3401 Q1 2027 Earnings Report

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Summary of Consolidated Financial Results for the Three Months Ended June 30, 2026 [IFRS] August 4, 2026 Company name: TEIJIN LIMITED (Stock code 3401) https://www.teijin.com Stock exchange listing: Tokyo (Prime Market) Representative: Akimoto Uchikawa President and CEO Contact person: Tetsuji Mikami General Manager, Corporate Communication Department Telephone number: +81-(0)3-3506-4395 Scheduled date for dividends payment: － Availability of supplementary information for the quarterly financial results: Yes Organization of briefing on the quarterly financial results: Yes (for analysts and institutional investors) (Amounts rounded to the nearest million yen) (1) Consolidated financial results (Percentages are year-on-year changes) Revenue Adjusted operating income Operating income Profit before tax Million yen % Million yen % Million yen % Million yen % For the three months ended June 30, 2026 221,943 (8.7) 12,307 56.8 59,959 － 59,831 － For the three months ended June 30, 2025 243,117 (4.8) 7,847 (24.5) 2,295 (71.5) 62 (99.3) Profit for the period Profit attributable to owners of parent Comprehensive income Million yen % Million yen % Million yen % For the three months ended June 30, 2026 45,035 － 45,106 － 55,750 925.2 For the three months ended June 30, 2025 (570) － (740) － 5,438 (73.3) Basic earnings per share Diluted earnings per share Yen Yen For the three months ended June 30, 2026 233.81 233.73 For the three months ended June 30, 2025 (3.84) (3.84) 1. Highlight of the First Quarter of FY2026 (April 1, 2026 through June 30, 2026) Note: Adjusted operating income is calculated by adding share of profit (loss) of investments accounted for using the equity method to operating income and excluding gains and losses due to nonrecurring factors, which include nonrecurring gains and losses such as financial gains and losses and impairment losses in share of profit (loss) of investments accounted for using the equity method.

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Total assets Total equity Equity attributable to owners of parent Ratio of equity attributable to owners of parent Million yen Million yen Million yen % As of June 30, 2026 950,183 419,860 415,141 43.7 As of March 31, 2026 920,115 368,631 364,461 39.6 Dividends per share Period 1Q 2Q 3Q 4Q Annual Yen Yen Yen Yen Yen FY2025 － 25.00 － 25.00 50.00 FY2026 － FY2026 (outlook) 25.00 － 25.00 50.00 (Percentages are year-on-year changes) Revenue Adjusted operating income Operating income Profit attributable to owners of parent Basic earnings per share Million yen % Million yen % Million yen % Million yen % Yen FY2026 annual 900,000 3.1 30,000 16.4 70,000 － 45,000 － 233.26 (2) Consolidated financial position 2. Dividends Note: Revision of outlook for dividends in the first quarter: None 3. Forecast for Operating Results in the Fiscal Year Ending March 31, 2027 (FY 2026) Note: Revision of outlook for FY2026 consolidated operating results in the first quarter: Yes For the forecast for operating results, please refer to the “Results of FY2026 1Q & Outlook for FY2026” released today.

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a. Changes in accounting policies required by IFRS None b. Changes in accounting policies due to other reasons: None c. Changes in accounting estimates: None a. Number of shares issued and outstanding (including treasury shares) As of June 30, 2026: 197,953,707 shares As of March 31, 2026: 197,953,707 shares b. Number of treasury shares As of June 30, 2026: 5,038,843 shares As of March 31, 2026: 5,037,805 shares c. Average number of issued and outstanding shares during the period The three months ended June 30, 2026: 192,915,439 shares The three months ended June 30, 2025: 192,726,662 shares ■ Notes (1) Significant changes in the scope of consolidation for the three months ended June 30, 2026: None (2) Changes in accounting policies or changes in accounting estimates (3) Shares issued (common shares) ■ Review by certified public accountants or an audit firm for the attached quarterly consolidated financial statements: None ■ Appropriate use of forecast and other information and other matters (Caution regarding all forecasts in this document) All forecasts in this document are based on management’s assumptions in light of information currently available and involve certain risks and uncertainties. Moreover, the Company does not guarantee the achievement of these forecasts and actual results could differ materially from these forecasts. (Quarterly supplementary financial information and contents of quarterly business results presentation) (1) Quarterly supplementary financial information is disclosed on TDnet (Timely Disclosure network) and on our company’s website on the same day. (2) Quarterly business results presentation will be disclosed on our company’s website.

