Completion report on merger, etc. (asset transfer)

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Completion Report on Merger, Etc. (Asset Transfer) 6.0 Youngwire Co., Ltd. To the Governor of the Financial Supervisory Service September 4, 2026

Company name: Youngwire Co., Ltd. Representative Directors: Kang Geun-wook, Byun Tae-yong Head office address: 50 Gwanchang-gongdan-gil, Jugyo-myeon, Boryeong-si, Chungcheongnam-do (Phone) 041-939-3900 (Website) http://www.youngwire.com Preparer in charge: (Title) Executive Director (Name) Jang Su-eun (Phone) 02-2077-8500

I. Schedule This report is a completion report relating to the [Amended] material event report (decision on disposal of tangible assets) filed on August 28, 2026. This concerns a real estate sale and purchase agreement between the company (transferor) and Kumah Hydro Power Co., Ltd. (transferee); as of the reporting date, receipt of the balance and registration of the transfer of ownership have been completed, and this transaction is accordingly reported as concluded.

1. Asset transfer details and amount Asset type: Land Asset transferred: 71-1 Sinchon-dong, Seongsan-gu, Changwon-si, Gyeongsangnam-do Transferor: Youngwire Co., Ltd. Transferee: Kumah Hydro Power Co., Ltd. (KUMAHYDPOWER CO., LTD.) Transfer amount (KRW): 59,655,549,000 Note: The above transfer amount is based on book value; the actual transaction price is KRW 34,497,900,000.

2. Key progress schedule External valuation period: April 10, 2025 - April 15, 2025 (Gilin Accounting Corporation) Board resolution date: April 15, 2025 (material event report filed) Real estate sale and purchase agreement execution date: April 15, 2025 (initial contract) Down payment (10%) receipt date: April 15, 2025 Record date for determining shareholders for the extraordinary general meeting: April 30, 2026 Period for receiving notices of dissent to the tangible-asset disposal: May 15, 2025 - May 29, 2025 Extraordinary general meeting date: May 30, 2025 Appraisal rights exercise period: May 30, 2025 - June 19, 2025 Interim payment (10%) receipt date: June 5, 2025 Amended agreement and agreement extending the balance payment deadline: February 27, 2026 (extension of the balance payment deadline due to delays in administrative approval) Final amended agreement execution date: August 28, 2026 (fixing the lot number, area, and balance payment date based on the land survey results) Second interim payment (78%) receipt date: August 28, 2026 Asset transfer record date and expected registration date: September 4, 2026 (receipt of the 2% balance and registration of the transfer of ownership) Note: Because the land survey and land subdivision procedures for the transferred land were delayed beyond original expectations, the schedule for receiving the balance and transferring ownership changed; an amended agreement was executed reflecting the lot number and area as finalized by the land survey results.

II. Changes in Ownership of Major Shareholders, Etc. -- Not applicable

III. Exercise of Appraisal Rights 1. Purchase price and method of determination 1) Purchase price Purchase price: KRW 383 Basis of calculation: The price calculated under the price-determination method set out in Article 165-5 of the Financial Investment Services and Capital Markets Act and Article 176-7 of its Enforcement Decree Treatment if agreement on price is not reached: The price will be set based on the trading price of the relevant shares on the securities market pursuant to Article 165-5 of the Financial Investment Services and Capital Markets Act and Article 176-7 of its Enforcement Decree; a shareholder who disputes that price may petition the court to determine the purchase price. 2) Method of calculating the share purchase price Pursuant to Article 374-2 of the Commercial Act and Article 165-5 of the Financial Investment Services and Capital Markets Act, the purchase price for shares demanded to be purchased is calculated, under Article 176-7, Paragraph 3, Item 1 of the Enforcement Decree of the Financial Investment Services and Capital Markets Act, as the arithmetic average of (i) the volume-weighted arithmetic average of the daily closing prices quoted on the securities market over the past 2 months before the day preceding the board resolution on the tangible-asset disposal (or, if the ex-dividend or ex-rights date falls within that period and the period from the ex-dividend/ex-rights date to the day before the board resolution is 7 days or more, that period instead), (ii) the same average over the past 1 month, and (iii) the same average over the past 1 week.

