[Amended] Material event report (rights offering)

A later amendment corrects this filing, so the terms on this page may be out of date. See the latest version (2026-09-30) →

What happened

Material Event Report (Rights Offering Decision) 6.3 HanWool Semiconductor Co., Ltd. Amendment report (notification), 2026-07-16 1. Disclosure document being amended: Material event report (rights offering decision) 2. Original filing date of the disclosure document being amended: 2026-04-15 3. Amended items Item: Reason for amendment; Before amendment; After amendment 1. Type and number of new shares - Common shares (shares): Amendment due to a change in the rights offering issuance schedule and purpose of use of funds; Before: 4,700,000; After: 3,800,000 2. Total shares issued before the capital increase (shares) - Common shares: Before: 6,668,810; After: 6,734,940 4. Purpose of capital raising - Working capital (KRW) / Debt repayment funds (KRW): Before: 14,865,500,000 / 8,000,000,000; After: 11,076,000,000 / 8,000,000,000 6. New share issue price - Expected issue price, common shares (KRW) / expected confirmation date: Before: 4,865 / 2026-08-31; After: 5,020 / 2026-09-07 8. New share allotment record date: Before: 2026-07-27; After: 2026-08-05 9. Number of new shares allotted per share: Before: 0.6980109213; After: 0.5643492555 11. Expected subscription date - existing shareholders, start/end date: Before: 2026-09-03 to 2026-09-04; After: 2026-09-10 to 2026-09-11 12. Payment date: Before: 2026-09-11; After: 2026-09-18 16. Expected listing date: Before: 2026-09-28; After: 2026-10-06 22. Short-sale-prohibited subscription period - end date: Before: 2026-08-31; After: 2026-09-07 24. Other matters for reference in investment decisions, b. Method of allotting new shares - allotment ratio: Before: 0.6980109213; After: 0.5643492555 24. Other matters for reference in investment decisions, c. Subscription handling locations: see Note 1 (before) / Note 2 (after) 24. Other matters for reference in investment decisions, d. Matters relating to preemptive rights, 3) expected listing period of preemptive rights certificates: Before: 2026-08-19 to 2026-08-25; After: 2026-08-26 to 2026-09-01

Note 1) Before amendment - subscription handling locations Existing shareholders (preemptive rights certificate holders), holders of special accounts (former "registered shareholders"): head office and branches of SK Securities Co., Ltd., 2026-09-03 to 2026-09-04 General shareholders (former "beneficial shareholders"): 1) the relevant securities firm's head office and branches holding the Company's shares in deposit as of the shareholder record date; 2) head office and branches of SK Securities Co., Ltd. General public offering subscription (including subscriptions by high-risk high-return investment trusts, etc. and venture company investment trusts): head office and branches of SK Securities Co., Ltd. and Sangsangin Securities Co., Ltd., 2026-09-08 to 2026-09-09

Note 2) After amendment - subscription handling locations Existing shareholders (preemptive rights certificate holders), holders of special accounts (former "registered shareholders"): head office and branches of SK Securities Co., Ltd., 2026-09-10 to 2026-09-11 General shareholders (former "beneficial shareholders"): 1) the relevant securities firm's head office and branches holding the Company's shares in deposit as of the shareholder record date; 2) head office and branches of SK Securities Co., Ltd. General public offering subscription (including subscriptions by high-risk high-return investment trusts, etc. and venture company investment trusts): head office and branches of SK Securities Co., Ltd. and Sangsangin Securities Co., Ltd., 2026-09-15 to 2026-09-16

Material Event Report / Matter Subject to KRX Reporting Obligation To the Financial Services Commission / Korea Exchange, 2026-04-15 Company name: HanWool Semiconductor Co., Ltd. CEO: Kim Baek-san Head office address: Unit 1001, Bldg. 104, 166 Gosan-ro, Dangjeong-dong, Gunpo-si, Gyeonggi-do (SK V1 Center) (Phone) 031-429-2401 (Website) http://www.hanwoolsemi.com Preparer: (Title) Executive Vice President (Name) Im Se-hyeok (Phone) 031-429-2401

Rights offering decision

1. Type and number of new shares: Common shares (shares) 3,800,000; Other shares (shares) -

2. Par value per share (KRW): 500

3. Total shares issued before the capital increase: Common shares (shares) 6,734,940; Other shares (shares) -

4. Purpose of capital raising Facility funds (KRW): - Funds for business acquisition (KRW): - Working capital (KRW): 11,076,000,000 Debt repayment funds (KRW): 8,000,000,000 Funds to acquire securities of other companies (KRW): - Other funds (KRW): -

5. Method of capital increase: Shareholder allotment followed by general public offering of forfeited shares * Matters relating to other shares: Articles of incorporation basis -; Terms of the shares -; Other -

6. New share issue price Confirmed issue price - common shares (KRW): -; other shares (KRW): - Expected issue price - common shares (KRW): 5,020; expected confirmation date: 2026-09-07; other shares (KRW): -; expected confirmation date: -

7. Method of determining the issue price: See "24. Other matters for reference in investment decisions, a. Method of determining the new share issue price" below

