Confidence in Thailand's capital market has been shaken again after the name of an obscure individual, Supaporn Phimpong, appeared in Securities and Exchange Commission (SEC) filings as the reported owner of a 7% stake in True Corporation. True executives said they were unaware of such a shareholder.
Further scrutiny revealed the individual had also filed reports claiming substantial stakes in several other blue-chip companies, including Bangkok Bank, Kasikornbank, Major Cineplex, Asia Aviation and GJ Steel, with a combined value of billions of baht.
Some filings related to transactions dating back several years but were submitted only recently. The SEC has since removed the disclosures and launched an investigation.
Ms Supaporn told police yesterday she did not own the shares and said she had submitted the information by mistake.
The SEC has defended its electronic disclosure platform, saying it operates under a self-reporting framework -- an internationally accepted practice that allows investors to receive market-sensitive information promptly.
That explanation, however, addresses only part of the issue. The more important question is how the regulator verifies information submitted through the system.
Ms Supaporn's case was not an isolated filing involving a single company. It spanned multiple listed firms, included claims of extraordinarily large shareholdings worth billions of baht and, in some instances, involved transactions reported years after they allegedly occurred. Whether the filings resulted from error or deliberate misconduct, the SEC must explain why its system failed to flag such obvious anomalies.
No regulator can realistically scrutinise every disclosure before publication. However, investors are entitled to expect that the market watchdog can identify clear warning signs, such as unusually large holdings, repeated filings across multiple companies and submissions made years after the reported transactions.
A regulator's responsibility does not end with making information public. It also has a duty to ensure investors can place reasonable confidence in the integrity of that information. Transparency has little value if the information disclosed cannot be trusted.
Digital transformation is about more than replacing paper forms with electronic submissions. It should strengthen the disclosure process itself. Technology capable of identifying unusual patterns, late filings and obvious inconsistencies already exists. The challenge is making those safeguards an integral part of regulatory oversight rather than an afterthought.
The SEC has promised to strengthen its verification procedures. That commitment is welcome, but it must be backed by meaningful reform.
Investors deserve more than assurances that the disclosure system follows international practice. They deserve confidence that obvious irregularities will be detected before they appear on an official regulatory platform.
Adhering to international practice should be the starting point, not the finish line. The SEC should introduce risk-based validation, automated anomaly detection and stronger safeguards for unusually late or suspicious filings. Market confidence depends not only on how quickly information is disclosed, but also on whether investors can trust what appears on the regulator's platform.
