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 2025
Institutional positions in SEI Investments Co as of Jun 30, 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
- 564
- +26 vs. Q1 2025
- Shares held
- 90.1M
- −3.55M (−3.8%) vs. Q1 2025
- Total value
- $8.09B
- +$829.7M (+11.4%) vs. Q1 2025
- New holders
- 105
- 184 more added
- Sold out
- 79
- 197 more reduced
8 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 11,229,621 | $1.01B | 0.02% | −231,566−2.0% | Reduced |
| BlackRock, Inc. | 9,202,020 | $826.9M | 0.02% | −2,168,392−19.1% | Reduced |
| Loomis Sayles & Co L P | 8,841,249 | $794.5M | 1.00% | +121,198+1.4% | Added |
| Morgan Stanley | 5,634,328 | $506.3M | 0.03% | −161,590−2.8% | Reduced |
| State Street Corp | 4,745,485 | $426.4M | 0.02% | −992,326−17.3% | Reduced |
| Bank of America Corp | 3,160,636 | $284.0M | 0.02% | +133,057+4.4% | Added |
| Beutel, Goodman & Co Ltd. | 2,600,616 | $233.7M | 1.33% | −74,994−2.8% | Reduced |
| Geode Capital Management, LLC | 2,576,037 | $231.5M | 0.02% | −111,546−4.2% | Reduced |
| Dimensional Fund Advisors LP | 1,831,099 | $164.5M | 0.04% | +98,588+5.7% | Added |
| First Trust Advisors LP | 1,727,334 | $155.2M | 0.12% | +144,789+9.1% | Added |
| Invesco Ltd. | 1,662,650 | $149.4M | 0.03% | −40,312−2.4% | Reduced |
| Lord, Abbett & Co. LLC | 1,482,849 | $133.2M | 0.43% | +815,931+122.3% | Added |
| Boston Trust Walden Corp | 1,369,674 | $123.1M | 0.88% | +44,195+3.3% | Added |
| Royce & Associates LP | 1,226,752 | $110.2M | 1.13% | −53,440−4.2% | Reduced |
| Royal Bank of Canada | 1,123,136 | $100.9M | 0.02% | +497,217+79.4% | Added |
| Caisse de Depot Et Placement du Quebec | 1,026,054 | $92.2M | 0.20% | +288,807+39.2% | Added |
| Bank of New York Mellon Corp | 1,020,339 | $91.7M | 0.02% | −112,604−9.9% | Reduced |
| Northern Trust Corp | 914,465 | $82.2M | 0.01% | −139,383−13.2% | Reduced |
| UBS Asset Management Americas Inc | 861,490 | $77.4M | 0.02% | +60,434+7.5% | Added |
| FMR LLC | 838,078 | $75.3M | 0.00% | −76,163−8.3% | Reduced |
| Azora Capital LP | 777,952 | $69.9M | 3.16% | +406,287+109.3% | Added |
| Charles Schwab Investment Management Inc | 666,581 | $59.9M | 0.01% | −5,091−0.8% | Reduced |
| Norges Bank | 619,682 | $55.7M | 0.01% | +83,304+15.5% | Added |
| Ameriprise Financial Inc | 594,661 | $53.4M | 0.01% | +96,573+19.4% | Added |
| Millennium Management LLC | 581,434 | $52.2M | 0.05% | −202,185−25.8% | Reduced |
| Franklin Resources Inc | 545,359 | $49.0M | 0.01% | +853+0.2% | Added |
| Raymond James Financial Inc | 542,591 | $48.8M | 0.02% | +10,396+2.0% | Added |
| Natixis Advisors, L.P. | 529,634 | $47.6M | 0.08% | −8,830−1.6% | Reduced |
| American Capital Management Inc | 463,776 | $41.7M | 1.73% | −57,130−11.0% | Reduced |
| ProShare Advisors LLC | 452,154 | $40.6M | 0.08% | +90,474+25.0% | Added |
