Largest Shareholder Stake Drops from 49.08% to 46.23%: Dilution from Convertible Bonds and Stock Options May Weaken Management Influence


  • The combined stake of RF Materials and its special relations decreased from 49.08% to 46.23%, a drop of 2.85 percentage points. This dilution resulted from an increase in total shares outstanding by approximately 1.08 million shares (8%) due to the exercise of conversion rights and stock options.
  • Although the actual number of shares held increased by 61,446 to 6,707,550, the ownership percentage fell.
  • The voting rights stake also declined from 48.66% to 46.23%, potentially weakening the controlling group's influence over management.
  • Affiliate RFHIC purchased 58,446 shares through open market buys, but this was insufficient to offset the overall dilution.
  • Executives Han Ki-woo and Cha Seong-il exercised stock options (100,000 and 12,500 shares respectively), increasing their holdings, and Kang Dae-ryong was added as a new special relation due to his appointment as an executive.
  • [AI Comprehensive Analysis]This disclosure highlights that dilution from convertible bonds and stock options could negatively impact the largest shareholder's control. While affiliate purchases signal support, they are modest relative to dilution, posing a potential short-term headwind for the stock price.

KOSDAQ Filing Information


  • Filing: Report on Large Shareholding (General)
  • Company: RF Systems (474610)
  • Submission: RF Materials Co., Ltd.
  • Receipt: 05-28-2026