Europe's New Merger Playbook: Evolution or Revolution?

On 30 April 2026, the European Commission published its long-awaited draft merger guidelines, opening a public consultation that will run until 26 June 2026. Once formally adopted (likely in late 2026) these Guidelines will replace the existing guidance dating from 2004 and 2008 with a single, consolidated document. In line with the Draghi Report recommendations, the draft marks the most significant rethink of EU merger control in two decades. 

What Guidelines Mean in Practice 

For those unfamiliar with EU merger control: when companies plan to merge, they must notify the Commission (provided certain turnover thresholds are met), which then decides whether the transaction may proceed unconditionally, may proceed subject to conditions, or must be prohibited. The legal test is whether the transaction would significantly impede effective competition, for example, by raising prices, reducing quality or stifling innovation.

How that assessment is carried out is governed by principles established in law and economic theory, compiled in "soft law" instruments such as guidelines. The guidelines function as an explanatory manual, setting out how the Commission analyses deals in practice. In practice, they end up looking a bit like "hard laws", under the careful eye of the Court of justice of the EU.

Guidelines serve important functions. First, they provide legal certainty: companies contemplating a merger need to know in advance which analytical standards will apply, and guidelines are the Commission’s principal means of communicating them. Second, they consolidate the applicable EU case law, translating court rulings into operational guidance for practitioners. Third, the Commission cannot depart from its own guidelines without solid justification, a principle upheld by the EU courts. Guidelines, although formally non-binding, carry real legal weight in practice.

Why Now?

The political catalyst for reform is often identified as the Commission's February 2019 decision to block the Siemens/Alstom rail merger. France and Germany had backed the deal as a European answer to Chinese competition, but the Commission concluded it would raise prices for European customers and that market entry from outside the EU was not foreseeable.
 

But the decision exposed a deep-rooted fault line in European economic policy. France, Germany and sixteen other governments published a "Manifesto for a European Industrial Policy fit for the 21st Century", calling for merger rules that accommodate global competition and even a Council right to override the Commission.

That view was (and still is) far from universal. In 2020, The Netherlands, Ireland, the Nordic and Baltic states and several Central European governments pushed back, warning that politicizing merger review would undermine the single market and insisting that any review must be "based on proven principles, evidence and economic research". These countries have traditionally been wary of being dwarfed by large industrial groups, see in the "European champions" agenda a risk that relaxed merger rules would produce dominant suppliers capable of dictating terms to smaller customers and Member States alike.

Evolution or Revolution?
 

The honest answer is: evolution, though a meaningful one. The core legal standard is unchanged - the Commission must still demonstrate that a deal significantly impedes competition before it can block it or impose conditions. High market shares and market power will continue to attract scrutiny. As Commissioner Ribera has emphasised, "if anyone thought that this call for the creation of champions was an argument to deregulate, dismantle or reduce safeguards, they are mistaken".

But within that legal framework, the Guidelines genuinely break new ground by creating avenues for companies to make positive arguments in favor of their deal. 

• The most significant innovation is a formal "theory of benefit" framework, inviting merging parties to show - with hard evidence - how a transaction will deliver concrete gains such as lower costs, better products, and greater capacity to invest and innovate. Efficiency arguments have historically been a near-impossible hurdle in Brussels, but the Commission is now signaling that well-evidenced benefits should be raised early and taken seriously. 
• The Guidelines also expressly recognize that scaling up within the internal market to compete globally "can be procompetitive and have a positive impact on the EU economy and its competitiveness", though the benefits of scale must still be distinguished from simply amassing market power that would harm European consumers through higher prices or less choice.
• Other developments reflect a broader rethink of competition policy in the current geopolitical moment. The Guidelines introduce "dynamic competitive potential" as a concept, meaning that the Commission will look beyond a company's current market share to assess its significance through factors like R&D spending, patent portfolios, and pipeline products. 
• Consumer benefits are broadened beyond price and quality to include resilience and sustainability, and an "innovation shield" creates a rebuttable presumption against blocking certain acquisitions of start-ups and small innovators - a welcome signal for early-stage tech and life sciences transactions.
   

But the reform is not a one-way street. The Guidelines also significantly sharpen the Commission's enforcement toolkit in new areas. Portfolio effects - where a company assembles products from different markets to increase its bargaining leverage over customers (for example, a supplier of a must-have branded drink acquiring a producer of snacks, so that supermarkets feel compelled to stock both) - receive standalone treatment for the first time. A range of non-price concerns are also elevated: the impact of mergers on labour markets and wages, access to commercially sensitive data, and the risk that algorithmic pricing tools could facilitate coordination between competitors. The Commission's menu of reasons to challenge a deal has grown considerably.

What Comes Next

The Commission has opened new doors for arguing that a deal is good for Europe - efficiencies, scale, resilience, sustainability - but only well-evidenced cases built from the earliest stages of deal planning will succeed. Equally, novel grounds for challenge such as portfolio leverage, labour market effects, data access and algorithmic coordination must be anticipated early.

More broadly, the Guidelines raise the question of what kind of economy Europe wants. They are the Commission’s attempt to translate the Draghi and Letta calls for greater scale and sovereignty into an operational framework, without abandoning the consumer protection logic that has underpinned EU merger control for thirty years. 

Whether this recalibration genuinely alters outcomes will be proved not in the text of the Guidelines but in the Commission's decisional practice in the years ahead - with early test cases likely to arise in defence, telecoms consolidation and AI/cloud transactions, where the new "theory of benefit" and "dynamic competitive potential" frameworks will first be stress-tested.

Copyright image : Kirill KUDRYAVTSEV / AFP