William Frederick Bartlett is listed as Chief Executive Officer, Limited Partner at Parallax Volatility Advisers, L.P. on SEC Form ADV.
Form ADV reports a beneficial ownership band of 25-50%.
| Title | Chief Executive Officer, Limited Partner |
| Ownership | 25-50% |
| Control person | Yes |
| Since | 1996 |
| Title | Manager, Member |
| Ownership | 25-50% |
| Control person | Yes |
| Since | 2014 |