[TPK-KY] Correction of Endorsement and Guarantee Information Disclosure Details for January to April 2026 (Supplemental Information on ITH Corporation)

1. Date of Event: 06/12/115 2. Company Name: TPK Holding Co., Ltd. 3. Relationship with Company (Enter '本公司' or 'Subsidiary'):本公司 (Parent Company) 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Supplement endorsement and guarantee information for ITH Corporation from January to April 115 6. Corrected Information Item / Report Name: Endorsement and Guarantee Information Disclosure Details 7. Information Before Correction / Amount / Page: ITH Corporation's endorsement and guarantee information was not disclosed 8. Information After Correction / Amount / Page:

(1) January 115 No.: 2 Endorser Company Name: ITH Corporation Guaranteed Entity: Ilitek Corporation, Relationship: 2, Shareholding Ratio (%): 100 Endorsement limit per single entity: 9,895,923 Cumulative maximum balance to date: 188,790 Monthly increase/decrease amount for individual subsidiary: 0 End-of-period endorsement balance: 188,790 Amount actually drawn: 169,537 Endorsement amount secured by property: 0 Ratio of cumulative endorsement amount to latest financial statement net value: 0.49% Maximum endorsement limit: 9,895,923 Parent-to-subsidiary endorsement: Y Subsidiary-to-parent endorsement: N Endorsement related to Mainland China: N Additional Note 2: ITH Corporation’s endorsement limit and total amount for Ilitek, a wholly-owned subsidiary with 100% voting rights, shall not exceed 50% of ITH Corporation’s current net value.

(2) February 115 No.: 2 Endorser Company Name: ITH Corporation Guaranteed Entity: Ilitek Corporation, Relationship: 2, Shareholding Ratio (%): 100 Endorsement limit per single entity: 10,006,677 Cumulative maximum balance to date: 188,790 Monthly increase/decrease amount for individual subsidiary: 0 End-of-period endorsement balance: 187,350 Amount actually drawn: 126,574 Endorsement amount secured by property: 0 Ratio of cumulative endorsement amount to latest financial statement net value: 0.49% Maximum endorsement limit: 10,006,677 Parent-to-subsidiary endorsement: Y Subsidiary-to-parent endorsement: N Endorsement related to Mainland China: N Additional Note 2: ITH Corporation’s endorsement limit and total amount for Ilitek, a wholly-owned subsidiary with 100% voting rights, shall not exceed 50% of ITH Corporation’s current net value.

(3) March 115 No.: 2 Endorser Company Name: ITH Corporation Guaranteed Entity: Ilitek Corporation, Relationship: 2, Shareholding Ratio (%): 100 Endorsement limit per single entity: 10,006,677 Cumulative maximum balance to date: 191,970 Monthly increase/decrease amount for individual subsidiary: 0 End-of-period endorsement balance: 191,970 Amount actually drawn: 122,869 Endorsement amount secured by property: 0 Ratio of cumulative endorsement amount to latest financial statement net value: 0.49% Maximum endorsement limit: 10,006,677 Parent-to-subsidiary endorsement: Y Subsidiary-to-parent endorsement: N Endorsement related to Mainland China: N Additional Note 2: ITH Corporation’s endorsement limit and total amount for Ilitek, a wholly-owned subsidiary with 100% voting rights, shall not exceed 50% of ITH Corporation’s current net value.

(4) April 115 No.: 2 Endorser Company Name: ITH Corporation Guaranteed Entity: Ilitek Corporation, Relationship: 2, Shareholding Ratio (%): 100 Endorsement limit per single entity: 10,181,141 Cumulative maximum balance to date: 191,970 Monthly increase/decrease amount for individual subsidiary: 0 End-of-period endorsement balance: 189,360 Amount actually drawn: 125,450 Endorsement amount secured by property: 0 Ratio of cumulative endorsement amount to latest financial statement net value: 0.48% Maximum endorsement limit: 10,181,141 Parent-to-subsidiary endorsement: Y Subsidiary-to-parent endorsement: N Endorsement related to Mainland China: N Additional Note 2: ITH Corporation’s endorsement limit and total amount for Ilitek, a wholly-owned subsidiary with 100% voting rights, shall not exceed 50% of ITH Corporation’s current net value.

9. Countermeasures: Supplemental filing of information 10. Other Matters to be Disclosed: As ITH Corporation is included in the Company's financial reporting, endorsement and guarantee information has been supplemented and included in the filing.