Major Shareholding Report: Related Party On-Market Sale Reduces Holdings by 706 Shares — Tese

Summary

CEO Kim Chul Ho filed an amended major shareholding report following an on-market sale by a related party, with the reporting group's combined stake decreasing by 706 shares to 3,219,696 shares. Despite the share count reduction, the ownership ratio remains unchanged at 29.11% of the 11,061,429 voting shares outstanding. The number of related parties declined from 10 to 9, suggesting one related party exited the reporting group entirely. The stated purpose remains influence over management control, consistent with Kim's role as CEO. The transaction is immaterial in size and unlikely to signal any meaningful shift in insider sentiment or control structure.

Historical Impact

5 past Large Holding Report (5%+) · ≈ Schedule 13D/G events at Tese

Median +5d

-0.68%

Range

-16.85% to +25.52%

Positive outcomes

2/5

Filed	P₀	P₊₅	+5d
Jul 1, 2026	₩276,000	₩229,500	-16.85%
Apr 9, 2026	₩119,100	₩149,500	+25.52%

Full Translation

Report on Major Shareholding of Stocks, Etc. (General) Version 6.0 TSE Co., Ltd. Report on Major Shareholding of Stocks, Etc. (General Form: For reports under Article 147 of the Financial Investment Services and Capital Markets Act, where the purpose is 'to influence management control') To: Financial Services Commission Date of Reporting Obligation: May 11, 2026 To: Korea Exchange Report Reference Date: May 11, 2026 Reporter: Kim Chul Ho === SUMMARY INFORMATION === Issuing Company: TSE Co., Ltd. Relationship with Issuer: Major Shareholder Report Type: Change Number and Ratio of Shares Held: - Previous Report: 3,220,402 shares (29.11%) - Current Report: 3,219,696 shares (29.11%) Shares Under Major Contracts: None (both periods) Voting Rights Held: - Previous Report: 3,220,402 (29.11%) - Current Report: 3,219,696 (29.11%) Voting Rights Under Major Contracts: None (both periods) Reason for Report: On-market sale by related party The reporter hereby confirms that as of the reference date, the holdings of the reporter and related parties have been accurately prepared in accordance with applicable laws and reporting guidelines, with no false statements or omissions of material information. === PART 1: REPORT OVERVIEW === 1. Matters Concerning the Issuing Company - Company Name: TSE Co., Ltd. - Company Code: 131290 - Corporate Classification: KOSDAQ-Listed Corporation - Total Voting Shares Issued: 11,061,429 2. Matters Concerning the Major Holder A. Reporter (1) Reporter Overview - Report Type: Change (Joint) - Reporter Classification: Individual (Domestic) - Nationality: Republic of Korea - Name: Kim Chul Ho (金喆浩 / Kim Chul Ho) - Address: Bongseosan 1-gil, Seobuk-gu, Cheonan-si, Chungcheongnam-do - Date of Birth: July 15, 1963 - Occupation: Chief Executive Officer - Relationship with Issuer: Major Shareholder - Contact: TSE Co., Ltd., IR Team, Manager Bae Geon-ho, Phone 041-58******, Email ******.bae@tse21.com B. Related Parties (1) Related Party Overview: 1. Kim Jung-hee — Individual (Domestic), Family relative, b. Nov 19, 1967, Cheonan, Shareholder 2. Kim So-hyung — Individual (Domestic), Family relative, b. Dec 24, 1992, Cheonan, Shareholder 3. Kim Sung-soo — Individual (Domestic), Family relative, b. Oct 24, 1996, Cheonan, Shareholder 4. Kim Soon-ja — Individual (Domestic), Family relative, b. Aug 7, 1956, Chilgok-gun, Gyeongbuk, Shareholder 5. Kim Kyung-sook — Individual (Domestic), Family relative, b. Jun 10, 1960, Chilgok-gun, Gyeongbuk, Shareholder 6. Cho In-sook — Individual (Domestic), Family relative, b. Apr 15, 1985, Gangdong-gu, Seoul, Shareholder 7. Lee Ji-yeon — Individual (Domestic), Family relative, b. Jan 27, 1987, Suseong-gu, Daegu, Shareholder 8. Cho In-gi — Individual (Domestic), Family relative, b. Apr 15, 1987, Gangdong-gu, Seoul, Shareholder C. Collective Investment Business Operator: Not applicable 3. Number and Ratio of Shares Held - Previous Report (Feb 6, 2026): Kim Chul Ho + 10 related parties — 3,220,402 shares (29.11%) - Current Report (May 11, 2026): Kim Chul Ho + 9 related parties — 3,219,696 shares (29.11%) - Change: -706 shares (0.00% ratio change) - Total Voting Shares Issued: 11,061,429 4. Purpose of Holding: Influence over Management Control Kim Chul Ho, as CEO of the issuer, effectively exercises influence over the company. Going forward, in his capacity as CEO, he will undertake actions related to company operations in alignment with the company's management objectives. 5. Reason for Change - Method of Change: On-market sale - Reason for Change: On-market sale by related party - Reason for Modification: None === PART 2: MAJOR HOLDING DETAILS === 1. Holdings by Reporter and Related Parties A. Holdings by Type of Securities (all holdings in common stock; no warrants, convertible bonds, BWs, EBs, DRs, or other instruments): - Kim Chul Ho (Reporter): 2,008,137 shares (18.15%) - Kim Jung-hee: 173,826 shares (1.57%) - Kim So-hyung: 518,500 shares (4.69%) - Kim Sung-soo: 518,300 shares (4.69%) - Kim Soon-ja: 300 shares (0.00%) - Kim Kyung-sook: 133 shares (0.00%) - Cho In-sook: 0 shares (0.00%) - Lee Ji-yeon: 500 shares (0.00%) - Cho In-gi: 0 shares (0.00%) Total Voting Shares Issued (I): 11,061,429 Shareholding Ratio: 29.11% Common Stock Ratio (A/I × 100): 29.11% Note: For exchangeable bonds, depositary receipts, derivative-linked securities whose underlying is stock, and stock options delivering treasury shares, such amounts are excluded from the denominator when calculating the holding ratio. B. Holdings by Form (all holdings classified under Item 1 — ownership for one's own account regardless of nominal title, per Article 142 of the Enforcement Decree of the Financial Investment Services and Capital Markets Act): - Kim Chul Ho: 2,008,137 shares (18.15%) - Kim Jung-hee: 173,826 shares (1.57%) - Kim So-hyung: 518,500 shares (4.69%) - Kim Sung-soo: 518,300 shares (4.69%) - Kim Soon-ja: 300 shares (0.00%) - Kim Kyung-sook: 133 shares (0.00%) - Cho In-sook: 0 shares (0.00%) - Lee Ji-yeon: 500 shares (0.00%) - Cho In-gi: 0 shares (0.00%) [Translation truncated]