G MICHAEL SIEVERT
CIK 1182438 · President and CEO · last filed 2026-06-03
"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.
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Disclosed Exposure
$76.04M
Companies
10
Total Filings
77
Lifetime Open-Market Net
-$197.09M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 8 of 8
77 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2010-05-24 | Clearwire Corp /DE (CLWRR) Delisted | Sell (S) | −133,334 | -$1.04M | EDGAR |
| 2010-05-04 | Switch & Data Facilities Company, Inc. (SDXC) Delisted | Disp (D) | −11,154 | $0 | EDGAR |
| 2010-04-27 | Switch & Data Facilities Company, Inc. (SDXC) Delisted | Mixed | +11,154 | -$14 | EDGAR |
| 2010-03-12 | Clearwire Corp /DE (CLWRR) Delisted | Grant (A) | +39,524 | $0 | EDGAR |
| 2009-05-22 | — | Grant (A) | +400,000 | $0 | |
| 2009-02-26 | Switch & Data Facilities Company, Inc. (SDXC) Delisted | Grant (A) | — | $0 | EDGAR |
| 2008-02-28 | Switch & Data Facilities Company, Inc. (SDXC) Delisted | Grant (A) | — | $0 | EDGAR |
Showing 71–77 of 77
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Page 8 of 8
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.