Treasury share acquisition: results report

What happened

Treasury Share Acquisition: Results Report 6.0 KH Vatec Co., Ltd. To: The Governor of the Financial Supervisory Service July 28, 2026

Company name: KH Vatec Co., Ltd. CEO: Nam Kwang-hee Head office: 53-12 1gongdan-ro 10-gil, Gumi-si, Gyeongsangbuk-do (Tel) 054-465-0630 (Website) http://www.khvatec.com Preparer: (Title) Head of Management Support Division (Name) Yeo Sang-myung (Tel) 054-465-0630

1. Name and address of the issuer (a) Name: KH Vatec Co., Ltd. (b) Address: 53-12 1gongdan-ro 10-gil, Gumi-si, Gyeongsangbuk-do

2. Matters relating to the acquisition report (a) Filing date of the material event report: June 24, 2026 (Wed) (b) Acquisition period: From June 25, 2026 to July 23, 2026 Note: The above acquisition period is based on the trade-execution date.

3. Acquisition details (Unit: KRW, shares) Date: 2026.06.25; Type: Common shares; Order quantity: 20,000; Quantity acquired: 20,000; Average price per share: 10,380; Total acquisition amount: 207,590,620; Broker: Hyundai Motor Securities Co., Ltd.; Entity ID: 00137997 Date: 2026.06.26; Common shares; 20,000; 20,000; 9,905; 198,106,455; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.06.29; Common shares; 15,000; 15,000; 10,420; 156,299,020; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.06.30; Common shares; 15,000; 15,000; 10,704; 160,557,980; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.01; Common shares; 15,000; 15,000; 11,124; 166,854,330; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.02; Common shares; 15,000; 15,000; 10,520; 157,792,870; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.03; Common shares; 15,000; 15,000; 10,206; 153,083,165; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.06; Common shares; 15,000; 15,000; 10,197; 152,955,290; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.07; Common shares; 15,000; 15,000; 9,988; 149,819,650; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.08; Common shares; 15,000; 15,000; 9,885; 148,281,190; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.09; Common shares; 15,000; 15,000; 9,670; 145,056,130; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.10; Common shares; 15,000; 15,000; 10,247; 153,703,700; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.13; Common shares; 10,000; 10,000; 9,869; 98,685,710; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.14; Common shares; 10,000; 10,000; 9,206; 92,063,450; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.15; Common shares; 7,442; 7,442; 9,897; 73,651,320; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.16; Common shares; 7,000; 7,000; 9,600; 67,199,460; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.20; Common shares; 8,000; 8,000; 9,174; 73,395,185; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.21; Common shares; 3,000; 3,000; 9,037; 27,110,425; Hyundai Motor Securities Co., Ltd.; 00137997 Date: 2026.07.23; Common shares; 1,000; 1,000; 10,141; 10,140,980; Hyundai Motor Securities Co., Ltd.; 00137997 Total: -; 236,442; 236,442; 10,118; 2,392,346,930; -; - Note 1) The "date" above is based on the trade-execution date. Note 2) The "average price per share" above is the average unit price. Note 3) The "average price per share" and "total acquisition amount" above exclude brokerage fees.

4. Whether the planned acquisition matches the actual acquisition Planned acquisition amount (KRW): Common shares 2,400,000,000; Other shares: - Actual total acquisition amount (KRW): Common shares 2,392,346,930; Other shares: - Whether the actual amount fell short of the planned amount: -; Reason if a shortfall occurred: - Note 1) The company completed the treasury-share acquisition within the planned acquisition amount stated in the material event report (treasury share acquisition decision) disclosure. Note 2) The actual quantity acquired was 236,442 shares, exceeding the planned quantity (231,660 shares); this resulted from share-price movements during the acquisition period.

5. Treasury-share holding status after the acquisition [As of July 28, 2026] (Unit: KRW, shares, %) Share type: Common shares; Holdings under Article 165-3 (A): Quantity 236,442, Ratio 1.0%, Total value 2,394,739,190; Holdings under a trust agreement per Article 165-3 (B): -; Total (A+B): Quantity 236,442, Ratio 1.0%, Amount 2,394,739,190 Share type: Common shares; Holdings (A): Quantity 1,500,854, Ratio 6.3%, Total value 20,963,286,852; (B): -; Total (A+B): Quantity 1,500,854, Ratio 6.3%, Amount 20,963,286,852 Total: Quantity 1,737,296, Ratio 7.3%, Total value 23,358,026,042; (B): -; Total (A+B): Quantity 1,737,296, Ratio 7.3%, Amount 23,358,026,042 Note 1) The "total value" above includes brokerage fees. Note 2) The "ratio" above is based on total shares outstanding of 23,677,442 shares. Note 3) The 1,500,854 common shares above are treasury shares reserved for exchange under the exchangeable bonds the company issued on September 12, 2025 (the total shares reserved for exchange at issuance were 1,640,000 shares, but as of this filing date 139,146 shares have been exchanged, leaving a balance of 1,500,854 shares). These treasury shares are currently held in deposit at the Korea Securities Depository, with disposal to be finalized upon any future exercise of the exchange right.

6. Change in the largest shareholder's shareholding before and after the acquisition [As of July 28, 2026] (Unit: shares) Name: Nam Kwang-hee; Share type: Common shares; Shares at acquisition-report date: 3,291,190; Shares at acquisition-end date: 3,291,190; Reason for change: - Total: Common shares: 3,291,190; 3,291,190; -; Other shares: -; -; - Grand total: 3,291,190; 3,291,190; -