Sei Investments Co SEC filings SEIC
Sei Investments Co has 1,001 filings in SEC EDGAR's recent list, going back to Mar 18, 2014. Its latest annual report, Form ARS, was filed on Apr 15, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 26, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 21, 2026 (results of operations, regulation fd disclosure, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 5, 2026 | Nov 4, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 27, 2026 | — |
| 4 | Insider transaction | Oct 1, 2026 | Sep 29, 2026 |
| 144 | Notice of proposed sale | Sep 29, 2026 | — |
| 4 | Insider transaction | Sep 24, 2026 | Sep 22, 2026 |
| 144 | Notice of proposed sale | Sep 22, 2026 | — |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 3, 2026 | Sep 1, 2026 |
| 144 | Notice of proposed sale | Sep 3, 2026 | — |
| 144 | Notice of proposed sale | Sep 1, 2026 | — |
| 4 | Insider transaction | Sep 1, 2026 | Aug 28, 2026 |
| 144 | Notice of proposed sale | Aug 28, 2026 | — |
| 13F-HR | Filing | Aug 14, 2026 | Jun 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 4 | Insider transaction | Aug 6, 2026 | Aug 4, 2026 |
| 144 | Notice of proposed sale | Aug 5, 2026 | — |
| 144 | Notice of proposed sale | Aug 4, 2026 | — |
| 4 | Insider transaction | Aug 4, 2026 | Aug 3, 2026 |
| 144 | Notice of proposed sale | Aug 3, 2026 | — |
| 4 | Insider transaction | Jul 30, 2026 | Jul 28, 2026 |
| 4 | Insider transaction | Jul 30, 2026 | Jul 28, 2026 |
| 4 | Insider transaction | Jul 30, 2026 | Jul 28, 2026 |
| 144 | Notice of proposed sale | Jul 28, 2026 | — |
| 144 | Notice of proposed sale | Jul 28, 2026 | — |
| 144 | Notice of proposed sale | Jul 28, 2026 | — |
| 4 | Insider transaction | Jul 28, 2026 | Jul 24, 2026 |
| 4 | Insider transaction | Jul 28, 2026 | Jul 24, 2026 |
| 144 | Notice of proposed sale | Jul 24, 2026 | — |
| 3 | Initial insider ownership | Jul 23, 2026 | May 26, 2026 |
| 4 | Insider transaction | Jun 29, 2026 | Jun 26, 2026 |
| 144 | Notice of proposed sale | Jun 26, 2026 | — |
| 4 | Insider transaction | Jun 11, 2026 | Jun 9, 2026 |
| 144 | Notice of proposed sale | Jun 9, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 14, 2026 | — |
| 13F-HR | Filing | May 13, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 5, 2026 | May 4, 2026 |
| 144 | Notice of proposed sale | May 4, 2026 | — |
| 4 | Insider transaction | Apr 30, 2026 | Apr 28, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 144 | Notice of proposed sale | Apr 28, 2026 | — |
| 4 | Insider transaction | Apr 24, 2026 | Apr 23, 2026 |
| 4 | Insider transaction | Apr 23, 2026 | Apr 23, 2026 |
| 4 | Insider transaction | Apr 23, 2026 | Apr 23, 2026 |
| 144 | Notice of proposed sale | Apr 23, 2026 | — |
| 144 | Notice of proposed sale | Apr 23, 2026 | — |
| 144 | Notice of proposed sale | Apr 23, 2026 | — |
| 4/A | Form 4/a | Apr 1, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | Apr 1, 2026 | Mar 31, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 19, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | Mar 12, 2026 | Mar 10, 2026 |
| 144 | Notice of proposed sale | Mar 10, 2026 | — |
| 4 | Insider transaction | Feb 26, 2026 | Feb 25, 2026 |
| 144 | Notice of proposed sale | Feb 25, 2026 | — |
| 13F-HR | Filing | Feb 13, 2026 | Dec 31, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2026 | — |
| 4 | Insider transaction | Feb 2, 2026 | Jan 29, 2026 |
| 144 | Notice of proposed sale | Jan 29, 2026 | — |
| 4 | Insider transaction | Jan 2, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Dec 30, 2025 | Dec 30, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 22, 2025 |
| 144 | Notice of proposed sale | Dec 22, 2025 | — |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 4, 2025 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 3, 2025 |
| 144 | Notice of proposed sale | Dec 4, 2025 | — |
| 144 | Notice of proposed sale | Dec 3, 2025 | — |
| 4 | Insider transaction | Nov 18, 2025 | Nov 17, 2025 |
| 13F-HR | Filing | Nov 13, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Nov 13, 2025 | Nov 12, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2025 | — |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Oct 28, 2025 | Oct 24, 2025 |
| 4 | Insider transaction | Sep 29, 2025 | Sep 29, 2025 |
| 144 | Notice of proposed sale | Sep 29, 2025 | — |
| 4 | Insider transaction | Sep 24, 2025 | Sep 23, 2025 |
| 144 | Notice of proposed sale | Sep 23, 2025 | — |
| 144 | Notice of proposed sale | Sep 22, 2025 | — |
| 4 | Insider transaction | Sep 17, 2025 | Sep 16, 2025 |
| 4 | Insider transaction | Aug 20, 2025 | Aug 19, 2025 |
