TBS Energi Utama is trading 7.19% higher at IDR 358.00, with the HPS investment announcement a plausible catalyst. - HPS Investment Partners, part of BlackRock, announced a staged investment of up to S$555 million in TBS’s waste-management platform to support expansion across Asia. - The announcement was made after the October 21, 2026 session and reported the following day; shareholder approval is still required. - Reporting does not explicitly confirm the news caused the October 22 gain.