Classification: (1) Volume-weighted average price over the past 2 months before the day preceding the board resolution; Amount (KRW): 392; Calculation period: February 17, 2025 - April 14, 2025 Classification: (2) Volume-weighted average price over the past 1 month before the day preceding the board resolution; Amount (KRW): 385; Calculation period: March 17, 2025 - April 14, 2025 Classification: (3) Volume-weighted average price over the past 1 week before the day preceding the board resolution; Amount (KRW): 373; Calculation period: April 8, 2025 - April 14, 2025 Base purchase price [((1)+(2)+(3))/3]: KRW 383

3) Calculation detail Date: 2025-04-14; Closing price: 393; Volume: 24,625; Closing price x volume: 9,677,625 Date: 2025-04-11; Closing price: 390; Volume: 92,232; Closing price x volume: 35,970,480 Date: 2025-04-10; Closing price: 375; Volume: 76,619; Closing price x volume: 28,732,125 Date: 2025-04-09; Closing price: 364; Volume: 49,414; Closing price x volume: 17,986,696 Date: 2025-04-08; Closing price: 364; Volume: 189,606; Closing price x volume: 69,016,584 Date: 2025-04-07; Closing price: 367; Volume: 134,146; Closing price x volume: 49,231,582 Date: 2025-04-04; Closing price: 381; Volume: 211,920; Closing price x volume: 80,741,520 Date: 2025-04-03; Closing price: 387; Volume: 93,320; Closing price x volume: 36,114,840 Date: 2025-04-02; Closing price: 389; Volume: 99,763; Closing price x volume: 38,807,807 Date: 2025-04-01; Closing price: 390; Volume: 214,193; Closing price x volume: 83,535,270 Date: 2025-03-31; Closing price: 391; Volume: 85,244; Closing price x volume: 33,330,404 Date: 2025-03-28; Closing price: 402; Volume: 90,393; Closing price x volume: 36,337,986 Date: 2025-03-27; Closing price: 404; Volume: 49,674; Closing price x volume: 20,068,296 Date: 2025-03-26; Closing price: 399; Volume: 48,219; Closing price x volume: 19,239,381 Date: 2025-03-25; Closing price: 400; Volume: 37,753; Closing price x volume: 15,101,200 Date: 2025-03-24; Closing price: 399; Volume: 22,692; Closing price x volume: 9,054,108 Date: 2025-03-21; Closing price: 398; Volume: 16,566; Closing price x volume: 6,593,268 Date: 2025-03-20; Closing price: 401; Volume: 23,013; Closing price x volume: 9,228,213 Date: 2025-03-19; Closing price: 399; Volume: 13,858; Closing price x volume: 5,529,342 Date: 2025-03-18; Closing price: 401; Volume: 35,974; Closing price x volume: 14,425,574 Date: 2025-03-17; Closing price: 398; Volume: 52,178; Closing price x volume: 20,766,844 Date: 2025-03-14; Closing price: 400; Volume: 20,850; Closing price x volume: 8,340,000 Date: 2025-03-13; Closing price: 398; Volume: 16,520; Closing price x volume: 6,574,960 Date: 2025-03-12; Closing price: 399; Volume: 28,411; Closing price x volume: 11,335,989 Date: 2025-03-11; Closing price: 398; Volume: 19,843; Closing price x volume: 7,897,514 Date: 2025-03-10; Closing price: 400; Volume: 22,788; Closing price x volume: 9,115,200 Date: 2025-03-07; Closing price: 399; Volume: 113,069; Closing price x volume: 45,114,531 Date: 2025-03-06; Closing price: 403; Volume: 32,718; Closing price x volume: 13,185,354 Date: 2025-03-05; Closing price: 409; Volume: 61,874; Closing price x volume: 25,306,466 Date: 2025-03-04; Closing price: 406; Volume: 23,732; Closing price x volume: 9,635,192 Date: 2025-02-28; Closing price: 404; Volume: 61,711; Closing price x volume: 24,931,244 Date: 2025-02-27; Closing price: 408; Volume: 27,457; Closing price x volume: 11,202,456 Date: 2025-02-26; Closing price: 413; Volume: 75,079; Closing price x volume: 31,007,627 Date: 2025-02-25; Closing price: 414; Volume: 31,966; Closing price x volume: 13,233,924 Date: 2025-02-24; Closing price: 414; Volume: 31,737; Closing price x volume: 13,139,118 Date: 2025-02-21; Closing price: 414; Volume: 44,706; Closing price x volume: 18,508,284 Date: 2025-02-20; Closing price: 404; Volume: 35,339; Closing price x volume: 14,276,956 Date: 2025-02-19; Closing price: 405; Volume: 95,829; Closing price x volume: 38,810,745 Date: 2025-02-18; Closing price: 407; Volume: 62,502; Closing price x volume: 25,438,314 Date: 2025-02-17; Closing price: 405; Volume: 12,060; Closing price x volume: 4,884,300 (1) Volume-weighted average price over the past 2 months before the day preceding the board resolution: KRW 392 (2) Volume-weighted average price over the past 1 month before the day preceding the board resolution: KRW 385 (3) Volume-weighted average price over the past 1 week before the day preceding the board resolution: KRW 373 Arithmetic average = ((1)+(2)+(3))/3: KRW 383

