SEI Investments Co
SEIC- Exchange
- Nasdaq
- Industry
- Security Brokers, Dealers & Flotation Companies
- SEC CIK
- 0000350894
In the last 90 days, SEI Investments Co insiders filed 0 open-market purchases and 10 sales; 575 institutions reported holding it in 13F filings for Q2 2026, worth $7.94B in total; Markel Group is the only superinvestor holding it.
13F holders, Q4 2025
Institutional positions in SEI Investments Co as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 562
- +24 vs. Q3 2025
- Shares held
- 89.1M
- +699.0K (+0.8%) vs. Q3 2025
- Total value
- $7.31B
- −$184.7M (−2.5%) vs. Q3 2025
- New holders
- 81
- 199 more added
- Sold out
- 57
- 192 more reduced
12 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SEIC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 575 | $7.94B |
| Q1 2026 | 569 | $7.06B |
| Q4 2025 | 562 | $7.31B |
| Q3 2025 | 550 | $7.51B |
| Q2 2025 | 564 | $8.09B |
| Q1 2025 | 546 | $7.27B |
| Q4 2024 | 540 | $7.52B |
| Q3 2024 | 502 | $6.35B |
| Q2 2024 | 493 | $6.02B |
| Q1 2024 | 475 | $6.77B |
| Q4 2023 | 491 | $5.90B |
| Q3 2023 | 462 | $5.63B |
| Q2 2023 | 458 | $5.53B |
| Q1 2023 | 444 | $5.36B |
| Q4 2022 | 446 | $5.45B |
| Q3 2022 | 433 | $4.63B |
| Q2 2022 | 456 | $5.18B |
| Q1 2022 | 465 | $5.81B |
| Q4 2021 | 472 | $5.94B |
| Q3 2021 | 446 | $5.73B |
| Q2 2021 | 440 | $6.04B |
| Q1 2021 | 443 | $5.97B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 11,071,365 | $908.1M | 0.01% | −189,226−1.7% | Reduced |
| BlackRock, Inc. | 9,637,840 | $790.5M | 0.01% | +375,238+4.1% | Added |
| Loomis Sayles & Co L P | 8,744,634 | $717.2M | 0.86% | −231,415−2.6% | Reduced |
| Morgan Stanley | 5,075,178 | $416.3M | 0.02% | −518,564−9.3% | Reduced |
| State Street Corp | 4,283,065 | $353.5M | 0.01% | −253,517−5.6% | Reduced |
| Bank of America Corp | 2,922,323 | $239.7M | 0.02% | −198,744−6.4% | Reduced |
| Geode Capital Management, LLC | 2,894,317 | $237.4M | 0.01% | +109,974+3.9% | Added |
| Lord, Abbett & Co. LLC | 1,917,370 | $157.3M | 0.48% | +308,988+19.2% | Added |
| Beutel, Goodman & Co Ltd. | 1,882,427 | $154.4M | 0.95% | −140,523−6.9% | Reduced |
| Dimensional Fund Advisors LP | 1,853,144 | $152.0M | 0.03% | −9,908−0.5% | Reduced |
| First Trust Advisors LP | 1,800,938 | $147.7M | 0.11% | +75,919+4.4% | Added |
| Invesco Ltd. | 1,732,384 | $142.1M | 0.01% | +8610.0% | Added |
| Caisse de Depot Et Placement du Quebec | 1,380,997 | $113.3M | 0.19% | +37,240+2.8% | Added |
| FMR LLC | 1,343,174 | $110.2M | 0.01% | −6,456−0.5% | Reduced |
| Boston Trust Walden Corp | 1,084,790 | $89.0M | 0.67% | −20,619−1.9% | Reduced |
| Bank of New York Mellon Corp | 990,651 | $81.3M | 0.01% | −23,260−2.3% | Reduced |
| Royce & Associates LP | 906,339 | $74.3M | 0.75% | +2,756+0.3% | Added |
| Northern Trust Corp | 891,476 | $73.1M | 0.01% | −31,144−3.4% | Reduced |
| Ameriprise Financial Inc | 821,461 | $67.4M | 0.02% | +5,767+0.7% | Added |
| Franklin Resources Inc | 818,694 | $67.1M | 0.02% | +180,208+28.2% | Added |
| Charles Schwab Investment Management Inc | 664,349 | $54.5M | 0.01% | +1,891+0.3% | Added |
| Norges Bank | 652,868 | $53.5M | 0.01% | +652,868 | New |
| Prana Capital Management, LP | 651,166 | $53.4M | 1.94% | −60,145−8.5% | Reduced |
