United Internet H1 Profit, EBITDA Climb, Mobile Internet Contracts Down; Confirms FY26 Outlook

United Internet AG reported first-half FY2026 net income attributable to shareholders of €126.51M (vs. €103.24M), with EPS rising to €0.73 from €0.59. Sales increased to €3.09B (from €3.0B) and operating EBIT rose 20% to €342.4M, while adjusted EBITDA grew 5.1% to €676.0M. For FY2026, the company reiterated/raised expectations for sales to ~€6.25B (from €6.104B) and EBITDA to ~€1.45B (from €1.282B), alongside +550k fee-based customer contracts to 30.27M.

Analysis

The market should discount the headline profit lift and focus on mix. The quality signal is that the company is still growing its fee base, but the mobile line is shrinking while broadband is barely offsetting it, which suggests the core issue is not demand momentum but portfolio transition. That tends to cap multiple expansion because investors will pay up for telecoms/ISP names only when subscriber growth translates into durable ARPU and cash conversion, not just accounting earnings.

Second-order, this is a relative-value setup inside German telecom rather than a clean outright long. If mobile attrition reflects customer churn rather than a temporary migration effect, competitive share is likely leaking toward larger incumbents with stronger network economics, while the company bears the cost of defending customers. Over 1-3 months, the key question is whether revenue growth can outpace acquisition and retention spend; over 6-18 months, the risk is that a weaker mobile franchise forces more capex or wholesale dependence, pressuring free cash flow.

Contrarian view: the stock may not be as weak as the market assumes if the mobile decline is transitional and broadband/hosting can re-accelerate. But absent a clear improvement in net adds and cash flow, this is mostly an accounting beat, not a fundamental inflection. The thesis is falsified if the next update shows stabilized mobile contracts, better conversion of EBITDA into operating cash, and no need to revise revenue guidance lower.

Key Decisions for Investors

• Prefer a relative-value short: short UDIRF on post-earnings strength versus long Deutsche Telekom (DTEGY) for 1-3 months, betting that higher-quality mobile scale and cash flow outperform if UDIRF’s subscriber mix keeps deteriorating.
• If UDIRF gaps up >3-5% on the print, fade the move with a tight stop above the post-print high; risk/reward is favorable because the incremental earnings quality is weaker than the headline suggests.
• Set an alert on the next quarterly mobile net-add trend and EBITDA-to-FCF conversion; if mobile losses persist or FCF lags EBITDA, treat any rally as a sell/trim signal rather than a structural re-rating.
• Only consider a tactical long UDIRF on a pullback if management can prove the mobile decline was transitional and not churn-driven; otherwise the upside is capped while downside to guidance credibility remains.