T-Mobile US, Inc.
Public company- Headquarters
- BELLEVUE, Washington
- Ticker
- TMUS
- CIK
- 0001283699
WARN notices since 2024
7
First: Apr 10, 2026
Workers affected since 2024
625
Across 7 notices
Executive changes, last 12 months
1
0 appointments, 1 departure
Last event
Oct 28, 2026
Executive departureVice Chair departs: G. Michael Sievert
Workers affected over time
Cumulative workers in WARN notices since 2024
| Notice date | Workers affected | Cumulative |
|---|---|---|
| Apr 10, 2026 | 51 | 51 |
| Apr 14, 2026 | 74 | 125 |
| Apr 16, 2026 | 200 | 325 |
| Apr 21, 2026 | 78 | 403 |
| Aug 7, 2026 | 113 | 516 |
| Aug 17, 2026 | 0 | 516 |
| Oct 14, 2026 | 109 | 625 |
Leadership
| Role and person | Since | Change |
|---|---|---|
| Vice ChairG. Michael Sievert | Oct 28, 2026 | Departed |
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- Executive departure
Vice Chair departs: G. Michael Sievert
G. Michael Sievert, Vice Chair of T-Mobile US, Inc., resigns the role, effective November 1, 2026. The company reported the change in an 8-K that cites Item 5.02.
Source: SEC 8-K, filed Oct 28, 2026Role: Vice Chair
Last verified Nov 8, 2026