Sandler O'Neill and Partners
| Company type | Partnership |
|---|---|
| Industry | Investment banking |
| Founded | 1988 |
| Defunct | 2019 |
| Fate | Acquired by Piper Jaffray, now Piper Sandler Companies |
| Headquarters | 1251 Avenue of the Americas, New York, New York, US |
Key people | James J. Dunne III, Senior Managing Principal Jonathan J. Doyle, Senior Managing Principal |
| Website | www |
Sandler O'Neill + Partners, L.P., (Sandler O'Neill) was a full-service investment banking firm and broker-dealer specializing in the financial services sector. It was headquartered in New York City, and had offices in Boston, Chicago, San Francisco and Atlanta. The firm also operated a mortgage finance company and registered investment adviser based in Memphis.