JK Synapse

060230 · KOSDAQ · Materials · SMALL CAP

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

JK Synapse amended a March 2025 report on its decision to sell its own 25th series convertible bonds, reducing the face amount sold to new buyers from US$2.89M to US$2.78M (sale amount correspondingly reduced to US$2.78M), pushing back the proceeds receipt date to September 30, 2026, and adjusting the conversion price to US$1.02 per share after subsequent conversion-price resets.

Capital raise([Amended] Material event report (decision to sell own convertible bonds))· FILED 2026-08-26· RCEPT 20260826000620

What happened

AMENDMENT (August 26, 2026) 1. Disclosure document subject to amendment: Material event report (decision to sell own convertible bonds) 2. Original submission date of the disclosure document subject to amendment: 2025-03-13 3. Amended items Item: 6. Face (electronically registered) amount of the bond sold, pre-maturity acquisition details Reason for amendment: Reflects convertible-bond trading activity Before amendment: 5,536,000,000 After amendment: 4,636,000,000

Item: 6. Acquisition amount for the bond sold, pre-maturity acquisition details Reason for amendment: Reflects convertible-bond trading activity Before amendment: 7,887,508,090 After amendment: 6,957,755,890

Item: 8. Sale amount (KRW) Reason for amendment: Change in sale amount due to change of buyer Before amendment: 4,400,000,000 After amendment: 3,850,000,000

Item: 9. (Expected) date of receiving sale proceeds Reason for amendment: Change in (expected) date of receiving sale proceeds Before amendment: 2026-08-26 After amendment: 2026-09-30

Item: 11. Matters concerning conversion - conversion price as of the report date (KRW/share) Reason for amendment: Reflects conversion-price adjustment Before amendment: 1,910 After amendment: 1,405

Item: 11. Matters concerning conversion - number of shares to be issued upon conversion Reason for amendment: Reflects conversion-price adjustment Before amendment: 2,094,240 After amendment: 2,491,103

Item: 11. Matters concerning conversion - as % of total shares to be issued upon conversion Reason for amendment: Reflects the increase in share count from conversion-right exercise and the share consolidation (KRW 100 -> KRW 500) Before amendment: 15.68 After amendment: 11.30

Item: 11. Matters concerning conversion - conversion request period end date Reason for amendment: Change in conversion request period end date due to extension of maturity date Before amendment: 2026-08-13 After amendment: 2027-08-13

Item: 13. Other matters for investment reference Reason for amendment: Change of buyer, change in (expected) date of receiving sale proceeds, and reflecting the increase in share count from conversion-right exercise and the share consolidation (KRW 100 -> KRW 500)

13. Other matters for investment reference (after amendment) 1) Sale history of the 25th series convertible bonds Series: 25th series CB 2024.09.30, buyer AI Innovation Growth Fund No.1, face amount 500,000,000, resale amount 500,000,000 2024.10.11, buyer AI Innovation Growth Fund No.1, face amount 250,000,000, resale amount 250,000,000 2024.10.14, buyer AI Innovation Growth Fund No.1, face amount 100,000,000, resale amount 100,000,000 2024.10.17, buyer Park Se-ri, face amount 300,000,000, resale amount 300,000,000 2024.10.18, buyer AI Innovation Growth Fund No.1, face amount 350,000,000, resale amount 350,000,000 2024.12.24, buyer Wang Tae-wook, face amount 200,000,000, resale amount 200,000,000 2024.12.24, buyer Jeong Jeong-hee, face amount 50,000,000, resale amount 50,000,000 2024.12.24, buyer Park Mi-kyung, face amount 50,000,000, resale amount 50,000,000 2025.02.13, buyer Team Planning Co., Ltd., face amount 1,500,000,000, resale amount 1,500,000,000 2025.02.13, buyer Human Hills Company Co., Ltd., face amount 1,500,000,000, resale amount 1,500,000,000 2025.02.14, buyer Team Planning Co., Ltd., face amount 200,000,000, resale amount 200,000,000 2025.02.14, buyer LIUYUN, face amount 150,000,000, resale amount 150,000,000 2025.02.17, buyer Team Planning Co., Ltd., face amount 1,000,000,000, resale amount 1,000,000,000 2025.02.17, buyer Human Hills Company Co., Ltd., face amount 1,000,000,000, resale amount 1,000,000,000 2025.02.17, buyer Ambition Co., Ltd., face amount 2,500,000,000, resale amount 2,500,000,000 2025.02.18, buyer Shin Seung-su, face amount 300,000,000, resale amount 300,000,000 2025.02.19, buyer K Investment Association, face amount 314,000,000, resale amount 314,701,260 2025.02.21, buyer Kim Seong-wook, face amount 2,500,000,000, resale amount 2,500,000,000 2025.02.21, buyer Shin Seung-su, face amount 100,000,000, resale amount 100,000,000 2025.03.10, buyer Jeong Ju-hyeon, face amount 1,600,000,000, resale amount 1,600,000,000 2025.03.10, buyer Lee Chang-woo, face amount 1,000,000,000, resale amount 1,000,000,000 2026.08.11, buyer Kim Gi-woon and 1 other, face amount 900,000,000, resale amount 929,752,200 2026.03.27 (expected completion 2026.09.30), buyer Kim Do-yeon and 3 others, face amount 3,500,000,000, resale amount 3,850,000,000 Total: face amount 19,864,000,000, resale amount 20,244,453,460