| Prana Capital Management, LP | 442,288 | $39.7M | 1.44% | +58,327+15.2% | Added |
| Goldman Sachs Group Inc | 423,894 | $38.1M | 0.01% | +204,195+92.9% | Added |
| Renaissance Technologies LLC | 421,926 | $37.9M | 0.05% | +224,100+113.3% | Added |
| Qube Research & Technologies Ltd | 420,079 | $37.7M | 0.05% | +181,586+76.1% | Added |
| Jupiter Asset Management Ltd | 417,205 | $37.5M | 0.31% | +417,205 | New |
| AQR Capital Management LLC | 392,505 | $35.3M | 0.03% | −13,744−3.4% | Reduced |
| UBS Group AG | 381,094 | $34.2M | 0.01% | −17,842−4.5% | Reduced |
| Jane Street Group, LLC | 378,372 | $34.0M | 0.05% | +136,033+56.1% | Added |
| JPMorgan Chase & Co | 372,028 | $33.4M | 0.00% | −116,251−23.8% | Reduced |
| Arrowstreet Capital, Limited Partnership | 366,742 | $33.0M | 0.02% | +92,763+33.9% | Added |
| Envestnet Asset Management Inc | 356,037 | $32.0M | 0.01% | −39,248−9.9% | Reduced |
| Rhumbline Advisers | 316,381 | $28.4M | 0.02% | −20,173−6.0% | Reduced |
| Voloridge Investment Management, LLC | 285,697 | $25.7M | 0.09% | −291,998−50.5% | Reduced |
| Alps Advisors Inc | 276,449 | $24.8M | 0.14% | −1,879−0.7% | Reduced |
| Retirement Systems of Alabama | 274,629 | $24.7M | 0.09% | −1,695−0.6% | Reduced |
| JLB & Associates Inc | 268,261 | $24.1M | 3.36% | −8,343−3.0% | Reduced |
| Two Sigma Investments, LP | 249,399 | $22.4M | 0.04% | +173,705+229.5% | Added |
| Legal & General Group Plc | 241,531 | $21.7M | 0.01% | −160,739−40.0% | Reduced |
| Nuveen, LLC | 236,776 | $21.3M | 0.01% | −38,987−14.1% | Reduced |
| Interval Partners, LP | 229,753 | $20.6M | 0.47% | −22,438−8.9% | Reduced |
| Martingale Asset Management L P | 228,004 | $20.5M | 0.50% | −3,639−1.6% | Reduced |
| Man Group plc | 222,953 | $20.0M | 0.04% | −130,623−36.9% | Reduced |
| Principal Financial Group Inc | 214,908 | $19.3M | 0.01% | −16,131−7.0% | Reduced |
| Swiss National Bank | 204,100 | $18.3M | 0.01% | +204,100 | New |
| Citadel Advisors LLC | 202,576 | $18.2M | 0.02% | +202,576 | New |
| Crestwood Advisors Group LLC | 201,193 | $18.1M | 0.32% | −6,780−3.3% | Reduced |
| Leith Wheeler Investment Counsel Ltd. | 200,409 | $18.0M | 1.28% | −5,400−2.6% | Reduced |
| State of Alaska, Department of Revenue | 198,665 | $17.9M | 0.19% | −665−0.3% | Reduced |
| Treasurer of the State of North Carolina | 186,329 | $16.7M | 0.05% | +98,782+112.8% | Added |
| California Public Employees Retirement System | 178,461 | $16.0M | 0.01% | +19,194+12.1% | Added |
| Vestcor Inc | 174,472 | $15.7M | 0.47% | −2,316−1.3% | Reduced |
| Markel Group Inc.SuperinvestorMarkel Group | 173,200 | $15.6M | 0.13% | 00.0% | Unchanged |
| Trexquant Investment LP | 163,649 | $14.7M | 0.17% | +163,649 | New |
| Amundi | 157,857 | $14.5M | 0.01% | −624,178−79.8% | Reduced |
| KLP Kapitalforvaltning AS | 155,500 | $14.0M | 0.06% | −6,800−4.2% | Reduced |
| Brandywine Global Investment Management, LLC | 154,577 | $13.9M | 0.10% | +77,854+101.5% | Added |
