PT Kustodian Sentral Efek Indonesia (KSEI) is a prominent institution in the Indonesian capital market, established on December 23, 1997. As a self-regulatory organization, KSEI plays a critical role in providing central custodian services and transaction settlement that adhere to legal standards, specifically the Capital Market Law No. 8/1995. Since commencing operations in 1998, KSEI has been integral in advancing the market by facilitating scripless trading through its groundbreaking Central Depository and Book Entry Settlement System (C-BEST).

KSEI offers a variety of services, including the management of investor identities through the Single Investor Identification (SID), and a comprehensive investment management platform known as S-INVEST. The organization is dedicated to improving market trust and expanding the investor base in Indonesia. KSEI's continuous technological innovations, notably the Next Generation C-BEST, demonstrate its commitment to supporting market development and enhancing operational efficiency. With a focus on sustainable growth, KSEI consistently aligns its initiatives with industry trends and stakeholder needs, solidifying its reputation as a leader in the Southeast Asian capital markets.