 56 58 216 53 52 47 42 194 45 58 103 115 218 108 118 226 2024 2025 2026 Forecast (May 13)2026 Forecast (Aug 7)
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Inventory Factors and PGM price difference on Catalysts (Unit : Billion yen) 13 ■Inventory Factors Q1 Q2 1st Half Q3 Q4 2nd Half Year Q1 Q2 Forecast 1st Half Forecast 2nd Half Forecast Year Forecast 1st Half Forecast 2nd Half Forecast Year Forecast Engineered materials 0.2 0.1 0.3 0.2 1.4 1.6 1.9 3.0 0.6 3.6 0.1 3.7 1.5 - 1.5 Metals -2.3 5.0 2.7 8.2 8.7 16.9 19.6 2.9 -1.1 1.8 0.1 1.9 7.5 0.2 7.7 Corporate -0.1 0.2 0.1 0.6 1.2 1.8 1.9 0.9 0.5 1.4 0.4 1.8 -0.3 - -0.3 Consolidated -2.2 5.3 3.1 9.0 11.3 20.3 23.4 6.8 - 6.8 0.6 7.4 8.7 0.2 8.9 ■PGM price difference on Catalysts Engineered materials 0.6 1.4 2.0 0.8 0.2 1.0 3.0 -1.3 0.7 -0.6 - -0.6 1.0 - 1.0 ■Inventory Factors + PGM price difference on Catalysts Engineered materials 0.8 1.5 2.3 1.0 1.6 2.6 4.9 1.7 1.3 3.0 0.1 3.1 2.5 - 2.5 Metals -2.3 5.0 2.7 8.2 8.7 16.9 19.6 2.9 -1.1 1.8 0.1 1.9 7.5 0.2 7.7 Corporate -0.1 0.2 0.1 0.6 1.2 1.8 1.9 0.9 0.5 1.4 0.4 1.8 -0.3 - -0.3 Consolidated -1.6 6.7 5.1 9.8 11.5 21.3 26.4 5.5 0.7 6.2 0.6 6.8 9.7 0.2 9.9 2025 2026 Forecast (Aug 7) 2026 Forecast (May 13)
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Difference Analysis of Ordinary income Performance by Segment – Engineered Materials ※Ordinary income : Ordinary income excluding inventory factors and PGM price difference on Catalysts. (Unit : Billion yen) 14 *1 ［FY2025 1st Half → FY2026 1st Half Forecast + 12.5］ Copper foil +11.9 (MicroThin and VSP volume of sales increases, others) Catalysts -0.7 (PGM price difference, others) PVD Materials +2.5 (Inventory factors, others) Headquarters -2.7 (Business Promotion cost, others) ［FY2025→FY2026 Forecast + 11.5］ Copper foil +15.1 (MicroThin and VSP volume of sales increases, others) Catalysts -1.2 (PGM price difference, others) PVD Materials +1.4 (Inventory factors, others) Headquarters -3.6 (Business Promotion cost, others) *1 In October 2025, the HRDP was transferred from the Business Creation Sector to Engineered Materials Sector. 26/Q1 25/Q1 Diff. 26/1H 25/1H Diff. FY2026 FY2025 Diff. Results Results （26-25） Forecast Results （26-25） Forecast Results （26-25） ■Sales 100.6 71.3 29.3 208.0 150.5 57.5 411.0 328.4 82.6 ■Operating income 18.3 12.9 5.4 39.5 28.0 11.5 79.0 67.5 11.5 ■Ordinary income 18.2 10.5 7.7 39.0 26.5 12.5 78.0 66.5 11.5 ※Ordinary income 16.5 9.7 6.8 36.0 24.2 11.8 74.9 61.6 13.3
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Difference Analysis of Ordinary income Performance by Segment – Metals ※Ordinary income : Ordinary income excluding inventory factors. (Unit : Billion yen) 15 *Detail of Others FY2025 1H→ FY2026 1H Forecast Operating variance in zinc smelting operations -0.5, By-products of Zinc and Lead smelting +2.0, Lead raw material mix variance -4.6, Zinc and Lead Smelting costs increase in Zinc and Lead Div. (including large scale maintenance -2.0) -5.5, Operating variance in copper smelting operations -4.8, Mineral Resource Div. +2.9 FY2025→ FY2026 Forecast Operating variance in zinc smelting operations +4.0, By-products of Zinc and Lead smelting -0.5, Lead raw material mix variance -9.2, Zinc and Lead Smelting costs increase in Zinc and Lead Div. (including large scale maintenance -2.0) -7.1, Operating variance in copper smelting operations -13.2, Costs increase in Copper Smelting (including large scale maintenance -2.6) -3.2, Precious metals recycling -2.4 26/Q1 25/Q1 Diff. 26/1H 25/1H Diff. FY2026 FY2025 Diff. Results Results （26-25） Forecast Results （26-25） Forecast Results （26-25） ■Sales 98.3 74.0 24.2 210.0 161.2 48.8 430.0 376.7 53.3 ■Operating income 5.3 2.9 2.3 11.0 17.7 -6.7 24.0 70.8 -46.8 ■Ordinary income 6.8 3.3 3.5 13.0 18.4 -5.4 26.5 75.1 -48.6 ※Ordinary income 3.9 5.6 -1.7 11.2 15.7 -4.5 24.6 55.5 -30.9 Sensitivity to ordinary income (for FY2026） Full open basis Zinc ± 100$/t 1.5 1.0 Lead ± 100$/t 0.2 0.2 US$ (yen/$) ± 1yen/$ 0.7 0.5 Zinc TC FY2026 85 $/t FY2025 80 $/t Including forward contract 3.9 5.0 0.0 0.1 -0.9 -17.7 2.4 -0.4 -1.0 -3.1 (-0.4) (-0.8) -9.8 -32.5 -5.4 -48.6 LME (Zinc and Lead) / Forex T/C (Zinc) Inventory Factors FY2025 1H→ FY2026 1H Forecast FY2025→ FY2026 Forecast Others * Total Equity profit/loss Energy cost (Cokes, included in the number avobe)
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Appendix
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Metal Prices and FOREX 17 Q1 Q2 1st Half Q3 Q4 2nd Half Year Q1 Q2 Fore cast 1st Half Fore cast 2nd Half Fore cast Year Fore cast 1st Half Fore cast 2nd Half Fore cast Year Fore cast Zinc ($ / t) 2,641 2,824 2,733 3,165 3,243 3,204 2,968 3,463 3,400 3,432 3,400 3,416 3,200 3,200 3,200 Zinc (Actual) ($ / t) 2,693 2,851 2,772 3,140 3,207 3,173 2,971 3,353 3,308 3,331 3,308 3,319 3,166 3,167 3,167 Lead ($ / t) 1,947 1,965 1,956 1,971 1,931 1,951 1,953 1,955 1,900 1,927 1,900 1,914 1,900 1,900 1,900 Copper (￠ / lb) 432 444 438 504 583 543 491 604 612 608 612 610 590 590 590 Indium ($ / Kg) 376 355 366 367 593 480 423 698 800 749 800 774 700 700 700 Palladium ($ / oz) 990 1,171 1,081 1,469 1,715 1,592 1,336 1,413 1,300 1,356 1,300 1,328 1,600 1,600 1,600 Rhodium ($ / oz) 5,453 6,770 6,112 7,912 10,790 9,351 7,731 9,282 8,000 8,641 8,000 8,321 10,000 10,000 10,000 Yen/US$ (yen / $) 144.6 147.5 146.0 154.2 156.9 155.5 150.8 159.5 160.0 159.7 160.0 159.9 155.0 155.0 155.0 Yen/US$ (Actual) (yen / $) 144.9 147.3 146.1 152.6 154.8 153.7 149.7 157.6 158.0 157.8 158.2 158.0 153.9 153.9 153.9 2025 2026 Forecast (Aug 7) 2026 Forecast (May 13)