| Barclays PLC | 154,078 | $13.8M | 0.01% | +38,491+33.3% | Added |
| Victory Capital Management Inc | 153,536 | $13.8M | 0.01% | −21,115−12.1% | Reduced |
| Foyston, Gordon, & Payne Inc | 151,481 | $13.6M | 3.10% | +9,739+6.9% | Added |
| D. E. Shaw & Co., Inc. | 145,566 | $13.1M | 0.01% | +145,566 | New |
| Russell Investments Group, Ltd. | 145,003 | $13.0M | 0.02% | −34,619−19.3% | Reduced |
| Allianz Asset Management GmbH | 143,855 | $12.9M | 0.02% | −49,898−25.8% | Reduced |
| Schonfeld Strategic Advisors LLC | 143,685 | $12.9M | 0.10% | +53,567+59.4% | Added |
| Advisor Group Holdings, Inc. | 139,654 | $12.5M | 0.02% | +9,442+7.3% | Added |
| King Luther Capital Management Corp | 138,265 | $12.4M | 0.05% | +32,894+31.2% | Added |
| State Board of Administration of Florida Retirement System | 137,129 | $12.3M | 0.02% | −5,308−3.7% | Reduced |
| Janney Montgomery Scott LLC | 135,511 | $12.2M | 0.03% | +132,857+5,005.9% | Added |
| Van Eck Associates Corp | 135,196 | $12.1M | 0.01% | +74,271+121.9% | Added |
| Squarepoint Ops LLC | 133,094 | $12.0M | 0.03% | +133,094 | New |
| Bridgewater Associates, LP | 129,587 | $11.6M | 0.05% | −16,993−11.6% | Reduced |
| Alliancebernstein L.P. | 126,533 | $11.4M | 0.00% | −855−0.7% | Reduced |
| TD Asset Management Inc | 125,676 | $11.3M | 0.01% | −19,288−13.3% | Reduced |
| Bank of Montreal | 123,098 | $11.1M | 0.01% | −11,521−8.6% | Reduced |
| New York State Teachers Retirement System | 117,501 | $10.6M | 0.02% | −468−0.4% | Reduced |
| Bank of Nova Scotia | 117,000 | $10.5M | 0.02% | +113,122+2,917.0% | Added |
| American Century Companies Inc | 116,161 | $10.4M | 0.01% | +16,843+17.0% | Added |
| Cubist Systematic Strategies, LLC | 116,093 | $10.4M | 0.11% | +116,093 | New |
| Truist Financial Corp | 115,153 | $10.3M | 0.02% | −489−0.4% | Reduced |
| Hahn Capital Management LLC | 113,207 | $10.2M | 4.80% | −1,756−1.5% | Reduced |
| Abn Amro Investment Solutions | 107,850 | $9.69M | 0.19% | −2,750−2.5% | Reduced |
| California State Teachers Retirement System | 104,769 | $9.41M | 0.01% | −27,192−20.6% | Reduced |
| Acadian Asset Management LLC | 104,687 | $9.40M | 0.02% | −146,394−58.3% | Reduced |
| Thrivent Financial for Lutherans | 104,293 | $9.37M | 0.02% | −27,115−20.6% | Reduced |
| HRT Financial LP | 103,030 | $9.26M | 0.04% | +103,030 | New |
| Quantinno Capital Management LP | 103,006 | $9.26M | 0.04% | +57,063+124.2% | Added |
| Susquehanna Portfolio Strategies, LLC | 100,596 | $9.04M | 0.20% | +100,596 | New |
| Rockefeller Capital Management L.P. | 100,037 | $8.99M | 0.02% | +100,037 | New |
| LPL Financial LLC | 99,055 | $8.90M | 0.00% | +5,600+6.0% | Added |
| Wells Fargo & Company | 95,667 | $8.60M | 0.00% | +32,503+51.5% | Added |
| Teacher Retirement System of Texas | 94,711 | $8.51M | 0.04% | −222,888−70.2% | Reduced |