8. New share allotment record date: 2026-08-05

9. Number of new shares allotted per share: 0.5643492555

10. Preferential allotment ratio for employee stock ownership association members (%): -

11. Expected subscription date Employee stock ownership association - start date: -, end date: - Existing shareholders - start date: 2026-09-10, end date: 2026-09-11

12. Payment date: 2026-09-18

13. Treatment plan for forfeited shares: See "24. Other matters for reference in investment decisions, b. Method of allotting new shares" below

14. Dividend record start date for new shares: 2026-01-01

15. Expected date of delivery of new share certificates: -

16. Expected listing date of new shares: 2026-10-06

17. Lead manager (if not a direct offering): SK Securities Co., Ltd.

18. Whether preemptive rights are transferable: Yes - Whether preemptive rights certificates will be listed: Yes - Financial investment business entity handling trading and brokerage of preemptive rights certificates: SK Securities Co., Ltd.

19. Board of directors' resolution date (decision date): 2026-04-15 - Outside directors' attendance: Present (persons) 2; Absent (persons) 1 - Attendance of the auditor (audit committee member): Present

20. Whether a securities registration statement must be filed: Yes

21. If exempted from filing, the reason: -

22. Short-sale-prohibited subscription period: Applicable; Start date: 2026-04-16; End date: 2026-09-07

23. Whether subject to report to the Fair Trade Commission: Not applicable

24. Other matters for reference in investment decisions

a. Method of determining the new share issue price: Under Article 5-18 of the Regulation on Issuance and Disclosure of Securities, the issue price for a shareholder-allotted capital increase may in principle be freely determined following the abolition of the mandatory pricing procedure and the liberalization of price determination; however, to avoid market disruption and in line with existing practice, the Company will apply, by partial analogy, the method under Article 57 of the former Regulation on Issuance and Disclosure of Securities, calculated as described in "I. General Matters Concerning the Offering or Sale, 3. Method of Determining the Offering Price." - Basis for the expected issue price: The expected issue price in this securities registration statement is calculated using, as the reference share price, the lower of (i) the simple average of the one-month weighted average price, the one-week weighted average price, and the base-date weighted average price, each calculated by dividing the trading value by the trading volume on the KOSDAQ market, with the base date being the trading day immediately preceding the board resolution date (2026-04-14), and (ii) the base-date weighted average price, and then applying a 25% discount rate. However, if the offering price resulting from the discount is below par value, the par value shall be used as the issue price, and any amount below the minimum quotation unit shall be rounded up. Expected issue price = [Reference share price x (1 - discount rate)] / [1 + (capital increase ratio x discount rate)] - Basis for the confirmed issue price: 1) First issue price: Using as the reference share price the lower of (i) the simple average of the one-month weighted average price, the one-week weighted average price, and the base-date weighted average price, each weighted-averaged by trading volume on the KOSDAQ market, with the base date being the third trading day before the new share allotment record date, and (ii) the base-date weighted average price, determined by the formula below with a 25% discount rate applied (provided that any amount below the minimum quotation unit is rounded up to the minimum quotation unit, and if the resulting price is at or below par value, par value shall be used). First issue price = Reference share price x (1 - discount rate) / [1 + (capital increase ratio x discount rate)] 2) Second issue price: Using as the reference share price the lower of (i) the simple average of the one-week weighted average price and the base-date weighted average price, each weighted-averaged by trading volume on the KOSDAQ market, with the base date being the third trading day before the first day of the existing shareholders' subscription period, and (ii) the base-date weighted average price, determined by the formula below with a 25% discount rate applied (provided that any amount below the minimum quotation unit is rounded up to the minimum quotation unit, and if the resulting price is at or below par value, par value shall be used). Second issue price = Reference share price x (1 - discount rate) 3) Confirmed issue price: The lower of the first issue price and the second issue price is the confirmed issue price. However, pursuant to Article 165-6 of the Financial Investment Services and Capital Markets Act and Article 5-15-2 of the Regulation on Issuance and Disclosure of Securities, if the lower of the first and second issue prices is lower than the price calculated by applying a 40% discount rate to the weighted average price from the third to the fifth trading day before the subscription date, that latter price (the price calculated by applying a 40% discount rate to the weighted average price from the third to the fifth trading day before the subscription date) shall be the confirmed issue price (provided that any amount below the minimum quotation unit is rounded up to the minimum quotation unit, and if the resulting price is below par value, par value shall be used). Confirmed issue price = MAX[MIN(first issue price, second issue price), 60% of the reference share price] The final issue price will be determined on the third trading day before the first day of the existing shareholders' subscription period and disclosed on the Financial Supervisory Service's electronic disclosure system (DART), and will be announced on the Company's website (http://www.hanwoolsemi.com) in lieu of individual notice.

