[Amended] Material event report (decision to sell own convertible bonds)

A later amendment corrects this filing, so the terms on this page may be out of date. See the latest version (2026-09-03) →

What happened

Material Event Report (Decision to Sell Own Convertible Bonds) 6.0 Adbiotech Co., Ltd. Amendment Report (Correction) July 30, 2026 1. Disclosure document being amended: Material event report (decision to sell own convertible bonds) 2. Original filing date of the disclosure document being amended: March 27, 2026 3. Amendment details Item: 13. Other matters material to investment decisions; reason for amendment: change of buyer (Note 1) (Note 2)

(Note 1) [Matters Related to the Buyers] Pinetree Investment Partnership: relationship to the company or largest shareholder -; selection process: selected considering the investor's payment capacity and timing, etc., to raise funds needed for company management; transactions within 6 months before/after the sale decision -; face value of bonds purchased (KRW): 1,500,000,000; note - Park Jin-hwan: relationship -; selection process: same as above; transactions -; face value of bonds purchased (KRW): 1,000,000,000; note - Oh In-seop: relationship -; selection process: same as above; transactions -; face value of bonds purchased (KRW): 500,000,000; note -

[Where the Buyer Includes a Corporation or Organization] (1) Basic information on the corporation or organization Pinetree Investment Partnership: number of investors 4; representative (managing partner): Kang Hyo-jae, 1%; operator (managing partner): -; largest shareholder (largest investor): Jeong Yu-jung, 33% (2) Key financial information for the most recent fiscal year (Unit: KRW million) Fiscal year -; total assets -; revenue -; total liabilities -; net income -; total equity -; external auditor -; paid-in capital -; audit opinion -

(Note 2) [Matters Related to the Buyers] K-Polaris Investment Partnership: relationship to the company or largest shareholder -; selection process: selected considering the investor's payment capacity and timing, etc., to raise funds needed for company management; transactions within 6 months before/after the sale decision -; face value of bonds purchased (KRW): 3,000,000,000; note -

[Where the Buyer Includes a Corporation or Organization] (1) Basic information on the corporation or organization K-Polaris Investment Partnership: number of investors 4; representative (managing partner): Seong Jae-ik, 25%; operator (managing partner): -; largest shareholder (largest investor): Seong Jae-ik, 25% (2) Key financial information for the most recent fiscal year (Unit: KRW million) Fiscal year: December 2025; total assets -; revenue -; total liabilities -; net income -; total equity -; external auditor -; paid-in capital -; audit opinion -

Material Event Report / Exchange Reporting Obligation To the Financial Services Commission / Korea Exchange March 27, 2026 Company name: Adbiotech Co., Ltd. CEO: Kim Do-hyeong Head office address: 39 Geodu-danji 1-gil, Dongnae-myeon, Chuncheon-si, Gangwon State (Phone) 070-4193-4006 (Website) http://www.adbiotech.com Preparer: (Title) Managing Director (Name) Choi Gyeong-min (Phone) 070-4193-4006

Decision to Sell Own Convertible Bonds

1. Type of bond: Series 7, unregistered unsecured private-placement convertible bonds 2. Bond issuance date: 2025.07.03 3. Bond issuance method: Private placement 4. Bond maturity date: 2030.07.03 5. Total face (electronically registered) value of the bonds (KRW): 8,000,000,000 6. Details of early acquisition of the bonds to be sold: face (electronically registered) value of bonds to be sold (KRW): 3,000,000,000; acquisition amount (KRW): 3,115,397,260; reason for acquisition: separate agreement with the bondholder 7. Sale decision date: 2026.03.27 8. Sale amount: KRW 3,300,000,000; basis for determination: determined through mutual negotiation with the buyer, taking into account the bond's interest rate and share price conditions, etc. 9. Sale proceeds receipt (expected) date: 2026.09.03 10. Purpose of sale: Securing working capital and improving the financial structure 11. Matters related to conversion: conversion ratio 100%; conversion price as of the report date (KRW/share): 1,797; type of shares to be issued upon conversion: Adbiotech Co., Ltd. registered common shares; number of shares: 1,669,449; ratio to total shares outstanding: 7.82%; conversion request period: start date 2026.07.03; end date 2030.06.03 12. Whether subject to Fair Trade Commission reporting: Not applicable 13. Other matters material to investment decisions 1) The above "7. Sale decision date" is the board resolution date. 2) The above "9. Sale proceeds receipt (expected) date" is the balance payment date; details are as follows: - Down payment 2026.03.27, KRW 165,000,000 / Balance 2026.09.03, KRW 3,135,000,000 3) The above "11. Matters related to conversion - conversion price as of the report date (KRW/share)" reflects adjustments from the original conversion price following rights offerings paid in on November 19, 2025 and January 13, 2026. 4) The above "11. Matters related to conversion - ratio to total shares outstanding of shares to be issued upon conversion (%)" was calculated as [voting shares to be issued / (total voting shares outstanding as of the acquisition date + voting shares to be issued)]. 5) Matters related to the early redemption request right (put option) The bondholder of these bonds may request early redemption before maturity, for all or part of the electronically registered amount of these bonds, on July 3, 2026 (the date one year after the issuance date of these bonds) and on each date falling every three months thereafter (the "early redemption payment date"). However, if the early redemption payment date is not a business day, the following business day shall be the early redemption payment date, and no interest shall accrue after the original early redemption payment date.

