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 11 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 |
|---|---|---|---|---|---|
| Public Employees Retirement Association of Colorado | 178,435 | $14.6M | 0.05% | 00.0% | Unchanged |
| Brandywine Global Investment Management, LLC | 179,610 | $14.7M | 0.10% | +13,293+8.0% | Added |
| HSBC Holdings PLC | 180,716 | $14.9M | 0.01% | +117,400+185.4% | Added |
| Interval Partners, LP | 184,896 | $15.2M | 0.35% | −19,018−9.3% | Reduced |
| Legal & General Group Plc | 190,243 | $15.6M | 0.00% | −39,742−17.3% | Reduced |
| California Public Employees Retirement System | 193,650 | $15.9M | 0.01% | −5,472−2.7% | Reduced |
| Leith Wheeler Investment Counsel Ltd. | 196,383 | $16.1M | 1.21% | −6,922−3.4% | Reduced |
| Principal Financial Group Inc | 200,362 | $16.4M | 0.01% | −8,626−4.1% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 204,267 | $16.8M | 0.04% | +153,472+302.1% | Added |
| Swiss National Bank | 207,100 | $17.0M | 0.01% | +2,000+1.0% | Added |
| Azora Capital LP | 216,465 | $17.8M | 1.12% | +216,465 | New |
| Alps Advisors Inc | 223,077 | $18.3M | 0.11% | −13,299−5.6% | Reduced |
| JLB & Associates Inc | 260,197 | $21.3M | 2.88% | −6,347−2.4% | Reduced |
| Arbejdsmarkedets Tillaegspension | 285,176 | $23.4M | 0.60% | +285,176 | New |
| Retirement Systems of Alabama | 287,932 | $23.6M | 0.08% | −1,919−0.7% | Reduced |
| Rhumbline Advisers | 309,335 | $25.4M | 0.02% | −16,905−5.2% | Reduced |
| Thrivent Financial for Lutherans | 311,567 | $25.6M | 0.05% | +59,336+23.5% | Added |
| Barclays PLC | 311,803 | $25.6M | 0.01% | +156,400+100.6% | Added |
| Goldman Sachs Group Inc | 319,208 | $26.2M | 0.00% | +78,858+32.8% | Added |
| Man Group plc | 333,568 | $27.4M | 0.05% | +19,374+6.2% | Added |
| Bridgewater Associates, LP | 345,877 | $28.4M | 0.10% | +83,375+31.8% | Added |
| Millennium Management LLC | 371,635 | $30.5M | 0.02% | −284,054−43.3% | Reduced |
| Voloridge Investment Management, LLC | 378,214 | $31.0M | 0.11% | −28,023−6.9% | Reduced |
| Victory Capital Management Inc | 382,841 | $31.4M | 0.02% | +247,679+183.2% | Added |
| Renaissance Technologies LLC | 397,226 | $32.6M | 0.05% | +10,300+2.7% | Added |
| ProShare Advisors LLC | 405,354 | $33.2M | 0.06% | +15,733+4.0% | Added |
| Envestnet Asset Management Inc | 427,787 | $35.1M | 0.01% | +66,351+18.4% | Added |
| JPMorgan Chase & Co | 433,470 | $35.6M | 0.00% | +52,336+13.7% | Added |
| AQR Capital Management LLC | 451,873 | $37.1M | 0.02% | −15,471−3.3% | Reduced |
| UBS Asset Management Americas Inc | 454,136 | $37.2M | 0.01% | −429,617−48.6% | Reduced |
| Arrowstreet Capital, Limited Partnership | 463,646 | $38.0M | 0.02% | +133,676+40.5% | Added |
| Natixis Advisors, L.P. | 470,476 | $38.6M | 0.05% | −40,590−7.9% | Reduced |
| PFA Pension, Forsikringsaktieselskab | 519,312 | $43.2M | 0.12% | +519,312 | New |
| Raymond James Financial Inc | 532,358 | $43.7M | 0.01% | +4,044+0.8% | Added |
| Qube Research & Technologies Ltd | 563,212 | $46.2M | 0.07% | −203,563−26.5% | Reduced |
| American Capital Management Inc | 574,819 | $47.1M | 2.08% | +9,702+1.7% | Added |
| Royal Bank of Canada | 611,174 | $50.1M | 0.01% | −339,908−35.7% | Reduced |
| UBS Group AG | 636,192 | $52.2M | 0.01% | +192,470+43.4% | Added |
| Clark Capital Management Group, Inc. | 645,859 | $53.0M | 0.33% | +619,315+2,333.2% | Added |
| Prana Capital Management, LP | 651,166 | $53.4M | 1.94% | −60,145−8.5% | Reduced |
| Norges Bank | 652,868 | $53.5M | 0.01% | +652,868 | New |
| Charles Schwab Investment Management Inc | 664,349 | $54.5M | 0.01% | +1,891+0.3% | Added |
| Franklin Resources Inc | 818,694 | $67.1M | 0.02% | +180,208+28.2% | Added |
| Ameriprise Financial Inc | 821,461 | $67.4M | 0.02% | +5,767+0.7% | Added |
| Northern Trust Corp | 891,476 | $73.1M | 0.01% | −31,144−3.4% | Reduced |
| Royce & Associates LP | 906,339 | $74.3M | 0.75% | +2,756+0.3% | Added |
