How the IPO Process Works in South Korea
A Korean IPO takes between twelve and eighteen months from the first serious conversation with an underwriter to the opening bell. The process is tightly sequenced: appoint advisers, pass due diligence, clear the exchange's review, file with the regulator, build the book and price. Skip a step or do one badly, and the whole timetable slips by a quarter.
The cast of a typical deal includes the lead underwriter, usually one of the big securities houses such as Korea Investment & Securities, Mirae Asset or NH Investment & Securities, plus an audit firm, a law firm and, for KOSDAQ tech deals, a designated technology evaluation agency. Choosing the lead manager early matters, because the underwriter effectively project-manages everything that follows.
Stage one: preparation and due diligence
The first six months go to housekeeping. The company adopts K-IFRS accounting, commissions two to three years of audited statements, cleans up its cap table and resolves related-party transactions that would embarrass it in a prospectus. Companies with convertible notes or stock options granted cheaply to founders spend real time here, because the exchange scrutinises anything that diluted early investors unfairly.
For KOSDAQ technology listings there is an extra gate: two accredited evaluation agencies must each grade the company's technology, and the standard A and BBB combination is required to proceed on the special tech track. Biotech firms plan clinical milestones around this assessment, because the evaluators weigh pipeline credibility heavily.
Stage two: exchange review and filing
The preliminary listing review at the Korea Exchange runs about 45 business days for KOSDAQ and longer for KOSPI. Reviewers dig into business sustainability, governance and the largest shareholder's history. A controlling shareholder with past tax or legal trouble can sink an application at this stage, and Korean business media track such cases closely.
Once the exchange approves, the company files a securities registration statement with the Financial Supervisory Service. The filing becomes effective after a review period, typically fifteen days, and only then can formal marketing to investors begin. The demand forecast, Korea's bookbuilding, follows: institutional investors submit bids over two days, and the final price is set within the resulting band.
| Stage | Typical duration | Key player |
|---|---|---|
| Preparation and audit | 6–9 months | Underwriter, audit firm |
| Technology evaluation (KOSDAQ tech track) | 2–3 months | Designated evaluation agencies |
| Exchange preliminary review | ~45 business days | Korea Exchange |
| FSS filing and effectiveness | 2–4 weeks | Financial Supervisory Service |
| Bookbuilding and pricing | 2 weeks | Lead manager, institutions |
Pricing, allocation and the first day
Korean retail demand can be ferocious. Hot deals draw trillions of won in subscription deposits, and since the 2021 equal-allocation reform, a share of the retail tranche is distributed evenly among subscribers rather than purely pro-rata. Underwriters hold a mandatory lock-up, typically one to six months for major shareholders, to prevent an immediate dump.
The debut itself is capped: price limits of 60 to 400 percent of the offering price apply on day one under rules introduced after chaotic debuts in past years. A strong first day still matters symbolically in Korea, and a weak one triggers instant press post-mortems. Companies that clear the whole gauntlet join a market that adds dozens of new listings a year, most of them on KOSDAQ.
What founders underestimate
- The timetable slips most often during audit preparation, not during the exchange review.
- Largest-shareholder issues, old loans, dubious share transfers, kill more deals than weak revenue.
- Retail sentiment, not just institutional pricing, shapes the final valuation in Korea.
- Post-listing obligations, quarterly disclosure and IR, need budget from day one.
Done well, the process is demanding but predictable. The Korean market rewards preparation: companies that arrive with clean books and a credible story move through the pipeline on schedule, and the domestic investor base, retail and institutional alike, remains one of the most receptive in Asia for growth stories.