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Supplementary Information Table of Contents 1. The Overview of Results of Operations, etc. 2 2. Condensed Quarterly Consolidated Financial Statements and Notes Thereto 3 (1) Condensed Quarterly Consolidated Statements of Financial Position 3 (2) Condensed Quarterly Consolidated Statements of Profit or Loss and Condensed Quarterly Consolidated Statements of Comprehensive Income 5 (3) Condensed Quarterly Consolidated Statements of Changes in Equity 7 (4) Condensed Quarterly Consolidated Statements of Cash Flows 11 (5) Notes to the Condensed Quarterly Consolidated Financial Statements 13 (Note on Going Concern Assumptions) 13 (Segment Information) 13 (Assets Held for Sale) 16 (Earnings Per Share) 17 (Significant Subsequent Events) 18 - 1 -

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1. The Overview of Results of Operations, etc. The overview of consolidated results of operations, etc., for the first quarter of the fiscal year ending March 31, 2027, is disclosed on our company’s website and on TDnet (Timely Disclosure network) today through Flash Report Results of FY2026 1Q & Outlook for FY2026. - 2 -

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(Millions of yen) As of March 31, 2026 As of June 30, 2026 Assets Current assets Cash and cash equivalents 104,474 141,027 Trade and other receivables 167,365 165,643 Inventories 208,820 214,582 Other financial assets 12,179 10,517 Other current assets 20,155 19,055 Subtotal 512,993 550,823 Assets held for sale 15,089 6,446 Total current assets 528,082 557,270 Non-current assets Property, plant and equipment 218,141 218,098 Right-of-use assets 19,147 19,091 Goodwill 7,897 7,942 Intangible assets 50,967 52,838 Investment property 10,383 10,140 Investments accounted for using the equity method 37,996 39,337 Other financial assets 29,108 33,658 Retirement benefit asset 905 911 Deferred tax assets 13,373 6,878 Other non-current assets 4,116 4,021 Total non-current assets 392,033 392,914 Total assets 920,115 950,183 2. Condensed Quarterly Consolidated Financial Statements and Notes Thereto (1) Condensed Quarterly Consolidated Statements of Financial Position - 3 -

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(Millions of yen) As of March 31, 2026 As of June 30, 2026 Liabilities and equity Liabilities Current liabilities Trade and other payables 103,592 93,910 Bonds and borrowings 129,411 141,304 Lease liabilities 7,583 7,859 Other financial liabilities 10,613 8,847 Income taxes payable 3,730 9,900 Provisions 1,475 2,867 Other current liabilities 43,061 34,491 Subtotal 299,465 299,179 Liabilities directly associated with assets held for sale 2,452 2,682 Total current liabilities 301,917 301,861 Non-current liabilities Bonds and borrowings 182,064 159,076 Lease liabilities 17,354 16,997 Other financial liabilities 5,472 5,616 Retirement benefit liability 34,272 34,507 Provisions 1,007 1,613 Deferred tax liabilities 3,337 5,241 Other non-current liabilities 6,061 5,412 Total non-current liabilities 249,566 228,462 Total liabilities 551,483 530,323 Equity Share capital 71,833 71,833 Capital surplus 105,701 105,740 Retained earnings 138,509 178,506 Treasury shares (10,974) (10,976) Other components of equity 58,634 69,887 Other comprehensive income associated with assets held for sale 758 151 Total equity attributable to owners of parent 364,461 415,141 Non-controlling interests 4,171 4,719 Total equity 368,631 419,860 Total liabilities and equity 920,115 950,183 - 4 -

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(Millions of yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Revenue 243,117 221,943 Cost of sales (187,227) (163,322) Gross profit 55,890 58,621 Selling, general and administrative expenses (52,569) (48,851) Other income 2,056 50,725 Other expenses (3,083) (537) Operating income (loss) 2,295 59,959 Finance income 1,365 1,377 Finance costs (4,865) (1,777) Share of profit of investments accounted for using the equity method 1,267 272 Profit(loss) before tax 62 59,831 Income tax expense (631) (14,796) Profit(loss) (570) 45,035 Profit(loss) attributable to: Owners of parent (740) 45,106 Non-controlling interests 170 (72) Profit(loss) (570) 45,035 Earnings(loss) per share Basic earnings(loss) per share (3.84) 233.81 Diluted earnings(loss) per share (3.84) 233.73 (2) Condensed Quarterly Consolidated Statements of Profit or Loss and Condensed Consolidated Statements of Comprehensive Income (Condensed Consolidated Statements of Profit or Loss) - 5 -

