Insights and Analysis

Merger, she wrote (Part 4): The verdict – What the guidelines mean for merging parties

14 May 2026

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Insights and Analysis

Merger, she wrote (Part 4): The verdict – What the guidelines mean for merging parties

Key takeaways

In the finale of our four-part series we wrap our review of the draft EU Merger Guidelines by summarizing what the Commission's new guidance means for M&A activity in the EU – from document handling to authority engagement, from theories of harm analysis to arguing efficiencies and using the new Innovation Shield. Dealmakers must plan ahead as things will move quickly. The Commission's consultation closes next month (26 June 2026) and adoption is targeted by year-end already.

Parts 1, 2 and 3 of this series traced the 30 April draft from political mandate to operative text. Part 1 set out the path from the Draghi report through Executive Vice-President Ribera's mission letter to the published draft, and the new vocabulary of pro-competitive scale that mandate produced. Part 2 walked through the analytical framework the draft now puts in the Commission's hands: the holistic market power assessment, the eight theories of harm, and the Innovation Shield. Part 3 looked at the defense side, and how parties can counter potential interventions in their merger plans: pleading efficiencies, now reorganized along a direct/dynamic split, and balancing them against any purported harm; and fending off additional Member State interventions by relying on the Commission's now rather critical view of excessive use of those powers under Article 21 EUMR. Part 4 ties this all together and shows what the draft means for the parties that will live under it.

Chapter 1 The case so far – What the jury has seen...

To recap the series: Part 1 traced the political and intellectual chain that produced the 30 April draft – Draghi's diagnosis, EU Commission President von der Leyen's mission letter to Competition Commissioner Ribera, the Competitiveness Compass, the Clean Industrial Deal, and a year of consultation – and the negotiation visible in the draft's prose. While the published text leans into a new vocabulary of pro-competitive scale rather than a softening of the SIEC test, one structural change stands out: the Commission has formally given itself a theory of benefit to mirror its theory of harm, with the same evidentiary discipline applied to both (and the more likely than not standard from CK Telecoms written into the text), no hierarchy between qualitative and quantitative evidence, and pre-notification engagement on benefits expressly welcomed.

Part 2 turned to the analytical machinery that will now decide cases. The market power assessment goes beyond market shares: structural indicators remain the starting point, but dynamic competitive potential carries its own analytical weight. The eight-theory taxonomy of harm retires the horizontal/non-horizontal architecture and adds chapters that were not there before – investment and expansion competition as a standalone theory, innovation competition in specific and general registers, entrenchment, commercially sensitive information as a standalone harm, labour market monopsony, diagonal mergers, and a tightened structural-deterrence test for coordination – tripling the failure modes a notification needs to anticipate. The much-discussed Innovation Shield closes the analytical chapter with a structured anchor for pre-notification engagement: five mapped scenarios, three context-dependent numeric thresholds (a 40% market share cap, three independent R&D competitors, and 25% combined R&D at industry level), and a tougher stance on acquisitions by DMA gatekeepers than the leaked draft had anticipated.

Part 3 examined how parties can now defend their transactions against intervention by authorities: by arguing efficiencies and relying on the ceiling the Commission draws around Member State intervention once Brussels has cleared. The architecture for efficiencies has been redrawn. While the threefold cumulative test remains in place, the direct/dynamic split, the framing paragraph elevating scale, resilience, and sustainability as potential consumer benefits, and the seven-category direct and eight-category dynamic synergy taxonomies are new, with some room for out-of-market and collective benefits to be acknowledged as well. Article 21 EUMR, in turn, receives its most detailed institutional treatment in twenty years, with public security construed strictly, media plurality given a freestanding definition, prudential rules tightly framed by harmonized EU financial-services law, de facto binding measures caught alongside outright prohibitions, and a compatibility presumption (only!) for measures aligned with EU-level coordination instruments.

