SEI Investments Co (SEIC) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for SEIC. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 563 institutions reported holding SEIC, with 90.1 million shares worth $7.9 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| Vanguard | 11,612,367 | $1.0B | DECREASED |
| BlackRock | 9,927,545 | $871M | DECREASED |
| Loomis Sayles & Co L P | 8,482,052 | $744M | DECREASED |
| State Street | 4,251,584 | $373M | INCREASED |
| Morgan Stanley | 4,119,203 | $361M | DECREASED |
Full institutional holdings, insider history, and congressional trades for SEI Investments Co on SentiSense.