Telekom's Sprint-Era Legal Cloud Lingers as Delaware Trial Date Nears

Deutsche Telekom shares stabilize above 50-day average, but $2B US lawsuit and tariff migration pose risks.

The Deutsche Telekom share price has spent much of 2025 trading in the shadow of its own history. While the stock has clawed back above its 50-day moving average of €27.15, it remains roughly 17 percent below the 52-week high of €34.35 set in late February. The overhang: a US class-action lawsuit tied to the 2020 Sprint-T-Mobile US merger that could carry a multibillion-dollar price tag.

The case, Dinkevich v. Deutsche Telekom, is scheduled for trial in October 2027 before the Delaware Court of Chancery. Plaintiffs are seeking $2 billion plus interest, while claiming damages exceeding $10 billion. Their central allegation is that the Bonn-based group shortchanged minority shareholders during the Sprint transaction, with accusations extending as far as potential insider dealing. A separate proceeding, Dale et al., is also running in Illinois.

For investors, the timeline matters as much as the numbers. With the trial still more than a year away, the litigation is unlikely to disrupt day-to-day operations — but it does inject a persistent dose of uncertainty into the equity story. The stakes are existential in reputation terms too: the Sprint acquisition transformed T-Mobile US into a genuine third force alongside AT&T and Verizon, and a court ruling against Telekom would tarnish one of the defining deals of CEO Tim Höttges' tenure.

At the heart of the plaintiffs' case is a text message sent by Höttges on 16 May 2020, which has emerged as a pivotal piece of evidence. Should the court side with the claimants, observers suggest the financial fallout could run into the billions — a scenario the market has so far declined to price in as an immediate risk.

Friday's session told that story clearly enough. The stock gained 1.3 percent to €28.49, building on Thursday's close of €28.13, which had itself followed a 2.9 percent drop. Over the past 30 days, the shares are still up 2.5 percent, suggesting the recent legal headlines have dented but not derailed the short-term momentum.

The legal overhang is not the only issue competing for management's attention. Back in Germany, Telekom is pushing through a migration of roughly 1.3 million legacy telephone-only lines onto new tariff structures. Customers who fail to respond face noticeably higher charges. The new plans range from "Call Basic" via mobile radio at €22.95 per month with 120 free minutes, up to "Call Comfort" with a fixed-line flat rate at €32.45. A router rental fee of €3.95 monthly — or a one-off payment of €100 — applies on top. With rival offers available from around €10 per month, the gap is stark enough to draw regulatory and competition scrutiny.

Security is another front. A Bavarian broadcaster test involving more than 70 calls found that device models and operating system versions were transmitted during calls routed over Telekom's and Vodafone's networks. Telefónica (O2) went further, with IMEI numbers also exposed. Germany's federal cybersecurity agency, however, gave the all-clear for the more modern LTE and 5G standards, which are not affected.

Telekom is also among more than 100 companies — including OpenAI, Microsoft and Google — that have jointly warned of AI-enabled cyberattacks targeting critical infrastructure. US security agencies report that attackers are already deploying artificial intelligence to exploit weaknesses in industrial control systems, a concern of direct relevance to a network operator that both runs and protects critical infrastructure.

For now, the market's verdict is one of cautious patience. The shares are stabilising above their 50-day average, the trial date is set but distant, and the operational picture remains intact. The uncertainty itself — rather than any quantifiable exposure — is what investors are being asked to carry.