Sei Investments Co SEC filings SEIC
Sei Investments Co has 1,000 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 |
|---|---|---|---|
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Oct 21, 2026 | Oct 21, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 22, 2026 | Jul 22, 2026 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 28, 2026 | May 27, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 22, 2026 | Apr 22, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 2, 2026 | Mar 2, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 28, 2026 | Jan 28, 2026 |
| 8-K |
Current report
Officer or director change
|
Jan 15, 2026 | Jan 13, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 17, 2025 | Dec 12, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 3, 2025 | Dec 3, 2025 |
| 8-K |
Current report
Other events
|
Oct 24, 2025 | Oct 20, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 22, 2025 | Oct 22, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 18, 2025 | Sep 18, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 19, 2025 | Aug 18, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 23, 2025 | Jul 23, 2025 |
| 8-K |
Current report
Officer or director change
|
Jul 22, 2025 | Jul 16, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 18, 2025 | Jul 17, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 1, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 5, 2025 | Jun 5, 2025 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 28, 2025 | May 28, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 23, 2025 | Apr 23, 2025 |
| 8-K |
Current report
Other events
|
Mar 18, 2025 | Mar 18, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 27, 2025 | Feb 27, 2025 |
| 8-K |
Current report
Officer or director change
|
Feb 25, 2025 | Feb 25, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 29, 2025 | Jan 29, 2025 |
| 8-K/A |
Amended current report
Regulation FD disclosure
|
Jan 17, 2025 | Jan 14, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 14, 2025 | Jan 14, 2025 |
| 8-K |
Current report
Other events
|
Dec 12, 2024 | Dec 12, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 11, 2024 | Dec 10, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
Oct 23, 2024 | Oct 22, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 30, 2024 | Aug 30, 2024 |
| 8-K |
Current report
Results of operations
|
Jul 24, 2024 | Jul 24, 2024 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
May 30, 2024 | May 29, 2024 |
| 8-K |
Current report
Results of operations
|
Apr 24, 2024 | Apr 24, 2024 |
| 8-K |
Current report
Results of operations
|
Apr 23, 2024 | Apr 23, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 1, 2024 | Feb 29, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 21, 2024 | Feb 21, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 5, 2024 | Jan 16, 2024 |
| 8-K |
Current report
Listing notice
|
Feb 1, 2024 | Feb 1, 2024 |
| 8-K |
Current report
Results of operations
|
Jan 31, 2024 | Jan 31, 2024 |
| 8-K |
Current report
Officer or director change
|
Dec 22, 2023 | Dec 19, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 21, 2023 | Dec 21, 2023 |
| 8-K |
Current report
Other events
|
Dec 18, 2023 | Dec 15, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 26, 2023 | Oct 26, 2023 |
| 8-K |
Current report
Results of operations
|
Oct 25, 2023 | Oct 25, 2023 |
| 8-K |
Current report
Officer or director change
|
Oct 25, 2023 | Oct 24, 2023 |
| 8-K |
Current report
Officer or director change
|
Jul 31, 2023 | Jul 26, 2023 |
| 8-K |
Current report
Results of operations
|
Jul 26, 2023 | Jul 26, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 14, 2023 | Jul 13, 2023 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Jun 1, 2023 | May 31, 2023 |
| 8-K |
Current report
Results of operations
|
Apr 20, 2023 | Apr 20, 2023 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Apr 18, 2023 | Apr 17, 2023 |
| 8-K |
Current report
Officer or director change
|
Apr 6, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
Jan 25, 2023 | Jan 25, 2023 |
| 8-K |
Current report
Other events
|
Dec 5, 2022 | Dec 5, 2022 |
| 8-K |
Current report
Officer or director change
|
Oct 27, 2022 | Oct 25, 2022 |
| 8-K |
Current report
Results of operations
|
Oct 26, 2022 | Oct 26, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 23, 2022 | Aug 23, 2022 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Jul 20, 2022 | Jul 18, 2022 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Jun 1, 2022 | Jun 1, 2022 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Apr 20, 2022 | Apr 19, 2022 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Apr 4, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 24, 2022 | Mar 21, 2022 |
| 8-K |
Current report
Results of operations
|
Jan 26, 2022 | Jan 26, 2022 |
| 8-K |
Current report
Officer or director change
|
Dec 28, 2021 | Dec 26, 2021 |
| 8-K |
Current report
Other events
|
Dec 13, 2021 | Dec 10, 2021 |
| 8-K |
Current report
Other events
|
Nov 22, 2021 | Nov 22, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 12, 2021 | Nov 12, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 1, 2021 | Nov 1, 2021 |
| 8-K |
Current report
Results of operations
|
Oct 20, 2021 | Oct 20, 2021 |
| 8-K |
Current report
Results of operations
|
Jul 21, 2021 | Jul 21, 2021 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Jun 3, 2021 | Jun 2, 2021 |
| 8-K |
Current report
Results of operations
|
Apr 21, 2021 | Apr 21, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 31, 2021 | Mar 29, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 4, 2021 | Mar 4, 2021 |
| 8-K |
Current report
Results of operations
|
Jan 28, 2021 | Jan 27, 2021 |
| 8-K |
Current report
Other events
|
Dec 9, 2020 | Dec 8, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 5, 2020 | Aug 5, 2020 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Jun 4, 2020 | Jun 3, 2020 |
| 8-K |
Current report
Other events
|
Mar 18, 2020 | Mar 18, 2020 |
| 8-K |
Current report
Results of operations
|
Jan 29, 2020 | Jan 29, 2020 |
| 8-K |
Current report
Other events
|
Dec 10, 2019 | Dec 9, 2019 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 31, 2019 | May 29, 2019 |
| 8-K |
Current report
Results of operations
|
Jan 30, 2019 | Jan 30, 2019 |
| 8-K |
Current report
Other events
|
Dec 11, 2018 | Dec 11, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 14, 2018 | Nov 14, 2018 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 31, 2018 | May 30, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 1, 2018 | Jan 31, 2018 |
| 8-K |
Current report
Other events
|
Dec 13, 2017 | Dec 12, 2017 |
| 8-K |
Current report
Other events
|
Jul 5, 2017 | Jul 3, 2017 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 25, 2017 | May 24, 2017 |
| 8-K |
Current report
Results of operations
|
Jan 26, 2017 | Jan 25, 2017 |
| 8-K |
Current report
Other events
|
Dec 14, 2016 | Dec 13, 2016 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 14, 2016 | Jun 13, 2016 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 25, 2016 | May 25, 2016 |
| 8-K |
Current report
Other events
|
Feb 3, 2016 | Feb 3, 2016 |
| 8-K |
Current report
Results of operations
|
Jan 27, 2016 | Jan 27, 2016 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 9, 2015 | Dec 8, 2015 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 27, 2015 | May 27, 2015 |
| 8-K |
Current report
Results of operations
|
Jan 28, 2015 | Jan 28, 2015 |
| 8-K |
Current report
Other events
|
Dec 10, 2014 | Dec 9, 2014 |
| 8-K |
Current report
Officer or director change
|
Oct 1, 2014 | Sep 30, 2014 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
May 21, 2014 | May 21, 2014 |
Showing 102 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.
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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.