BlackRock Takes $6.6B Stake in T-Mobile, But DeepValue WAIT Rating Unchanged

What happened

BlackRock disclosed a new 39.5 million share position in T-Mobile US (TMUS) valued at $6.63 billion, representing 3.68% of shares outstanding, according to a 13F filing. The filing does not clarify whether the stake is actively managed or reflects passive index-related holdings, so its signaling value is limited. Fundamentally, T-Mobile's latest results show revenue per account rising to $152.91 but postpaid account churn ticking up to 0.99% and net account adds falling 13% year-over-year to 277,000. The stock has already repriced significantly, falling from $243.55 to $173.34 over the past twelve months, yet the DeepValue model continues to assign a WAIT rating based on a balanced risk/reward outlook. Overall, this institutional disclosure is a minor positive for sentiment but does not alter the core investment thesis that hinges on churn stabilization and account growth durability.

Implication

Investors should maintain the WAIT stance and focus on upcoming quarterly metrics: postpaid account churn returning to 0.93% or lower and net account adds recovering above 300,000 would warrant a more constructive view; conversely, continued churn pressure or ARPA growth below 2.5% would confirm structural issues and justify a more cautious stance.

Thesis delta

No change to the fundamental thesis. The addition of BlackRock as a large holder may provide marginal support to the share price but likely reflects passive index flows rather than active conviction. The investment case still depends on evidence that premium-plan migrations and fiber expansion strengthen account economics without eroding retention.