• Y-Biologics CEO Park Young woo increased his stake to 23.02% from 23.01% on October 15, 2026.
• He bought 1,040 common shares on-market at 6,779 won each, bringing his holding to 3,546,062 shares.

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. Y-Biologics Inc. 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: 20261015000248), on October 15, 2026, and is solely responsible for the information contained therein.