| Clark Capital Management Group, Inc. | 645,859 | $53.0M | 0.33% | +619,315+2,333.2% | Added |
| UBS Group AG | 636,192 | $52.2M | 0.01% | +192,470+43.4% | Added |
| Royal Bank of Canada | 611,174 | $50.1M | 0.01% | −339,908−35.7% | Reduced |
| American Capital Management Inc | 574,819 | $47.1M | 2.08% | +9,702+1.7% | Added |
| Qube Research & Technologies Ltd | 563,212 | $46.2M | 0.07% | −203,563−26.5% | Reduced |
| Raymond James Financial Inc | 532,358 | $43.7M | 0.01% | +4,044+0.8% | Added |
| PFA Pension, Forsikringsaktieselskab | 519,312 | $43.2M | 0.12% | +519,312 | New |
| Natixis Advisors, L.P. | 470,476 | $38.6M | 0.05% | −40,590−7.9% | Reduced |
| Arrowstreet Capital, Limited Partnership | 463,646 | $38.0M | 0.02% | +133,676+40.5% | Added |
| UBS Asset Management Americas Inc | 454,136 | $37.2M | 0.01% | −429,617−48.6% | Reduced |
| AQR Capital Management LLC | 451,873 | $37.1M | 0.02% | −15,471−3.3% | Reduced |
| JPMorgan Chase & Co | 433,470 | $35.6M | 0.00% | +52,336+13.7% | Added |
| Envestnet Asset Management Inc | 427,787 | $35.1M | 0.01% | +66,351+18.4% | Added |
| ProShare Advisors LLC | 405,354 | $33.2M | 0.06% | +15,733+4.0% | Added |
| Renaissance Technologies LLC | 397,226 | $32.6M | 0.05% | +10,300+2.7% | Added |
| Victory Capital Management Inc | 382,841 | $31.4M | 0.02% | +247,679+183.2% | Added |
| Voloridge Investment Management, LLC | 378,214 | $31.0M | 0.11% | −28,023−6.9% | Reduced |
| Millennium Management LLC | 371,635 | $30.5M | 0.02% | −284,054−43.3% | Reduced |
| Bridgewater Associates, LP | 345,877 | $28.4M | 0.10% | +83,375+31.8% | Added |
| Man Group plc | 333,568 | $27.4M | 0.05% | +19,374+6.2% | Added |
| Goldman Sachs Group Inc | 319,208 | $26.2M | 0.00% | +78,858+32.8% | Added |
| Barclays PLC | 311,803 | $25.6M | 0.01% | +156,400+100.6% | Added |
| Thrivent Financial for Lutherans | 311,567 | $25.6M | 0.05% | +59,336+23.5% | Added |
| Rhumbline Advisers | 309,335 | $25.4M | 0.02% | −16,905−5.2% | Reduced |
| Retirement Systems of Alabama | 287,932 | $23.6M | 0.08% | −1,919−0.7% | Reduced |
| Arbejdsmarkedets Tillaegspension | 285,176 | $23.4M | 0.60% | +285,176 | New |
| JLB & Associates Inc | 260,197 | $21.3M | 2.88% | −6,347−2.4% | Reduced |
| Alps Advisors Inc | 223,077 | $18.3M | 0.11% | −13,299−5.6% | Reduced |
| Azora Capital LP | 216,465 | $17.8M | 1.12% | +216,465 | New |
| Swiss National Bank | 207,100 | $17.0M | 0.01% | +2,000+1.0% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 204,267 | $16.8M | 0.04% | +153,472+302.1% | Added |
| Principal Financial Group Inc | 200,362 | $16.4M | 0.01% | −8,626−4.1% | Reduced |
| Leith Wheeler Investment Counsel Ltd. | 196,383 | $16.1M | 1.21% | −6,922−3.4% | Reduced |
| California Public Employees Retirement System | 193,650 | $15.9M | 0.01% | −5,472−2.7% | Reduced |
| Legal & General Group Plc | 190,243 | $15.6M | 0.00% | −39,742−17.3% | Reduced |
| Interval Partners, LP | 184,896 | $15.2M | 0.35% | −19,018−9.3% | Reduced |
| HSBC Holdings PLC | 180,716 | $14.9M | 0.01% | +117,400+185.4% | Added |
| Brandywine Global Investment Management, LLC | 179,610 | $14.7M | 0.10% | +13,293+8.0% | Added |
