secwatch.observer — SEC 8-K summary
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Issuer:     T-Mobile US, Inc. (TMUS)
CIK:        0001283699
Form:       8-K
Filed at:   2025-08-25T23:59:59+00:00
Accession:  0001193125-25-187812
Event type: leadership
Sentiment:  neutral
Materiality: 0.50
Item codes: 5.02
LLM model:  deepseek-v4-flash:cloud@v2

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

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1283699/000119312525187812/0001193125-25-187812-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1283699/000119312525187812/d75360d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-25-187812

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer