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
10-Q Quarterly report Oct 26, 2026 Sep 30, 2026
8-K Current report
Results of operations, Regulation FD disclosure, Other events
 Oct 21, 2026 Oct 21, 2026
N-PX Filing Aug 27, 2026 Jun 30, 2026
10-Q Quarterly report Jul 27, 2026 Jun 30, 2026
8-K Current report
Results of operations, Regulation FD disclosure
 Jul 22, 2026 Jul 22, 2026
11-K Employee savings plan report Jun 23, 2026 Dec 31, 2025
8-K Current report
Shareholder vote results, Other events
 May 28, 2026 May 27, 2026
10-Q Quarterly report Apr 27, 2026 Mar 31, 2026
8-K Current report
Results of operations, Regulation FD disclosure
 Apr 22, 2026 Apr 22, 2026
ARS Annual report to shareholders Apr 15, 2026 Dec 31, 2025
DEF 14A Proxy statement Apr 15, 2026 May 27, 2026
8-K Current report
Regulation FD disclosure
 Mar 2, 2026 Mar 2, 2026
10-K Annual report Feb 23, 2026 Dec 31, 2025
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
10-Q Quarterly report Oct 27, 2025 Sep 30, 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
N-PX Filing Aug 25, 2025 Jun 30, 2025
8-K Current report
Material agreement, New debt
 Aug 19, 2025 Aug 18, 2025
10-Q Quarterly report Jul 28, 2025 Jun 30, 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
11-K Employee savings plan report Jun 24, 2025 Dec 31, 2024
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
DEFA14A Additional proxy material May 7, 2025 —
10-Q Quarterly report Apr 28, 2025 Mar 31, 2025
8-K Current report
Results of operations, Regulation FD disclosure
 Apr 23, 2025 Apr 23, 2025
ARS Annual report to shareholders Apr 14, 2025 Dec 31, 2024
DEF 14A Proxy statement Apr 14, 2025 May 28, 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
10-K Annual report Feb 20, 2025 Dec 31, 2024
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
10-Q Quarterly report Oct 25, 2024 Sep 30, 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
N-PX Filing Aug 21, 2024 Jun 30, 2024
S-8 Employee stock plan registration Jul 26, 2024 —
10-Q Quarterly report Jul 26, 2024 Jun 30, 2024
8-K Current report
Results of operations
 Jul 24, 2024 Jul 24, 2024
11-K Employee savings plan report Jun 18, 2024 Dec 31, 2023
8-K Current report
Officer or director change, Shareholder vote results, Other events
 May 30, 2024 May 29, 2024
10-Q Quarterly report Apr 29, 2024 Mar 31, 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
ARS Annual report to shareholders Apr 16, 2024 Dec 31, 2023
DEF 14A Proxy statement Apr 15, 2024 May 29, 2024
8-K Current report
Officer or director change
 Mar 1, 2024 Feb 29, 2024
10-K/A Amended annual report Feb 22, 2024 Dec 31, 2023
8-K Current report
Regulation FD disclosure
 Feb 21, 2024 Feb 21, 2024
10-K Annual report Feb 20, 2024 Dec 31, 2023
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
10-Q Quarterly report Oct 27, 2023 Sep 30, 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
10-Q Quarterly report Jul 28, 2023 Jun 30, 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
11-K Employee savings plan report Jun 22, 2023 Dec 31, 2022
8-K Current report
Shareholder vote results, Other events
 Jun 1, 2023 May 31, 2023
10-Q Quarterly report Apr 24, 2023 Mar 31, 2023
8-K Current report
Results of operations
 Apr 20, 2023 Apr 20, 2023
ARS Annual report to shareholders Apr 20, 2023 Dec 31, 2022
DEF 14A Proxy statement 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
10-K/A Amended annual report Feb 24, 2023 Dec 31, 2022
10-K Annual report Feb 21, 2023 Dec 31, 2022
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
10-Q Quarterly report Oct 28, 2022 Sep 30, 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
10-Q Quarterly report Jul 25, 2022 Jun 30, 2022
8-K Current report
Results of operations, Officer or director change
 Jul 20, 2022 Jul 18, 2022
11-K Employee savings plan report Jun 28, 2022 Dec 31, 2021
8-K Current report
Shareholder vote results, Other events
 Jun 1, 2022 Jun 1, 2022
10-Q/A Amended quarterly report Apr 29, 2022 Mar 31, 2022
DEF 14A Proxy statement Apr 27, 2022 Jun 1, 2022
10-Q Quarterly report Apr 25, 2022 Mar 31, 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
10-K Annual report Feb 22, 2022 Dec 31, 2021
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
10-Q Quarterly report Oct 25, 2021 Sep 30, 2021