| Bank of New York Mellon Corp | 990,651 | $81.3M | 0.01% | −23,260−2.3% | Reduced |
| Boston Trust Walden Corp | 1,084,790 | $89.0M | 0.67% | −20,619−1.9% | Reduced |
| FMR LLC | 1,343,174 | $110.2M | 0.01% | −6,456−0.5% | Reduced |
| Caisse de Depot Et Placement du Quebec | 1,380,997 | $113.3M | 0.19% | +37,240+2.8% | Added |
| Invesco Ltd. | 1,732,384 | $142.1M | 0.01% | +8610.0% | Added |
| First Trust Advisors LP | 1,800,938 | $147.7M | 0.11% | +75,919+4.4% | Added |
| Dimensional Fund Advisors LP | 1,853,144 | $152.0M | 0.03% | −9,908−0.5% | Reduced |
| Beutel, Goodman & Co Ltd. | 1,882,427 | $154.4M | 0.95% | −140,523−6.9% | Reduced |
| Lord, Abbett & Co. LLC | 1,917,370 | $157.3M | 0.48% | +308,988+19.2% | Added |
| Geode Capital Management, LLC | 2,894,317 | $237.4M | 0.01% | +109,974+3.9% | Added |
| Bank of America Corp | 2,922,323 | $239.7M | 0.02% | −198,744−6.4% | Reduced |
| State Street Corp | 4,283,065 | $353.5M | 0.01% | −253,517−5.6% | Reduced |
| Morgan Stanley | 5,075,178 | $416.3M | 0.02% | −518,564−9.3% | Reduced |
| Loomis Sayles & Co L P | 8,744,634 | $717.2M | 0.86% | −231,415−2.6% | Reduced |
| BlackRock, Inc. | 9,637,840 | $790.5M | 0.01% | +375,238+4.1% | Added |
| Vanguard Group Inc | 11,071,365 | $908.1M | 0.01% | −189,226−1.7% | Reduced |
| Jupiter Asset Management Ltd | 0 | $0 | 0.00% | −277,462−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −88,345−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −71,629−100.0% | Sold out |
| Summit Wealth Group LLC | 0 | $0 | 0.00% | −115,735−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −64,248−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −49,043−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −37,115−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −36,702−100.0% | Sold out |
| NJ State Employees Deferred Compensation Plan | 0 | $0 | 0.00% | −35,400−100.0% | Sold out |
| BI Asset Management Fondsmaeglerselskab A/S | 0 | $0 | 0.00% | −27,042−100.0% | Sold out |
| Hussman Strategic Advisors, Inc. | 0 | $0 | 0.00% | −21,000−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −15,606−100.0% | Sold out |
| Pensionfund Sabic | 0 | $0 | 0.00% | −14,100−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −12,623−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −10,957−100.0% | Sold out |
| Atom Investors LP | 0 | $0 | 0.00% | −8,155−100.0% | Sold out |
| Inscription Capital, LLC | 0 | $0 | 0.00% | −6,704−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −6,149−100.0% | Sold out |
| Susquehanna Fundamental Investments, LLC | 0 | $0 | 0.00% | −5,421−100.0% | Sold out |
| Advyzon Investment Management, LLC | 0 | $0 | 0.00% | −5,396−100.0% | Sold out |
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −5,110−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −4,997−100.0% | Sold out |
| Ground Swell Capital, LLC | 0 | $0 | 0.00% | −4,250−100.0% | Sold out |
| Aaron Wealth Advisors | 0 | $0 | 0.00% | −3,999−100.0% | Sold out |
| J.W. Cole Advisors, Inc. | 0 | $0 | 0.00% | −3,465−100.0% | Sold out |
| Longboard Asset Management, LP | 0 | $0 | 0.00% | −3,270−100.0% | Sold out |
| Sageworth Trust Co | 0 | $0 | 0.00% | −3,070−100.0% | Sold out |
| Polymer Capital Management (HK) LTD | 0 | $0 | 0.00% | −2,935−100.0% | Sold out |
| Modern Wealth Management, LLC | 0 | $0 | 0.00% | −2,773−100.0% | Sold out |
| Inceptionr LLC | 0 | $0 | 0.00% | −2,717−100.0% | Sold out |
| Norden Group LLC | 0 | $0 | 0.00% | −2,716−100.0% | Sold out |
| RSM US Wealth Management LLC | 0 | $0 | 0.00% | −2,697−100.0% | Sold out |
| Cooper Financial Group | 0 | $0 | 0.00% | −2,476−100.0% | Sold out |
| Cambridge Investment Research Advisors, Inc. | 0 | $0 | 0.00% | −2,375−100.0% | Sold out |
| Florida Financial Advisors, LLC | 0 | $0 | 0.00% | −2,367−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −1,281−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −1,193−100.0% | Sold out |
| Painted Porch Advisors LLC | 0 | $0 | 0.00% | −827−100.0% | Sold out |