Memory Chip Boom Catapults Founder Of Korean Semiconductor Equipment Maker To Billionaire Ranks

EO Technics shares rose, eO Technics shares rose over 40% so far this year.

Sung Kyu-dong holds a 28% stake and serves as founder and CEO, sung Kyu-dong holds a 28% stake in EO Technics and is the company's founder and CEO.

Sung Kyu-dong and family net worth estimated at $1 billion, forbes estimated Sung and his family's net worth at $1 billion as of Friday's close.

EO Technics reported 2025 revenue of 381 billion won, up 19% year‑on‑year, eO Technics reported revenue of 381 billion won in 2025, a 19% increase from a year earlier.

Reported 2025 net income of 58 billion won, up 35% year‑on‑year, eO Technics reported net income of 58 billion won in 2025, a 35% increase from a year earlier.