G MICHAEL SIEVERT
CIK 1182438 · President and CEO · last filed 2026-06-03
G MICHAEL SIEVERT is a President and CEO who has filed 77 SEC Form 4 insider transactions across 10 companies since 2008. The most recent filing shows the insider was granted $189.6K of ALK on Jun 3, 2026. Across all open-market trades the lifetime net is −$197.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $76.0M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$76.04M
10
77
-$197.09M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ALK | Director | 4,258 | $47.32 | $201.5K | $0 | 1 | 2026-06-03 |
| SBUX | Director | 10,878 | $103.04 | $1.12M | $0 | 4 | 2026-03-27 |
| TMUSZ | Director | 125,695 | $20.94 | $2.63M | -$41.74M | 6 | 2026-02-25 |
| TMUS | President and CEO | 381,221 | $189.10 | $72.09M | -$153.90M | 50 | 2025-05-21 |
| T-Mobile US, Inc. (TMUSR) Delisted | President and CEO | — | — | — | $0 | 1 | 2020-07-02 |
| T-Mobile US, Inc. (TMUSP) Delisted | Chief Operating Officer | 379,157 | — | — | $0 | 2 | 2017-06-07 |
| T-Mobile US, Inc. (TMUS.P) Delisted | Chief Operating Officer | 325,331 | — | — | $0 | 2 | 2016-02-26 |
| T-Mobile US, Inc. (TMUSpA) Delisted | Chief Operating Officer | 161,845 | — | — | -$410.1K | 2 | 2015-06-09 |
| Clearwire Corp /DE (CLWRR) Delisted | Chief Commercial Officer | 306,190 | — | — | -$1.04M | 2 | 2010-05-24 |
| Switch & Data Facilities Company, Inc. (SDXC) Delisted | Director | 0 | — | — | $0 | 4 | 2010-05-04 |
Recent Filings
77 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-03 | ALK | Grant (A) | +4,258 | $189.6K | EDGAR |
| 2026-03-27 | SBUX | Grant (A) | +3,667 | $0 | EDGAR |
| 2026-02-25 | TMUSZ | Sell (S) | −15,000 | -$3.30M | EDGAR |
| 2026-02-23 | TMUSZ | Sell (S) | −80,000 | -$17.20M | EDGAR |
| 2025-12-04 | TMUSZ | Gift (G) | −65,500 | $0 | EDGAR |
| 2025-11-19 | TMUSZ | Sell (S) | −45,000 | -$9.70M | EDGAR |
| 2025-11-12 | TMUSZ | Mixed | −5,025 | -$20.21M | EDGAR |
| 2025-08-20 | TMUSZ | Sell (S) | −45,000 | -$11.54M | EDGAR |
| 2025-05-21 | TMUS | Sell (S) | −45,000 | -$10.92M | EDGAR |
| 2025-04-03 | TMUS | Mixed | +77,408 | -$13.49M | EDGAR |