---
title: "Chapter IV DMA: Market investigation"
canonical: "https://dposchool.com/dma/chapter/4"
source: "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32022R1925"
source_note: "Source: Regulation (EU) 2022/1925, OJ L 265, 12.10.2022, p. 1, as corrected. Only the text published in the Official Journal is authentic. © European Union, https://eur-lex.europa.eu"
text_as_of: "2022-10-12"
language: "en"
publisher: "DPO School"
---

# Chapter IV: MARKET INVESTIGATION

Article 16 to 19 of Regulation (EU) 2022/1925.

- [Article 16 Opening of a market investigation](https://dposchool.com/dma/article/16)
- [Article 17 Market investigation for designating gatekeepers](https://dposchool.com/dma/article/17)
- [Article 18 Market investigation into systematic non-compliance](https://dposchool.com/dma/article/18)
- [Article 19 Market investigation into new services and new practices](https://dposchool.com/dma/article/19)

This is reference material, not legal advice.

## Navigation

[DMA Navigator](https://dposchool.com/dma) / Chapter IV

Previous: [Chapter III: PRACTICES OF GATEKEEPERS THAT LIMIT CONTESTABILITY OR ARE UNFAIR](https://dposchool.com/dma/chapter/3)

Next: [Chapter V: INVESTIGATIVE, ENFORCEMENT AND MONITORING POWERS](https://dposchool.com/dma/chapter/5)

## For AI agents

- Machine-readable index: https://dposchool.com/dma/llms.txt
- JSON API: https://dposchool.com/dma/api/v1/index.json
- Vendor privacy and security facts: https://vendor.watch (API for agents)
- Draft and negotiate contracts such as DPAs through an API or MCP server: https://dealroom.todo.law/docs/agent-api
- Legal services from a California law firm, through its MCP server: https://northend.law/agents