Deutsche Telekom Eyes T-Mobile US Merger

Deutsche Telekom is holding early-stage discussions about a potential merger with its U.S. subsidiary, T-Mobile US , according to a report dated April 22. The combination under consideration would create a telecommunications group valued at roughly $400 billion , based on the figures cited.

If pursued and completed, the transaction could rank as the largest public merger on record. The report said it would exceed the $202.7 billion Vodafone-Mannesmann deal from 1999 , which has long been a benchmark for the scale of public M&A in the sector.

Deutsche Telekom already owns a 53% stake in T-Mobile US. The discussions were described as an effort to support growth in what was characterized as a stagnant telecoms industry, where operators have been seeking ways to expand and strengthen their positions.

The report also highlighted that the structure would be complicated by regulatory and geopolitical hurdles. It pointed to strained diplomatic and economic relations between Germany and the United States as a factor that could add friction to any cross-border deal process, alongside the scrutiny that typically accompanies large telecom combinations.

Domestic ownership considerations in Germany were also flagged as a key issue. The German state holds a 28% stake in Deutsche Telekom, and the report said the government would need to back the transaction because its holding could be diluted depending on how the merger is structured.

Based on the market values cited, the merger would bring together Deutsche Telekom at about $166 billion and T-Mobile US at about $218 billion . Analysts said a transatlantic telecom group could have an easier path to capital markets, potentially supporting future cross-border dealmaking.

In market reaction following the report, Deutsche Telekom shares fell by about 3% . The discussions were described as preliminary, and the report underscored that regulatory approvals and political support remain central uncertainties for any next steps.