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

What happened

Material Event Report (Decision to Sell Own Convertible Bonds), Form 6.0 Sonid Co., Ltd., Amendment Report July 31, 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 13, 2025 3. Amendment details Item 9 (Scheduled date of receipt of sale proceeds): Reason for amendment - change in scheduled receipt date; Before amendment: 2026-07-31; After amendment: 2026-09-11 Item 11 (Conversion price per share (KRW) as of report date): Reason for amendment - reflects conversion price adjustment from a share consolidation (par value KRW 100 -> KRW 500) and a third-party allotment rights offering; Before amendment: KRW 382; After amendment: KRW 968 Item 11 (Shares to be issued upon conversion - number of shares / ratio to total shares (%)): Reason for amendment - reflects decrease in shares to be issued from the share consolidation (KRW 100 -> KRW 500) and increase in shares to be issued plus conversion-price adjustment from the third-party allotment rights offering; Before amendment: 9,947,643 shares / 18.16%; After amendment: 3,925,619 shares / 27.34% Item 13 (Other matters for investment reference): Reason for amendment - change of buyer and change in scheduled receipt date of sale proceeds; reflects total shares issued from the rights offering (as stated in the filing)

[Note 1: Before amendment, Item 13. Other matters for investment reference] 1) Sale history of the 27th-round convertible bonds 2024-10-18: Buyer AI Innovation Growth No.1 Partnership; face value KRW 1,150,000,000; resale amount KRW 1,150,000,000 2024-10-28: Buyer AI Innovation Growth No.1 Partnership; face value KRW 100,000,000; resale amount KRW 100,000,000 2024-10-30: Buyer AI Innovation Growth No.1 Partnership; face value KRW 100,000,000; resale amount KRW 100,000,000 2024-12-16: Buyer Kim Jin-sung; face value KRW 50,000,000; resale amount KRW 50,000,000 2025-02-05: Buyer Yoo Jeong-hee; face value KRW 40,000,000; resale amount KRW 40,000,000 2025-02-28: Buyer YP Investment Partnership; face value KRW 200,000,000; resale amount KRW 200,000,000 2025-02-28: Buyer Rin Ventures Co., Ltd.; face value KRW 500,000,000; resale amount KRW 500,000,000 2025-03-10: Buyer Jeong Ju-hyun; face value KRW 900,000,000; resale amount KRW 900,000,000 2025-05-30: Buyer Lee Chang-woo (deposited with court); face value KRW 1,000,000,000; resale amount KRW 1,000,000,000 2026-03-25: Buyer Kim Gyu-han and 8 others; face value KRW 2,280,000,000; resale amount KRW 2,508,000,000 2026-04-23 (scheduled completion 2026-07-31): Buyer J&G Partners Co., Ltd.; face value KRW 3,600,000,000; resale amount KRW 3,961,112,400 2026-04-23 (scheduled completion 2026-07-31): Buyer Kim Ji-young; face value KRW 200,000,000; resale amount KRW 220,061,800 Total: face value KRW 11,320,000,000; resale amount KRW 12,169,174,200 3) Not stated.

[Buyer information] J&G Partners Co., Ltd.: Relationship to company/largest shareholder -; Basis for selection: selected considering investor willingness, payment capacity, and timing to achieve the company's business objectives and swiftly raise funds; transactions/plans within 6 months -; Face value of bonds purchased KRW 3,600,000,000; Note - Kim Ji-young: Relationship -; Basis for selection: same as above; transactions/plans -; Face value purchased KRW 200,000,000; Note -

[If the buyer includes a corporation or organization] (1) J&G Partners Co., Ltd.: Number of investors 2; Representative director Jeong Young-hee 96.7%; Managing partner -; Largest shareholder Jeong Young-hee 96.7% (2) Key financial information (unit: KRW million): fiscal year -, year-end -, total assets -, revenue -, total liabilities -, net income -, total equity -, external auditor -, capital stock -, audit opinion -. Note: not disclosed because the entity was established in 2025.

