John Steven Osterweis is listed as Chairman at Osterweis Capital Management LLC on SEC Form ADV.
Form ADV reports a beneficial ownership band of Under 5%.
| Title | Chairman |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 2016 |
| Title | Trustee, Osterweis Revocable Trust |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 1997 |
| Title | Chairman |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 2016 |
| Title | Trustee, Osterweis Revocable Trust |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 1994 |