Indonesia Exchange to Tag 300 More Stocks for High Shareholder Concentration

What changed

Indonesia Stock Exchange Chief Executive Jeffrey Hendrik said late Tuesday the bourse will expand its high concentration list to improve transparency. Along with removing the old 5 trillion rupiah size requirement, the exchange will flag issuers when 10 or fewer investors collectively control at least 92.5% of shares.

It also will no longer use the price impact ratio, a measure of how much a stock moves relative to its trading activity, to determine inclusion.

Who is affected

Those 300 names represent roughly 6.16% of the Jakarta Composite Index's market capitalization and will join the 83 firms already included. Any firm placed on the list comes out of both MSCI indexes and the JCI, and can only exit after companies and shareholders sell stock to the public through trades in the regular market.

Why it matters for investors

Officials framed the step as part of a broader push to avoid a potential double downgrade by MSCI after last month's warning about opaque ownership and coordinated trading. Citigroup analysts, including Ferry Wong, called recent actions "decent," but added that "more efforts are likely needed to avoid downgrade."

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Authorities have recently fined manipulative market practices and promised firm enforcement. That urgency sits alongside months of foreign outflows and a benchmark that has fallen more than 40% this year, with the JCI down 0.2% on Wednesday. The bottom line: index eligibility and passive flows can shift as more companies fall outside MSCI and the local benchmark, making transparency screens and enforcement follow-through key signals for your portfolio.

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