| Public Employees Retirement Association of Colorado | 178,435 | $14.6M | 0.05% | 00.0% | Unchanged |
| Vestcor Inc | 174,337 | $14.3M | 0.41% | 00.0% | Unchanged |
| Nuveen, LLC | 173,330 | $14.2M | 0.00% | −62,783−26.6% | Reduced |
| Markel Group Inc.SuperinvestorMarkel Group | 173,200 | $14.2M | 0.11% | 00.0% | Unchanged |
| Foyston, Gordon, & Payne Inc | 172,580 | $14.2M | 3.08% | +17,067+11.0% | Added |
| Citadel Advisors LLC | 152,276 | $12.5M | 0.01% | −54,422−26.3% | Reduced |
| Advisor Group Holdings, Inc. | 150,076 | $12.3M | 0.02% | +5,857+4.1% | Added |
| Rockefeller Capital Management L.P. | 150,008 | $12.3M | 0.02% | +30,122+25.1% | Added |
| Janney Montgomery Scott LLC | 148,911 | $12.2M | 0.03% | +9,624+6.9% | Added |
| LPL Financial LLC | 148,123 | $12.1M | 0.00% | +35,568+31.6% | Added |
| Schonfeld Strategic Advisors LLC | 147,300 | $12.1M | 0.06% | −8,088−5.2% | Reduced |
| King Luther Capital Management Corp | 137,439 | $11.3M | 0.05% | +12,713+10.2% | Added |
| Jane Street Group, LLC | 137,237 | $11.3M | 0.01% | +26,921+24.4% | Added |
| M&G Plc | 134,004 | $11.0M | 0.06% | +11,496+9.4% | Added |
| Toroso Investments, LLC | 133,322 | $10.9M | 0.05% | +28,135+26.7% | Added |
| American Century Companies Inc | 128,507 | $10.5M | 0.01% | +16,370+14.6% | Added |
| KLP Kapitalforvaltning AS | 127,200 | $10.5M | 0.04% | +300+0.2% | Added |
| Alliancebernstein L.P. | 124,986 | $10.3M | 0.00% | −4,989−3.8% | Reduced |
| Capital Fund Management S.A. | 121,390 | $9.96M | 0.09% | +26,105+27.4% | Added |
| Teacher Retirement System of Texas | 120,925 | $9.92M | 0.03% | +18,630+18.2% | Added |
| Engineers Gate Manager LP | 120,721 | $9.90M | 0.12% | +23,627+24.3% | Added |
| Point72 Asset Management, L.P. | 118,712 | $9.74M | 0.02% | +118,712 | New |
| State Board of Administration of Florida Retirement System | 116,370 | $9.54M | 0.02% | −8,460−6.8% | Reduced |
| New York State Teachers Retirement System | 111,829 | $9.17M | 0.02% | −4,326−3.7% | Reduced |
| Truist Financial Corp | 111,295 | $9.13M | 0.01% | +2,670+2.5% | Added |
| TD Asset Management Inc | 110,200 | $9.04M | 0.01% | −1,038−0.9% | Reduced |
| Creative Planning | 110,041 | $9.03M | 0.01% | +68,647+165.8% | Added |
| Wells Fargo & Company | 107,472 | $8.81M | 0.00% | −12,095−10.1% | Reduced |
| Bank of Montreal | 106,077 | $8.70M | 0.00% | −1,587−1.5% | Reduced |
| Quantinno Capital Management LP | 104,590 | $8.58M | 0.02% | −47,330−31.2% | Reduced |
| Van Eck Associates Corp | 102,390 | $8.40M | 0.01% | +1,381+1.4% | Added |
| Hahn Capital Management LLC | 101,877 | $8.36M | 4.51% | −6,490−6.0% | Reduced |
| Schroder Investment Management Group | 100,359 | $8.35M | 0.01% | +662+0.7% | Added |
| California State Teachers Retirement System | 99,027 | $8.12M | 0.01% | −198−0.2% | Reduced |
| Stifel Financial Corp | 96,685 | $7.93M | 0.01% | +64,544+200.8% | Added |
| Kathmere Capital Management, LLC | 92,934 | $7.62M | 0.51% | −88−0.1% | Reduced |
| State of Wisconsin Investment Board | 88,440 | $7.25M | 0.02% | +2,759+3.2% | Added |
| Robeco Institutional Asset Management B.V. | 87,786 | $7.20M | 0.01% | −43,466−33.1% | Reduced |
| Martingale Asset Management L P | 85,767 | $7.03M | 0.18% | −131,137−60.5% | Reduced |