Completion report on merger, etc. (merger)

What happened

Completion Report on Merger, etc. (Merger), Form 6.0 Device Co., Ltd. To: Governor of the Financial Supervisory Service July 31, 2026 Company name: Device Co., Ltd. Representative Directors: Choi Bong-jin, Bang In-ho Head office address: 39 Seokmun-gil, Seonggeo-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do Phone: 041-629-5200 Website: http://www.deviceeng.co.kr Preparer: (Title) Managing Director; (Name) Lee Seong-jin; (Phone) 041-629-5227

I. Schedule Merger board resolution date: May 18, 2026; - Announcement of record date for determining shareholders: May 18, 2026; announced on company website Material event report filing: May 18, 2026; - Merger contract date: May 21, 2026; - Record date for determining shareholders: June 2, 2026; - Small-scale merger announcement: June 2, 2026; announced on company website Period for receiving merger-objection notices: start date June 2, 2026; end date June 17, 2026; - Board resolution date approving the merger: June 19, 2026; in lieu of general meeting Creditor objection announcement: June 19, 2026; announced on company website Creditor objection period: start date June 19, 2026; end date July 20, 2026; - Merger effective date: July 31, 2026; - Board resolution date for merger completion report: July 31, 2026; in lieu of general meeting Merger completion report announcement: July 31, 2026; announced on company website Scheduled merger (dissolution) registration date: August 4, 2026; -

Note 1: Because this merger follows the small-scale merger method under Article 527-3 of the Commercial Act, appraisal rights are not granted, and the shareholders' meeting for merger approval was replaced by board approval. Note 2: The completion report for this merger was replaced, under Article 526, Paragraph 3 of the Commercial Act, by a board resolution and website announcement.

II. Changes in Major Shareholder Equity - Device Co., Ltd. holds 100% of the shares of Oclen Ventures Co., Ltd.; because the merger is a no-capital-increase merger with a ratio of 1:0 issuing no merger new shares, there is no change in the equity of the largest shareholder, etc. after the merger.

III. Exercise of Appraisal Rights - Because this merger constitutes a small-scale merger under Article 527-3 of the Commercial Act, appraisal rights are not granted pursuant to Article 527-3, Paragraph 5 of the Act. - Pursuant to Article 527-3, Paragraph 4 of the Commercial Act, notices of objection to the small-scale merger were accepted from June 2, 2026 to June 17, 2026; a total of 155 shareholders submitted notices of objection to the merger, representing a total of 34,633 shares, equivalent to 0.25% of total shares issued.

IV. Creditor Protection - The surviving company, Device Co., Ltd., and the dissolving company, Oclen Ventures Co., Ltd., each issued a creditor-objection announcement on June 19, 2026; no creditor submitted an objection during the creditor-objection period (June 19, 2026 to July 20, 2026). No decision has been made to repay debts or provide substantial collateral in connection with this matter.

V. Status of Related Litigation - As of the date of this report, no lawsuit has been filed that could affect the validity of this merger.

VI. Matters Concerning New Share Allotment, etc. - Device Co., Ltd. holds 100% of the equity of Oclen Ventures Co., Ltd.; because the merger proceeds as a no-capital-increase merger with a ratio of 1:0 issuing no merger new shares, this item is not applicable.

VII. Summary Financial Information Before and After [Merger, etc.] (as of March 31, 2026) (unit: KRW million) Category: Before merger (Note 1) - Device Co., Ltd. / Oclen Ventures Co., Ltd.; After merger (estimated) (Note 2) - Device Co., Ltd. Current assets: 118,691 / 2,308 / 120,998 Non-current assets: 105,186 / 2,579 / 103,626 Total assets: 223,876 / 4,887 / 224,624 Current liabilities: 36,204 / 18 / 36,222 Non-current liabilities: 20,542 / - / 20,542 Total liabilities: 56,746 / 18 / 56,765 Capital stock: 3,518 / 5,000 / 3,518 Total equity: 167,130 / 4,869 / 167,860 Total liabilities and equity: 223,876 / 4,887 / 224,624

Note 1: The above summary statement of financial position is based on the separate (non-consolidated) statement of financial position as of March 31, 2026, the most recent financial statements available at the filing date of this completion report, and may differ from the statement of financial position as of the actual merger effective date (July 31, 2026). Note 2: The above post-merger financial statements have not been audited or reviewed by an external auditor and may change based on the external auditor's audit or review results.