# SEI Investments Co: filings

SEIC · Nasdaq · CIK 350894 · [Financials](/sectors/financials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/seic.md) · [Financials](/companies/seic/financials.md) · [Filings](/companies/seic/filings.md) · [Insiders](/companies/seic/insiders.md)

## Reports and events: 234 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 828, 8-K 138, 144 77, 10-Q 54, 13F-HR 47, SC 13G/A 39, 4/A 36, 10-K 18, 11-K 18, 3 18, DEF 14A 18, UPLOAD 14, CORRESP 12, SCHEDULE 13G/A 11, 13F-HR/A 7, SC 13G 6, 3/A 5, ARS 4, 5 3, DEFA14A 3, N-PX 3, 10-K/A 2, 8-K/A 2, S-8 2, SCHEDULE 13G 2, 10-Q/A 1, 8-A12B 1, SC 13D/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-26 | 14:19 ET | [10-Q](/filings/0000350894-26-000058.md) | Quarterly report, period 2026-09-30 | 0000350894-26-000058 |
| 2026-10-21 | 16:06 ET | [8-K](/filings/0000350894-26-000051.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-26-000051 |
| 2026-07-27 | 15:00 ET | [10-Q](/filings/0000350894-26-000048.md) | Quarterly report, period 2026-06-30 | 0000350894-26-000048 |
| 2026-07-22 | 16:03 ET | [8-K](/filings/0000350894-26-000044.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-26-000044 |
| 2026-05-28 | 10:57 ET | [8-K](/filings/0000350894-26-000033.md) | 5.07 Shareholder vote results; 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-26-000033 |
| 2026-04-27 | 14:45 ET | [10-Q](/filings/0000350894-26-000030.md) | Quarterly report, period 2026-03-31 | 0000350894-26-000030 |
| 2026-04-22 | 16:03 ET | [8-K](/filings/0000350894-26-000026.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-26-000026 |
| 2026-04-15 | 16:06 ET | [DEF 14A](/filings/0000350894-26-000021.md) | Proxy statement, period 2026-05-27 | 0000350894-26-000021 |
| 2026-03-02 | 16:01 ET | [8-K](/filings/0000350894-26-000015.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-26-000015 |
| 2026-02-23 | 15:53 ET | [10-K](/filings/0000350894-26-000013.md) | Annual report, period 2025-12-31 | 0000350894-26-000013 |
| 2026-01-28 | 16:03 ET | [8-K](/filings/0000350894-26-000003.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-26-000003 |
| 2026-01-15 | 16:20 ET | [8-K](/filings/0000929638-26-000165.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000929638-26-000165 |
| 2025-12-17 | 08:32 ET | [8-K](/filings/0000350894-25-000126.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-25-000126 |
| 2025-12-03 | 16:41 ET | [8-K](/filings/0000350894-25-000123.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000123 |
| 2025-10-27 | 14:34 ET | [10-Q](/filings/0000350894-25-000120.md) | Quarterly report, period 2025-09-30 | 0000350894-25-000120 |
| 2025-10-24 | 16:29 ET | [8-K](/filings/0000350894-25-000115.md) | 8.01 Other events | 0000350894-25-000115 |
| 2025-10-22 | 16:02 ET | [8-K](/filings/0000350894-25-000113.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000113 |
| 2025-09-18 | 07:33 ET | [8-K](/filings/0000350894-25-000109.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000109 |
| 2025-08-19 | 16:09 ET | [8-K](/filings/0000350894-25-000106.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0000350894-25-000106 |
| 2025-07-28 | 14:16 ET | [10-Q](/filings/0000350894-25-000104.md) | Quarterly report, period 2025-06-30 | 0000350894-25-000104 |
| 2025-07-23 | 16:04 ET | [8-K](/filings/0000350894-25-000097.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000097 |
| 2025-07-22 | 16:55 ET | [8-K](/filings/0000350894-25-000095.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000350894-25-000095 |
| 2025-07-18 | 08:05 ET | [8-K](/filings/0000350894-25-000092.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000092 |