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. FY2026 Operating Income Forecast 18 Operating Income Forecast for FY2026 on May 13th Operating Income Forecast for FY2026 on Aug 7th 94.0- 7.2 - 3.6 + 10.9 + 4.591.0 - 1.6 Profit increase by 3.0 billion Corporate & othersEngineered Materials Metals PGM price difference on Catalysts Inventory factors (Unit : Billion yen) ■Main factor ・ Copper foil +9.7 ・ Catalysts +1.8 ・ Engineered Powders -1.1 ■Main factor ・ Engineered Materials +2.2 ・ Metals -5.8 ■Main factor ・ Business Creation -0.1 ・ Consolidated adjustment etc. +4.4 ■Main factor ・ LME (Zinc and Lead) /Forex +2.3 ・ Energy cost (including cokes) +0.8 ・ By-products of Zinc and Lead smelting -2.5 ・ Zinc and Lead Smelting costs increase -0.8 ・ Copper smelting -6.0 ・ Precious metals recycling -1.0 ・ Mineral Resources Div. +0.6
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. 10.2 13.8 22.4 7.8 6.0 29.1 6.5 13.0 14.8 -1.0 1.5 0.9 -6.6 -6.3 -6.3 2.7 4.5 -3.2 Adjustment Business Creation Corporate Mobility Metals Engineered Materials Total 37.4 62.6 75.9 65.0 29.2 51.2 22.1 29.3 0.7 0.4 0.1 -0.1-6.3 -7.5 -9.0 -9.0-3.2 -0.3 -0.1 -4.4 Adjustment Business Creation Corporate Metals Engineered Materials Total 89.0 2022 results 19.6 32.5 2023 results 57.7 2024 results 106.4 57.7 2024 results 2025 results Financial Performance (Operating income) Trends in Financial Performance (excludes inventory factor and PGM price difference on Catalysts from Operating income) (Unit : Billion yen) Old Organization Current Organization 80.8 2026 Forecasts (May 13) 19 2026 Forecasts (Aug 7)
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. 11.0 14.8 22.1 12.8 15.7 31.9 6.3 14.1 13.4 0.4 3.0 1.9 -6.6 -6.5 -6.4 2.8 4.0 -4.5 Adjustment Business Creation Corporate Mobility Metals Engineered Materials Total 35.9 61.6 74.9 64.5 31.9 55.5 24.6 29.8 1.4 1.2 0.5 1.1 -6.4 -6.8 -7.5 -7.5 -4.5 -1.2 0.7 -4.8 Adjustment Business Creation Corporate Metals Engineered Materials Total 93.2 2022 results 2023 results 2024 results 110.3 58.4 2024 results 2025 results Trends in Financial Performance (excludes inventory factor and PGM price difference on Catalysts from Ordinary income) (Unit : Billion yen) Old Organization Current Organization 83.1 2026 Forecasts (May 13) 20 2026 Forecasts (Aug 7) Financial Performance (Ordinary income) 26.7 45.1 58.4
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Sales and Incomes (Unit : Billion yen) 21 Q1 Diff. Q1 Diff. ■Sales YonY QonQ Engineered Materials 71.3 79.2 83.1 94.8 328.4 100.6 107.4 208.0 203.0 411.0 29.3 5.7 Metals 74.0 87.2 93.8 121.7 376.7 98.3 111.7 210.0 220.0 430.0 24.2 -23.4 Corporate 53.7 58.3 33.9 41.8 187.7 38.2 33.8 72.0 66.0 138.0 -15.5 -3.6 Adjustment -30.0 -29.5 -32.9 -41.9 -134.3 -35.4 -34.6 -70.0 -59.0 -129.0 -5.4 6.5 Consolidated 169.0 195.3 177.9 216.3 758.5 201.6 218.4 420.0 430.0 850.0 32.6 -14.7 ■Operating income Engineered Materials 12.9 15.2 17.4 22.0 67.5 18.3 21.2 39.5 39.5 79.0 5.4 -3.8 Metals 2.9 14.8 18.1 34.9 70.8 5.3 5.7 11.0 13.0 24.0 2.3 -29.7 Corporate -1.1 -0.4 0.6 1.3 0.4 -0.5 -0.1 -0.6 0.7 0.1 0.6 -1.8 Business Creation -1.1 -2.6 -1.4 -2.4 -7.5 -2.2 -2.8 -4.9 -4.1 -9.0 -1.1 0.3 Adjustment -2.2 1.3 -2.8 3.4 -0.3 0.2 -0.1 0.0 -0.1 -0.1 2.4 -3.2 Consolidated 11.4 28.3 32.0 59.2 130.9 21.0 24.0 45.0 49.0 94.0 9.6 -38.2 ■Ordinary income Engineered