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AI brief of an SEC Form 8-K · T-Mobile US (TMUS)

T-Mobile names Chris Sambar Chief Enterprise Officer; CMO Mike Katz steps away July 8

Neutral Impact 4 of 5 leadership Written later

T-Mobile appointed Chris Sambar, formerly Chief Operating Officer at Public Storage and a two-decade AT&T veteran, as Chief Enterprise Officer, effective no later than October 14, 2026. Chief Business and Product Officer Michael J. Katz is leaving his role effective July 8, 2026, and will remain as a strategic advisor through December 2026. The filing reports no financial results, so the changes affect shareholders through leadership structure rather than current numbers.

Key points

  • Chris Sambar joins as Chief Enterprise Officer, effective no later than October 14, 2026, reporting to CEO Srinivasan Gopalan
  • Michael J. Katz, Chief Business and Product Officer, steps away effective July 8, 2026, and stays as strategic advisor through December 2026
  • André Almeida moves to Chief Marketing, Brand and Broadband Officer; Dr. John Saw expands his role to include product engineering and cybersecurity

The filing

CompanyT-Mobile US (TMUS)
Form8-K, current report
Filed with the SECJul 7, 2026, 4:29 PM ET
Accession number0001193125-26-297534

Items reported: 5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 2:16 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on July 07, 2026.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.