Lagan Holding Company Trust is listed as General Partner at Congress Asset Management Company, LLP on SEC Form ADV.
Form ADV reports a beneficial ownership band of Over 75%.
| Title | General Partner |
| Ownership | Over 75% |
| Control person | Yes |
| Since | 1990 |
| Title | Indirect Owner |
| Ownership | Over 75% |
| Control person | Yes |
| Since | 2004 |