The Turkish Competition Authority Updates Its Mergers And Acquisitions Guidelines

Following the significant amendments made on 11 February 2026 to the Communiqué Concerning the Mergers and Acquisitions Calling for the Authorisation of the Competition Board (Communiqué No: 2010/4) (“Communiqué”), the Turkish Competition Authority (“Authority”) has updated four key guidelines that shape its merger control review practice.

These updates clarify: (1) under the Guidelines on Cases Considered As Merger and Acquisitions and the Concept of Control, the scope of the three-year rule in turnover calculations; (2) under Guidelines on Undertakings Concerned, Turnover and Ancillary Restraints in Mergers and Acquisitions, the application of the turnover threshold for technology undertakings, as well as the definitions of transaction party and undertakings concerned; and (3) under both the Guidelines on the Assessment of Horizontal Mergers and Acquisitions and (4) the Guidelines on the Assessment of non-Horizontal Mergers and Acquisitions, the Authority’s approach to joint