[Amended] Material event report (rights offering)

What happened

Material Event Report (Rights Offering Decision) 6.4 Thumbage Co., Ltd. Amendment Report (Filing), August 5, 2026

1. Disclosure document being amended: Material event report (rights offering decision) 2. Original filing date of the document being amended: April 10, 2026 3. Amendment details

Item: Rights offering decision Reason for amendment: The Company submitted a securities registration statement on April 10, 2026 under an initial board resolution to pursue a rights offering (with public offering of forfeited shares after shareholder allocation) to raise operating funds. During the offering process, the statement became effective after two rounds of amendment requested by the Financial Supervisory Service and two voluntary amendments; however, as the offering period grew prolonged, the Company's financial condition and market circumstances changed. In consultation with the lead underwriter, the Company judged that the prolonged offering period could trigger designation as an administrative issue under listing regulations and cause confusion to existing shareholders and new investors, and therefore decided it was unavoidable to withdraw the rights offering. Before: Rights offering decision After: Rights offering withdrawn

Material Event Report / Exchange reporting obligation matter To: Financial Services Commission / Korea Exchange August 5, 2026 Company name: Thumbage Co., Ltd. CEO: Jung Ki-hong Head office: 6th Floor, Building B, Dodam Building, 246 Hwangsaeul-ro, Bundang-gu, Seongnam-si, Gyeonggi-do (Sunae-dong) (Phone) 031-714-1381 (Website) http://www.thumbage.co.kr Preparer: (Title) General Manager (Name) Kim Jung-hyun (Phone) 031-714-1381

Rights Offering Decision 1. Type and number of new shares: Common shares (shares) -; Other shares (shares) - 2. Par value per share (KRW): - 3. Total shares issued before the capital increase (shares): Common shares -; Other shares - 4. Purpose of financing: Facility funds (KRW) -; Business acquisition funds (KRW) -; Operating funds (KRW) -; Debt repayment funds (KRW) -; Funds to acquire securities of other companies (KRW) -; Other funds (KRW) - 5. Method of capital increase: Shareholder-allocation rights offering with general public offering of forfeited shares 6. New share issue price: Final issue price, Common shares (KRW) -; Other shares (KRW) -; Expected issue price, Common shares (KRW) -, expected determination date -; Other shares (KRW) -, expected determination date - 7. Method of determining issue price: - 8. New share allotment record date: - 9. Number of new shares allotted per share (shares): - 10. Preferential allotment ratio for employee stock ownership plan members (%): - 11. Expected subscription date: Employee stock ownership plan, start - / end -; Existing shareholders, start - / end - 12. Payment date: - 13. Treatment plan for forfeited shares: - 14. New shares' dividend base date: - 15. Expected new share certificate delivery date: - 16. Expected new share listing date: - 17. Lead underwriter (if not a direct offering): - 18. Transferability of new share subscription rights: Yes - Listing of new share subscription warrants: Yes - Financial investment business operator handling trading/brokerage of the warrants: - 19. Board resolution date (decision date): - - Independent (outside) director* attendance: Present (persons) - / Absent (persons) - - Auditor (audit committee member) attendance: - 20. Subject to securities registration statement submission: No 21. Reason for exemption from submission: - 22. Subject to a prohibited short-sale trading period for subscription: No; start date -; end date - 23. Subject to Fair Trade Commission reporting: Not applicable * For listed companies, "independent director"; for unlisted companies, "outside director" 24. Other matters for reference in investment judgment The Company submitted a securities registration statement on April 10, 2026 under an initial board resolution to pursue a rights offering (with public offering of forfeited shares after shareholder allocation) to raise operating funds. During the offering process, the statement became effective after two rounds of amendment requested by the Financial Supervisory Service and two voluntary amendments; however, as the offering period grew prolonged, the Company's financial condition and market circumstances changed. In consultation with the lead underwriter, the Company judged that the prolonged offering period could trigger designation as an administrative issue under listing regulations and cause confusion to existing shareholders and new investors, and therefore decided it was unavoidable to withdraw the rights offering.