Sei Investments Company · NASDAQ:SEIC
Sei Investments Company shareholders
As of Jun 30, 2026, 562 institutions reported holding Sei Investments Company, 75.4% of its shares. Largest: Vanguard, BlackRock and Loomis Sayles & Co L P. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Sei Investments Company | Change | Filed |
|---|---|---|---|---|
| Vanguard | 11.6M | 9.7% | −32,213 | Aug 13, 2026 |
| BlackRock | 9.93M | 8.3% | −183K | Aug 7, 2026 |
| Loomis Sayles & Co L P | 8.48M | 7.1% | −147K | Aug 14, 2026 |
| State Street | 4.25M | 3.5% | +66,406 | Aug 7, 2026 |
| Morgan Stanley | 4.12M | 3.4% | −673K | Aug 13, 2026 |
| Boston Partners | 3.09M | 2.6% | +1.32M | Aug 4, 2026 |
| Geode Capital | 2.95M | 2.5% | +123K | Aug 12, 2026 |
| Bank of America | 2.91M | 2.4% | −12,435 | Aug 14, 2026 |
| Fidelity | 2.51M | 2.1% | +418K | Aug 13, 2026 |
| Lord, Abbett & Co. LLC | 2.31M | 1.9% | +105K | Aug 14, 2026 |