WOOSUNG MATERIALS' Largest Shareholder WS and Special Relations Increase Stake to 18.69% via Open Market Purchases, Strengthening Management Control


  • WS (Filer) and its special relations (Lim Jong-chan, Woosung Metal) acquired 183,668 additional shares of WOOSUNG MATERIALS through open market purchases from March 30 to May 27, 2026, increasing their combined stake from 17.53% to 18.69% (up 1.16 percentage points).
  • Total acquisition funds amounted to approximately 530 million KRW (Woosung Metal: 523 million, Lim Jong-chan: 6.88 million), all from internal funds with no borrowings.
  • As of the report date, WS holds 16.55%, Lim Jong-chan 0.99%, and Woosung Metal 1.14%, totaling 18.69%, maintaining their status as the largest shareholder.
  • A 10:1 stock split occurred on April 15, 2026, but the continued buying post-split indicates commitment to management stability.
  • [AI Comprehensive Analysis]The insider buying by the largest shareholder and special relations may signal perceived undervaluation and intent to solidify control, but the stake increase is modest (1.16%p) and does not alter fundamental corporate value, making this a neutral routine disclosure with limited price impact.

KOSPI Filing Information


  • Filing: Report on Large Shareholding (General)
  • Company: WOOSUNG MATERIALS (011300)
  • Submission: WS
  • Receipt: 05-29-2026