Y-Biologics Major Shareholder Park Young-woo's Stake Slightly Drops to 30.28% Due to Related Party's Stock Option Exercise


  • Y-Biologics major shareholder Park Young-woo reported a change in holding form due to the exercise of 60,000 stock options by related party Jang Woo-ik on April 9, 2026.
  • As a result, total outstanding shares increased to 15,366,681, and the combined ownership of Park and his special relations decreased from 30.66% to 30.28%, a drop of 0.38 percentage points.
  • The exercise price was 9,767 KRW per share, and total acquisition funds amounted to 586,020,000 KRW, of which 100,000,000 KRW was borrowed.
  • This is an existing option exercise, not a new capital raise or convertible bond issuance, resulting in negligible dilution for existing shareholders.
  • [AI Summary]The change in Y-Biologics major shareholder's stake is a technical adjustment due to a small-scale stock option exercise by a related party, involving no change in management control or capital structure. Therefore, its impact on short-term stock price is limited and investment risk is low.

KOSDAQ Filing Information


  • Report on Large Shareholding (General)
  • Company: Y-Biologics (338840)
  • Submission: Park Young-woo

  • Shares: 15,178,081
  • Price: 25,800 KRW
  • Market Cap: 391.6 B KRW