2. Details of appraisal-rights demands Classification: Common shares; Shares demanded: 66,786; Number of shareholders: 51; Status: Purchase completed; Demand period: May 30, 2025 - June 19, 2025; Amount demanded: KRW 25,579,038 Classification: Common shares; Shares demanded: 562; Number of shareholders: 1; Status: Price still under negotiation; Demand period: May 30, 2025 - June 19, 2025; Amount demanded: - Total: Shares demanded 67,348; Number of shareholders 52; Amount demanded: KRW 25,579,038 Note: The 562 shares for which agreement on price has not been reached became 112 shares as of the reporting date, after settlement of fractional shares following the 5-for-1 share consolidation effective June 16, 2026. As of the reporting date, these shares have not yet been purchased, and the above demanded amount relates only to the 66,786 shares for which the purchase has been completed.

3. Date of share purchase Of the 67,348 shares total for which appraisal rights were exercised, the purchase price of KRW 25,579,038 for the 66,786 shares on which agreement on price was reached was paid in full on July 18, 2026. The remaining 562 shares have not been purchased because agreement on price was not reached; following the 5-for-1 share consolidation effective June 16, 2026 and settlement of fractional shares, these shares number 112 as of the reporting date.

4. Source of funds for the share purchase: Company's own funds

5. Method of disposal of treasury shares acquired through the appraisal-rights demands: The 66,786 treasury shares acquired through the exercise of appraisal rights are included among the shares exchangeable under the company's 4th unregistered, interest-coupon-bearing, unsecured, privately placed exchangeable bonds. Following the 5-for-1 share consolidation effective June 16, 2026 and settlement of fractional shares, these treasury shares number 13,357 as of the reporting date.

6. Other matters: Not applicable

IV. Matters Relating to Creditor Protection: Not applicable V. Status of Related Litigation: Not applicable VI. Matters Relating to New Share Allotment, Etc.: Not applicable

VII. Summary Financial Information Before and After the Merger, Etc. (Unit: KRW thousand) Category: Before transfer / Change / After transfer Current assets: 49,628,761 / 24,693,022 / 74,321,783 Current assets held for sale: 57,409,482 / (34,497,900) / 22,911,582 Non-current assets: 116,464,285 / - / 116,464,285 Total assets: 223,502,528 / (9,804,878) / 213,697,650 Current liabilities: 55,933,123 / (6,899,580) / 49,033,543 Non-current liabilities: 14,976,724 / - / 14,976,724 Total liabilities: 70,909,847 / (6,899,580) / 64,010,267 Capital stock: 39,051,758 / - / 39,051,758 Retained earnings and other: 113,540,923 / (2,905,298) / 110,635,625 Total equity: 152,592,681 / (2,905,298) / 149,687,383 Total liabilities and equity: 223,502,528 / (9,804,878) / 213,697,650

(Note 1) The "before transfer" amounts above are based on the company's separate (non-consolidated) financial statements as of June 30, 2026. (Note 2) The "after transfer" amounts above reflect only a simple addition/subtraction of amounts related to this asset transfer, so actual figures may differ depending on the results of the external auditor's audit or review.