Institutional Ownership
Sei Invts Co
CUSIP 784117103COMSEICQ1 2026
13D / 13G Filings
25
Schedule 13D/13G on record
Beneficial Filers
7
Distinct reporting persons
Largest Stake
11.0%
Max % of class reported
Institutional Holders
554
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
25 filings · latest Feb 12, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 12, 2026 | Loomis, Sayles &Amp; Co., L.P. | 13G/A | 7.2% | 8.81M | SEC |
| 2 | Nov 13, 2025 | Loomis, Sayles &Amp; Co., L.P. | 13G/A | 7.3% | 8.98M | SEC |
| 3 | Aug 13, 2025 | Loomis, Sayles &Amp; Co., L.P. | 13G/A | 7.1% | 8.89M | SEC |
| 4 | Jul 16, 2025 | Blackrock, Inc. | 13G/A | 6.8% | 8.49M | SEC |
| 5 | May 15, 2025 | Loomis, Sayles &Amp; Co., L.P. | 13G/A | 6.9% | 8.72M | SEC |
| 6 | Feb 12, 2025 | Loomis, Sayles &Amp; Co., L.P. | 13G/A | 6.9% | 8.86M | SEC |
| 7 | Nov 14, 2024 | Loomis, Sayles &Amp; Co., L.P. | 13G/A | 7.0% | 9.15M | SEC |
| 8 | Nov 13, 2024 | Mari Shimokawa | 13G/A | 7.0% | 9.15M | SEC |
| 9 | Feb 13, 2024 | Vanguard Group Inc | 13G/A | 9.0% | 11.89M | SEC |
| 10 | Feb 13, 2024 | Loomis Sayles & Co L P | 13G/A | 7.2% | 9.49M | SEC |
15 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Sei Invts Co.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 10.11M | $793.36M |
| 2 | Loomis Sayles & Co L P | 8.63M | $677.11M |
| 3 | Morgan Stanley | 4.79M | $376.05M |
| 4 | State Street Corp | 4.19M | $328.41M |
| 5 | Bank Of America Corp /De/ | 2.92M | $229.17M |
| 6 | Geode Capital Management, LLC | 2.83M | $222.13M |
| 7 | Fmr LLC | 2.09M | $164.20M |
| 8 | Dimensional Fund Advisors LP | 1.87M | $146.98M |
| 9 | First Trust Advisors LP | 1.82M | $143.02M |
| 10 | Boston Partners | 1.77M | $138.89M |