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, Q2 2026
Institutional positions in SEI Investments Co as of Jun 30, 2026. 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
- 575
- +16 vs. Q1 2026
- Shares held
- 90.5M
- +664.6K (+0.7%) vs. Q1 2026
- Total value
- $7.94B
- +$888.3M (+12.6%) vs. Q1 2026
- New holders
- 77
- 173 more added
- Sold out
- 61
- 226 more reduced
10 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9,927,545 | $870.7M | 0.01% | −182,792−1.8% | Reduced |
| Loomis Sayles & Co L P | 8,482,052 | $744.0M | 0.93% | −146,827−1.7% | Reduced |
| Vanguard Portfolio Management LLC | 6,140,822 | $538.6M | 0.02% | +15,179+0.2% | Added |
| Vanguard Capital Management LLC | 4,686,241 | $411.0M | 0.01% | −55,475−1.2% | Reduced |
| State Street Corp | 4,251,584 | $372.9M | 0.01% | +66,406+1.6% | Added |
| Morgan Stanley | 4,119,203 | $361.3M | 0.02% | −673,076−14.0% | Reduced |
| Boston Partners | 3,093,791 | $271.4M | 0.24% | +1,323,752+74.8% | Added |
| Geode Capital Management, LLC | 2,953,161 | $259.1M | 0.01% | +122,829+4.3% | Added |
| Bank of America Corp | 2,908,071 | $255.1M | 0.02% | −12,435−0.4% | Reduced |
| FMR LLC | 2,510,218 | $220.2M | 0.01% | +417,719+20.0% | Added |
| Lord, Abbett & Co. LLC | 2,309,004 | $202.5M | 0.58% | +104,625+4.7% | Added |
| Dimensional Fund Advisors LP | 1,962,762 | $172.1M | 0.03% | +89,564+4.8% | Added |
| First Trust Advisors LP | 1,501,972 | $131.7M | 0.08% | −320,697−17.6% | Reduced |
| Beutel, Goodman & Co Ltd. | 1,494,684 | $131.1M | 0.96% | −278,470−15.7% | Reduced |
| Invesco Ltd. | 1,110,829 | $97.4M | 0.01% | −34,575−3.0% | Reduced |
| Royce & Associates LP | 1,050,287 | $92.1M | 0.74% | +53,831+5.4% | Added |
| Caisse de Depot Et Placement du Quebec | 1,002,445 | $87.9M | 0.13% | −195,644−16.3% | Reduced |
| Boston Trust Walden Corp | 991,300 | $86.9M | 0.66% | −48,431−4.7% | Reduced |
| Northern Trust Corp | 914,907 | $80.2M | 0.01% | +9,300+1.0% | Added |
| Bank of New York Mellon Corp | 894,194 | $78.4M | 0.01% | −42,108−4.5% | Reduced |
| Norges Bank | 887,116 | $77.8M | 0.01% | +887,116 | New |
| Barclays PLC | 825,215 | $72.4M | 0.02% | +444,238+116.6% | Added |
| American Capital Management Inc | 745,323 | $65.4M | 2.93% | −23,292−3.0% | Reduced |
| Charles Schwab Investment Management Inc | 695,446 | $61.0M | 0.01% | −1,027−0.1% | Reduced |
| Arrowstreet Capital, Limited Partnership | 660,498 | $57.9M | 0.03% | +92,531+16.3% | Added |
| Clark Capital Management Group, Inc. | 638,934 | $56.0M | 0.31% | −198,911−23.7% | Reduced |
| Vanguard Fiduciary Trust Co | 592,612 | $52.0M | 0.01% | +2,552+0.4% | Added |
| Raymond James Financial Inc | 583,800 | $51.2M | 0.01% | +11,637+2.0% | Added |
| Jane Street Group, LLC | 578,801 | $50.8M | 0.03% | +572,501+9,087.3% | Added |
| Ameriprise Financial Inc | 578,420 | $50.8M | 0.01% | −291,129−33.5% | Reduced |
