Treasury share acquisition: results report

What happened

Treasury Share Acquisition Results Report / Gamsung Corporation Co., Ltd.

To the Governor of the Financial Supervisory Service July 8, 2026 Company name: Gamsung Corporation Co., Ltd. CEO: Kim Ho-seon Head office: 4F, 162 Bangbae-ro, Seocho-gu, Seoul (Bangbae-dong, Yegwang Building) Phone: 02-3140-1000; Website: http://www.gamsungcorp.co.kr Preparer: Title Executive Director, Name Choi Ju-won, Phone 02-3140-1017

1. Name and address of issuer a. Name: Gamsung Corporation Co., Ltd. b. Address: 4F, 162 Bangbae-ro, Seocho-gu, Seoul (Bangbae-dong, Yegwang Building)

2. Acquisition report details a. Material event report filing date: June 23, 2026 b. Acquisition period: June 24, 2026 to July 3, 2026 (trade-date basis; acquisition completed / final settlement on July 7, 2026)

3. Acquisition details (Unit: KRW, shares) - date / order qty / acquired qty / price per share / total value / broker (ID): June 24, 2026: Common shares; order 90,000, acquired 90,000; KRW 4,215/share; total KRW 379,410,250; Samsung Securities (00104856) June 25, 2026: Common shares; order 70,000, acquired 70,000; KRW 3,880/share; total KRW 271,600,875; Samsung Securities (00104856) June 26, 2026: Common shares; order 150,000, acquired 150,000; KRW 3,657/share; total KRW 548,633,675; Samsung Securities (00104856) June 29, 2026: Common shares; order 150,000, acquired 129,047; KRW 3,903/share; total KRW 503,765,945; Samsung Securities (00104856) June 30, 2026: Common shares; order 70,000, acquired 57,775; KRW 4,043/share; total KRW 233,606,600; Samsung Securities (00104856) July 1, 2026: Common shares; order 60,000, acquired 34,428; KRW 4,121/share; total KRW 141,882,610; Samsung Securities (00104856) July 2, 2026: Common shares; order 50,000, acquired 50,000; KRW 4,247/share; total KRW 212,371,425; Samsung Securities (00104856) July 3, 2026: Common shares; order 49,697, acquired 49,654; KRW 4,203/share; total KRW 208,727,980; Samsung Securities (00104856) Total: order 689,697, acquired 630,904; average price KRW 3,963/share; total KRW 2,499,999,360

Note: The dates above are based on the purchase trade date; the acquisition (settlement) date is each trade date plus 2 business days. Note: The price per share and total acquisition value above do not include fees.

4. Whether the planned acquisition matches the actual acquisition Common shares: planned amount KRW 2,500,000,000, other shares -; actual total value KRW 2,499,999,360, other shares -; shortfall: -; reason: - Note: The total acquisition value above does not include fees. Including all fees, total funds used were KRW 2,504,999,354. Note: Under the amended "Regulation on Issuance and Disclosure of Securities," the completion standard for treasury share acquisitions changed from the "number of shares reported for acquisition" to the "planned acquisition amount." The Company acquired shares within the planned acquisition amount stated in its Material Event Report (Treasury Share Acquisition Decision). Because the share price fell during the acquisition period, the number of shares that could be acquired increased, resulting in a difference between the planned share count in that disclosure (571,428 common shares) and the actual share count acquired (630,904 common shares).

5. Treasury shares held after acquisition [as of July 8, 2026] (Unit: KRW, shares, %) Common shares: holdings under Article 165-3 of the FSCMA (A): quantity 630,904, ratio 0.70%, total value KRW 2,499,999,360; trust-contract holdings (B): -; Total (A+B): quantity 630,904, ratio 0.70%, amount KRW 2,499,999,360 Note: The ratio above is relative to total issued shares of 89,862,944. Including all fees, total funds used were KRW 2,504,999,354.

6. Changes in the largest shareholder's shareholding before and after acquisition [as of July 8, 2026] Kim Ho-seon: Common shares; at acquisition report date 22,000,000; at acquisition completion date 22,000,000; reason for change: - Total: 22,000,000; 22,000,000; -