Materials 10.5 16.0 18.4 21.7 66.5 18.2 20.8 39.0 39.0 78.0 7.7 -3.4 Metals 3.3 15.1 20.2 36.5 75.1 6.8 6.2 13.0 13.5 26.5 3.5 -29.6 Corporate -0.5 -0.2 1.2 2.7 3.1 0.6 0.4 1.0 1.3 2.3 1.1 -2.1 Business Creation -1.1 -2.7 -1.4 -1.7 -6.8 -2.1 -2.8 -4.9 -2.6 -7.5 -1.1 -0.5 Adjustment -2.2 1.0 -3.0 3.0 -1.2 0.0 0.4 0.4 0.3 0.7 2.2 -3.1 Consolidated 10.0 29.1 35.4 62.2 136.7 23.5 25.0 48.5 51.5 100.0 13.5 -38.7 ■Net income attributable to owners of parent -6.0 25.0 30.0 42.2 91.3 16.8 18.2 35.0 45.0 80.0 22.8 -25.4 '26/1H Forecast (Aug 7) '26/2H Forecast (Aug 7) FY2026 Forecast (Aug 7) '25/Q2 '25/Q3 '25/Q4 '26/Q1FY2025 '26/Q2 Forecast'25/Q1
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Operating incomes and ordinary incomes excluding inventory factors and PGM price difference on Catalysts (Unit : Billion yen) 22 Q1 Diff. Q1 Diff. ■Operating income YonY QonQ Engineered Materials 12.1 13.7 16.4 20.4 62.6 16.6 19.9 36.5 39.4 75.9 4.5 -3.9 Metals 5.2 9.8 9.9 26.2 51.2 2.4 6.8 9.2 12.9 22.1 -2.9 -23.9 Corporate -1.1 -0.4 0.6 1.3 0.4 -0.5 -0.1 -0.6 0.7 0.1 0.6 -1.8 Business Creation -1.1 -2.6 -1.4 -2.4 -7.5 -2.2 -2.8 -4.9 -4.1 -9.0 -1.1 0.3 Adjustment -2.2 1.3 -2.8 3.4 -0.3 0.2 -0.1 0.0 -0.1 -0.1 2.4 -3.2 Consolidated 12.9 21.8 22.8 48.9 106.4 16.4 23.8 40.2 48.8 89.0 3.5 -32.5 ■Ordinary income Engineered Materials 9.7 14.5 17.4 20.1 61.6 16.5 19.5 36.0 38.9 74.9 6.8 -3.5 Metals 5.6 10.1 12.0 27.8 55.5 3.9 7.3 11.2 13.4 24.6 -1.7 -23.8 Corporate -0.4 -0.4 0.6 1.5 1.2 -0.3 -0.1 -0.4 0.9 0.5 0.1 -1.8 Business Creation -1.1 -2.7 -1.4 -1.7 -6.8 -2.1 -2.8 -4.9 -2.6 -7.5 -1.1 -0.5 Adjustment -2.2 1.0 -3.0 3.0 -1.2 0.0 0.4 0.4 0.3 0.7 2.2 -3.1 Consolidated 11.6 22.4 25.6 50.7 110.3 18.0 24.3 42.3 50.9 93.2 6.4 -32.7 '26/1H Forecast (Aug 7) '26/2H Forecast (Aug 7) FY2026 Forecast (Aug 7) FY2025 '26/Q2 Forecast'26/Q1'25/Q4'25/Q3'25/Q1 '25/Q2
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Sales (Unit : Billion yen) 23 Q1 Q2 Q3 Q4 FY2025 Q1 Engineered Copper Foil 29.9 34.1 34.6 36.4 135.0 41.0 Materials Catalysts 26.2 28.7 31.5 34.3 120.6 36.1 Engineered Powders 7.1 8.5 9.8 15.5 40.9 14.7 Others 8.1 7.9 7.3 8.7 32.0 8.8 71.3 79.2 83.1 94.8 328.4 100.6 Metals Lead & Zinc 48.0 60.1 59.2 79.7 247.1 67.0 Copper & Precious Metals 21.0 22.7 26.3 35.4 105.4 24.9 Others 5.0 4.3 8.2 6.6 24.2 6.3 74.0 87.2 93.8 121.7 376.7 98.3 Corporate Door Latches for automobiles 24.6 26.7 0.0 0.0 51.2 0.0 Business Reconstruction Office products 23.3 24.7 23.3 29.5 100.8 29.2 Engineering business, Others 5.9 7.0 10.6 12.3 35.7 9.0 53.7 58.3 33.9 41.8 187.7 38.2 Adjustment -30.0 -29.5 -32.9 -41.9 -134.3 -35.4 Consolidated 169.0 195.3 177.9 216.3 758.5 201.6 20262025
