A Seoul court has detained two current and former petrochemical executives while rejecting arrest warrants for six others in a price-fixing investigation that spans seven major companies. The rulings came after warrant hearings on Friday and create the first custody decisions in a case prosecutors say concerns coordinated price increases across eight petrochemical products. The court said there was concern that evidence could be destroyed in the cases of the two detained executives. For several of the others, it cited the need to preserve their right to defend themselves and, in some instances, said the allegations had not been sufficiently established to justify detention.
The investigation centers on allegations that LG Chem, Hanwha Solutions, Aekyung Chemical, OCI, Lotte Fine Chemical, PKC and Unid coordinated prices over several years for products including PVC, plasticizers, caustic soda and hydrochloric acid. Prosecutors have described the suspected conduct as involving a market worth about 15 trillion won and alleged that the companies took advantage of disruptions in naphtha supply during the Middle East conflict. Those claims remain allegations. The warrant decisions determine whether individual suspects should be held during the investigation; they are not findings of guilt.
- Warrants
- 2 approved, 6 rejected
- Companies in the allegation
- 7
- Products cited
- 8 petrochemical products
A split ruling, not a verdict
The split result matters because it leaves the investigation moving on two tracks. The prosecution now has two suspects in custody, which can make questioning and evidence preservation easier, while six others remain free to contest the case. The court's explanations also show that the evidentiary picture is not uniform across the eight executives. In some cases it accepted the risk of evidence destruction as sufficient for detention, while in others it found the showing too weak or the need for custody insufficient.
That distinction is especially important in a competition-law case built around alleged coordination over years rather than a single transaction. Investigators will need to connect communications, pricing decisions and corporate conduct to specific individuals and companies. A large headline figure does not resolve those questions by itself. The central legal issue is whether prosecutors can show an agreement or coordinated practice that crossed the line from parallel commercial behavior into unlawful collusion.
From custody decisions to the evidence
The case also reaches beyond the executives named in the warrant hearings. PVC and related chemicals are basic industrial inputs used in construction materials, pipes, wire coatings and manufacturing. If prosecutors establish that prices were coordinated across several suppliers, the effects could have extended through downstream businesses that buy those materials. That broader economic consequence is one reason the investigation has drawn attention beyond the companies directly involved.
Prosecutors began compulsory investigative steps in August with searches of the companies and later questioned senior executives. The latest detention decisions are therefore a development inside an existing investigation, not the beginning of the case. The next phase is likely to focus on documentary and digital evidence, the role attributed to individual executives and whether prosecutors bring indictments against some or all of the suspects.
For the six people whose warrants were rejected, the investigation continues. A rejected detention request does not end a criminal inquiry or clear a suspect of the allegations. It means the court did not find pretrial custody justified on the record presented at the warrant stage. The prosecution can continue gathering evidence and, depending on what it finds, can later decide whether to seek indictments without detention or pursue other procedural steps.
The investigation could now expand into a wider examination of alleged industry-wide collusion. The size of the market, the number of companies and the importance of the products make the case consequential, but its final significance will depend on evidence that can be tied to specific conduct. The next meaningful signals will be formal charges, any additional warrant requests and the competition-law evidence prosecutors disclose as the case advances.