G. Michael Sievert

G. Michael Sievert

CEO · T-Mobile US, Inc.

Rank #3,636 SEC EDGAR (United States) ↗ Files from United States

Details

Officer and board memberTelecommunicationsUnited StatesBorn May 10, 1969 · age 57Wharton SchoolTMUSSEC CIK 0001182438X ↗LinkedIn ↗

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Disclosed holdings
$24.0M
1-day change
▼ 3.36%
Positions on file
2
issuers disclosed in Forms 3/4/5 and Schedules 13D/G

Disclosed holdings over time 53 weekly points

What the 2 currently disclosed positions would have been worth at each week’s closing price. A rising line means the shares got more valuable, not that this person bought more.

How the line is built

Share counts are as last reported to the SEC and held constant; only prices move.

2025-09-05$22.9M – $32.7M2026-09-04

Insider activity May 13, 2024 – Mar 25, 2026

G. Michael Sievert is recorded in filings to the U.S. SEC via EDGAR as officer and board member, and reported 31 transactions between May 13, 2024 and Mar 25, 2026. The buy and sell totals below count only codes P, S.

Why the other codes are excluded

Share awards (A), shares withheld to pay tax (F), option exercises (M) and gifts (G) also appear in the table, but they are consequences of a pay package or a private transfer, not a decision to buy or sell on the open market. Counting them would turn this into a compensation ranking.

Open-market buys (code P)
None
0 purchases on file
Open-market sales (code S)
$98.06M
18 sales on file priced rows only
All reported transactions
31
every code, including awards and exercises
Pattern
Net seller in the final 12 months of the window
last 12 months of the window

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

G. Michael Sievert sold 80,000 T-Mobile US, Inc. (TMUS) shares for $17,195,200 on Feb 19, 2026

Unusual change in a direct holding

Flagged because the change that day in the shares this person holds directly was unusually large compared with their own earlier changes. The rows below are the open-market trades reported that day; under each share count is the balance the filing reports after that line.

G. Michael Sievert sold 80,000 T-Mobile US, Inc. (TMUS) shares for $17,195,200 on Feb 19, 2026
Date Insider Transaction Shares Price Value Filing
Feb 19, 2026 G. Michael Sievert S Open-market sale 80,000 held after: 140,695.95 $214.94 $17,195,200 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Reported transactions

Price 0.00 is a real reported figure on gifts (G) and share awards (A) — not a missing number. The 25 most recent rows are grouped into 22 lines by date, company and transaction type — open a line to see every lot with its own source link. We hold 32 on file in total. See the full history on EDGAR ↗

How to read this list

Every row is one line of one Form 4 or Form 5, with the filing it came from. Where the record carries no price at all we leave the cell empty instead of guessing one.

The shares and money on a grouped line add up only the lots listed inside that line, and only when every one of them carries the figure. Where a group mixes more than one reporting currency we leave the money blank rather than convert — no source publishes the rate that conversion would need.

  1. ALASKA AIR GROUP, INC. ALK A Grant or awardnot a buy/sell decision 4,258 shares $189.6K at $44.52 SEC filing ↗
  2. STARBUCKS CORP SBUX A Grant or awardnot a buy/sell decisionreported at zero 3,667 shares $0 at $0.00 SEC filing ↗
  3. T-Mobile US, Inc. TMUS S Open-market sale 1,089 shares $241.6K at $221.85 SEC filing ↗
  4. T-Mobile US, Inc. TMUS S Open-market sale 13,911 shares $3.06M at $220.07 SEC filing ↗
  5. T-Mobile US, Inc. TMUS S Open-market sale 80,000 shares $17.20M at $214.94 SEC filing ↗
  6. T-Mobile US, Inc. TMUS G Bona fide giftnot a buy/sell decisionreported at zero 65,500 shares $0 at $0.00 SEC filing ↗
  7. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $4.82M at $214.25 SEC filing ↗
  8. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $4.88M at $216.97 SEC filing ↗
  9. T-Mobile US, Inc. TMUS G Bona fide giftnot a buy/sell decisionreported at zero 43,318 shares $0 at $0.00 SEC filing ↗
  10. T-Mobile US, Inc. TMUS F Shares withheld for taxes × 2not a buy/sell decision 97,623 shares $20.21M
    The 2 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    44,140 $207.00 $9.14M SEC filing ↗
    53,483 $207.00 $11.07M SEC filing ↗
  11. T-Mobile US, Inc. TMUS A Grant or awardnot a buy/sell decisionreported at zero 135,915 shares $0 at $0.00 SEC filing ↗
  12. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $5.79M at $257.17 SEC filing ↗
  13. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $5.75M at $255.58 SEC filing ↗
  14. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $5.42M at $240.99 SEC filing ↗
  15. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $5.50M at $244.40 SEC filing ↗
  16. T-Mobile US, Inc. TMUS F Shares withheld for taxesnot a buy/sell decision 50,223 shares $13.49M at $268.54 SEC filing ↗
  17. T-Mobile US, Inc. TMUS A Grant or awardnot a buy/sell decisionreported at zero 127,631 shares $0 at $0.00 SEC filing ↗
  18. STARBUCKS CORP SBUX A Grant or awardnot a buy/sell decisionreported at zero 3,141 shares $0 at $0.00 SEC filing ↗
  19. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $5.94M at $263.98 SEC filing ↗
  20. T-Mobile US, Inc. TMUS S Open-market sale 22,500 shares $6.07M at $269.67 SEC filing ↗
  21. T-Mobile US, Inc. TMUS A Grant or award × 2not a buy/sell decisionreported at zero 136,735 shares $0
    The 2 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    88,294 $0.00reported at zero $0 SEC filing ↗
    48,441 $0.00reported at zero $0 SEC filing ↗
  22. T-Mobile US, Inc. TMUS F Shares withheld for taxes × 2not a buy/sell decision 61,046 shares $16.53M
    The 2 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    34,744 $270.82 $9.41M SEC filing ↗
    26,302 $270.82 $7.12M SEC filing ↗

Disclosed holdings

Shares is the amount on the form; value is that amount times the closing price shown. Rows with no closing price are left blank, so they may add up to less than the headline figure.

What is not counted here

Each row is one filing you can open. Private companies, real estate, bonds and crypto are not in SEC insider filings and are therefore not counted here.

Equity positions disclosed to the SEC, with the source filing behind each row.
Issuer Ticker Security Shares Close Value Form Reported Filing
T-Mobile US, Inc. TMUS Common Stock 125,696 $181.52 $22.8M 4 EDGAR ↗
STARBUCKS CORP SBUX Common Stock 10,878 $104.47 $1.1M 4 EDGAR ↗

Other insiders at the same companies

People who also file with the SEC at a company where G. Michael Sievert reports shares.

Sharing a filing does not mean they work together day to day — it means both names appear on the same issuer’s insider record.

Sources

The filings linked in the tables above are the sources for every figure on this page.

Portrait photograph: T-Mobile USA, CC BY-SA 4.0. Original file page on Wikimedia Commons ↗

Think a number here is wrong? Open the linked filing and compare — how to report it.

Profile record last refreshed Sep 8, 2026.