Corentec's Controlling Shareholder Doohoon Sun Increases Stake by 11,254 Shares via Open Market Purchase, No Material Impact on Shareholder Value

Corentec's de facto controlling shareholder Doohoon Sun acquired an additional 11,254 voting shares through open market purchases on May 28, 2026, slightly increasing his stake from 5.11% to 5.19%.
The purchase prices ranged from 4,890 won to 5,060 won per share, with a total acquisition cost of approximately 55,961,925 won funded from his personal cash holdings.
This share change does not involve any capital increase or new share issuance, and no significant contract modifications occurred apart from the extension of existing stock pledge agreements.
The combined beneficial ownership of Doohoon Sun and his special relations stands at 21.15% of total shares and 18.67% of common shares, a marginal increase of 0.08 percentage points with limited impact on corporate control.
[AI Summary]This filing is an amendment reporting a minor open market purchase by the controlling shareholder, resulting in no capital raising or dilution effects and a neutral impact on shareholder value. Existing pledge contracts remain unchanged, and the likelihood of a change in control is low.