Treasury share acquisition: results report

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Treasury Share Acquisition Results Report 6.0

Sunjin Beauty Science Co., Ltd. Treasury Share Acquisition Results Report

To the Governor of the Financial Supervisory Service September 3, 2026

Company name: Sunjin Beauty Science Co., Ltd. Representative Director: Lee Seong-ho Head office address: Sunjin Beauty Science, 16th floor, Gasan Urban Walk 2, 143 Gasan Digital 2-ro, Geumcheon-gu, Seoul (Phone) 02-853-3214 (Website) http://sunjinbs.co.kr Person responsible for preparation: (Title) Head of Management Planning Office (Name) Yoo Hyo-haeng (Phone) 02-853-3214

1. Name and address of the issuer (a) Name: Sunjin Beauty Science Co., Ltd. (b) Address: Sunjin Beauty Science, 16th floor, Gasan Urban Walk 2, 143 Gasan Digital 2-ro, Geumcheon-gu, Seoul

2. Details of the acquisition report (a) Date of submission of material event report: June 30, 2026 (b) Acquisition period: from July 2, 2026 to September 2, 2026 * The acquisition period above is based on the trade execution date.

3. Acquisition details (unit: KRW, shares) Date: July 2, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,528; Total price: 75,275,270; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 3, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,638; Total price: 76,382,070; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 6, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,694; Total price: 76,943,200; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 7, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,544; Total price: 75,435,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 8, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,328; Total price: 73,280,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 9, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,026; Total price: 70,259,250; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 10, 2026; Order quantity: 10,000; Acquired quantity: 6,358; Price per share: 7,268; Total price: 46,211,920; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 13, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,397; Total price: 73,970,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 14, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,049; Total price: 70,489,910; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 15, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,168; Total price: 71,680,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 16, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,234; Total price: 72,340,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 20, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,007; Total price: 70,070,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 21, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 6,808; Total price: 68,078,980; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 22, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 6,840; Total price: 68,400,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 23, 2026; Order quantity: 30,000; Acquired quantity: 30,000; Price per share: 7,253; Total price: 217,598,240; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 24, 2026; Order quantity: 30,000; Acquired quantity: 30,000; Price per share: 7,341; Total price: 220,239,860; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 27, 2026; Order quantity: 30,000; Acquired quantity: 15,001; Price per share: 7,560; Total price: 113,414,850; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 28, 2026; Order quantity: 30,000; Acquired quantity: 30,000; Price per share: 7,561; Total price: 226,838,520; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 29, 2026; Order quantity: 20,000; Acquired quantity: 20,000; Price per share: 7,636; Total price: 152,720,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 30, 2026; Order quantity: 30,000; Acquired quantity: 30,000; Price per share: 7,314; Total price: 219,428,330; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: July 31, 2026; Order quantity: 20,000; Acquired quantity: 15,032; Price per share: 7,419; Total price: 111,528,160; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 4, 2026; Order quantity: 15,000; Acquired quantity: 4,346; Price per share: 7,641; Total price: 33,208,830; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 5, 2026; Order quantity: 10,000; Acquired quantity: 4,369; Price per share: 7,680; Total price: 33,555,990; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 6, 2026; Order quantity: 10,000; Acquired quantity: 6,250; Price per share: 7,665; Total price: 47,907,500; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 7, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,737; Total price: 77,366,530; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 10, 2026; Order quantity: 10,000; Acquired quantity: 3,137; Price per share: 7,861; Total price: 24,659,970; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 11, 2026; Order quantity: 10,000; Acquired quantity: 323; Price per share: 8,100; Total price: 2,616,300; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 12, 2026; Order quantity: 5,000; Acquired quantity: 5,000; Price per share: 8,411; Total price: 42,055,700; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 13, 2026; Order quantity: 5,000; Acquired quantity: 5,000; Price per share: 8,315; Total price: 41,574,640; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 14, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 8,356; Total price: 83,556,640; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 18, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 8,091; Total price: 80,908,230; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 19, 2026; Order quantity: 10,000; Acquired quantity: 10,000; Price per share: 7,973; Total price: 79,733,440; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 20, 2026; Order quantity: 10,000; Acquired quantity: 6,172; Price per share: 7,705; Total price: 47,555,520; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 21, 2026; Order quantity: 10,000; Acquired quantity: 9,456; Price per share: 7,789; Total price: 73,651,200; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 24, 2026; Order quantity: 5,000; Acquired quantity: 1,230; Price per share: 7,930; Total price: 9,754,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 25, 2026; Order quantity: 5,000; Acquired quantity: 200; Price per share: 8,095; Total price: 1,619,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 26, 2026; Order quantity: 5,000; Acquired quantity: 5,000; Price per share: 8,158; Total price: 40,789,170; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 27, 2026; Order quantity: 2,000; Acquired quantity: 2,000; Price per share: 8,077; Total price: 16,154,000; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 28, 2026; Order quantity: 800; Acquired quantity: 800; Price per share: 7,977; Total price: 6,381,950; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: August 31, 2026; Order quantity: 40; Acquired quantity: 40; Price per share: 8,070; Total price: 322,800; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: September 1, 2026; Order quantity: 750; Acquired quantity: 750; Price per share: 7,960; Total price: 5,970,250; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Date: September 2, 2026; Order quantity: 9; Acquired quantity: 9; Price per share: 7,600; Total price: 68,400; Brokerage: Shinhan Investment Corp; Entity ID: 00138321 Total: Order quantity 473,599; Acquired quantity 400,473; average price per share 7,638; Total acquisition price 2,999,993,620

* The dates above are based on the trade execution date, and the total acquisition price does not include fees and commissions. * The acquisition price per share is the average unit price.

4. Whether the planned and actual acquisition amounts match Planned acquisition amount (KRW): common shares 3,000,000,000; other shares - Total acquisition price (KRW): common shares 2,999,993,620; other shares - Shortfall against planned acquisition amount: none Reason for any shortfall: -

Note 1) The company completed the treasury share acquisition within the planned acquisition amount stated in the material event report (treasury share acquisition decision); the difference between the planned acquisition amount and the total acquisition price is less than the price of one share.

5. Holding status of treasury shares, etc. after acquisition, as of September 3, 2026 (unit: KRW, shares, %) Share type: common shares Holdings under Article 165-3 of the Act (A): quantity 593,493; ratio 4.86; total value 4,250,121,480 Holdings under trust agreements per Article 165-3 of the Act (B): quantity -; ratio -; contract amount - Total (A+B): quantity 593,493; ratio 4.86; amount 4,250,121,480 Total row: quantity 593,493; ratio 4.86; total value 4,250,121,480; (B) -; Total (A+B) quantity 593,493; ratio 4.86; amount 4,250,121,480

Note 1) The "quantity" in "Holdings under Article 165-3 of the Act (A)" above is the sum of 193,020 treasury shares previously held directly by the company and 400,473 shares acquired in this transaction; "total value" and "amount" include fees and commissions. Note 2) The "ratio" above is the treasury share holding ratio relative to total shares outstanding (12,203,280 shares).

6. Change in the largest shareholder's shareholding before and after the acquisition [as of September 3, 2026] (unit: shares) Name: Lee Seong-ho; Share type: common shares; Shares held as of acquisition report date: 4,644,723; Shares held as of acquisition end date: 4,644,723; Reason for change: - Total: common shares 4,644,723 / 4,644,723 / -; other shares -/-/- Grand total: 4,644,723 / 4,644,723 / -