b. Method of allotting new shares (1) Subscription by existing shareholders (preemptive rights certificate holders): Shareholders registered in the shareholder register as of 18:00 on the "new share allotment record date" (the "existing shareholders") will be allotted shares calculated by multiplying their holdings by 0.5643492555 shares per share (with any fraction less than one share rounded down), and will be allotted the quantity subscribed within that allotment. However, the number of shares allotted per share may change due to the exercise of equity-linked bonds, changes in treasury shares, etc. before the new share allotment record date. (2) Oversubscription: If forfeited shares arise after the subscription by existing shareholders (preemptive rights certificate holders), such forfeited shares will be allotted in proportion to the number of shares oversubscribed by existing shareholders (preemptive rights certificate holders) (oversubscription ratio: 0.2 shares per allotted new share), with fractional shares of less than one share not allotted (provided that if the oversubscribed quantity is less than the forfeited shares, 100% is allotted). (i) Subscription limit shares = preemptive rights certificate subscription limit shares + oversubscription limit shares (ii) Preemptive rights certificate subscription limit shares = the quantity of preemptive rights certificates held (iii) Oversubscription limit shares = preemptive rights certificate subscription limit shares x oversubscription ratio (20%) (3) General public offering subscription: (i) Forfeited shares and fractional shares arising from the above subscription by existing shareholders and oversubscription (the "general public offering allotment") will be offered to the public by the "Lead Manager" and the "Underwriter" as follows: pursuant to Article 9, Paragraph 2, Item 6 of the Regulation on Securities Underwriting Business, 10% of the general public offering shares will be allotted to high-risk high-return investment trusts, etc., and 30% to venture company investment trusts. The remaining 60% will be allotted without distinction to individual subscribers and institutional investors (including collective investment business entities). However, if any group's subscription falls short, the shortfall shares will be allotted to the group(s) whose subscription exceeded its allotment. (ii) If the total number of shares subscribed in the general public offering exceeds the number of shares offered, shares will be allotted pro rata according to the subscription competition ratio, rounding under the standard rounding method, to minimize residual shares. However, the subscription competition ratios and allotments for the 10% offered to high-risk high-return investment trusts, etc., the 30% offered to venture company investment trusts, and the 60% offered to individual and institutional investors will each be calculated and allotted separately. However, if any group's subscription falls short, the shortfall shares will be allotted to the group(s) whose subscription exceeded its allotment. Any final residual shares will then be allotted sequentially beginning with the highest subscriber; where subscribers at the same rank exceed the final residual shares, the "Lead Manager" and the "Underwriter" will allot them at their reasonable discretion. (iii) If the total number of shares subscribed in the general public offering is less than the number of shares offered, shares will be allotted as subscribed, and any resulting residual shares will be underwritten by the "Lead Manager" and the "Underwriter" according to their respective underwriting obligation ratios. (iv) However, pursuant to Article 9, Paragraph 2 of the Regulation on Securities Underwriting Business, where the shares to be allotted to high-risk high-return investment trusts, etc., venture company investment trusts, or general subscribers would be 50,000 shares or less (based on a par value of KRW 500) or the offering amount of the shares to be allotted would be KRW 100 million or less, the "Lead Manager" and the "Underwriter" may decline to allot such shares to subscribers and instead underwrite them for their own account according to their respective underwriting obligation ratios.

c. Subscription handling locations Subscriber category: Subscription handling location; Subscription date Existing shareholders (preemptive rights certificate holders), holders of special accounts (former "registered shareholders"): head office and branches of SK Securities Co., Ltd.; 2026-09-10 to 2026-09-11 General shareholders (former "beneficial shareholders"): 1) the relevant securities firm's head office and branches holding the Company's shares in deposit as of the shareholder record date; 2) head office and branches of SK Securities Co., Ltd. General public offering subscription (including subscriptions by high-risk high-return investment trusts, etc. and venture company investment trusts): head office and branches of SK Securities Co., Ltd. and Sangsangin Securities Co., Ltd.; 2026-09-15 to 2026-09-16

d. Matters relating to preemptive rights 1) Pursuant to Article 165-6, Paragraph 3 of the Financial Investment Services and Capital Markets Act and Article 5-19 of the Regulation on Issuance and Disclosure of Securities, preemptive rights certificates will be issued to shareholders. 2) The preemptive rights certificates are expected to be listed on the Korea Exchange. 3) Expected listing period of the preemptive rights certificates: 2026-08-26 to 2026-09-01 4) In this rights offering, the preemptive rights certificates will be issued and listed after the effective date of the electronic securities system (2019-09-16) and will accordingly be issued as electronic securities. Preemptive rights certificates allotted in respect of shares a shareholder holds in a securities firm account (shares held by former "beneficial shareholders") will be issued and credited to that securities firm account, while preemptive rights certificates allotted in respect of shares managed in a special account at the transfer agent (shares held by former "registered shareholders") will be issued by owner in a special account at the transfer agent.

e. Other reference matters 1) This rights offering plan may change in the course of coordination with relevant authorities or the securities registration statement acceptance process. 2) Subscription deposits will be applied toward the share payment on the payment date, and no interest will accrue from the subscription date to the payment date. 3) Other matters not determined by the board of directors for the issuance of these new shares, and the execution of related agreements, ancillary matters, and the disbursement of related expenses, are delegated to the CEO.