DMA investigations

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This Overview guides practitioners to materials on investigations under the EU Digital Markets Act (DMA), with links to analysis, procedure and key documents.

DMA investigations sit at the centre of the regime established by Regulation (EU) 2022/1925, with the European Commission holding exclusive enforcement powers. Investigations can address gatekeeper designation and scope of core platform services, compliance with Articles 5–7 obligations, suspected non‑compliance, and systematic non‑compliance leading to behavioural or structural remedies. Sanctions are available, including fines of up to 10% of worldwide turnover (20% for repeated infringements) and periodic penalty payments.

Practitioners should understand investigative tools and process: requests for information, interviews, and on‑site inspections; opening of proceedings; interim measures; access to file; confidentiality and legal professional privilege; and the preparation of compliance reports and technical documentation. Managing tight deadlines, data preservation, governance, and coordination across multiple jurisdictions are critical, particularly where DMA inquiries intersect with antitrust, consumer protection or data protection rules. National authorities may assist the Commission, but enforcement decisions rest with the Commission and are subject to judicial review before the EU Courts.

Recent enforcement activity has focused on app store rules, self‑preferencing, steering...

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