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(Millions of yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Profit(loss) (570) 45,035 Other comprehensive income Items that will not be reclassified to profit or loss Financial assets measured at fair value through other comprehensive income 74 3,081 Remeasurements of defined benefit plans 186 (0) Share of other comprehensive income of investments accounted for using the equity method 2 2 Total of items that will not be reclassified to profit or loss 262 3,082 Items that may be reclassified to profit or loss Effective portion of cash flow hedges 1,390 3,169 Exchange differences on translation of foreign operations 4,610 4,992 Share of other comprehensive income of investments accounted for using the equity method (255) (528) Total of items that may be reclassified to profit or loss 5,746 7,633 Total other comprehensive income, net of tax 6,008 10,715 Comprehensive income 5,438 55,750 Comprehensive income attributable to: Owners of parent 5,263 55,832 Non-controlling interests 175 (83) Comprehensive income 5,438 55,750 (Condensed Quarterly Consolidated Statements of Comprehensive Income) For the three months ended June 30, 2025 and 2026 - 6 -

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(Millions of yen) Equity attributable to owners of parent Share capital Capital surplus Retained earnings Treasury shares Other components of equity Share acquisition rights Financial assets measured at fair value through other comprehe- nsive income Remeasur- ements of defined benefit plans Balance as of April 1, 2025 71,833 105,708 231,726 (11,411) 162 8,891 － Profit(loss) －－ (740) －－－－ Other comprehensive income －－－－－ 76 186 Total comprehensive income －－ (740) －－ 76 186 Purchase of treasury shares －－－ (1) －－－ Disposal of treasury shares － (10) － 36 (26) －－ Transfer of loss on disposal of treasury shares － 7 (7) －－－－ Share-based payment expenses － 33 － (8) －－－ Dividends －－ (4,818) －－－－ Transfer to non-financial assets －－－－－－－ Transfer to other comprehensive income associated with assets held for sale －－－－－－－ Change in scope of consolidation －－－－－－－ Transfer from other components of equity to retained earnings －－ 197 －－ (12) (186) Other －－－－－－－ Total transactions with owners － 30 (4,628) 28 (26) (12) (186) Balance as of June 30, 2025 71,833 105,738 226,358 (11,383) 136 8,956 － (3) Condensed Quarterly Consolidated Statements of Changes in Equity For the three months ended June 30, 2025 - 7 -

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(Millions of yen) Equity attributable to owners of parent Non- controlling interests Total equity Other components of equity Other comprehe- nsive income associated with assets held for sale Total equity attributable to owners of parent Effective portion of cash flow hedges Exchange differences on translation of foreign operations Total Balance as of April 1, 2025 930 24,672 34,655 (1,134) 431,378 7,164 438,541 Profit(loss) －－－－ (740) 170 (570) Other comprehensive income 1,390 4,351 6,003 － 6,003 5 6,008 Total comprehensive income 1,390 4,351 6,003 － 5,263 175 5,438 Purchase of treasury shares －－－－ (1) － (1) Disposal of treasury shares －－ (26) － 0 － 0 Transfer of loss on disposal of treasury shares －－－－－－－ Share-based payment expenses －－－－ 25 － 25 Dividends －－－－ (4,818) (40) (4,858) Transfer to non-financial assets (13) － (13) － (13) － (13) Transfer to other comprehensive income associated with assets held for sale － (3,948) (3,948) 3,948 －－－ Change in scope of consolidation －－－－－ (3,055) (3,055) Transfer from other components of equity to retained earnings －－ (197) －－－－ Other －－－－－－－ Total transactions with owners (13) (3,948) (4,185) 3,948 (4,807) (3,095) (7,901) Balance as of June 30, 2025 2,308 25,074 36,474 2,814 431,834 4,244 436,078 - 8 -

