SEI Investments CompanySEC Filings
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All SEC filings by SEI Investments Company (SEIC) — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.
Financials
| 10-Q | Quarterly report | View Diff | Jul 27, 2026 | |
| 10-Q | Quarterly report | View Diff | Apr 27, 2026 | |
| ARS | Annual report to shareholders | Apr 15, 2026 | ||
| 10-K | Annual report | View Diff | Feb 23, 2026 | |
| 10-Q | Quarterly report | View Diff | Oct 27, 2025 | |
| 10-Q | Quarterly report | View Diff | Jul 28, 2025 | |
| 10-Q | Quarterly report | View Diff | Apr 28, 2025 | |
| ARS | Annual report to shareholders | Apr 14, 2025 | ||
| 10-K | Annual report | View Diff | Feb 20, 2025 | |
| 10-Q | Quarterly report | View Diff | Oct 25, 2024 |
Events
| 8-K | Sei Reports Second-Quarter 2026 Financial Results | Jul 22, 2026 | ||
| 8-K | Submission of Matters to a Vote of Security Holders | May 28, 2026 | ||
| 8-K | Sei Reports First-Quarter 2026 Financial Results | Apr 22, 2026 | ||
| 8-K | Regulation Fd Disclosure | Mar 2, 2026 | ||
| 8-K | Sei Reports Fourth-Quarter 2025 Financial Results | Jan 28, 2026 | ||
| 8-K | Departure of Directors or Certain Officers | Jan 15, 2026 | ||
| 8-K | Departure of Directors or Certain Officers | Dec 17, 2025 | ||
| 8-K | Regulation Fd Disclosure | Dec 3, 2025 | ||
| 8-K | Other Events | Oct 24, 2025 | ||
| 8-K | Investor Contact Media Contact | Oct 22, 2025 |
Registrations and Prospectuses
| S-8 | Registration of securities for employees | Jul 26, 2024 | ||
| S-8 | Registration of securities for employees | Jul 24, 2014 | ||
| 8-A12B | Registration of securities on exchange | Jan 7, 2009 | ||
| S-8 | Registration of securities for employees | Mar 5, 2008 | ||
| S-8 | Registration of securities for employees | Dec 16, 2003 | ||
| S-8 | Registration of securities for employees | Jul 26, 1999 | ||
| RW | Registration withdrawal request | Jul 13, 1999 | ||
| 8-A12B | Registration of securities on exchange | Jun 18, 1999 | ||
| 8-A12B | Registration of securities on exchange | Jun 18, 1999 | ||
| 8-A12G | Registration of securities | Jun 16, 1999 |
Proxies
| N-PX | Annual report of proxy voting record | Aug 27, 2026 | ||
| DEF 14A | Annual Meeting of Shareholders | View Diff | Apr 15, 2026 | |
| N-PX | Annual report of proxy voting record | Aug 25, 2025 | ||
| DEFA14A | Additional proxy soliciting materials | May 7, 2025 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 14, 2025 | |
| N-PX | Annual report of proxy voting record | Aug 21, 2024 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 15, 2024 | |
| DEF 14A | Definitive proxy | View Diff | Apr 20, 2023 | |
| DEF 14A | Definitive proxy | View Diff | Apr 27, 2022 | |
| DEF 14A | Definitive proxy | View Diff | Apr 27, 2021 |
Other
| UPLOAD | Letter from SEC | Feb 5, 2016 | ||
| CORRESP | Correspondence with SEC | Jan 14, 2016 | ||
| CORRESP | Correspondence with SEC | Dec 9, 2015 | ||
| UPLOAD | Letter from SEC | Dec 1, 2015 | ||
| UPLOAD | Letter from SEC | Oct 10, 2012 | ||
| CORRESP | Correspondence with SEC | Sep 17, 2012 | ||
| CORRESP | Correspondence with SEC | Aug 28, 2012 | ||
| UPLOAD | Letter from SEC | Aug 21, 2012 | ||
| CORRESP | Correspondence with SEC | Jul 9, 2012 | ||
| CORRESP | Correspondence with SEC | Jun 19, 2012 |
Ownership
| 4 | West Alfred P Jr | Oct 1, 2026 | ||
| 144 | Notice of proposed sale of securities | Sep 29, 2026 | ||
| 4 | Lane Michael | Sep 24, 2026 | ||
| 144 | Notice of proposed sale of securities | Sep 22, 2026 | ||
| 4 | Hicke Ryan | Sep 8, 2026 | ||
| 4 | Romeo Carmen | Sep 3, 2026 | ||
| 144 | Notice of proposed sale of securities | Sep 3, 2026 | ||
| 144 | Notice of proposed sale of securities | Sep 1, 2026 | ||
| 4 | Peterson Michael | Sep 1, 2026 | ||
| 144 | Notice of proposed sale of securities | Aug 28, 2026 |