4) In "11. Matters concerning conversion" above, the "conversion price as of the report date (KRW/share)," "number of shares to be issued upon conversion" and "as % of total shares" were prepared reflecting the share consolidation (KRW 100 -> KRW 500) effective June 23, 2026, the conversion-price adjustment from payment for the third-party allotment rights offering on July 28, 2026, and the conversion-price adjustment from the share-price increase on August 13, 2026. 5) In "11. Matters concerning conversion" above, the "as % of total shares" is based on total shares including the 14,359,271 shares currently listed plus 3,099,173 shares from conversion-right exercise on August 10, 2026 and 2,086,774 shares from conversion-right exercise on August 11, 2026.

[Matters concerning the buyer] (after amendment) Buyer name: Kim Do-yeon. Relationship with Company or largest shareholder: -. Selection process: selected considering investor intent, payment capacity and timing, etc., to achieve the Company's management objectives and promptly raise necessary funds. Transactions/plans within 6 months before/after the sale decision: -. Face amount of bonds purchased (KRW): 900,000,000. Remarks: - Buyer name: Lee Cha-yoon. Same selection-process description. Face amount purchased: 900,000,000. Remarks: - Buyer name: Han Tae-seon. Same. Face amount purchased: 900,000,000. Remarks: - Buyer name: Kim Gyu-han. Same. Transactions/plans: 2026.03.25, acquired KRW 250 million face amount of 27th series CB. Face amount purchased: 800,000,000. Remarks: -

13. Other matters for investment reference (before amendment) 1) Sale history of the 25th series convertible bonds [Same rows as above through 2025.03.10 Lee Chang-woo, face amount 1,000,000,000, resale amount 1,000,000,000, then:] 2026.03.27 (expected completion 2026.08.26), buyer Bae Jin-han and 5 others, face amount 4,000,000,000, resale amount 4,400,000,000 Total: face amount 19,464,000,000, resale amount 19,864,701,260

4) In "11. Matters concerning conversion" above, the "conversion price as of the report date (KRW/share)," "number of shares to be issued upon conversion" and "as % of total shares" were prepared reflecting the number of shares resulting from the share consolidation (KRW 100 -> KRW 500) effective June 23, 2026.

[Matters concerning the buyer] (before amendment) Buyer name: Bae Jin-han. Relationship with Company or largest shareholder: -. Selection process: selected considering investor intent, payment capacity and timing, etc. Transactions/plans within 6 months before/after the sale decision: -. Face amount purchased: 500,000,000. Remarks: - Buyer name: Kim Do-yeon. Same. Face amount purchased: 900,000,000. Remarks: - Buyer name: Lee Cha-yoon. Same. Face amount purchased: 900,000,000. Remarks: - Buyer name: Lee Seong-ho. Same. Face amount purchased: 400,000,000. Remarks: - Buyer name: Han Tae-seon. Same. Face amount purchased: 900,000,000. Remarks: - Buyer name: Kim Gyu-han. Same. Transactions/plans: 2026.03.25, acquired KRW 250 million face amount of 27th series CB. Face amount purchased: 400,000,000. Remarks: -

Material event report / Exchange reporting obligation matter To the Financial Services Commission / Korea Exchange March 12, 2025 Company name: JK Synapse Co., Ltd. CEO: Park Jun-young Head office address: 50 2-gongdan 7-gil, Cha-am-dong, Seobuk-gu, Cheonan-si, Chungcheongnam-do Phone: 041-410-7777 Website: http://www.sonid.co.kr Preparer: Park Jun-young, CEO, Phone 041-410-7777