| First Financial Bankshares Inc | 552,780 | $48.5M | 0.91% | −1,398−0.3% | Reduced |
| Quantinno Capital Management LP | 532,381 | $46.7M | 0.06% | +150,020+39.2% | Added |
| Voloridge Investment Management, LLC | 518,314 | $45.5M | 0.19% | +106,463+25.8% | Added |
| Franklin Resources Inc | 512,826 | $45.0M | 0.01% | −470,287−47.8% | Reduced |
| Envestnet Asset Management Inc | 478,365 | $42.0M | 0.01% | −20,157−4.0% | Reduced |
| Natixis Advisors, L.P. | 461,891 | $40.5M | 0.05% | −7,973−1.7% | Reduced |
| Goldman Sachs Group Inc | 461,227 | $40.5M | 0.00% | +137,098+42.3% | Added |
| Azora Capital LP | 443,189 | $38.9M | 1.64% | +443,189 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 421,046 | $36.9M | 0.07% | +78,531+22.9% | Added |
| JPMorgan Chase & Co | 375,392 | $32.9M | 0.00% | −86,268−18.7% | Reduced |
| AQR Capital Management LLC | 334,349 | $29.3M | 0.01% | −85,693−20.4% | Reduced |
| Thrivent Financial for Lutherans | 324,567 | $28.5M | 0.05% | −1,021−0.3% | Reduced |
| ProShare Advisors LLC | 319,375 | $28.0M | 0.04% | +18,743+6.2% | Added |
| Arbejdsmarkedets Tillaegspension | 313,600 | $27.5M | 0.60% | −9,818−3.0% | Reduced |
| Balyasny Asset Management LLC | 308,050 | $27.0M | 0.05% | +82,376+36.5% | Added |
| UBS Group AG | 307,430 | $27.0M | 0.00% | −9,175−2.9% | Reduced |
| Rhumbline Advisers | 303,552 | $26.6M | 0.02% | −5,935−1.9% | Reduced |
| Public Employees Retirement Association of Colorado | 300,935 | $26.4M | 0.09% | +81,300+37.0% | Added |
| Renaissance Technologies LLC | 284,726 | $25.0M | 0.03% | −115,100−28.8% | Reduced |
| Victory Capital Management Inc | 269,995 | $23.7M | 0.01% | −157,596−36.9% | Reduced |
| Millennium Management LLC | 266,217 | $23.3M | 0.02% | +147,452+124.2% | Added |
| JLB & Associates Inc | 261,576 | $22.9M | 3.07% | +2,393+0.9% | Added |
| Retirement Systems of Alabama | 253,332 | $22.2M | 0.07% | −19,345−7.1% | Reduced |
| Rockefeller Capital Management L.P. | 228,023 | $20.0M | 0.03% | +75,458+49.5% | Added |
| Toroso Investments, LLC | 226,700 | $19.9M | 0.05% | +65,207+40.4% | Added |
| Interval Partners, LP | 226,022 | $19.8M | 0.64% | +89,795+65.9% | Added |
| UBS Asset Management Americas Inc | 216,054 | $19.0M | 0.00% | −239,860−52.6% | Reduced |
| Principal Financial Group Inc | 207,644 | $18.2M | 0.01% | −440.0% | Reduced |
| California Public Employees Retirement System | 205,471 | $18.0M | 0.01% | +7,002+3.5% | Added |
| Swiss National Bank | 202,400 | $17.8M | 0.01% | −3,500−1.7% | Reduced |
| Alps Advisors Inc | 201,072 | $17.6M | 0.08% | −12,820−6.0% | Reduced |
| Crestwood Advisors Group LLC | 197,095 | $17.3M | 0.26% | +882+0.4% | Added |
| Amundi | 193,135 | $16.9M | 0.00% | +4,572+2.4% | Added |
| Nuveen, LLC | 185,536 | $16.3M | 0.00% | +10,325+5.9% | Added |
| Leith Wheeler Investment Counsel Ltd. | 174,506 | $15.3M | 1.16% | −21,743−11.1% | Reduced |
