Brussels: The European Commission is rewriting the merger guidelines that govern how it clears or blocks corporate deals, launching the biggest overhaul of EU merger control in over twenty years and setting off a fierce debate about how far Europe should let its champions grow.

The Commission published its draft merger guidelines on 30 April 2026 and ran a public consultation until 26 June, with final adoption expected before the end of the year. The text folds the horizontal rules from 2004 and the non-horizontal rules from 2008 into a single, modernised framework.

At the heart of the revision sits a new emphasis on competitiveness, resilience, and security. Executive Vice-President Teresa Ribera has steered the merger guidelines to reflect the Draghi report’s warning that fragmented European firms struggle to match American and Chinese rivals. The draft asks the Commission to weigh innovation and scale, not just price and market share.

Companies and their lawyers see opportunity. The revised framework gives merging parties fresh arguments about efficiencies, dynamic competition, and the strategic value of building European scale. Business groups have long complained that Brussels blocked tie-ups that could have created global players, pointing to the collapsed Siemens-Alstom rail deal as a cautionary tale.

Critics fear a loophole. Analysts at the think tank Bruegel warn that vague appeals to “efficiency” and “dynamic efficiencies” could hand dominant firms a licence to swallow smaller challengers, precisely the kind of consolidation that hollows out competition over time. The concern lands hardest in the digital sector, where a handful of platforms already tower over the single market.

Ribera has pushed back on the idea that the new merger guidelines amount to a giveaway. In public remarks she insisted the text is no “blank cheque” for dealmakers and that the Commission will not wave through mergers built on “wishful thinking” about future gains. The final wording, she suggests, will keep the burden on companies to prove their claims.

The stakes reach well beyond legal drafting. Brussels is simultaneously advancing a tech sovereignty agenda meant to cut Europe’s reliance on US suppliers. Competition experts argue the two efforts must move together, because a lighter merger touch could let entrenched incumbents buy up the very European startups the sovereignty push aims to nurture.

The full draft and the consultation responses sit on the Commission’s competition policy pages, where stakeholders from law firms to consumer groups have filed sharply divergent views.

When the final merger guidelines land in the autumn, they will shape a decade of dealmaking across energy, telecoms, banking, and technology. The Commission must decide whether Europe’s answer to global rivalry is bigger firms or fiercer competition, and the balance it strikes will echo through boardrooms far beyond Brussels.