소액주주가 · 소액주주를
minority shareholder, small shareholder
Example
소액주주들이 회사의 결정에 강하게 반대했습니다.
Minority shareholders strongly opposed the company's decision.
Word parts
소 small+액 amount+주 stock+주 owner
Literally 'small-amount stock owner.'
Good to know
Small retail investors are jokingly called 개미 'ants' in Korean.