Seohan up 29.9% today

Closed at ₩5,040 (+29.9%) on Oct 21, 2026. What we found that may explain it: • Filing: Major sales or supply contract • Filing: Amended: Major sales or supply contract What the trading data shows: • Trading value was 55.4× its 20-day average. • Foreign investors sold a net ₩708,661. • Institutions bought a net ₩180M.