The Philippine Stock Exchange (PSE) has imposed a sanction on STI Education Systems Holdings Inc. (STI) for violating disclosure requirements under its Consolidated Listing and Disclosure Rules.

In a notice dated 13 February 2026, the Exchange said STI was found to have breached Section 13.1(c), Article VII of the Rules, which governs the timely reporting of certain share transactions.

Under the provision, listed companies are required to disclose acquisitions, disposals or changes in shareholdings of directors and principal officers within five trading days from the transaction date.

The PSE did not disclose the specific transaction that led to the penalty, nor did it state the amount of the fine imposed on the listed education firm.

Public records show that in 2025, STI and related parties reported several significant share transactions. Among them were the purchase of 10 million STI shares on 22 September at P1.42 per share, disclosed the following day, as well as the sale of 100 million shares at P1.50 on 5 December, disclosed on 9 December, and another 80.9 million shares at the same price on 12 December, reported on 15 December.

The Exchange also did not indicate whether additional sanctions would be imposed.

The disclosure forms part of the PSE’s regular publication of penalties assessed against listed companies for failure to comply with reporting and disclosure obligations.