Wrtn Technologies, a South Korean AI service platform company, has formally begun its initial public offering preparations after selecting Mirae Asset Securities as lead underwriter and NH Investment & Securities as co-underwriter. The company plans to coordinate the offering timetable with its advisers and targets filing for preliminary review next year. Wrtn entered the unicorn ranks in August after raising 100 billion won in Series C funding at a valuation above 1 trillion won, taking cumulative investment to about 230 billion won. It is the only AI services company among five South Korean AI startups valued above 1 trillion won, alongside Rebellions, FuriosaAI, Galaxy Corporation and Upstage.