| 2025-07-01 | 09:08 ET | [8-K](/filings/0000350894-25-000088.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000088 |
| 2025-06-05 | 10:01 ET | [8-K](/filings/0000350894-25-000078.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000078 |
| 2025-05-28 | 16:07 ET | [8-K](/filings/0000350894-25-000076.md) | 5.07 Shareholder vote results; 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-25-000076 |
| 2025-04-28 | 13:57 ET | [10-Q](/filings/0000350894-25-000071.md) | Quarterly report, period 2025-03-31 | 0000350894-25-000071 |
| 2025-04-23 | 16:06 ET | [8-K](/filings/0000350894-25-000065.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000065 |
| 2025-04-14 | 17:01 ET | [DEF 14A](/filings/0000350894-25-000060.md) | Proxy statement, period 2025-05-28 | 0000350894-25-000060 |
| 2025-03-18 | 13:41 ET | [8-K](/filings/0000350894-25-000040.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-25-000040 |
| 2025-02-27 | 10:16 ET | [8-K](/filings/0000350894-25-000032.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000032 |
| 2025-02-25 | 12:00 ET | [8-K](/filings/0000350894-25-000030.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000350894-25-000030 |
| 2025-02-20 | 14:38 ET | [10-K](/filings/0000350894-25-000028.md) | Annual report, period 2024-12-31 | 0000350894-25-000028 |
| 2025-01-29 | 16:07 ET | [8-K](/filings/0000350894-25-000016.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000016 |
| 2025-01-17 | 16:18 ET | [8-K/A](/filings/0000350894-25-000012.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000012 |
| 2025-01-14 | 12:37 ET | [8-K](/filings/0000350894-25-000007.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-25-000007 |
| 2024-12-12 | 16:08 ET | [8-K](/filings/0000350894-24-000153.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-24-000153 |
| 2024-12-11 | 09:06 ET | [8-K](/filings/0000350894-24-000150.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-24-000150 |
| 2024-10-25 | 12:15 ET | [10-Q](/filings/0000350894-24-000131.md) | Quarterly report, period 2024-09-30 | 0000350894-24-000131 |
| 2024-10-23 | 16:08 ET | [8-K](/filings/0000350894-24-000127.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-24-000127 |
| 2024-08-30 | 16:38 ET | [8-K](/filings/0000350894-24-000115.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000350894-24-000115 |
| 2024-07-26 | 12:12 ET | [10-Q](/filings/0000350894-24-000102.md) | Quarterly report, period 2024-06-30 | 0000350894-24-000102 |
| 2024-07-24 | 16:04 ET | [8-K](/filings/0000350894-24-000099.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000350894-24-000099 |
| 2024-05-30 | 14:08 ET | [8-K](/filings/0000350894-24-000090.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 8.01 Other events; 9.01 Financial statements and exhibits | 0000350894-24-000090 |
| 2024-04-29 | 12:43 ET | [10-Q](/filings/0000350894-24-000084.md) | Quarterly report, period 2024-03-31 | 0000350894-24-000084 |
| 2024-04-24 | 16:04 ET | [8-K](/filings/0000350894-24-000078.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000350894-24-000078 |
| 2024-04-23 | 08:29 ET | [8-K](/filings/0000350894-24-000076.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000350894-24-000076 |
| 2024-04-15 | 16:01 ET | [DEF 14A](/filings/0000350894-24-000066.md) | Proxy statement, period 2024-05-29 | 0000350894-24-000066 |
| 2024-03-01 | 16:45 ET | [8-K](/filings/0000350894-24-000037.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000350894-24-000037 |
| 2024-02-22 | 12:30 ET | [10-K/A](/filings/0000350894-24-000030.md) | Annual report, amended, period 2023-12-31 | 0000350894-24-000030 |

Page 1 of 5. [Older](/companies/seic/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 27, 2026, 17:32 ET. No prices; not investment advice.