SEOYON Largest Shareholder Yu Yang-seok and Related Party's Stake Increases Slightly to 46.86%


  • Park Sung-jung, a specially related party of largest shareholder Yu Yang-seok, acquired an additional 56,479 common shares of SEOYON through open market purchases (approx. KRW 514 million)
  • This increased the total stake of Yu Yang-seok and five related parties from 46.62% to 46.86% (up 0.24 percentage points)
  • The acquisition was funded by Park Sung-jung's self-financing (earned income) of KRW 514 million
  • This report was voluntarily filed for informational purposes as it did not meet mandatory reporting thresholds
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KOSPI Filing Information


  • Filing: Report on Large Shareholding (General)
  • Company: SEOYON (007860)
  • Submission: Yu Yang-seok
  • Receipt: 05-21-2026