The German government has formally rejected UniCredit’s public exchange offer for Commerzbank, dealing a sharp blow to the Italian lender’s months-long pursuit of a controlling stake in the country’s fourth-largest bank. In a statement released on Tuesday, Berlin’s interministerial committee overseeing the Financial Market Stabilisation Fund (SoFFin) declared the bid “economically out of the question,” pointing to the absence of an adequate premium over Commerzbank’s current share price and what it described as an “aggressive approach” by UniCredit. The state holds a 12 per cent stake in Commerzbank, a legacy of the 2008 financial crisis bailout, and its refusal to tender those shares effectively blocks the Milan-based group from reaching a majority through the voluntary exchange offer alone.

The rejection underscores Berlin’s determination to preserve Commerzbank’s independence, a stance rooted in the bank’s role as a key financier of Germany’s Mittelstand—the small and medium-sized enterprises that form the backbone of Europe’s largest economy—and as a major employer in Frankfurt’s financial district. Viewed from Berlin, the proposed tie-up with UniCredit is not merely a commercial transaction but a threat to a strategic pillar of national economic infrastructure. The German finance agency’s statement emphasised that the offer “was already not an option financially,” reflecting a political calculus that extends well beyond the current share price.

The rejection came on the final day of UniCredit’s exchange offer, even as market dynamics shifted in the Italian bank’s favour. Commerzbank shares slipped to €36.60, falling below the implied value of UniCredit’s offer—0.485 of its own shares for each Commerzbank share, worth roughly €37.25 at prevailing prices. For other shareholders, the offer had become marginally attractive, yet Berlin’s stance remained unchanged. Meanwhile, UniCredit has continued to build its economic exposure, which now stands at 41.9 per cent of Commerzbank, including derivatives, with acceptances under the offer reaching 11.91 per cent. The group’s CEO, Andrea Orcel, has signalled his intention to pursue a full takeover, but without the state’s shares, the path to a majority becomes far more complex.

Adding to the uncertainty, Frankfurt prosecutors have opened a preliminary investigation into possible market manipulation in connection with UniCredit’s bid, following a complaint by Commerzbank’s works council. The probe, while at an early stage, introduces a legal dimension that could delay or complicate any further moves. From Milan, the investigation is seen as a predictable defensive tactic by stakeholders hostile to the deal, but it nonetheless raises the stakes in a battle that has already drawn in politicians, regulators and labour representatives on both sides of the Alps.

The stand-off over Commerzbank is emerging as a test case for cross-border banking consolidation in Europe. Analysts in London note that while the commercial logic of a UniCredit-Commerzbank combination is compelling—creating a pan-European heavyweight with deep roots in Germany and Italy—the political resistance in Berlin highlights the enduring power of national interests over market forces. With the European Central Bank and Germany’s BaFin yet to weigh in on any potential full takeover, and the Frankfurt investigation adding a fresh layer of scrutiny, the saga is far from over. UniCredit may yet seek to build a creeping stake or launch a hostile bid, but for now, the message from Berlin is unequivocal: Commerzbank is not for sale.