Sei Investments Co (NASDAQ:SEIC) has 546 institutional investors that have filed 13F reports for the period ending December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 31 Dec, 2025 | 11,071,365 | -189,226 | -1.68% | $908,073,358.00 |
| BlackRock, Inc. | 31 Dec, 2025 | 10,110,337 | 472,497 | 4.90% | $793,358,144.00 |
| BlackRock, Inc. | 31 Dec, 2025 | 9,637,840 | 375,238 | 4.05% | $790,495,640.00 |
| LOOMIS SAYLES & CO L P | 31 Dec, 2025 | 8,744,634 | -231,415 | -2.58% | $717,234,871.00 |
| LOOMIS SAYLES & CO L P | 31 Dec, 2025 | 8,628,879 | -115,755 | -1.32% | $677,108,102.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Dec, 2025 | 6,125,643 | 6,125,643 | 0.00% | $480,679,206.00 |
| Morgan Stanley | 31 Dec, 2025 | 5,075,178 | -518,564 | -9.27% | $416,266,280.00 |
| Morgan Stanley | 31 Dec, 2025 | 4,792,279 | -282,899 | -5.57% | $376,050,359.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Dec, 2025 | 4,741,716 | 4,741,716 | 0.00% | $372,082,455.00 |
| State Street Corp | 31 Dec, 2025 | 4,283,065 | -253,517 | -5.59% | $353,493,250.00 |
| State Street Corp | 31 Dec, 2025 | 4,185,178 | -97,887 | -2.29% | $328,410,918.00 |
| Bank Of America Corp /De/ | 31 Dec, 2025 | 2,922,323 | -3,319,811 | -53.18% | $239,688,911.00 |
| Bank Of America Corp /De/ | 31 Dec, 2025 | 2,920,506 | -1,817 | -0.06% | $229,172,087.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Dec, 2025 | 2,894,317 | 109,974 | 3.95% | $237,420,996.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Dec, 2025 | 2,830,332 | -63,985 | -2.21% | $222,125,134.00 |
| LORD, ABBETT & CO. LLC | 31 Dec, 2025 | 2,204,379 | 287,009 | 14.97% | $172,978.00 |
| FMR LLC | 31 Dec, 2025 | 2,092,499 | 749,325 | 55.79% | $164,198,460.00 |
| LORD, ABBETT & CO. LLC | 31 Dec, 2025 | 1,917,370 | 308,988 | 19.21% | $157,263.00 |
| Beutel, Goodman & Co Ltd. | 31 Dec, 2025 | 1,882,427 | -140,523 | -6.95% | $154,396.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Dec, 2025 | 1,873,198 | 20,054 | 1.08% | $146,983,892.00 |