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(Millions of yen) Equity attributable to owners of parent Share capital Capital surplus Retained earnings Treasury shares Other components of equity Share acquisition rights Financial assets measured at fair value through other comprehe- nsive income Remeasur- ements of defined benefit plans Balance as of April 1, 2026 71,833 105,701 138,509 (10,974) 105 9,926 － Profit(loss) －－ 45,106 －－－－ Other comprehensive income －－－－－ 3,085 (0) Total comprehensive income －－ 45,106 －－ 3,085 (0) Purchase of treasury shares －－－ (2) －－－ Disposal of treasury shares －－－－－－－ Transfer of loss on disposal of treasury shares －－－－－－－ Share-based payment expenses － 39 －－－－－ Dividends －－ (4,823) －－－－ Transfer to non-financial assets －－－－－－－ Transfer to other comprehensive income associated with assets held for sale －－－－－ 11 － Change in scope of consolidation －－ (300) －－－－ Transfer from other components of equity to retained earnings －－ 13 －－ (13) － Other －－ 0 －－－－ Total transactions with owners － 39 (5,110) (2) － (3) － Balance as of June 30, 2026 71,833 105,740 178,506 (10,976) 105 13,009 (0) For the three months ended June 30, 2026 - 9 -

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(Millions of yen) Equity attributable to owners of parent Non- controlling interests Total equity Other components of equity Other comprehe- nsive income associated with assets held for sale Total equity attributable to owners of parent Effective portion of cash flow hedges Exchange differences on translation of foreign operations Other Balance as of April 1, 2026 (1,736) 50,339 58,634 758 364,461 4,171 368,631 Profit(loss) －－－－ 45,106 (72) 45,035 Other comprehensive income 3,169 4,472 10,726 － 10,726 (11) 10,715 Total comprehensive income 3,169 4,472 10,726 － 55,832 (83) 55,750 Purchase of treasury shares －－－－ (2) － (2) Disposal of treasury shares －－－－－－－ Transfer of loss on disposal of treasury shares －－－－－－－ Share-based payment expenses －－－－ 39 － 39 Dividends －－－－ (4,823) (61) (4,884) Transfer to non-financial assets (67) － (67) － (67) － (67) Transfer to other comprehensive income associated with assets held for sale －－ 11 (11) －－－ Change in scope of consolidation － 596 596 (596) (300) 692 392 Transfer from other components of equity to retained earnings －－ (13) －－－－ Other －－－－ 0 － 0 Total transactions with owners (67) 596 527 (607) (5,152) 631 (4,521) Balance as of June 30, 2026 1,366 55,408 69,887 151 415,141 4,719 419,860 - 10 -

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(Millions of yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Cash flows from operating activities Profit (loss) before tax 62 59,831 Depreciation and amortization 15,311 12,385 Impairment losses 3,679 29 Share of loss (profit) of investments accounted for using the equity method (1,267) (272) Increase or decrease in retirement benefit asset or liability (165) 156 Interest and dividend income (1,123) (934) Interest expenses 2,490 1,578 Loss (gain) on sale or disposal of fixed assets 109 (4,865) Loss (gain) on sale of shares of subsidiaries (605) (45,452) Decrease (increase) in trade and other receivables 6,731 4,282 Decrease (increase) in inventories 5,177 (265) Increase (decrease) in trade and other payables (5,737) (7,427) Other (5,658) 1,185 Subtotal 19,004 20,232 Interest and dividends received 975 980 Interest paid (1,845) (1,107) Income taxes paid (1,512) (2,852) Net cash provided by (used in) operating activities 16,622 17,254 Cash flows from investing activities Payments into time deposits － (1,800) Proceeds from withdrawal of time deposits 4 2,206 Purchase of property, plant and equipment (20,291) (11,494) Proceeds from sale of property, plant and equipment 24 5,205 Purchase of intangible assets (1,105) (3,938) Purchase of investment securities (449) (160) Proceeds from sale of investment securities 0 45,155 Net decrease (increase) in short-term loans receivable (22) (51) Proceeds from (payments for) sale of shares of subsidiaries resulting in change in scope of consolidation 3,332 1,111 Other (44) 116 Cash flows from investing activities (18,550) 36,350 (4) Condensed Quarterly Consolidated Statements of Cash Flows - 11 -

