T-Mobile US (TMUS) vs SoftBank Group (9984)
T-Mobile US (TMUS) and SoftBank Group (9984) side by side: both in Communication Services, listed on Nasdaq Stock Market and Japan Exchange Group (TSE). T-Mobile US is the larger of the two by approximate market capitalization (about 1.1×).
| Field | T-Mobile US | SoftBank Group |
|---|---|---|
| Legal name | T-Mobile US, Inc. | SoftBank Group Corp. |
| Ticker | TMUS | 9984 |
| Exchange | Nasdaq Stock Market XNAS | Japan Exchange Group (TSE) XJPX |
| Jurisdiction | United States | Japan |
| Sector | Communication Services | Communication Services |
| Industry | Wireless telecommunications | Technology investment holding |
| Market cap ≈ | $194.6bn | $184.6bn |
| Founded | 1994 | 1981 |
| Reporting currency | USD | JPY |
| LEI | 549300QHIJYOHPACPG31 | 5493003BZYYYCDIO0R13 |
| ISIN | US8725901040 | JP3436100006 |
| FIGI | BBG001SKR9Y6 | BBG001S82FT2 |
| Index membership | S&P 500, Nasdaq-100 | Nikkei 225 |
| Held by (covered funds) | — | — |
T-Mobile US
One of the three big US wireless carriers, majority-owned by Deutsche Telekom, with the leading standalone 5G network built partly on Sprint spectrum acquired in 2020.
SoftBank Group
Masayoshi Son's technology investment holding company, owner of a majority stake in chip designer Arm and manager of the Vision Funds. Heavily exposed to AI infrastructure bets.
Market caps are computed from each issuer's own filed share count times the close on 2026-08-28, not copied from a vendor; LEI from GLEIF (CC0), ISIN read from each issuer's own primary listing document with its ISO 6166 check digit validated, FIGI from OpenFIGI, MIC from the ISO 10383 registry — full provenance on Sources. Not real-time, not investment advice. Both sides as data: /api/v1/companies/t-mobile-us · /api/v1/companies/softbank-group