Istanbul Stock Exchange Highlights: December 10, 2025

December 10, 2025: Developments of the Day at Borsa İstanbul

As of December 10, 2025, we have compiled the prominent developments at Borsa İstanbul for you. Many companies have made significant moves to attract investors' attention.

Sasa Polyester (SASA)

Sasa Polyester announced that it sold 18,000,000 shares equivalent to 0.04% of its stake, owned by Erdemoğlu Holding, to a globally recognized investment organization abroad and a domestic institutional investor at a price of 2.92 TL per share. All revenues from this transaction will be used to meet the company’s financing needs.

Yeo Technology (YEOTK)

Yeo Technology announced that its fully owned subsidiary Reap Battery has started the production of Lithium Iron Phosphate (LFP) based energy storage systems at its facilities in Tuzla, Istanbul. This investment has been made as an important step to meet the growing demand for renewable energy solutions.

Oncosem Oncology Systems (ONCSM)

Oncosem won an important business by submitting the most advantageous bid at 47 million TL for the “3-Year Chemotherapy Drug Preparation Service” tender conducted by Bursa City Hospital. This tender supports the company’s future growth potential.

Aksa Energy (AKSEN)

Aksa Energy announced that the Electricity Production License application for the Alıç Storage GES Project has been approved by the EPDK. This development is an important step taken to strengthen Aksa’s growth targets in energy production.

VBT Software (VBTYZ)

VBT Software announced that Neo Portfolio Management has decided to invest a total of 16 million TL in the VBT Software Venture Capital Investment Fund to support start-up initiatives. This investment provides a significant resource for the company to realize its innovative projects.

Global Market Situation

In global markets, uncertainties regarding the Federal Reserve's (Fed) interest rate decision continue, while divisions have emerged among some Fed officials. This situation has led to a mixed market sentiment as investors decrease their risk appetite.

Developments in the Turkish Economy

At Borsa İstanbul, the BIST 100 index started the day with an increase of 0.31%, reaching 11,273.34 points. The dollar is trading at 42.59 TL, while the euro is at 49.57 TL, with gram gold priced at 5,759 TL and ounce gold at 4,205 dollars.

There are no companies making dividend payments today. On the other hand, it is noted that the announcement of the Fed Interest Rate Decision is significant on the economic calendar.