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(Millions of yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Net cash provided by (used in) financing activities Net increase (decrease) in short-term borrowings 104,268 (11,727) Repayments of long-term borrowings (42) (2) Repayments of lease liabilities (1,598) (1,198) Purchase of treasury shares (1) (2) Dividends paid to owners of parent (4,818) (4,823) Dividends paid to non-controlling interests (40) (61) Net cash provided by (used in) financing activities 97,769 (17,812) Effect of exchange rate changes on cash and cash equivalents 200 787 Net increase (decrease) in cash and cash equivalents 96,041 36,578 Cash and cash equivalents at beginning of period 107,538 104,474 Net increase (decrease) in cash and cash equivalents included in assets held for sale 1,784 (25) Cash and cash equivalents at end of period 205,364 141,027 - 12 -

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(5) Notes to the Condensed Quarterly Consolidated Financial Statements (Note on Going Concern Assumptions) Not applicable. Segments Lines of business Apparel & Industries Production and sale of fiber products, and production and sale of polyester fibers and fabrics, etc. Healthcare & Life Solutions Production and sale of pharmaceuticals and medical devices, etc. and the provision of home healthcare services, and production and sale of other healthcare-related products. Electronics & Energy Production and sale of resin, battery materials & membrane. Specialty Materials Production and sale of aramid fibers, carbon fibers, and composites. (Segment Information) (1) Overview of reportable segments The Teijin Group’s reportable operating segments are the components of the Teijin Group for which separate financial information is available and evaluated regularly by its Board of Directors in determining the allocation of management resources and in assessing performance. The Teijin Group currently divides its operations into business fields, based on type of product, nature of business, and services provided. For the products and services of each business field, the Teijin Group formulates comprehensive strategies, in Japan and overseas, to drive its business activities forward. Accordingly, the Teijin Group divides its operations into reportable operating segments on the same basis as it uses internally so the Teijin Group sets the four reportable segments, which are “Apparel & Industries,” “Healthcare & Life Solutions,” “Electronics & Energy,” and “Specialty Materials.” The principal lines of business of each segment after the change are as follows. (Changes in reportable operating segments) For the three months ended June 30, 2026, the Company changed its reportable operating segments from the previous three segments of “Materials,” “Fibers & Products Converting,” and “Healthcare” to the following four segments: “Apparel & Industries,” “Healthcare & Life Solutions,” “Electronics & Energy,” and “Specialty Materials.” This change reflects the organizational restructuring implemented on April 1, 2026. Through this reorganization, the Company will operate its organizational structure in line with the stage of development of the Customer- Driven business, thereby further deepening this business model. In the materials businesses, the Company will also promote a transformation from a Material-driven business to Customer-Diven business and applications. Segment information for the three months ended June 30, 2025 is disclosed based on the new classification of reportable operating segments. - 13 -

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(Millions of yen) Reportable operating segments Others (Note 1) Total Adjustments (Note 2) Amount on condensed quarterly consolidated financial statements Apparel & Industries Healthcare & Life Solutions Electronics & Energy Specialty Materials Subtotal Revenue External 82,118 33,832 36,648 83,596 236,193 6,924 243,117 － 243,117 Intersegment 578 － 453 2,566 3,598 784 4,382 (4,382) － Total 82,696 33,832 37,101 86,162 239,790 7,709 247,499 (4,382) 243,117 Adjusted operating income (Note 3) 4,087 4,001 5,089 (1,765) 11,412 (338) 11,074 (3,227) 7,847 (Millions of yen) Reportable operating segments Others (Note 1) Total Adjustments (Note 2) Amount on condensed quarterly consolidated financial statements Apparel & Industries Healthcare & Life Solutions Electronics & Energy Specialty Materials Subtotal Revenue External 91,705 32,949 45,271 47,924 217,850 4,093 221,943 － 221,943 Intersegment 552 － 907 2,682 4,140 801 4,941 (4,941) － Total 92,256 32,949 46,178 50,606 221,990 4,894 226,884 (4,941) 221,943 Adjusted operating income (Note 3) 4,770 4,583 8,534 (1,026) 16,861 (1,804) 15,058 (2,751) 12,307 (2) Segment revenue and performance Results of the First Quarter of FY2025 (April 1, 2025 through June 30, 2025) Note 1. “Others,” which includes regenerative medicine & implantable medical device business, does not qualify. Note 2. Adjustments of the adjusted operating income of (3,227) million yen include the elimination of intersegment transactions of (197) million yen and corporate expenses of (3,030) million yen. Corporate expenses are mainly expenses related to administrative divisions of the head office that are not attributable to the reportable segments. Note 3. Adjusted operating income is calculated by adding share of profit (loss) of investments accounted for using the equity method to operating income and excluding gains and losses due to nonrecurring factors, which include nonrecurring gains and losses such as financial gains and losses and impairment losses in share of profit (loss) of investments accounted for using the equity method. Results of the First Quarter of FY2026 (April 1, 2026 through June 30, 2026) Note 1. “Others,” which includes regenerative medicine & implantable medical device business, does not qualify. Note 2. Adjustments of the adjusted operating income of (2,751) million yen include the elimination of intersegment transactions of (64) million yen and corporate expenses of (2,687) million yen. Corporate expenses are mainly expenses related to administrative divisions of the head office that are not attributable to the reportable segments. Note 3. Adjusted operating income is calculated by adding share of profit (loss) of investments accounted for using the equity method to operating income and excluding gains and losses due to nonrecurring factors, which include nonrecurring gains and losses such as financial gains and losses and impairment losses in share of profit (loss) of investments accounted for using the equity method. - 14 -

