Marianne D'Alessandro is listed as Member at Gagnon Securities, LLC on SEC Form ADV.
Form ADV reports a beneficial ownership band of Under 5%.
| Title | Member |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 2011 |
| Title | Chief Financial Officer |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 2017 |
| Title | Chief Financial Officer |
| Ownership | Under 5% |
| Control person | Yes |
| Since | 2018 |