| 144 | Notice of proposed sale | Aug 19, 2025 | — |
| 13F-HR | Filing | Aug 14, 2025 | Jun 30, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2025 | — |
| 4 | Insider transaction | Aug 8, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 5, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 144 | Notice of proposed sale | Jul 31, 2025 | — |
| 4 | Insider transaction | Jul 30, 2025 | Jul 29, 2025 |
| 144 | Notice of proposed sale | Jul 29, 2025 | — |
| 4 | Insider transaction | Jul 24, 2025 | Jul 22, 2025 |
| 3 | Initial insider ownership | Jul 24, 2025 | Jul 22, 2025 |
| 4 | Insider transaction | Jul 24, 2025 | Jul 22, 2025 |
| 3 | Initial insider ownership | Jul 24, 2025 | Jul 22, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 16, 2025 | — |
| 4 | Insider transaction | May 30, 2025 | May 28, 2025 |
| 144 | Notice of proposed sale | May 28, 2025 | — |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 144 | Notice of proposed sale | May 15, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 144 | Notice of proposed sale | May 14, 2025 | — |
| 144 | Notice of proposed sale | May 14, 2025 | — |
| 13F-HR/A | Filing | May 14, 2025 | Mar 31, 2025 |
| 13F-HR | Filing | May 13, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Mar 19, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
| 144 | Notice of proposed sale | Mar 3, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 13F-HR | Filing | Feb 11, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 2, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Dec 17, 2024 | Dec 13, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 12, 2024 |
| 144 | Notice of proposed sale | Dec 13, 2024 | — |
| 144 | Notice of proposed sale | Dec 12, 2024 | — |
| 4 | Insider transaction | Dec 6, 2024 | Dec 4, 2024 |
| 144 | Notice of proposed sale | Dec 6, 2024 | — |
| 144 | Notice of proposed sale | Dec 4, 2024 | — |
| 4 | Insider transaction | Nov 27, 2024 | Nov 26, 2024 |
| 144 | Notice of proposed sale | Nov 26, 2024 | — |
| 4 | Insider transaction | Nov 21, 2024 | Nov 20, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2024 | — |
| 4 | Insider transaction | Nov 12, 2024 | Nov 7, 2024 |
| 13F-HR | Filing | Nov 12, 2024 | Sep 30, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 6, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 6, 2024 |
| 144 | Notice of proposed sale | Nov 7, 2024 | — |
| 144 | Notice of proposed sale | Nov 6, 2024 | — |
| 144 | Notice of proposed sale | Nov 6, 2024 | — |
| 4 | Insider transaction | Oct 29, 2024 | Oct 25, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 25, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 28, 2024 |
| 144 | Notice of proposed sale | Oct 28, 2024 | — |
| 144 | Notice of proposed sale | Oct 28, 2024 | — |
| 144 | Notice of proposed sale | Oct 28, 2024 | — |
| 144 | Notice of proposed sale | Oct 25, 2024 | — |
| 144 | Notice of proposed sale | Oct 25, 2024 | — |
| 144 | Notice of proposed sale | Oct 24, 2024 | — |
| 4 | Insider transaction | Sep 30, 2024 | Sep 30, 2024 |
| 4 | Insider transaction | Sep 17, 2024 | Sep 16, 2024 |
| 3 | Initial insider ownership | Sep 17, 2024 | Sep 16, 2024 |
| 4 | Insider transaction | Aug 30, 2024 | Aug 29, 2024 |
| 4 | Insider transaction | Aug 28, 2024 | Aug 27, 2024 |
| 4 | Insider transaction | Aug 27, 2024 | Aug 23, 2024 |
| 4 | Insider transaction | Aug 23, 2024 | Aug 22, 2024 |
| 144 | Notice of proposed sale | Aug 21, 2024 | — |
| 13F-HR | Filing | Aug 13, 2024 | Jun 30, 2024 |
| 144 | Notice of proposed sale | Jun 27, 2024 | — |
| 4 | Insider transaction | Jun 25, 2024 | Jun 24, 2024 |
| 4 | Insider transaction | May 14, 2024 | May 13, 2024 |
| 4 | Insider transaction | May 13, 2024 | May 9, 2024 |
| 144 | Notice of proposed sale | May 9, 2024 | — |
| 13F-HR | Filing | May 7, 2024 | Mar 31, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Mar 28, 2024 |
| 4 | Insider transaction | Mar 28, 2024 | Mar 26, 2024 |
| 4/A | Form 4/a | Mar 28, 2024 | Mar 18, 2024 |
| 4 | Insider transaction | Mar 28, 2024 | Mar 8, 2024 |
| 3 | Initial insider ownership | Mar 28, 2024 | Feb 29, 2024 |
| 3 | Initial insider ownership | Mar 28, 2024 | Feb 29, 2024 |
| 144 | Notice of proposed sale | Mar 26, 2024 | — |
| 4 | Insider transaction | Mar 18, 2024 | Mar 18, 2024 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Security Brokers, Dealers & Flotation Companies (SIC 6211)
- Listed as
- SEIC (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- PA
- Headquarters
- Oaks, PA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 350894
- Former names
- SEI CORP (until Aug 5, 2004)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.