Deutsche Börse

Deutsche Börse had also considered the acquisition again in 2009. On 9 February 2011, reports suggested that NYSE Euronext and Deutsche Börse were in advanced talks about an all-stock merger. Deutsche Börse was in advanced talks to buy NYSE Euronext in a deal that would create the world's largest trading powerhouse. The shares of both companies were temporarily frozen on the news due to the risk of large price movements and clarifications of the deal. A successful deal would see the new company becoming the world's largest stock exchange operator with a market capitalisation of listed companies equal to US$15 trillion, US$13.39 trillion of which is part of the much larger NYSE Euronext, which is approximately six times the size of Deutsche Börse.

President and deputy CEO of NYSE Euronext Dominique Cerutti would become the new company's president and head of commercial and internal technology. Roland Bellegarde, also of NYSE Euronext, would become the head of European cash equities. The new company would potentially have €300 million (US$410 million) in cost savings. However, the merger would be subject to review in both the United States and European Union under concerns it could create a "de facto monopoly". NYSE Euronext shareholders approved the Deutsche Börse's all-stock deal on 7 July 2011, and Deutsche Börse shareholders had accepted the deal by 15 July 2011.

On 22 December 2011, Deutsche Boerse won U.S. antitrust approval to buy NYSE Euronext, on the condition that a Deutsche Börse subsidiary, the International Securities Exchange, divest its 31.5% interest in Direct Edge. NYSE Euronext and Deutsche Boerse AG delayed the deadline for completing their merger until 31 March 2012, as the exchange operators try to persuade European regulators to approve the deal.

The European Commission blocked the merger on 1 February 2012, citing the fact that the merged company would have a near monopoly. This measure taken by the EC is the fourth blocking in over a decade. The commission rejected the merger on antitrust grounds, saying the combined businesses would dominate Europe's on-exchange derivatives trading with an estimated 93% market share. "This is a black day for Europe and its global competitiveness on financial markets", said former Deutsche Börse chief executive Reto Francioni. NYSE Euronext chairman Jan-Michiel Hessels said: "While we are disappointed and strongly disagree with the EU decision, which is based on a fundamentally different understanding of the derivatives market, it is now time to move on".

Failed merger with London Stock Exchange Group

In March 2016, the company announced it had reached an agreement with London Stock Exchange Group to merge. The companies were to be brought under a new holding company, with a temporary placeholder name of UK TopCo, and would have retained both headquarters in London and Frankfurt. The deal needed approval from regulators in the European Union, the U.S. and Russia. The London Stock Exchange said Russian approval was needed because it owns Exactpro, a firm with offices in Russia specializing in quality assurance for exchanges and financial organizations. The European Commission opened an in-depth investigation into the proposed Deutsche Börse/LSEG merger on 28 September 2016. The European Commission delayed its decision on the deal by 15 working days to 6 March 2017. LSEG planned to hive off the French half of its LCH SA arm in a bid to ease EU concerns about the deal, although the companies had not formally submitted any concessions to the commission.

In February 2017, the Commission required that the parties commit to the divestment of LSEG's majority stake in fixed-income sovereign bond trading platform MTS S.p.A. LSEG stated it would not sell MTS in Italy to appease anti-trust concerns. The planned merger between the two exchanges, which was estimated to create the largest exchange in Europe, was subsequently described as "at risk" by The Wall Street Journal. The merger attempt was blocked by EU Competition Regulator on 29 March 2017 stating that "The Commission's investigation concluded the merger would have created a de facto monopoly in the markets for clearing fixed income instruments".

Allfunds Acquisition

In January 2026, Deutsche Börse agreed to acquire wealth management company Allfunds for €5.3 billion (~$6.19 billion). The deal was structured as a cash and stock deal and Allfunds shareholders are entitled to further dividends pending results. The deal was expected to close by 1H 2027.