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. List of transient factors and Non-operating income/expenses Forex Exchange gain or loss FY2026 Forecast Transient factors (Reference) FY2025 Transient factors (Reference) FY2025 Non-operating income/expenses Forex Exchange gain or loss (Unit : Billion yen) 24 FY2026 Non-operating income/expenses Forex Exchange gain or loss Q2 FY2026 1st half Q3 Q4 FY2026 2nd half FY2026 FY2026 1st half FY2026 2nd half FY2026 Forecast Forecast Forecast Forecast Forecast Forecast(Aug 7) Forecast(May 13) Forecast(May 13) Forecast(May 13) Metals Large scale maintenance for Zinc Smelting -2.0 0.0 -2.0 0.0 0.0 0.0 -2.0 -2.0 0.0 -2.0 Large scale maintenance for Copper Smelting 0.0 0.0 0.0 -2.6 0.0 -2.6 -2.6 0.0 -2.6 -2.6 Subtotal -2.0 0.0 -2.0 -2.6 0.0 -2.6 -4.6 -2.0 -2.6 -4.6 Total -2.0 0.0 -2.0 -2.6 0.0 -2.6 -4.6 -2.0 -2.6 -4.6 Metals Lead raw material mix variance 0.0 3.9 3.9 0.0 0.0 0.0 3.9 Subtotal 0.0 3.9 3.9 0.0 0.0 0.0 3.9 Corporate Loss on sale of shares of ACT Corporation -19.7 0.9 -18.8 -0.2 0.0 -0.2 -19.0 Subtotal -19.7 0.9 -18.8 -0.2 0.0 -0.2 -19.0 Adjustment Actuarial gains in retirement benefit obligations of the head office 0.0 0.0 0.0 0.0 4.7 4.7 4.7 Total -19.7 4.8 -14.9 -0.2 4.7 4.5 -10.4 Q2 FY2026 1st half Q3 Q4 FY2026 2nd half FY2026 FY2026 1st half FY2026 2nd half FY2026 Forecast Forecast Forecast Forecast Forecast Forecast(Aug 7) Forecast(May 13) Forecast(May 13) Forecast(May 13) Copper Foil 0.5 0.0 0.5 0.0 0.0 0.0 0.5 0.0 0.0 0.0 Catalysts -0.5 0.0 -0.5 0.0 0.0 0.0 -0.5 0.0 0.0 0.0 Others -0.4 0.0 -0.4 0.0 0.0 0.0 -0.4 0.0 0.0 0.0 Total -0.4 0.0 -0.4 0.0 0.0 0.0 -0.4 0.0 0.0 0.0 Copper Foil -1.7 0.6 -1.1 0.3 0.1 0.4 -0.7 Catalysts -0.6 -0.1 -0.7 0.4 -0.6 -0.2 -0.9 Others 0.0 0.0 0.0 -0.1 0.3 0.2 0.2 Total -2.3 0.5 -1.8 0.6 -0.2 0.4 -1.4 FY2025 Engineered Materials Q1 Q2 FY2025 1st half Q3 Q4 FY2025 2nd half FY2025 1st half Q4 FY2025 2nd half FY2025Q3 Engineered Materials Q1 Q1 Q1 Q2
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. - Purpose: To create more accessible investment environment and broaden our investor base by lowering the investment amount per share unit. - Overview: Note：Number of shares to be increased Total number of shares issued Total number of shares authorized for issuance Before stock split 57,420,389 shares 190,000,000 shares After stock split 574,203,890 shares 1,900,000,000 shares 25 Stock Split Method of the Stock Split ：Each share of common stock will be split into 10 shares Record Date ：September 30, 2026 (Wednesday) Effective Date ：October 1, 2026 (Thursday) Dividends per Share Record Date End of 2nd Quarter Year-end Annual Forecast (announced on May 13) 140 Yen 140 Yen 280 Yen Forecast （converted to pre-stock split basis） 140 Yen （140 Yen） 14 Yen （140 Yen） ─ （280 Yen） (Reference) Results for previous fiscal year (ended March 31, 2026) 100 Yen 145 Yen 245 Yen - Revisions to the dividend forecasts (FY2026): (*) Payment of the second quarter-end dividend will be made based on the pre-split number of shares. (*) *Please also refer to the announcement released on August 7, 2026, “Notice Regarding Stock Split, Partial Amendment to the Articles of Incorporation in Conjunction with the Stock Split, and Revision of Dividend Forecast”
