JOHN PATRICK CALLAHAN is an investment adviser representative (IAR) with state registration records since 2007, appearing at 2 firms. Currently registered with MERRION INVESTMENT MANAGEMENT CO, LLC.
| Firm | From | To | Current |
|---|---|---|---|
| MERRION INVESTMENT MANAGEMENT CO, LLC | 2026-01-01 | present | Yes |
| RAYMOND JAMES & ASSOCIATES, INC. | 2007-03-05 | 2008-01-18 | — |