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(Millions of yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Adjusted operating income 7,847 12,307 Gain on sale of fixed assets 10 4,987 Loss on disposal of fixed assets (119) (122) Impairment losses (3,679) (29) Special retirement benefits (Note 1) (1,498) (2,149) Gain (loss) on sale of shares of affiliates (Note 2) 605 45,452 Share of loss(profit) of investments accounted for using the equity method (Note 3) (1,364) (143) Other 493 (345) Operating income (loss) 2,295 59,959 Finance income 1,365 1,377 Finance costs (4,865) (1,777) Share of profit (loss) of investments accounted for using the equity method 1,267 272 Profit (loss) before tax 62 59,831 The adjustment from adjusted operating income to profit before tax is as follows: Note 1. “Special retirement benefits” for FY2025 and FY2026, mainly relate to business structural reform. Note 2. Gain (loss) on sale of shares of affiliates for the three months ended June 30, 2026 resulted from the sale of shares of DuPont Teijin Advanced Papers Limited and DuPont Teijin Advanced Papers (Asia) Limited. Note 3. Adjusted operating income is calculated by adding share of profit (loss) of investments accounted for using the equity method to operating income and excluding gains and losses due to nonrecurring factors, which include nonrecurring gains and losses such as financial gains and losses and impairment losses in share of profit (loss) of investments accounted for using the equity method. - 15 -

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(Assets Held for Sale) Overview of assets held for sale The main items of assets and liabilities held for sale as of June 30, 2026 are certain inventories held by Teijin Pharma Limited in the Healthcare & Life Solutions Segment. In the fiscal year ended March 31, 2026, investments in DuPont Teijin Advanced Papers Limited and DuPont Teijin Advanced Papers (Asia) Limited, which were affiliates accounted for using equity method, had been classified as assets held for sale. During the three months ended June 30, 2026, the Company completed the transfer of the shares it held in these companies to DuPont de Nemours, Inc. and recorded a gain on sale of shares of affiliates of ¥45,452 million under “Other income” in the condensed quarterly consolidated statement of income. Proceeds from the sale of ¥45,114 million were recorded under “Proceeds from sale of investment securities” in the condensed quarterly consolidated statement of cash flows. - 16 -

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(Yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Basic earnings (loss) per share (3.84) 233.81 Diluted earnings (loss) per share (3.84) 233.73 (Millions of yen) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Profit (loss) attributable to common shareholders of parent (740) 45,106 Profit (loss) attributable to common shareholders of parent after adjustment for the effects of dilutive potential shares (740) 45,106 (Thousands of shares) For the three months ended June 30, 2025 For the three months ended June 30, 2026 Weighted-average number of common shares 192,727 192,915 Increase in number of common shares by share subscription rights (Note) － 67 Weighted-average number of common shares (diluted) 192,727 192,982 (Earnings Per Share) (1) Basic earnings per share and diluted earnings per share (2) Basis of calculating basic earnings per share and diluted earnings per share Note. For the three months ended June 30, 2025, there were 94 thousand potentially dilutive common shares. However, these were excluded from the calculation of diluted earnings per share due to their anti-dilutive effect. - 17 -