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Business Creation Business Creation Sector Engeneered Materials Sector Copper Foil Engineered Powders (Battery Materials, Engineered Powders) Ceramics PVD Materials Nippon Yttrium Metals Sector Lead & Zinc (Chemicals) Copper & Precious Metals Mineral Resources Mobility Sector Catalysts Mitsui Kinzoku ACT Mitsui Kinzoku Die-Casting Technology Kyusyu Precision Equipment and Components Business Reconstruction Office Mitsui Kinzoku Perlite, Powdertech Mesalite Other Affiliated Companies MESCO, others Mobility Engeneered Materials Metals Corporate Old Organization Current Organization Changes of Company Organization (After April 1st, 2025) Business Creation Business Creation Sector Engeneered Materials Sector Copper Foil Catalysts Engineered Powders (Battery Materials, Engineered Powders) Rare Material Ceramics PVD Materials Metals Sector Lead (Chemicals), Mesalite Zinc (Chemicals) Copper & Precious Metals Mineral Resources Business Reconstruction Office Mitsui Kinzoku ACT Mitsui Kinzoku Die-Casting Technology Kyusyu Precision Equipment and Components Mitsui Kinzoku Perlite, Powdertech Other Affiliated Companies MESCO, others Corporate Engeneered Materials Metals (Rare Metal Business) * * The transfer of all shares of MITSUI KINZOKU ACT was completed on Nov 4, 2025. 26
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Copyright © Mitsui Kinzoku Co., Ltd. or its affiliates All Rights Reserved. Caution Concerning Forward-looking Statements Statements contained in these materials regarding forecasts of future events are qualified by various risks, both existing and unknown, and uncertainties, which may have a material impact on the actual business conditions and operational activities. Consequently, please be aware that actual performance may differ substantially from forecasts and business plans indicated herein because of various unforeseeable factors. MITSUI KINZOKU COMPANY , LIMITED cannot guarantee the validity of the targets, assumptions, expectations, predictions, plans, assessments and other information contained in this material, and the Company also cannot guarantee that its actual business performance will be consistent with the forecasts presented within. Regarding latent risks which might impact forecast results and other uncertainties, some items are included in the “Business and Other Risks” section of our financial statements or our website. However, please recognize that these are just a summary rather than a comprehensive list of all possible items relating to latent risks and uncertainties. This material was compiled with the aim of furthering the understanding of our shareholders and other investors with regard to the Company’s management policy and other details. This material is not for the purpose of soliciting investment through the purchase or sale of stocks. Accordingly, you are advised not to make your investment decision solely on the basis of the material presented herein. 27