Material event report (equity acquisition)

What happened

Decision to Acquire Equity and Equity-Linked Securities of Another Company 6.0 Hyper Corporation Co., Ltd. Material Event Report / Korea Exchange Disclosure Obligation To: Financial Services Commission / Korea Exchange July 16, 2026 Company Name: Hyper Corporation Co., Ltd. CEO: Lee Sang-seok, An Eun-cheol Head Office Address: 15F, Doosan Building, 726 Eonju-ro, Gangnam-gu, Seoul Phone: 02-6388-0720 Website: http://www.hyper-corp.com Preparer: Team Leader, Si Seong-ho, Phone: 02-6388-0720

Decision to Acquire Equity and Equity-Linked Securities of Another Company

1. Issuing Company Company name: Cubist Co., Ltd. Nationality: Republic of Korea Representative: Oh Young-woo Capital (KRW): 300,000,000 Relationship with the company: - Total shares issued: 600,000 Main business: Sale of beauty and medical devices Whether shares were acquired through third-party allotment within the last 6 months: No

2. Acquisition Details Number of shares to be acquired: 600,000 Acquisition amount (KRW) (A): 9,500,000,000 Total assets (KRW) (B): 71,935,567,196 A/B ratio (%): 13.21 Equity capital (KRW) (C): 30,312,034,050 A/C ratio (%): 31.34

3. Shares Owned and Equity Ratio After Acquisition Shares owned: 600,000 Equity ratio (%): 100

4. Purpose of Acquisition: Business diversification and securing a new growth engine through the equity acquisition

5. Scheduled Acquisition Date: July 16, 2026

6. Counterparty Company name (name): Oh Young-woo Capital (KRW): - Main business: - Head office address: Songpa-gu, Seoul Relationship with the company: -

7. Payment of Transaction Price 1. Payment method: Substitute payment using Hyper Corporation's 16th-series convertible bonds (16CB) 2. Payment schedule: 1st installment: July 16, 2026 - 16CB worth KRW 9 billion; 2nd installment: July 27, 2026 - 16CB worth KRW 500 million 3. Funding method: Substitute payment using convertible bonds already held

8. External Valuation Whether an external valuation was obtained: Yes Basis and reason: 1. Basis: A valuation opinion was obtained for use in preparing and as an attachment to the material event report to be submitted to the Financial Services Commission under Article 161 of the Financial Investment Services and Capital Markets Act and Article 171 of its Enforcement Decree. 2. Reason: Prepared to serve as reference material for the company's internal decision-making on the share acquisition transaction, and to be used in preparing and as an attachment to the material event report submitted under the Financial Investment Services and Capital Markets Act. External valuation firm: Daesung Accounting Corporation External valuation period: July 6, 2026 - July 15, 2026 External valuation opinion: The firm used financial data, future investment and business plans, various statistical data and market analysis data for the relevant industry provided by the company being valued. Based on its analysis, the firm calculated that, as of the valuation date, the value of the shares of Cubist Co., Ltd. to be acquired (600,000 shares, 100% equity ratio) is estimated to be in the range of KRW 9,079 million to KRW 11,798 million, and no grounds were found to consider the actual scheduled acquisition price of KRW 9,500 million inappropriate from a materiality standpoint.

9. Board resolution date (decision date): July 16, 2026 Attendance of outside directors: Present: 1; Absent: - Attendance of the auditor (audit committee member who is not an outside director): Present

10. Whether this constitutes a backdoor listing: No Plans for third-party allotment capital increase etc. within the next 6 months: No

11. Whether the issuing company (the other company) meets the requirements for a backdoor listing: No

12. Whether subject to reporting to the Fair Trade Commission: Not applicable

13. Whether a put option or similar contract was entered into: No Contract details: -

14. Future Plans for Corporate Restructuring: The company plans to maintain its management system and enhance its independence and efficiency to increase corporate value.

15. Other Material Matters Relevant to Investment Decisions - In Item 2 "Acquisition Details" above, the company's total assets are based on the consolidated financial statements as of the end of the most recent fiscal year (2025), and equity capital is the total equity under those consolidated financial statements adjusted for changes in paid-in capital and capital surplus up to the disclosure date. - Regarding Item 5 above, ownership of the target shares transfers as soon as the transferor receives the first installment (July 16, 2026) from the transferee, so the scheduled acquisition date is stated as the first installment payment date. - For details on Item 8, External Valuation, please refer to the attached "External Valuation Firm's Opinion Letter." - The above is subject to change depending on future developments, and an amended disclosure will be filed if changes occur. Related disclosures: None

[Summary Financial Status of the Issuing Company] (Unit: KRW million) Current year: Total assets 7,998; Total liabilities 2,406; Total equity 5,593; Capital 300; Revenue 7,919; Net income -30; Audit opinion -; External auditor - Prior year: Total assets 7,634; Total liabilities 1,992; Total equity 5,642; Capital 300; Revenue 9,960; Net income 319; Audit opinion -; External auditor - Year before that: Total assets 11,319; Total liabilities 5,976; Total equity 5,343; Capital 300; Revenue 9,042; Net income 84; Audit opinion -; External auditor -

[Matters Concerning the Counterparty] 1. Personal Details - Basic Information Name: Oh Young-woo; Nationality: Republic of Korea; Address (head office) [district/town/dong only]: Songpa-gu, Seoul; Occupation (business description): Businessperson Status and financial condition of the largest shareholder, CEO, and representative executive officer (if the counterparty is a corporation): Largest shareholder: Name -; Shares -; Equity ratio (%) - CEO: Name -; Shares -; Equity ratio (%) - (Unit: KRW) Most recent fiscal year -; Fiscal year-end -; Total assets -; Capital -; Total liabilities -; Revenue -; Total equity -; Net income/loss -; External auditor -; Suspension of business -; Audit opinion -; Business closure - 2. Relationship with the Company or Its Largest Shareholder/Officers Relationship between the company and the counterparty: - Relationship between the company's largest shareholder/officers and the counterparty: Name -; Relationship with counterparty - 3. Transactions in the Last 3 Years (excluding routine transactions) Current year: -; Prior year: -; Year before that: -