| Markel Group Inc.SuperinvestorMarkel Group | 173,200 | $15.2M | 0.12% | 00.0% | Unchanged |
| Royal Bank of Canada | 161,039 | $14.1M | 0.00% | −255,611−61.3% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 160,582 | $14.1M | 0.11% | +90,133+127.9% | Added |
| Foyston, Gordon, & Payne Inc | 157,958 | $13.9M | 2.98% | +171+0.1% | Added |
| LPL Financial LLC | 156,953 | $13.8M | 0.00% | −9,862−5.9% | Reduced |
| Bridgewater Associates, LP | 144,423 | $12.7M | 0.05% | −88,252−37.9% | Reduced |
| Advisor Group Holdings, Inc. | 141,682 | $12.4M | 0.01% | −10,000−6.6% | Reduced |
| Prana Capital Management, LP | 139,223 | $12.2M | 0.37% | −325,018−70.0% | Reduced |
| Legal & General Group Plc | 136,376 | $12.0M | 0.00% | −52,196−27.7% | Reduced |
| Wells Fargo & Company | 130,780 | $11.5M | 0.00% | +18,261+16.2% | Added |
| KLP Kapitalforvaltning AS | 127,800 | $11.2M | 0.04% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 119,448 | $11.1M | 0.02% | +106,374+813.6% | Added |
| Two Sigma Investments, LP | 118,660 | $10.4M | 0.01% | +99,460+518.0% | Added |
| California State Teachers Retirement System | 117,300 | $10.3M | 0.01% | −8,566−6.8% | Reduced |
| Bank of Montreal | 116,432 | $10.2M | 0.00% | +3,065+2.7% | Added |
| King Luther Capital Management Corp | 111,077 | $9.74M | 0.04% | +1,707+1.6% | Added |
| Alliancebernstein L.P. | 119,244 | $9.36M | 0.00% | −7,232−5.7% | Reduced |
| Truist Financial Corp | 106,452 | $9.34M | 0.01% | −4,214−3.8% | Reduced |
| Fideuram Asset Management (Ireland) dac | 113,187 | $9.14M | 0.18% | +113,187 | New |
| State Board of Administration of Florida Retirement System | 103,180 | $9.05M | 0.02% | −5,911−5.4% | Reduced |
| Van Eck Associates Corp | 102,923 | $9.03M | 0.01% | −3,297−3.1% | Reduced |
| CI Private Wealth, LLC | 102,534 | $8.99M | 0.01% | +10,246+11.1% | Added |
| Vanguard Asset Management, Ltd | 101,909 | $8.94M | 0.01% | +11,863+13.2% | Added |
| New York State Teachers Retirement System | 101,601 | $8.91M | 0.02% | −6,983−6.4% | Reduced |
| American Century Companies Inc | 101,518 | $8.90M | 0.00% | +6,288+6.6% | Added |
| Kathmere Capital Management, LLC | 100,611 | $8.82M | 0.47% | +1,126+1.1% | Added |
| Stifel Financial Corp | 99,780 | $8.75M | 0.01% | −1,438−1.4% | Reduced |
| Price T Rowe Associates Inc | 97,931 | $8.59M | 0.00% | +6,048+6.6% | Added |
| Creative Planning | 95,983 | $8.42M | 0.00% | −20,844−17.8% | Reduced |
| Citigroup Inc | 93,051 | $8.16M | 0.00% | +59,097+174.1% | Added |
| Citadel Advisors LLC | 92,433 | $8.11M | 0.00% | +50,464+120.2% | Added |
| Schonfeld Strategic Advisors LLC | 90,061 | $7.90M | 0.04% | +32,171+55.6% | Added |
| Karl Kapital LLC | 88,816 | $7.79M | 4.64% | +16,676+23.1% | Added |
| Man Group plc | 87,503 | $7.67M | 0.01% | −273,407−75.8% | Reduced |
| Horizon Investments, LLC | 86,966 | $7.63M | 0.08% | +83,862+2,701.7% | Added |