Treasury share acquisition: results report

What happened

Treasury Share Acquisition: Results Report 6.0 SIMPAC Co., Ltd. Treasury Share Acquisition: Results Report To the Governor of the Financial Supervisory Service August 11, 2026 Company name: SIMPAC Co., Ltd. CEOs: Choi Jin-sik, Song Hyo-seok Head office address: 141 Bupyeongbuk-ro, Bupyeong-gu, Incheon (Tel) 032-510-0044 (Website) http://www.simpac.com Preparer: (Title) Executive Director (Name) Jeong Yeon-jung (Tel) 02-3780-4937

1. Issuer's name and address (a) Name: SIMPAC Co., Ltd. (b) Address: 141 Bupyeongbuk-ro, Bupyeong-gu, Incheon

2. Acquisition reporting (a) Material event report filing date: June 29, 2026 (b) Acquisition period: June 30, 2026 to August 4, 2026

3. Acquisition details (KRW, shares; by trade date - quantity ordered, quantity acquired, average acquisition price per share, total acquisition amount, brokerage firm, financial investment business ID) 2026.06.30: ordered 50,000; acquired 39,249; price 4,420; amount 173,489,122; Samsung Securities; 00104856 2026.07.01: ordered 50,000; acquired 47,000; price 4,712; amount 221,464,115; Samsung Securities; 00104856 2026.07.02: ordered 50,000; acquired 46,000; price 4,683; amount 215,430,235; Samsung Securities; 00104856 2026.07.03: ordered 50,000; acquired 49,500; price 4,655; amount 230,440,595; Samsung Securities; 00104856 2026.07.06: ordered 50,000; acquired 20,903; price 4,810; amount 100,560,895; Samsung Securities; 00104856 2026.07.07: ordered 50,000; acquired 28,300; price 4,951; amount 140,127,200; Samsung Securities; 00104856 2026.07.08: ordered 50,000; acquired 47,506; price 5,114; amount 242,974,295; Samsung Securities; 00104856 2026.07.09: ordered 50,000; acquired 35,572; price 5,138; amount 182,771,170; Samsung Securities; 00104856 2026.07.10: ordered 50,000; acquired 23,132; price 5,345; amount 123,648,050; Samsung Securities; 00104856 2026.07.13: ordered 50,000; acquired 50,000; price 5,154; amount 257,730,100; Samsung Securities; 00104856 2026.07.14: ordered 50,000; acquired 50,000; price 4,843; amount 242,193,910; Samsung Securities; 00104856 2026.07.15: ordered 50,000; acquired 36,339; price 4,835; amount 175,719,080; Samsung Securities; 00104856 2026.07.16: ordered 50,000; acquired 48,000; price 4,865; amount 233,546,370; Samsung Securities; 00104856 2026.07.20: ordered 50,000; acquired 50,000; price 4,793; amount 239,665,380; Samsung Securities; 00104856 2026.07.21: ordered 50,000; acquired 50,000; price 4,397; amount 219,877,885; Samsung Securities; 00104856 2026.07.22: ordered 50,000; acquired 37,903; price 4,426; amount 167,777,465; Samsung Securities; 00104856 2026.07.23: ordered 50,000; acquired 37,000; price 4,530; amount 167,614,270; Samsung Securities; 00104856 2026.07.24: ordered 50,000; acquired 50,000; price 4,673; amount 233,651,195; Samsung Securities; 00104856 2026.07.27: ordered 50,000; acquired 50,000; price 4,771; amount 238,582,620; Samsung Securities; 00104856 2026.07.28: ordered 50,000; acquired 50,000; price 4,710; amount 235,502,905; Samsung Securities; 00104856 2026.07.29: ordered 50,000; acquired 50,000; price 4,609; amount 230,465,155; Samsung Securities; 00104856 2026.07.30: ordered 50,000; acquired 43,060; price 4,562; amount 196,482,525; Samsung Securities; 00104856 2026.07.31: ordered 50,000; acquired 33,667; price 4,647; amount 156,482,050; Samsung Securities; 00104856 2026.08.03: ordered 50,000; acquired 50,000; price 4,764; amount 238,202,370; Samsung Securities; 00104856 2026.08.04: ordered 29,700; acquired 29,700; price 4,656; amount 138,306,190; Samsung Securities; 00104856 Total: ordered 1,229,700; acquired 1,052,831; average price 4,752; total amount 5,002,705,147 Note: Dates are trade dates; average acquisition price is an average unit price; neither the per-share price nor the total amount includes brokerage fees.

4. Whether the planned and actual acquisition amounts match Planned acquisition amount (KRW): common shares 5,000,000,000; other-class shares - Actual total acquisition amount (KRW): common shares 5,002,705,147; other-class shares - Shortfall vs. plan: matched; reason for shortfall: -

5. Treasury-share holdings after the acquisition (as of August 11, 2026; KRW million, shares, %) Common shares held under Article 165-3 of the Financial Investment Services and Capital Markets Act: 10,708,020 shares (16.38%), total value KRW 38,628 million Held under an Article 165-3 trust contract: none Total: 10,708,020 shares (16.38%), KRW 38,628 million Note: the company separately holds 677,904 shares (1.04%) of treasury stock acquired outside the Article 165-3 acquisition program.

6. Change in the largest shareholder's shareholding before and after the acquisition (as of August 11, 2026; shares) Choi Jin-sik: common shares 14,794,432 before and after the acquisition reporting period; no change Total: common shares 14,794,432; combined total 14,794,432; no change