WILLIAM JAMES PORTER is an investment adviser representative (IAR) with state registration records since 2017, appearing at 1 firm. Currently registered with MADISON AVENUE SECURITIES, LLC.
| Firm | From | To | Current |
|---|---|---|---|
| MADISON AVENUE SECURITIES, LLC | 2025-05-01 | present | Yes |
| MADISON AVENUE SECURITIES, LLC | 2017-11-17 | 2025-05-01 | — |