Executive Insider Share Ownership Report - Director Acquires 500 Shares — Tese

Summary

Hyun Chang-hoon, a newly appointed non-registered Managing Director (appointed February 1, 2026), filed an initial insider ownership report disclosing the purchase of 500 common shares on May 8, 2026. The shares were acquired via open-market purchase at 168,800 KRW per share, representing a total transaction value of approximately 84.4 million KRW. The resulting ownership stake is negligible at 0.00% of the 11,061,429 total shares outstanding. As a small, initial filing by a newly-appointed executive rather than a major shareholder, this transaction carries minimal signaling value but indicates modest insider alignment with shareholders.

Historical Impact

10 past Insider Ownership Change · ≈ Form 4 events at Tese

Median +5d

+0.04%

Range

-5.80% to +16.16%

Positive outcomes

5/10

Filed	P₀	P₊₅	+5d
Apr 30, 2026	₩168,800	₩175,900	+4.21%
Mar 10, 2026	₩99,000	₩115,000	+16.16%

Full Translation

Report on Ownership Status of Specified Securities by Executives and Major Shareholders 6.1 TSE Co., Ltd. 2026-05-08 Report on Ownership Status of Specified Securities by Executives and Major Shareholders To: Securities and Futures Commission To: Korea Exchange Date of Reporting Obligation: May 8, 2026 Report Preparation Reference Date: May 11, 2026 * The reporter hereby confirms that, as of the report preparation reference date, they have accurately prepared the ownership status of their specified securities in accordance with relevant laws and preparation guidelines, and that there are no false statements or omissions of material matters. Reporter: Hyun Chang-hoon 1. Information on the Issuing Company - Company Name: TSE Co., Ltd. - Corporate Classification: KOSDAQ-listed Corporation - Company Code: 131290 - Total Issued Shares: 11,061,429 2. Information on the Reporter - Report Classification: New - Reporter Type: Individual (Domestic) - Name (Korean): Hyun Chang-hoon - Name (Hanja/English): 玄昌勳 - Date of Birth: 1977.06.15 - Address: Dongtan-gu, Hwaseong-si, Gyeonggi-do - Relationship to Issuer: Executive (Registration Status: Non-registered Executive) - Position: Managing Director (Sangmu) - Appointment Date: 2026.02.01 - Resignation Date: - - Major Shareholder: - Business Contact: - Affiliated Company: TSE Co., Ltd. - Department: IR Team - Position: Deputy General Manager (Chajang) - Phone: 041-58****** - Contact Name: Bae Geon-ho - Fax: 041-581-8009 - Email: ******.bae@tse21.com 3. Ownership Status of Specified Securities A. Number and Ownership Ratio of Specified Securities Owned Report Reference Date / Specified Securities (Number of Shares / Ratio %) / Common Stock (Number of Shares / Ratio %) - Prior Report: - / - / - / - - This Report (May 11, 2026): 500 / 0.00 / 500 / 0.00 - Change: 500 / 0.00 / 500 / 0.00 B. Ownership Breakdown by Type of Specified Securities Details of Specified Securities: - Common Stock (A): 500 shares - Warrants for New Shares (B): - - Convertible Bonds (C): - - Bonds with Warrants (D): - - Participating Bonds (E): - - Exchangeable Bonds (F): - - Depositary Receipts (G): - - Other (H): - - Total (I): 500 shares (0.00%) Total Issued Shares (J): 11,061,429 Number of Non-Stock Specified Securities (B+C+D+E+F+G+H=I): - Ownership Ratio (%): 0.00 Ownership Ratio of Specified Securities [A+I / J+I-(F+G+H)] x 100: 0.00 Ownership Ratio of Common Stock (A / J) x 100: 0.00 * For exchangeable bonds where the exchange target is stock, and for depositary receipts and derivative-linked securities where the underlying asset is stock, the denominator is adjusted accordingly when calculating the ownership ratio. C. Detailed Change History Reason for Change: On-market purchase (+) Date of Change: May 8, 2026 Type of Specified Security: Common Stock Shares Held Before: - Change: +500 Shares Held After: 500 Acquisition/Disposal Unit Price (KRW): 168,800 Remarks: - Trading Plan Report Date: - Total: -, +500, 500, -, - * For securities market trades, the contract settlement date is shown. ** For securities other than stock, this refers to the exercise (conversion/exchange) price or the trading unit price of the stock acquired/disposed through exercise of rights; amounts in parentheses indicate the trading unit price of the relevant security.