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(1) Date of disposal July 15, 2026 (2) Class and number of shares for disposal 53,479 ordinary shares of the Company (3) Disposal price ¥1,650 per share (4) Total value of disposal ¥88,240,350 (5) Allottees and number thereof, and number of shares for disposal Directors (excluding Outside Directors), 3 persons, 11,878 shares Teijin Group Corporate Officers, 11 persons, 25,028 shares Mission Executives, 1 person, 1,576 shares Executives of overseas Teijin Group company, 4 persons, 14,997 shares (6) Other With respect to the disposal of treasury shares, an extraordinary report has been submitted under the Financial Instruments and Exchange Act for the portion allocated to eligible executives of overseas Teijin Group companies. No extraordinary report is required for the portion allocated to the eligible directors. (1) Date of disposal July 15, 2026 (2) Class and number of shares for disposal 102,484 ordinary shares of the Company (3) Disposal price ¥1,650 per share (4) Total value of disposal ¥169,098,600 (5) Allottees and number thereof, and number of shares for disposal Directors (excluding Outside Directors), 3 persons, 18,411 shares Teijin Group Corporate Officers (including two (2)retired members), 14 persons, 34,928 shares Mission Executives (including four(4) retired members), 5 persons, 28,716 shares Executives of overseas Teijin Group company, 3 persons, 20,429 shares (6) Other With respect to the disposal of treasury shares, an amended extraordinary report has been submitted under the Financial Instruments and Exchange Act for the portion allocated to overseas-resident eligible directors and executives of overseas Teijin Group companies. No extraordinary report is required for the portion allocated to the other eligible directors. (Significant Subsequent Events) (The Disposal of Treasury Shares as “Restricted Stock” and “Performance Share Units”) At a meeting of its Board of Directors held on June 19, 2026, the Company resolved to dispose of treasury shares as “Restricted Stock” and “Performance Share Units” (the “Disposal of Treasury Shares” or the “Disposal”), and disposed the treasury shares on July 15, 2026 as follows: 1. Overview of the Disposal of Treasury Shares (1) Restricted Stock (2) Performance Share Units - 18 -

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2. Purpose and Reasons for the Disposal The Company has introduced the Restricted Stock Plan and the Performance Share Units Plan for Directors who concurrently serve as Teijin Group Corporate Officers, Teijin Group Corporate Officers and Mission Executives (hereinafter collectively referred to as the “Eligible Directors”) (such stock compensation plans are hereinafter collectively referred to as the “Plans for Directors”). The Plans for Eligible Directors are intended to align with the viewpoint of corporate governance and stakeholders and to further strengthen corporate value creation from a medium- to long-term perspectives (sustainability, ESG), as well as to increase the motivation to contribute to increasing the Company’s stock value by adopting an approach to take into account the funds for tax payable upon the time of release of transfer restrictions and enhancing the operability of the stock compensation plans. They also aim to establish the Company's executive compensation system as a global company, considering the Eligible Directors subject to overseas compensation plans (i.e., Eligible Directors who have also concluded employment contracts, etc. with Teijin Group companies outside Japan and originally belong to those companies) (hereinafter referred to as the “Eligible Directors subject to overseas plans”). In addition, separately from the Plans for Directors, the Company has introduced the Restricted Stock Plan and the Performance Share Units Plan for Mission Executives who have concluded employment contracts, etc. with Teijin Group companies outside Japan and originally belong to those companies (excluding Eligible Directors subject to overseas plans) and Executives of overseas Teijin Group companies who belong to Teijin Group companies outside Japan (hereinafter referred to as “Overseas Allottees”) (such stock compensation plans are hereinafter collectively referred to as the “Plans for Overseas Allottees”, and together with the Plans for Directors, collectively referred to as the “Plans”). The Plans for Overseas Allottees are intended to provide incentives toward achievement of the Company’s Medium-Term Management Plan and increasing corporate value over the medium to long-term, as well as to further align shared values with stakeholders. The Disposal of Treasury Shares was carried out based on a resolution of the Board of Directors adopted on June 19, 2026, in accordance with the Plans for Eligible Directors (including Eligible Directors subject to overseas plans) and Overseas Allottees. - 19 -

Interim report