Booster Executive Yoo Deok-gi Increases Stake by 0.21 Percent via Treasury Stock Bonus

Booster's unregistered executive Yoo Deok-gi acquired 17,885 common shares as a treasury stock bonus on June 19, 2026.
His total holdings increased from 3,213 to 21,098 shares, raising his ownership ratio from 0.04% to 0.25%.
The stake change represents only 0.21% of total outstanding shares, resulting in negligible dilution for existing shareholders.
[AI Summary]This disclosure reflects a routine executive compensation in treasury shares with no capital raising or governance implications. The marginal increase in ownership has minimal impact on shareholder value.