Blair Norbert Welch is listed as Founding Partner at Slate Advisory Service (US) LLC on SEC Form ADV.
Form ADV reports a beneficial ownership band of Under 5%.
| Title | Founding Partner |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 2020 |
| Title | Shareholder |
| Ownership | 50-75% |
| Control person | Yes |
| Since | 2019 |
| Title | Shareholder |
| Ownership | 50-75% |
| Control person | Yes |
| Since | 2019 |
| Title | Shareholder |
| Ownership | 50-75% |
| Control person | Yes |
| Since | 2018 |