[Note 1: After amendment, Item 13. Other matters for investment reference] 1) Sale history of the 27th-round convertible bonds (same as above except the final two rows, below) 2026-07-31 (scheduled completion 2026-09-11): Buyer J&G Partners Co., Ltd.; face value KRW 3,600,000,000; resale amount KRW 3,961,112,400 2026-07-31 (scheduled completion 2026-09-11): Buyer Victoria No.1 Investment Partnership; face value KRW 200,000,000; resale amount KRW 220,061,800 Total: face value KRW 11,320,000,000; resale amount KRW 12,169,174,200 3) The "ratio to total shares (%)" in "11. Matters concerning conversion" above reflects the currently listed 11,260,098 shares outstanding plus the 3,099,173 new shares issued through the third-party allotment rights offering paid in on July 28, 2026.

[Buyer information] J&G Partners Co., Ltd.: same as above; Face value purchased KRW 3,600,000,000 Victoria No.1 Investment Partnership: Relationship -; Basis for selection: same as above; transactions/plans -; Face value purchased KRW 200,000,000; Note -

[If the buyer includes a corporation or organization] (1) J&G Partners Co., Ltd.: same as above. (2) J&G Partners Co., Ltd. financial information: same as above (not disclosed, established 2025). (1) Victoria No.1 Investment Partnership: Number of investors 2; Representative partner Oh Se-yun 50%; Managing partner Oh Se-yun 50%; Largest contributors Oh Se-yun 50% and Jeong Hyun-cheol 50%. (2) Key financial information (unit: KRW million): not disclosed because the partnership was established in 2026.

Material Event Report / Exchange Reporting Obligation To: Financial Services Commission / Korea Exchange March 12, 2025 Company name: Sonid Co., Ltd. Representative Director: Park Jun-young Head office address: 50 2-gongdan 7-gil, Seobuk-gu, Cheonan-si, Chungcheongnam-do (Chaam-dong) Phone: 041-410-7777 Website: http://www.sonid.co.kr Preparer: (Title) Representative Director; (Name) Park Jun-young; (Phone) 041-410-7777

Decision to Sell Own Convertible Bonds 1. Type of bonds: Round 27; Type: Unregistered, interest-bearing, unsecured, privately placed convertible bonds 2. Bond issuance date: September 13, 2023 3. Bond issuance method: Private placement 4. Bond maturity date: September 13, 2026 5. Total face value of bonds (electronically registered) (KRW): 10,000,000,000 6. Early acquisition of bonds subject to sale: Face value subject to sale (KRW) 4,070,000,000; Acquisition amount (KRW) 4,564,936,678; Reason for acquisition: early redemption, etc. by mutual agreement with the underwriter 7. Sale decision date: March 12, 2025 8. Sale amount: KRW 4,181,174,200; Basis of calculation: determined through negotiation with the buyer considering the current share price and likelihood of conversion requests or early redemption 9. Scheduled date of receipt of sale proceeds: September 11, 2026 10. Purpose of sale: securing working capital 11. Matters concerning conversion: conversion ratio 100%; conversion price per share as of report date KRW 968; shares to be issued upon conversion: JK Synapse Co., Ltd. registered common shares; number of shares 3,925,619; ratio to total shares 27.34%; conversion request period September 13, 2024 to August 13, 2026 12. Subject to Fair Trade Commission reporting: Not applicable 13. Other matters for investment reference 1) Sale history of the 27th-round convertible bonds: same final table as the "after amendment" section above (total face value KRW 11,320,000,000; total resale amount KRW 12,169,174,200) 2) Early acquisition history of the 27th-round convertible bonds 2024-09-30: KRW 5,000,000,000 2024-12-31: KRW 200,000,000 2025-01-24: KRW 1,500,000,000 2025-02-13: KRW 1,000,000,000 2025-03-10: KRW 200,000,000 2025-04-08: KRW 1,150,000,000 2025-04-25: KRW 40,000,000 2025-05-22: KRW 700,000,000 2025-07-30: KRW 1,100,000,000 2025-09-30: KRW 700,000,000 Total: KRW 11,590,000,000 3) The "ratio to total shares (%)" above reflects the currently listed 11,260,098 shares outstanding plus the 3,099,173 new shares issued through the third-party allotment rights offering paid in on July 28, 2026.

[Buyer information - same as the "after amendment" table above] [If the buyer includes a corporation or organization - same two entities, J&G Partners Co., Ltd. and Victoria No.1 Investment Partnership, as described above]