---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-297534"
form_type: "8-K"
ticker: "TMUS"
cik: "0001283699"
company_name: "T-Mobile US, Inc."
filed_at: "2026-07-07T20:29:49+00:00"
generated_at: "2026-07-07T20:31:30.951142+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# T-Mobile appoints Chris Sambar as Chief Enterprise Officer; leadership team reshuffled

## Summary
- Chris Sambar appointed Chief Enterprise Officer (effective by Oct 14, 2026); previously COO at Public Storage, 20-year AT&T veteran.
- André Almeida promoted to Chief Marketing, Brand and Broadband Officer, overseeing consumer wireless and broadband.
- Dr. John Saw expands role to include product engineering and cybersecurity in addition to CTO duties.
- Mike Katz steps down as Chief Business and Product Officer effective July 8, 2026; remains strategic advisor through Dec 2026.

## SEC filing metadata
- accession: 0001193125-26-297534
- form_type: 8-K
- ticker: TMUS
- cik: 0001283699
- company_name: T-Mobile US, Inc.
- filed_at: 2026-07-07T20:29:49+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1283699/000119312526297534/0001193125-26-297534-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1283699/000119312526297534/d170112d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-297534
- JSON: https://secwatch.observer/filing/0001193125-26-297534.json
- Plain text: https://secwatch.observer/filing/0001193125-26-297534.txt

## Key facts
- Executive change
  André Almeida changed role as Chief Marketing, Brand and Broadband Officer at T-Mobile US, Inc..
  - Action: promoted
  - Role: Chief Marketing, Brand and Broadband Officer
  source text: In connection with Mr. Sambar’s hiring, André Almeida, currently the Company’s Chief Broadband, Enterprise and Emerging Business Officer, will transition to the role of Chief Marketing, Brand, and Broadband Officer.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1283699/000119312526297534/0001193125-26-297534-index.htm
- Executive change
  Dr. John Saw changed role as Chief Technology Officer at T-Mobile US, Inc..
  - Action: expanded role
  - Role: Chief Technology Officer
  source text: Additionally, Dr. John Saw, the Company’s Chief Technology Officer, will expand his purview to include product engineering and cybersecurity, in addition to his existing responsibilities.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1283699/000119312526297534/0001193125-26-297534-index.htm
- Executive change
  Michael J. Katz departed as Chief Business and Product Officer at T-Mobile US, Inc..
  - Action: stepped down
  - Role: Chief Business and Product Officer
  source text: After over two decades in various leadership positions with the Company, Michael J. Katz, the Company’s Chief Business and Product Officer, has decided to step away from his position at the Company effective July 8, 2026, but he will remain with the Company as a strategic advisor through December 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1283699/000119312526297534/0001193125-26-297534-index.htm
- Executive change
  Chris Sambar was appointed as Chief Enterprise Officer at T-Mobile US, Inc..
  - Action: appointed
  - Role: Chief Enterprise Officer
  source text: T-Mobile US, Inc. (the “Company”) announced that it has appointed Chris Sambar as its Chief Enterprise Officer, effective no later than October 14, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1283699/000119312526297534/0001193125-26-297534-index.htm

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