SEI INVESTMENTS CO — All Filings
1,001 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
13F-HR
13F-HR/A
144
3
3/A
4
4/A
5
5/A
8-A12B
8-A12G
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
DEFS14A
N-PX
NT 11-K
PRES14A
RW
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-002291 | Mar 27, 2026 | — |
| 4 | FORM 4 | 0001628280-26-019667 | Mar 19, 2026 | Mar 18, 2026 |
| 4 | FORM 4 | 0001628280-26-017068 | Mar 12, 2026 | Mar 10, 2026 |
| 144 | — | 0001968582-26-000268 | Mar 10, 2026 | — |
| 8-K | 8-K | 0000350894-26-000015 | Mar 2, 2026 | — |
| 4 | FORM 4 | 0001628280-26-012076 | Feb 26, 2026 | Feb 25, 2026 |
| 144 | — | 0001921094-26-000201 | Feb 25, 2026 | — |
| 10-K | FORM 10-K | 0000350894-26-000013 | Feb 23, 2026 | Dec 31, 2025 |
| 13F-HR | — | 0000350894-26-000005 | Feb 13, 2026 | Dec 31, 2025 |
| SCHEDULE 13G/A | — | 0000312348-26-000013 | Feb 12, 2026 | — |
| 4 | FORM 4 | 0001628280-26-004505 | Feb 2, 2026 | Jan 29, 2026 |
| 144 | — | 0001921094-26-000065 | Jan 29, 2026 | — |
| 8-K | FORM 8-K | 0000350894-26-000003 | Jan 28, 2026 | — |
| 8-K | — | 0000929638-26-000165 | Jan 15, 2026 | Jan 13, 2026 |
| 4 | FORM 4 | 0001628280-26-000072 | Jan 2, 2026 | Jan 1, 2026 |
| 4 | FORM 4 | 0001628280-25-059102 | Dec 30, 2025 | — |
| 4 | FORM 4 | 0001628280-25-058909 | Dec 29, 2025 | Dec 5, 2025 |
| 4 | FORM 4 | 0001628280-25-058907 | Dec 29, 2025 | Dec 5, 2025 |
| 4 | FORM 4 | 0001628280-25-058905 | Dec 29, 2025 | Dec 5, 2025 |
| 4 | FORM 4 | 0001628280-25-058903 | Dec 29, 2025 | Dec 5, 2025 |
| 4 | FORM 4 | 0001628280-25-058901 | Dec 29, 2025 | Dec 5, 2025 |
| 4 | FORM 4 | 0001628280-25-058671 | Dec 23, 2025 | Dec 22, 2025 |
| 144 | — | 0001921094-25-001578 | Dec 22, 2025 | — |
| 8-K | FORM 8-K | 0000350894-25-000126 | Dec 17, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057376 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057374 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057373 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057371 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057369 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057367 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057342 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057341 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057340 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057339 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057338 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057337 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | FORM 4 | 0001628280-25-057336 | Dec 16, 2025 | Dec 12, 2025 |
| 4 | — | 0000929638-25-004524 | Dec 8, 2025 | Dec 4, 2025 |
| 4 | — | 0000929638-25-004512 | Dec 5, 2025 | Dec 3, 2025 |
| 144 | — | 0001921094-25-001456 | Dec 4, 2025 | — |
| 144 | — | 0001921094-25-001454 | Dec 3, 2025 | — |
| 8-K | FORM 8-K | 0000350894-25-000123 | Dec 3, 2025 | — |
| 4 | FORM 4 | 0001628280-25-052814 | Nov 18, 2025 | Nov 17, 2025 |
| 13F-HR | — | 0002048251-25-002343 | Nov 13, 2025 | Sep 30, 2025 |
| 4 | FORM 4 | 0001628280-25-051956 | Nov 13, 2025 | Nov 12, 2025 |
| SCHEDULE 13G/A | — | 0000312348-25-000034 | Nov 13, 2025 | — |
| 144 | — | 0001921094-25-001358 | Nov 12, 2025 | — |
| 144 | — | 0001921094-25-001345 | Nov 12, 2025 | — |
| 4 | FORM 4 | 0001628280-25-051435 | Nov 12, 2025 | Nov 11, 2025 |
| 4 | FORM 4 | 0001628280-25-046715 | Oct 28, 2025 | Oct 24, 2025 |