Sei Investments Co (NASDAQ:SEIC) is held by 546 institutional investors per 13F filings through December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31 Mar, 2026 | 10,110,337 | 472,497 | 4.90% | $793,358,144.00 |
| LOOMIS SAYLES & CO L P | 31 Mar, 2026 | 8,628,879 | -115,755 | -1.32% | $677,108,102.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Mar, 2026 | 6,125,643 | 6,125,643 | 0.00% | $480,679,206.00 |
| Morgan Stanley | 31 Mar, 2026 | 4,792,279 | -282,899 | -5.57% | $376,050,359.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 4,741,716 | 4,741,716 | 0.00% | $372,082,455.00 |
| State Street Corp | 31 Mar, 2026 | 4,185,178 | -97,887 | -2.29% | $328,410,918.00 |
| Bank Of America Corp /De/ | 31 Mar, 2026 | 2,920,506 | -1,817 | -0.06% | $229,172,087.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 2,830,332 | -63,985 | -2.21% | $222,125,134.00 |
| LORD, ABBETT & CO. LLC | 31 Mar, 2026 | 2,204,379 | 287,009 | 14.97% | $172,978.00 |
| FMR LLC | 31 Mar, 2026 | 2,092,499 | 749,325 | 55.79% | $164,198,460.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Mar, 2026 | 1,873,198 | 20,054 | 1.08% | $146,983,892.00 |
| FIRST TRUST ADVISORS LP | 31 Mar, 2026 | 1,822,669 | 21,731 | 1.21% | $143,024,791.00 |
| Beutel, Goodman & Co Ltd. | 31 Mar, 2026 | 1,773,154 | -109,273 | -5.80% | $139,139.00 |
| Boston Partners | 31 Mar, 2026 | 1,770,039 | 1,770,039 | 0.00% | $138,887,658.00 |
| CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | 31 Mar, 2026 | 1,198,089 | -182,908 | -13.24% | $94,014,044.00 |
| Invesco Ltd. | 31 Mar, 2026 | 1,145,404 | -586,980 | -33.88% | $89,879,852.00 |
| Boston Trust Walden Corp | 31 Mar, 2026 | 1,039,731 | -45,059 | -4.15% | $81,587,687.00 |
| ROYCE & ASSOCIATES LP | 31 Mar, 2026 | 996,456 | 90,117 | 9.94% | $78,191,902.00 |
| Franklin Resources Inc | 31 Mar, 2026 | 983,113 | 164,419 | 20.08% | $77,144,877.00 |
| Bank of New York Mellon Corp | 31 Mar, 2026 | 936,302 | -54,349 | -5.49% | $73,471,656.00 |