---
schema_version: "secwatch.filing_event.v1"
accession: "0001283699-25-000153"
form_type: "8-K"
ticker: "TMUS"
cik: "0001283699"
company_name: "T-Mobile US, Inc."
filed_at: "2025-10-23T23:59:59+00:00"
generated_at: "2026-05-17T02:27:19.847078+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# T-Mobile Q3: record postpaid phone adds of 1.0M; raises guidance; CEO Sievert to be succeeded by Srini Gopalan

## Summary
- Total postpaid net customer additions of 2.3M (best-ever); postpaid phone net adds 1.0M, highest Q3 in over a decade.
- Service revenues $18.2B (+9% YoY); Net income $2.7B, diluted EPS $2.41; Core Adjusted EBITDA $8.7B (+6% YoY).
- Guidance raised across the board; Adjusted Free Cash Flow $4.8B; stockholder returns $3.5B in Q3.
- CEO Mike Sievert to step down; COO Srini Gopalan named incoming CEO, effective after transition.

## SEC filing metadata
- accession: 0001283699-25-000153
- form_type: 8-K
- ticker: TMUS
- cik: 0001283699
- company_name: T-Mobile US, Inc.
- filed_at: 2025-10-23T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1283699/000128369925000153/0001283699-25-000153-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1283699/000128369925000153/tmus-20251023.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001283699-25-000153
- JSON: https://secwatch.observer/filing/0001283699-25-000153.json
- Plain text: https://secwatch.observer/filing/0001283699-25-000153.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.