Deutsche Telekom AG, Europe’s largest telecom operator, is circling back to its U.S. crown jewel. The German giant, which owns 53% of T-Mobile US Inc., has kicked off early talks for a full merger. A new holding company would launch an all-stock bid for both firms’ shares. The result? A unified behemoth valued near $300 billion—the world’s top telecom by market cap and one of history’s biggest public deals. Markets didn’t cheer. Deutsche Telekom shares dropped over 4% in Frankfurt. T-Mobile dipped too, after an initial pop. Investors smell complexity. And risk. From VoiceStream Roots to Majority Stake This isn’t new territory. Deutsche Telekom bought VoiceStream in 2001 for $50.7 billion, rebranded it T-Mobile. Listed the U.S. unit. Stake diluted over time—first MetroPCS in 2013, then Sprint’s $26 billion all-stock tie-up in 2020 that trimmed ownership below 50%. But the parent fought back. Deals with SoftBank pushed the holding past 50% by mid-2024, hitting 53% now. Fixed-price options from Japan helped.…