8-K Current report
Results of operations
 Oct 20, 2021 Oct 20, 2021
10-Q Quarterly report Jul 26, 2021 Jun 30, 2021
8-K Current report
Results of operations
 Jul 21, 2021 Jul 21, 2021
11-K Employee savings plan report Jun 28, 2021 Dec 31, 2020
8-K Current report
Shareholder vote results, Other events
 Jun 3, 2021 Jun 2, 2021
DEF 14A Proxy statement Apr 27, 2021 Jun 2, 2021
10-Q Quarterly report Apr 26, 2021 Mar 31, 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
10-K Annual report Feb 22, 2021 Dec 31, 2020
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
10-Q Quarterly report Oct 26, 2020 Sep 30, 2020
8-K Current report
Regulation FD disclosure
 Aug 5, 2020 Aug 5, 2020
10-Q Quarterly report Jul 28, 2020 Jun 30, 2020
11-K Employee savings plan report Jun 19, 2020 Dec 31, 2019
8-K Current report
Shareholder vote results, Other events
 Jun 4, 2020 Jun 3, 2020
DEFA14A Additional proxy material May 14, 2020 —
10-Q Quarterly report Apr 28, 2020 Mar 31, 2020
DEF 14A Proxy statement Apr 23, 2020 Jun 3, 2020
8-K Current report
Other events
 Mar 18, 2020 Mar 18, 2020
10-K Annual report Feb 24, 2020 Dec 31, 2019
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
10-Q Quarterly report Oct 24, 2019 Sep 30, 2019
10-Q Quarterly report Jul 25, 2019 Jun 30, 2019
11-K Employee savings plan report Jun 21, 2019 Dec 31, 2018
8-K Current report
Shareholder vote results, Other events
 May 31, 2019 May 29, 2019
10-Q Quarterly report Apr 25, 2019 Mar 31, 2019
DEF 14A Proxy statement Apr 17, 2019 May 29, 2019
10-K Annual report Feb 25, 2019 Dec 31, 2018
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
10-Q Quarterly report Oct 25, 2018 Sep 30, 2018
10-Q Quarterly report Jul 24, 2018 Jun 30, 2018
11-K Employee savings plan report Jun 22, 2018 Dec 31, 2017
8-K Current report
Shareholder vote results, Other events
 May 31, 2018 May 30, 2018
10-Q Quarterly report Apr 26, 2018 Mar 31, 2018
DEF 14A Proxy statement Apr 10, 2018 May 30, 2018
10-K Annual report Feb 22, 2018 Dec 31, 2017
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
10-Q Quarterly report Oct 26, 2017 Sep 30, 2017
10-Q Quarterly report Jul 27, 2017 Jun 30, 2017
8-K Current report
Other events
 Jul 5, 2017 Jul 3, 2017
11-K Employee savings plan report Jun 28, 2017 Dec 31, 2016
8-K Current report
Shareholder vote results, Other events
 May 25, 2017 May 24, 2017
DEFA14A Additional proxy material Apr 24, 2017 —
10-Q Quarterly report Apr 20, 2017 Mar 31, 2017
DEF 14A Proxy statement Apr 5, 2017 May 24, 2017
10-K Annual report Feb 22, 2017 Dec 31, 2016
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
10-Q Quarterly report Oct 21, 2016 Sep 30, 2016
10-Q Quarterly report Jul 27, 2016 Jun 30, 2016
11-K Employee savings plan report Jun 24, 2016 Dec 31, 2015
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
10-Q Quarterly report Apr 20, 2016 Mar 31, 2016
DEF 14A Proxy statement Apr 5, 2016 May 25, 2016
10-K Annual report Feb 22, 2016 Dec 31, 2015
UPLOAD Letter from the SEC Feb 5, 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
CORRESP Letter to the SEC Jan 14, 2016 —
CORRESP Letter to the SEC Dec 9, 2015 —
8-K Current report
Officer or director change, Other events
 Dec 9, 2015 Dec 8, 2015
UPLOAD Letter from the SEC Dec 1, 2015 —
10-Q Quarterly report Oct 21, 2015 Sep 30, 2015
10-Q Quarterly report Jul 22, 2015 Jun 30, 2015
11-K Employee savings plan report Jun 29, 2015 Dec 31, 2014
8-K Current report
Shareholder vote results, Other events
 May 27, 2015 May 27, 2015
10-Q Quarterly report Apr 22, 2015 Mar 31, 2015
DEF 14A Proxy statement Apr 9, 2015 May 27, 2015
10-K Annual report Feb 23, 2015 Dec 31, 2014
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
10-Q Quarterly report Oct 23, 2014 Sep 30, 2014
8-K Current report
Officer or director change
 Oct 1, 2014 Sep 30, 2014
S-8 Employee stock plan registration Jul 24, 2014 —
10-Q Quarterly report Jul 23, 2014 Jun 30, 2014
11-K Employee savings plan report Jun 20, 2014 Dec 31, 2013
8-K Current report
Officer or director change, Shareholder vote results, Other events
 May 21, 2014 May 21, 2014
10-Q Quarterly report Apr 23, 2014 Mar 31, 2014
DEF 14A Proxy statement Apr 11, 2014 May 21, 2014

Showing 198 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.