Material event report (equity acquisition)

What happened

Decision to acquire shares and equity securities of another company 6.0 Adbiotech Co., Ltd. Material event report / Korea Exchange reporting matter

To the Financial Services Commission / Korea Exchange July 3, 2026

Company name: Adbiotech Co., Ltd. Representative Director: Kim Do-hyung Head office address: 39 Geodudanji 1-gil, Dongnae-myeon, Chuncheon-si, Gangwon State (Tel) 070-4193-4006 (Website) http://www.adbiotech.com Preparer: (Title) Director (Name) Choi Kyung-min (Tel) 070-4193-4006

Decision to acquire shares and equity securities of another company

1. Issuing company Company name: Onheal Co., Ltd. Nationality: Republic of Korea Representatives: Kim Do-hyung, Yoo Jung-woo Capital stock (KRW): 14,765,790,000 Relationship with the Company: Concurrent officer/employee Total number of issued shares (shares): 1,476,579 Main business: Pharmaceuticals, animal medicines - Whether new shares were acquired via third-party allotment within the last 6 months: No

2. Acquisition details Number of shares acquired (shares): 181,269 Acquisition amount (KRW) (A): 9,969,795,000 Total assets (KRW) (B): 48,407,432,103 (A/B) (%): 20.60 Equity capital (KRW) (C): 34,084,534,454 (A/C) (%): 29.25

3. Number of shares owned and equity ratio after acquisition Number of shares owned (shares): 181,269 Equity ratio (%): 12.28

4. Purpose of acquisition: Business diversification

5. Expected acquisition date: 2026.07.03

6. Counterparty Company name (name): Hiworks Co., Ltd. and 1 other Capital stock (KRW): - Main business: - Head office address: - Relationship with the Company: -

7. Payment of the purchase price 1) Form of payment: Cash payment 2) Timing of payment: July 3, 2026 (paid in full after contract execution) 3) Method of funding: Own funds

8. Matters concerning external valuation Whether an external valuation was conducted: Yes - Basis and reason: 1) Basis: Article 161 of the Financial Investment Services and Capital Markets Act and Article 171 of its Enforcement Decree (where the asset value to be acquired is 10% or more of total assets based on the financial statements as of the end of the most recent fiscal year) 2) Reason: To be used as reference material to assess the appropriateness of the acquisition price for the share acquisition transaction and to be attached to the material event report Name of external valuer: Hyundai Accounting Corporation External valuation period: 2026.05.13 ~ 2026.07.02 External valuation opinion: Appropriate (see the attached opinion of the external valuer for details)

9. Board resolution date (decision date): 2026.07.03 - Outside directors' attendance: Present (persons) 2; Absent (persons) - - Attendance of auditors (audit committee members who are not outside directors): Absent

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

11. Whether the issuing company (the other company) meets the backdoor-listing requirements: Not applicable

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

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

14. Future plans regarding corporate restructuring - As of the date of this report, the Company has not made any specific decision regarding a merger or other corporate restructuring.

15. Other material matters for reference in investment decisions 1) Through this board resolution, the Company plans to acquire a 12.28% stake (181,269 shares) in the issuing company. (1) Payment - Payment date: 2026.07.03 - Payment method: Cash payment - Payment amount: KRW 9,969,795,000 2) The information in "1. Issuing company" above is based on the most recent fiscal year's audit report. 3) The expected acquisition date above is the final payment date (the funding date) under the agreement between the parties and also the transaction closing date. 4) The total assets in "2. Acquisition details" above are stated based on the consolidated financial statements as of the end of the immediately preceding fiscal year (end of 2025), and the equity capital figure reflects changes in capital stock and capital surplus applied to the equity capital amount on the consolidated statement of financial position as of the end of the immediately preceding fiscal year. 5) The [Summary financial status of the issuing company] below is prepared based on Onheal Co., Ltd.'s audit reports for the current year (2025), the prior year (2024) and the year before that (2023).

* Related disclosure: -

[Summary financial status of the issuing company] (Unit: KRW million) Category: Total assets; Total liabilities; Total equity; Capital stock; Revenue; Net income; Audit opinion; External auditor Current year: 44,920; 19,029; 25,890; 14,766; 27,780; -2,120; Unqualified; Deol Accounting Corporation Prior year: 47,090; 19,080; 28,011; 14,766; 29,501; -11,548; Unqualified; Taesung Accounting Corporation Year before that: 56,520; 17,353; 39,167; 14,766; 16,645; -426; Qualified; Taesung Accounting Corporation

[Matters concerning the counterparty] 1. Personal details -- basic information Name (company name): Hiworks Co., Ltd., Jo Hyun-seon Nationality: Republic of Korea Address (head office address) [disclosed up to town/township/district level]: Gimpohangang-ro, Gimpo-si, Gyeonggi-do; Yeonsu-gu, Incheon Occupation (business description): Retail sale of pet animals and related supplies

- Status of the largest shareholder, representative director/executive officer and financial status (where the counterparty is a corporation) Category: Name; Number of shares; Equity ratio (%) Largest shareholder: Oh Yun-jin; 10,000; 100 Representative Director: Ryu Tae-seong; -; - (Unit: KRW million) Most recent fiscal year: 2025, fiscal year-end December Total assets: 7,269; Capital stock: 100 Total liabilities: 6,075; Revenue: 1,643 Total equity: 1,194; Net income (loss): 703 External auditor: - Suspension of business: No Audit opinion: - Closure of business: No

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: Ryu Tae-seong; Relationship with counterparty: Representative Director, a corporation wholly owned (100%) by a related party of the representative director of Onheal Pet Co., Ltd., a subsidiary of the issuing company

3. Transaction history over the last 3 years (excluding ordinary transactions) Category: Transaction details Current year: - Prior year: - Year before that: -