George Bruce Kaiser is listed as Indirect Beneficial Owner at Bok Financial Securities, Inc. on SEC Form ADV.
Form ADV reports a beneficial ownership band of 50-75%.
| Title | Indirect Beneficial Owner |
| Ownership | 50-75% |
| Control person | Yes |
| Since | 1991 |
| Title | Owner |
| Ownership | 50-75% |
| Control person | Yes |
| Since | 2001 |
| Title | Indirect Beneficial Owner |
| Ownership | Over 75% |
| Control person | Yes |
| Since | 2012 |