Chapter 2 How to rule – what the guidelines mean for merger parties

Two camps have shaped the reform debate for years: one championing competition – traditional competition policy – and one championing competitiveness, a beast of its own with read-across to classic industrial policy. Both have left their mark on the published text, with the Berlaymont's two leading figures each anchoring one camp: Commissioner Ribera the competition-policy line from DG COMP, President von der Leyen the competitiveness case from the political center. So in the end she “wrote merger”. But so did she. The result is a complex, multi-faceted rulebook that parties must adapt to – and can also leverage to their advantage. Initial key lessons include:

Read the draft as a structural reframing. Pre-screening theories of harm by transaction type – a habit invited by the old merger guidelines – ignores the consolidated taxonomy that now applies in principle to every merger. Parties must brace themselves for more complex reviews that go beyond established playbooks. At the same time, this added complexity creates greater leeway for novel counter-arguments in defense of a merger, particularly on efficiencies and the wider benefits a transaction may deliver in terms of scale and the other objectives the Commission now attributes to the role and purpose of EU merger control.
Build the theory of benefit into deal planning from the outset. The rigid two-year materialization horizon under the 2004 framework is gone; dynamic efficiencies can land on a longer timeline, scaled to the market and the theory of harm in play – the change that capital-intensive sectors (defense, energy, telecoms, infrastructure) have been waiting for. Internal documents can support that case, as can carefully modelled synergy plans.
Generally, curate contemporaneous internal documents. More than ever, they are the spine of the file: synergy plans, integration roadmaps, and procurement analyses for direct efficiencies; investor communications and R&D pipelines for dynamic efficiencies; and ability-versus-incentive substantiation for innovation claims. It is equally important to keep all language clear and truthful and to avoid bloated or misleading vocabulary, as the Commission will assign high evidentiary value to contemporaneous internal documents when assessing any theory of benefit or harm.
Anchor scale, resilience, and sustainability claims in the right channels. Security of supply, broader infrastructure, reduced exposure to disruptions, and purchasing power over critical inputs; reductions in production-related pollution, improved access to sustainable inputs, and new or improved sustainable products. The handles the draft provides are concrete and call for specific analysis; parties who instead reach for generalized policy advantages will find themselves hard-pressed to convince the Commission.
Use security of supply as both a ‘closeness of competition’ factor and a benefit channel. The parameter cuts both ways. On the harm side, the loss of a supply-secure rival is a competitive concern; on the benefit side, a merger that strengthens supply security relative to rivals enhances the competitive constraint customers face. Parties should plan for both readings.
Map the transaction against the right Innovation Shield scenario, with the right thresholds. The Innovation Shield can deliver much-desired deal certainty for transactions in an “innovation space”, even where the acquirer is a gatekeeper. However, the Guidelines lay out an intricate grid of scenarios and conditions, and only mapping a deal against the right scenario will de-risk the process and shorten timelines as intended.
Be mindful of “novel harm angles” on every R&D-heavy or platform-adjacent transaction. For all its modernization, the Guidelines give the Commission ample room to challenge a merger. Loss of investment and expansion competition turns on the change in incentive itself, regardless of whether the merged entity proceeds with all pre-merger plans. General innovation competition has become the formal home for killer-acquisition concerns, entrenchment as a theory of harm can land without a foreclosure finding behind it, and access to commercially sensitive information can also spell trouble. Labor market monopsony has entered the guidance in a way that will draw a wider third-party stakeholder universe, especially in transactions involving specialized workforces with limited alternative employers.
Leverage Article 21 where necessary. While not everyday merger control business, recent years have seen cases in which Member State intervention heavily interfered with the outcome of transactions falling solely within the Commission’s merger control jurisdiction. Going forward, merger parties may find some empowerment in the Commission’s guidance on the limits of Member State intervention, which provides a useful playbook for pushing back.
Track the consultation calendar and read the September dynamic-effects study against the dynamic-efficiencies framework. The consultation closes at the end of June, with a stakeholder workshop earlier that month and a Commission-funded economic study on the dynamic effects of mergers due in September. Assuming much of that study carries over into the Commission’s handling of efficiencies, parties seeking to advance dynamic-efficiency arguments will gain important additional insights when it lands.

Adoption of the new Guidelines is targeted for year-end, but the Commission can be expected to begin reflecting the draft in decisional practice immediately, well before any Q4 adoption signal. Recent events appear to confirm that the framework is, at least to some extent, already operative. Two days before the published text appeared, the Commission noted in a press release that the case team in Airbus/Air France A350 components JV (M.11295, 28 April 2026) engaged with the parties' efficiency claims at Phase I (despite the deal clearing unconditionally and no in-depth review being required), framing the engagement as an opportunity to assess plausibility and provide guidance.

So while accepting that the Guidelines’ final version after consultation may shift in detail, the architecture appears settled enough for merger parties to plan against. The time to act is now.

Authored by Falk Schöning and Florian von Schreitter.