Transactions
12
Insider / T-Mobile US, Inc.
SIEVERT G MICHAEL
Director at T-Mobile US, Inc.
- Company
- T-Mobile US, Inc.
- First filing on record
- November 12, 2025
- Latest trade on record
- June 1, 2026
- SEC filings
- EDGAR ↗
SIEVERT G MICHAEL, Director at T-Mobile US, Inc., has disclosed 12 transactions in ALK, SBUX, TMUS since November 12, 2025: 0 purchases (0 open-market buys) and 7 sales, worth about $50.6M at the reported prices. The latest was filed June 3, 2026, 2 days after the trade.
Open-market buys
0
Sales
7
Avg. disclosure lag
2.2d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months SIEVERT G MICHAEL made no purchases and 7 sales worth $50M, plus 5 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
SIEVERT G MICHAEL has traded 1 stock on record; the largest by dollars is TMUS.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 7 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| S | Open-market sale | 5 | 140,000 | $30.2M |
| A | Grant or award | 3 | 143,840 | $190K |
| F | Shares withheld for tax | 2 | 97,623 | $20.2M |
| G | Gift | 2 | 108,818 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 5 | 0 | 3 · $20.5M |
| 2025 | 7 | 0 | 4 · $29.9M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| ALK | Other A | June 1, 2026 | June 3, 2026 | 2d | 4,258 | $45 | $190K | Form 4 ↗ | ||
| SBUX | Other A | March 25, 2026 | March 27, 2026 | 2d | 3,667 | — | — | Form 4 ↗ | ||
| TMUS | Sell S | February 24, 2026 | February 25, 2026 | 1d | 1,089 | $222 | $242K | Form 4 ↗ | ||
| TMUS | Sell S | February 23, 2026 | February 25, 2026 | 2d | 13,911 | $220 | $3.1M | Form 4 ↗ | ||
| TMUS | Sell S | February 19, 2026 | February 23, 2026 | 4d | 80,000 | $215 | $17.2M | Form 4 ↗ | ||
| TMUS | Other G | December 3, 2025 | December 4, 2025 | 1d | 65,500 | — | — | Form 4 ↗ | ||
| TMUS | Sell S | November 18, 2025 | November 19, 2025 | 1d | 22,500 | $214 | $4.8M | 10b5-1 plan | Form 4 ↗ | |
| TMUS | Sell S | November 17, 2025 | November 19, 2025 | 2d | 22,500 | $217 | $4.9M | 10b5-1 plan | Form 4 ↗ | |
| TMUS | Other G | November 10, 2025 | November 12, 2025 | 2d | 43,318 | — | — | Form 4 ↗ | ||
| TMUS | Sell F | November 9, 2025 | November 12, 2025 | 3d | 53,483 | $207 | $11.1M | Form 4 ↗ | ||
| TMUS | Other A | November 9, 2025 | November 12, 2025 | 3d | 135,915 | — | — | Form 4 ↗ | ||
| TMUS | Sell F | November 9, 2025 | November 12, 2025 | 3d | 44,140 | $207 | $9.1M | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| June 3, 2026 | Form 4 | 0001182438-26-000004 | 1 | published | EDGAR ↗ |
| March 27, 2026 | Form 4 | 0000829224-26-000054 | 1 | published | EDGAR ↗ |
| February 25, 2026 | Form 4 | 0001283699-26-000040 | 2 | published | EDGAR ↗ |
| February 23, 2026 | Form 4 | 0001283699-26-000036 | 1 | published | EDGAR ↗ |
| December 4, 2025 | Form 4 | 0001283699-25-000170 | 1 | published | EDGAR ↗ |
| November 19, 2025 | Form 4 | 0001283699-25-000168 | 2 | published | EDGAR ↗ |
| November 12, 2025 | Form 4 | 0001283699-25-000164 | 4 | published | EDGAR ↗ |
Other insiders at T-Mobile US, Inc.
- DEUTSCHE TELEKOM AG Director 96 rows
- BREWER BRADY ceo, International 20 rows
- MAYER MARISSA A Director 20 rows
- Berry Jason M EVP Chief Operating Officer 19 rows
- LEVINE KYLE B EVP Corp Pub Aff & Chf Leg Off 19 rows
- MINICUCCI BENITO CEO AND PRESIDENT 19 rows
- SCHNEIDER ANDREA L CEO Horizon Airlines 19 rows
- HARRISON ANDREW R EVP AND CCO 18 rows
- KAVANAUGH JAMES J Director 18 rows
- BIRKETT RAKOW DIANA EVP & CEO of Hawaiian Airlines 15 rows
Everyone on file, with contracts and lobbying under the company's name: T-Mobile US, Inc..
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 7 | 12 | November 12, 2025 | June 3, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.