• Kim Joong-Kun raised his stake in Bookook Securities to 3,667,251 shares, or 35.36%, from 3,664,777 shares, or 35.34%.
• The disclosure cited open-market purchases as the reason for the change.
• The reporting obligation was triggered on Oct. 12, 2026; the filing date was Oct. 14, 2026.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Bookook Securities Co. Ltd. published the original content used to generate this news brief via DART, the regulatory disclosure system operated by the South Korea Financial Supervisory Service (FSS) (Ref. ID: 20261014000422), on October 14, 2026, and is solely responsible for the information contained therein.