---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-187812"
form_type: "8-K"
ticker: "TMUS"
cik: "0001283699"
company_name: "T-Mobile US, Inc."
filed_at: "2025-08-25T23:59:59+00:00"
generated_at: "2026-05-17T10:10:19.157909+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# T-Mobile appoints two presidents, Callie Field steps down from Business Group

## Summary
- André Almeida appointed President of Growth and Emerging Businesses effective Sept 1, 2025; resigns from Board Aug 31.
- John Saw promoted to President of Technology, replacing retiring Ulf Ewaldsson.
- Callie Field steps down as President, Business Group on Sept 30, 2025; remains strategic advisor through Mar 31, 2026.

## SEC filing metadata
- accession: 0001193125-25-187812
- form_type: 8-K
- ticker: TMUS
- cik: 0001283699
- company_name: T-Mobile US, Inc.
- filed_at: 2025-08-25T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1283699/000119312525187812/0001193125-25-187812-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1283699/000119312525187812/d75360d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-187812
- JSON: https://secwatch.observer/filing/0001193125-25-187812.json
- Plain text: https://secwatch.observer/filing/0001193125-25-187812.txt

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