Decision to sell own convertible bonds

1. Type of bond Series: 25 Type: Unregistered, interest-bearing, unsecured, privately placed convertible bonds

2. Bond issue date: 2023-09-13 3. Bond issuance method: Private placement 4. Bond maturity date: 2026-09-13 5. Total face (electronically registered) amount of the bond (KRW): 20,000,000,000

6. Pre-maturity acquisition details of the bond to be sold Face (electronically registered) amount of the bond to be sold (KRW): 4,636,000,000 Acquisition amount (KRW): 6,957,755,890 Reason for acquisition: Early redemption by mutual agreement with the underwriter, etc.

7. Sale decision date: 2025-03-12 8. Sale amount Amount (KRW): 3,850,000,000 Basis of calculation: Determined through negotiation with the buyer considering the current share-price situation and conversion requests on the convertible bonds, etc.

9. (Expected) date of receiving sale proceeds: 2026-09-30 10. Purpose of sale: Securing working capital

11. Matters concerning conversion Conversion ratio (%): 100 Conversion price as of the report date (KRW/share): 1,405 Type of shares to be issued upon conversion: JK Synapse Co., Ltd. registered common shares Number of shares: 2,491,103 As % of total shares: 11.30 Conversion request period: start 2024-09-13, end 2027-08-13

12. Subject to Fair Trade Commission reporting: Not applicable

13. Other matters for investment reference 1) Sale history of the 25th series convertible bonds: [as set out in the "after amendment" table above, with the same rows, ending in the 2026.08.11 and 2026.03.27 entries and total face amount 19,864,000,000 / resale amount 20,244,453,460]

2) Pre-maturity acquisition history of the 25th series convertible bonds Series: 25th series CB 2024.09.25: 1,500,000,000 2024.12.06: 1,500,000,000 2025.01.06: 500,000,000 2025.01.24: 8,000,000,000 2025.02.13: 8,500,000,000 2025.04.08: 350,000,000 2025.06.27: 250,000,000 2025.07.31: 50,000,000 2025.12.05: 350,000,000 Total: 21,000,000,000

3) Registration cancellation history of the 25th series convertible bonds Series: 25th series CB 2024.12.24: 300,000,000 2025.03.13: 100,000,000 2025.06.13: 195,000,000 2025.08.13: 50,000,000 Total: 645,000,000

4) In "11. Matters concerning conversion" above, the "conversion price as of the report date (KRW/share)," "number of shares to be issued upon conversion" and "as % of total shares" were prepared reflecting the share consolidation (KRW 100 -> KRW 500) effective June 23, 2026, the conversion-price adjustment from payment for the third-party allotment rights offering on July 28, 2026, and the conversion-price adjustment from the share-price increase on August 13, 2026. 5) In "11. Matters concerning conversion" above, the "as % of total shares" is based on total shares including the 14,359,271 shares currently listed plus 3,099,173 shares from conversion-right exercise on August 10, 2026 and 2,086,774 shares from conversion-right exercise on August 11, 2026.

[Matters concerning the buyer] Buyer name: Kim Do-yeon. Relationship with Company or largest shareholder: -. Selection process: selected considering investor intent, payment capacity and timing, etc. Transactions/plans within 6 months before/after the sale decision: -. Face amount purchased: 900,000,000. Remarks: - Buyer name: Lee Cha-yoon. Same. Face amount purchased: 900,000,000. Remarks: - Buyer name: Han Tae-seon. Same. Face amount purchased: 900,000,000. Remarks: - Buyer name: Kim Gyu-han. Same. Transactions/plans: 2026.03.25, acquired KRW 250 million face amount of 27th series CB. Face amount purchased: 800,000,000. Remarks: -

Filed2026-08-26, [Amended] Material event report (decision to sell own convertible bonds)
SourceDART rcept 20260826000620 → open original filing

Source: DART. Information only, not investment advice.

For informational purposes only. This is not investment advice, a recommendation, or a solicitation to buy or sell any security. Do your own research; any investment decision is your own responsibility.

Data from DART, Korea's official corporate-filing system. Data sourced from official DART filings. Accuracy is not guaranteed. Figures are as of the date shown. As of 2026-08-26 (KST). · Converted at 1 USD ≈ ₩1,325 (rate of 2026-10-21).