Lee Young-chul acquires 7.7M convertible bonds of Aprogen Biologics, securing 34.83% stake


  • Filer Lee Young-chul acquired 7,703,703 convertible bonds of Aprogen Biologics (holding ratio 34.83%) via over-the-counter purchase. Purpose is simple investment.
  • Acquisition price per convertible bond is KRW 3,375, total acquisition amount approximately KRW 26 billion.
  • No prior holdings (new report). No special related parties.

KOSPI Filing Information


  • Filing: Report on Large Shareholding (Short Form)
  • Company: Aprogen Biologics (003060)
  • Submission: Lee Young-chul
  • Receipt: 05-22-2026