(1) Early redemption payment dates and claim amounts: 2026-07-03: 103.00% of the electronically registered amount 2026-10-03: 103.77% of the electronically registered amount 2027-01-03: 104.55% of the electronically registered amount 2027-04-03: 105.31% of the electronically registered amount 2027-07-03: 106.09% of the electronically registered amount 2027-10-03: 106.88% of the electronically registered amount 2028-01-03: 107.68% of the electronically registered amount 2028-04-03: 108.47% of the electronically registered amount 2028-07-03: 109.27% of the electronically registered amount 2028-10-03: 110.09% of the electronically registered amount 2029-01-03: 110.91% of the electronically registered amount 2029-04-03: 111.72% of the electronically registered amount 2029-07-03: 112.55% of the electronically registered amount 2029-10-03: 113.39% of the electronically registered amount 2030-01-03: 114.24% of the electronically registered amount 2030-04-03: 115.08% of the electronically registered amount

(2) Early redemption rate and request period: the bondholder must submit the early redemption request to the issuer from 60 days before to 30 days before the early redemption payment date (the "early redemption request period"). However, if the end date of the request period is not a business day, it is extended to the following business day.

Early redemption schedule (request period / payment date / rate): 1st: from 2026-05-04 to 2026-06-03; payment date 2026-07-03; rate 103.00% 2nd: from 2026-08-04 to 2026-09-03; payment date 2026-10-03; rate 103.77% 3rd: from 2026-11-04 to 2026-12-04; payment date 2027-01-03; rate 104.55% 4th: from 2027-02-02 to 2027-03-04; payment date 2027-04-03; rate 105.31% 5th: from 2027-05-04 to 2027-06-03; payment date 2027-07-03; rate 106.09% 6th: from 2027-08-04 to 2027-09-03; payment date 2027-10-03; rate 106.88% 7th: from 2027-11-04 to 2027-12-04; payment date 2028-01-03; rate 107.68% 8th: from 2028-02-03 to 2028-03-04; payment date 2028-04-03; rate 108.47% 9th: from 2028-05-04 to 2028-06-03; payment date 2028-07-03; rate 109.27% 10th: from 2028-08-04 to 2028-09-03; payment date 2028-10-03; rate 110.09% 11th: from 2028-11-04 to 2028-12-04; payment date 2029-01-03; rate 110.91% 12th: from 2029-02-02 to 2029-03-04; payment date 2029-04-03; rate 111.72% 13th: from 2029-05-04 to 2029-06-03; payment date 2029-07-03; rate 112.55% 14th: from 2029-08-04 to 2029-09-03; payment date 2029-10-03; rate 113.39% 15th: from 2029-11-04 to 2029-12-04; payment date 2030-01-03; rate 114.24% 16th: from 2030-02-02 to 2030-03-04; payment date 2030-04-03; rate 115.08%

(3) Early redemption request location: the issuer's head office (4) Early redemption payment location: Industrial Bank of Korea, Chuncheon Branch (5) Early redemption request procedure: a bondholder wishing to exercise the early redemption request right requests early redemption from the Korea Securities Depository through the account management institution if the bonds are electronically registered in the bondholder's customer account, or directly from the Korea Securities Depository if electronically registered in the bondholder's own account at the Depository; the Korea Securities Depository then consolidates such requests and submits the early redemption request to the request location.

[Matters Related to the Buyers] K-Polaris Investment Partnership: relationship to the company or largest shareholder -; selection process: selected considering the investor's payment capacity and timing, etc., to raise funds needed for company management; transactions within 6 months before/after the sale decision -; face value of bonds purchased (KRW): 3,000,000,000; note -

[Where the Buyer Includes a Corporation or Organization] (1) Basic information on the corporation or organization K-Polaris Investment Partnership: number of investors 4; representative (managing partner): Seong Jae-ik, 25%; operator (managing partner): -; largest shareholder (largest investor): Seong Jae-ik, 25% (2) Key financial information for the most recent fiscal year (Unit: KRW million) Fiscal year: December 2025; total assets -; revenue -; total liabilities -; net income -; total equity -; external auditor -; paid-in capital -; audit opinion -