Borsa Istanbul Daily Company News and Share Trading Updates

Borsa İstanbul marked a new listing on April 9, 2026, as the opening bell rang for Ağaoğlu GYO. This event follows a period of significant listing activity on the exchange, with 14 companies going public during the first quarter of 2026.

The April 9 listing is part of a broader trend of corporate entries into the market seen throughout February and March 2026. Other companies that held opening bell ceremonies during this period include:

• Metropal Kurumsal Hizmetler A.Ş. On March 11, 2026
• Luxera Gayrimenkul Yatırım Ortaklığı A.Ş. On March 10, 2026
• Gentaş Kimya Sanayi ve Ticaret Pazarlama A.Ş. On March 6, 2026
• Empa Elektronik Sanayi ve Ticaret A.Ş. On February 26, 2026

Regulatory and Index Adjustments

Alongside new listings, Borsa İstanbul implemented several structural and regulatory changes during the first quarter and early second quarter of 2026. On March 19, 2026, the exchange announced constituent changes to the BIST Stock Indices for the second quarter of 2026.

On the same date, March 19, 2026, the exchange performed a re-determination of the market segments for shares within the BIST Stars, BIST Main, and BIST SubMarket. Borsa İstanbul announced an update to the LSEG Sustainability Methodology and the implementation of its transition process on March 19, 2026.

Technical adjustments to market operations were also introduced. On March 1, 2026, the exchange implemented a change in the Order-to-Trade Ratio (OTR) specifically for the Equity Market.

Debt Securities and Market Procedures

Borsa İstanbul has updated several procedural frameworks governing its various markets. On March 31, 2026, the exchange issued an announcement regarding amendments to the Debt Securities Market Procedure.

This followed an earlier set of amendments announced on March 4, 2026, which affected both the Debt Securities Market and the Borsa İstanbul Money Market Procedures. On April 3, 2026, the exchange released an announcement concerning the procedure for theoretical and reference price calculations in instances of corporate actions.

Periodic Index Reviews

The exchange has maintained a schedule of periodic reviews for its specialized indices. The BIST Buyback Index underwent periodic reviews on both March 4, 2026, and April 3, 2026.

Other index reviews conducted during this period include:

• BIST-KYD Fund Indices Periodic Review on March 26, 2026
• BIST-KYD Corporate Eurobond Indices Periodic Review on March 26, 2026