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 |
|---|---|---|---|
| DEF 14A | Proxy statement | Apr 15, 2026 | May 27, 2026 |
| DEFA14A | Additional proxy material | May 7, 2025 | — |
| DEF 14A | Proxy statement | Apr 14, 2025 | May 28, 2025 |
| DEF 14A | Proxy statement | Apr 15, 2024 | May 29, 2024 |
| DEF 14A | Proxy statement | Apr 20, 2023 | — |
| DEF 14A | Proxy statement | Apr 27, 2022 | Jun 1, 2022 |
| DEF 14A | Proxy statement | Apr 27, 2021 | Jun 2, 2021 |
| DEFA14A | Additional proxy material | May 14, 2020 | — |
| DEF 14A | Proxy statement | Apr 23, 2020 | Jun 3, 2020 |
| DEF 14A | Proxy statement | Apr 17, 2019 | May 29, 2019 |
| DEF 14A | Proxy statement | Apr 10, 2018 | May 30, 2018 |
| DEFA14A | Additional proxy material | Apr 24, 2017 | — |
| DEF 14A | Proxy statement | Apr 5, 2017 | May 24, 2017 |
| DEF 14A | Proxy statement | Apr 5, 2016 | May 25, 2016 |
| DEF 14A | Proxy statement | Apr 9, 2015 | May 27, 2015 |
| DEF 14A | Proxy statement | Apr 11, 2014 | May 21, 2014 |
Showing 16 filings. 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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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All 34 Security Brokers, Dealers & Flotation Companies companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.