Rights offering: new share issue price (notice)

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SK D&D / Rights Offering: New Share Issue Price (Notice) / (2026.08.31) Rights Offering: New Share Issue Price (Notice)

Rights Offering: New Share Issue Price (Notice)

1. Classification: New share issue price as of the new-share allotment record date

2. Issue price per share Common shares (KRW): 2,260 Preferred/other class shares (KRW): -

3. Other important matters relevant to investment decisions * The issue price per share in this notice is the first issue price; the final issue price will be disclosed on October 7, 2026 according to the formula below.

[Method of determining the issue price] (1) First issue price: The first issue price is determined by taking the lower of (i) the arithmetic average of the one-month volume-weighted average price, the one-week volume-weighted average price, and the closing price as of the base date, the 3rd trading day before the new-share allotment record date (August 28, 2026), and (ii) the closing price as of that base date, as the reference price; applying a 20% discount rate to the reference price; and computing the capital-increase ratio as (number of rights-offering shares / total shares issued), under the formula below. Amounts below the quotation unit are rounded up to the nearest quotation unit, and if the resulting price is at or below par value, the par value is used as the issue price. * First issue price = [reference price x (1 - discount rate)] / [1 + (capital-increase ratio x discount rate)]

(2) Second issue price: The second issue price is determined by taking the lower of (i) the arithmetic average of the one-week volume-weighted average price and the closing price as of the base date, the 3rd trading day before the start of the existing-shareholder subscription period (October 6, 2026), and (ii) the closing price as of that base date, as the second reference price, under the formula below, applying a 20% discount rate. Amounts below the quotation unit are rounded up to the nearest quotation unit, and if the resulting price is at or below par value, the par value is used as the issue price. * Second issue price = reference price x (1 - discount rate)

(3) Final issue price: The final issue price is the lower of the first issue price and the second 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 below the price calculated by applying a 40% discount rate to the volume-weighted average price from the 3rd to the 5th trading day before the subscription date, then the volume-weighted average price from the 3rd to the 5th trading day before the subscription date, discounted by 40% (as stated in the filing; the source text ends here).

* Related disclosures 2026-07-28 Rights Offering Decision 2026-07-28 Securities Registration Statement (Equity Securities) 2026-08-10 Securities Registration Statement (Equity Securities) 2026-08-18 Securities Registration Statement (Equity Securities) 2026-08-28 Prospectus