Unionized members of Kakao Corp. stage a rally near the company's headquarters in Pangyo, south of Seoul, on Wednesday. Photo by Yonhap

Unionized members at Kakao Corp. staged their first walkout in the company's history Wednesday, demanding higher bonuses and profit sharing.

The walkout and a rally took place near the messenger app operator's headquarters in Pangyo, south of Seoul, from 10 a.m., with around 1,500 members from five units of Kakao, including its headquarters, Kakao Pay and Kakao Enterprise, participating, according to the union.

Members marched around the company's headquarters alongside other IT companies in the area, holding white umbrellas.

The strike is expected to last around four hours until 3 p.m.