Sei Investments CompanySEIC
13F holders, Q1 2025 (March 31)547holders +7
59new positions
50sold out
7famous investors
$77.58avg. 13F price*
At the end of Q1 2025, 547 institutions reported holding Sei Investments Company (SEIC) in their 13F filings, up 7 from Q4 2024. 59 opened new positions and 50 sold out. The largest holders were Vanguard Group Inc. ($889.7M), BlackRock, Inc. ($882.7M) and Loomis Sayles & Co. L P ($676.9M). 7 famous investors held it, including Tom Gayner (0.1% of Markel Group's portfolio), Israel Englander (0.1% of Millennium Management's portfolio) and Ray Dalio (0.1% of Bridgewater Associates's portfolio).
- Company
- Sei Investments Company
- CUSIP
- 784117103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 59 | $131.1M |
| Exits | 50 | $100.3M |
All 13F filers, Q4 2024 → Q1 2025: 7,690,084 shares bought and 5,216,096 shares sold, net +2,473,988 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 547 holders
| Vanguard Group Inc. | 0.02% | Reduce -1.2% | 11,461,187 | $889.7M |
| BlackRock, Inc. | 0.02% | Reduce -1.1% | 11,370,412 | $882.7M |
| Loomis Sayles & Co. L P | 0.98% | Reduce -1.3% | 8,720,051 | $676.9M |
| Morgan Stanley | 0.03% | Add +3.0% | 5,795,918 | $449.9M |
| State Street Corp. | 0.02% | Add +1.0% | 5,737,811 | $445.4M |
| Bank of America Corp. | 0.02% | Add +6.4% | 3,027,579 | $235.0M |
| Geode Capital Management, LLC | 0.02% | Add +4.1% | 2,687,583 | $208.3M |
| Beutel, Goodman & Co Ltd. | 1.20% | Add +0.4% | 2,675,610 | $207.7M |
| Dimensional Fund Advisors LP | 0.03% | Add +6.8% | 1,732,511 | $134.5M |
| Invesco Ltd. | 0.03% | Reduce -24.5% | 1,702,962 | $132.2M |
| First Trust Advisors LP | 0.11% | Add +227.9% | 1,582,545 | $122.9M |
| Boston Trust Walden Corp | 0.75% | Add +1.5% | 1,325,479 | $102.9M |
| Royce & Associates LP | 1.08% | Reduce -5.7% | 1,280,192 | $99.4M |
| Bank of New York Mellon Corp | 0.02% | Reduce -3.3% | 1,132,943 | $88.0M |
| Northern Trust Corp. | 0.01% | Reduce -1.3% | 1,053,848 | $81.8M |
| FMR LLC | 0.00% | Reduce -25.9% | 914,241 | $71.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.02% | Add +6.0% | 801,056 | $62.2M |
| Millennium Management | 0.06% | Add +339.3% | 783,619 | $60.8M |
| Amundi | 0.02% | Add +228.2% | 782,035 | $57.5M |
| Caisse de depot et placement du Quebec | 0.12% | Add +38.5% | 737,247 | $57.2M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +0.5% | 671,672 | $52.1M |
| Lord, Abbett & Co. LLC | 0.19% | New | 666,918 | $51.8M |
| Royal Bank of Canada | 0.01% | Add +61.6% | 625,919 | $48.6M |
| Voloridge Investment Management, LLC | 0.17% | Add +26.1% | 577,695 | $44.8M |
| Franklin Resources Inc. | 0.01% | Add +22.0% | 544,506 | $42.3M |
| Natixis Advisors, LLC | 0.08% | Reduce -1.9% | 538,464 | $41.8M |
| Norges Bank | 0.01% | Reduce -7.8% | 536,378 | $41.6M |
| Raymond James Financial Inc. | 0.02% | Add +3.2% | 532,195 | $41.3M |
| American Capital Management Inc. | 1.65% | Add +4.8% | 520,906 | $40.4M |
| Ameriprise Financial Inc. | 0.01% | Add +4.7% | 498,088 | $38.7M |
| JPMorgan Chase & Co. | 0.00% | Add +6.4% | 488,279 | $37.9M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.10% | Add +20.3% | 468,327 | $36.4M |
| Legal & General Group Plc | 0.01% | Add +0.6% | 402,270 | $31.2M |
| AQR Capital Management | 0.03% | Reduce -3.2% | 406,249 | $31.0M |
| UBS Group AG | 0.01% | Add +5.1% | 398,936 | $31.0M |
| Envestnet Asset Management Inc. | 0.01% | Reduce -2.8% | 395,285 | $30.7M |
| Prana Capital Management, LP | 1.21% | Add +28.4% | 383,961 | $29.8M |
| Danske Bank A/S | 0.09% | Add +62.1% | 374,235 | $29.1M |
| Azora Capital LP | 1.96% | New | 371,665 | $28.9M |
| Aware Super Pty Ltd as trustee of Aware Super | 0.48% | Add +26.3% | 363,058 | $28.2M |
| ProShare Advisors LLC | 0.06% | Reduce -19.9% | 361,680 | $28.1M |
| Man Group plc | 0.08% | Add +71.4% | 353,576 | $27.4M |
| HSBC Holdings PLC | 0.02% | Reduce -3.7% | 350,514 | $27.2M |
| Rhumbline Advisers | 0.02% | Reduce -0.4% | 336,554 | $26.1M |
| Teacher Retirement System of Texas | 0.10% | Add +22.6% | 317,599 | $24.7M |
| Alps Advisors Inc. | 0.13% | Add +9.7% | 278,328 | $21.6M |
| JLB & Associates Inc. | 3.00% | Reduce -1.6% | 276,604 | $21.5M |
| Retirement Systems of Alabama | 0.08% | Reduce -0.7% | 276,324 | $21.5M |
| Nuveen, LLC | 0.01% | — | 275,763 | $21.4M |
| Arrowstreet Capital, Limited Partnership | 0.02% | Reduce -9.6% | 273,979 | $21.3M |
| KBC Group NV | 0.07% | Reduce -25.6% | 273,206 | $21.2M |
| Interval Partners, LP | 0.69% | Add +26.4% | 252,191 | $19.6M |
| Acadian Asset Management LLC | 0.06% | Reduce -28.4% | 251,081 | $19.5M |
| Jane Street Group, LLC | 0.03% | Add +169.9% | 242,339 | $18.8M |
| Qube Research & Technologies Ltd | 0.03% | Reduce -12.2% | 238,493 | $18.5M |
| Martingale Asset Management L P | 0.46% | Add +0.4% | 231,643 | $18.0M |
| Principal Financial Group Inc. | 0.01% | Reduce -1.3% | 231,039 | $17.9M |
| Sumitomo Mitsui Trust Group, Inc. | 0.01% | Add +0.4% | 220,410 | $17.1M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -1.3% | 219,699 | $17.1M |
| Deutsche Bank AG | 0.01% | Add +41.9% | 216,212 | $16.8M |
| Jacobs Levy Equity Management, Inc. | 0.06% | New | 208,353 | $16.2M |
| Crestwood Advisors Group, LLC | 0.31% | Reduce -0.5% | 207,973 | $16.1M |
| Leith Wheeler Investment Counsel Ltd. | 1.11% | Add +1.3% | 205,809 | $16.0M |
| State of Alaska, Department of Revenue | 0.18% | Add +0.1% | 199,330 | $15.5M |
| Renaissance Technologies | 0.02% | Add +180.9% | 197,826 | $15.4M |
| Allianz Asset Management GmbH | 0.02% | Reduce -15.9% | 193,753 | $15.0M |
| Los Angeles Capital Management LLC | 0.06% | Reduce -42.4% | 186,416 | $14.5M |
| Russell Investments Group, Ltd. | 0.02% | Add +68.0% | 179,622 | $13.9M |
| Vestcor Inc | 0.46% | Reduce -4.4% | 176,788 | $13.7M |
| Victory Capital Management Inc. | 0.01% | Add +6.5% | 174,651 | $13.6M |
| Markel Group | 0.12% | No change | 173,200 | $13.4M |
| KLP Kapitalforvaltning As | 0.06% | No change | 162,300 | $12.6M |
| California Public Employees Retirement System | 0.01% | Reduce -0.5% | 159,267 | $12.4M |
| Achmea Investment Management B.V. | 0.17% | Add +86.6% | 154,627 | $12.0M |
| Schroder Investment Management Group | 0.01% | Add +2.0% | 149,103 | $11.5M |
| Bridgewater Associates | 0.05% | Add +241.5% | 146,580 | $11.4M |
| TD Asset Management Inc | 0.01% | Add +4.0% | 144,964 | $11.3M |
| State Board of Administration of Florida Retirement System | 0.02% | No change | 142,437 | $11.1M |
| Foyston, Gordon & Payne Inc | 2.72% | Add +18.4% | 141,742 | $11.0M |
| Candriam S.C.A. | 0.07% | Add +238.3% | 135,207 | $10.5M |
| Bank of Montreal | 0.01% | Reduce -2.6% | 134,619 | $10.5M |
| California State Teachers Retirement System | 0.01% | Add +1.1% | 131,961 | $10.2M |
| Thrivent Financial for Lutherans | 0.02% | Reduce -23.7% | 131,408 | $10.2M |
| Osaic Holdings, Inc. | 0.02% | Add +6.0% | 130,212 | $10.1M |
| Alliancebernstein L.P. | 0.00% | Reduce -24.7% | 127,388 | $9.9M |
| Pinebridge Investments, L.P. | 0.08% | Reduce -6.4% | 124,517 | $9.7M |
| New York State Teachers Retirement System | 0.02% | Reduce -0.5% | 117,969 | $9.2M |
| Truist Financial Corp. | 0.01% | Reduce -3.6% | 115,642 | $9.0M |
| Barclays PLC | 0.00% | Reduce -20.5% | 115,587 | $9.0M |
| Hahn Capital Management LLC | 4.32% | Reduce -9.4% | 114,963 | $8.9M |
| Korea Investment CORP | 0.02% | Reduce -39.5% | 114,684 | $8.9M |
| Abn Amro Investment Solutions | 0.18% | Add +25.8% | 110,600 | $8.6M |
| Banco Santander, S.A. | 0.09% | Add +158.5% | 107,467 | $8.3M |
| Holocene Advisors, LP | 0.02% | Add +41.9% | 106,626 | $8.3M |
| Corebridge Financial, Inc. | 0.05% | Reduce -3.9% | 106,499 | $8.3M |
| King Luther Capital Management Corp. | 0.04% | Add +228.6% | 105,371 | $8.2M |
| ExodusPoint Capital Management, LP | 0.11% | Add +71.1% | 103,604 | $8.0M |
| Robeco Institutional Asset Management B.V. | 0.02% | Add +1.0% | 102,105 | $7.9M |
| American Century Companies Inc. | 0.00% | Reduce -51.3% | 99,318 | $7.7M |
| Mitsubishi UFJ Trust & Banking Corp | 0.02% | Reduce -24.1% | 97,573 | $7.6M |
"% of holder's portfolio" is SEIC's weight in each manager's 13F, not the share of Sei Investments Company the manager owns.