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 2021
Institutional positions in SEI Investments Co as of Jun 30, 2021. 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
- 440
- +1 vs. Q1 2021
- Shares held
- 97.6M
- −282.9K (−0.3%) vs. Q1 2021
- Total value
- $6.04B
- +$84.4M (+1.4%) vs. Q1 2021
- New holders
- 46
- 148 more added
- Sold out
- 45
- 150 more reduced
4 institutions that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2021: 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 2021
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Loomis Sayles & Co L P | 13,875,828 | $859.9M | 1.04% | −589,276−4.1% | Reduced |
| Vanguard Group Inc | 12,498,383 | $774.5M | 0.02% | +16,466+0.1% | Added |
| BlackRock Inc. | 12,070,275 | $748.0M | 0.02% | −671,112−5.3% | Reduced |
| Atlanta Capital Management Co L L C | 6,862,271 | $425.3M | 1.47% | +1,258,552+22.5% | Added |
| State Street Corp | 5,911,314 | $366.3M | 0.02% | +482,019+8.9% | Added |
| Bank of America Corp | 3,883,757 | $240.7M | 0.03% | +53,113+1.4% | Added |
| Beutel, Goodman & Co Ltd. | 2,687,582 | $166.5M | 0.99% | +631,191+30.7% | Added |
| Geode Capital Management, LLC | 1,943,076 | $120.4M | 0.02% | +41,235+2.2% | Added |
| Schroder Investment Management Group | 1,351,933 | $83.8M | 0.11% | +61,064+4.7% | Added |
| Royce & Associates LP | 1,307,855 | $81.0M | 0.56% | +47,517+3.8% | Added |
| Great West Life Assurance Co | 1,301,472 | $80.6M | 0.18% | −96,790−6.9% | Reduced |
| Bank of New York Mellon Corp | 1,276,641 | $79.1M | 0.02% | −124,849−8.9% | Reduced |
| Ameriprise Financial Inc | 1,227,494 | $76.1M | 0.02% | +30,933+2.6% | Added |
| Northern Trust Corp | 1,199,236 | $74.3M | 0.01% | −39,933−3.2% | Reduced |
| Dimensional Fund Advisors LP | 1,071,138 | $66.4M | 0.02% | +25,620+2.5% | Added |
| Norges Bank | 1,015,139 | $62.9M | 0.01% | −136,119−11.8% | Reduced |
| Legal & General Group Plc | 898,336 | $55.7M | 0.02% | −8,099−0.9% | Reduced |
| Boston Trust Walden Corp | 854,264 | $52.9M | 0.47% | +132,922+18.4% | Added |
| American Capital Management Inc | 774,251 | $48.0M | 1.34% | −1,245−0.2% | Reduced |
| Natixis Advisors, L.P. | 655,929 | $40.6M | 0.19% | −11,443−1.7% | Reduced |
| UBS Asset Management Americas Inc | 632,227 | $39.2M | 0.02% | −24,097−3.7% | Reduced |
| Charles Schwab Investment Management Inc | 611,407 | $37.9M | 0.01% | +12,913+2.2% | Added |
| Invesco Ltd. | 542,875 | $33.6M | 0.01% | −24,112−4.3% | Reduced |
| Goldman Sachs Group Inc | 491,671 | $30.5M | 0.01% | +64,382+15.1% | Added |
| Sunriver Management LLC | 460,542 | $28.5M | 4.86% | −221,771−32.5% | Reduced |
| Principal Financial Group Inc | 444,687 | $27.6M | 0.02% | +12,222+2.8% | Added |
| Markel Group Inc.SuperinvestorMarkel Group | 427,200 | $26.5M | 0.34% | 00.0% | Unchanged |
| Parametric Portfolio Associates LLC | 387,926 | $24.0M | 0.01% | +6,491+1.7% | Added |
| Arrowstreet Capital, Limited Partnership | 382,838 | $23.7M | 0.03% | +220,491+135.8% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 381,772 | $23.7M | 0.01% | −30,524−7.4% | Reduced |
| Nuveen Asset Management, LLC | 362,131 | $22.4M | 0.01% | −9,748−2.6% | Reduced |
| ProShare Advisors LLC | 348,140 | $21.6M | 0.06% | +59,427+20.6% | Added |
| PGGM Investments | 346,225 | $21.5M | 0.09% | −964−0.3% | Reduced |
| Millennium Management LLC | 344,929 | $21.4M | 0.03% | +77,816+29.1% | Added |
| Rhumbline Advisers | 340,255 | $21.1M | 0.03% | −5,961−1.7% | Reduced |
| First Trust Advisors LP | 338,983 | $21.0M | 0.02% | +70,968+26.5% | Added |
| Los Angeles Capital Management LLC | 335,352 | $20.8M | 0.09% | −304,683−47.6% | Reduced |
| Prana Capital Management, LP | 334,018 | $20.7M | 1.41% | +71,139+27.1% | Added |
| JPMorgan Chase & Co | 323,222 | $20.0M | 0.00% | +34,679+12.0% | Added |
| Goodnow Investment Group, LLC | 322,455 | $20.0M | 1.68% | −50,630−13.6% | Reduced |
| Reinhart Partners, Inc. | 321,651 | $19.9M | 0.99% | −222−0.1% | Reduced |
| Retirement Systems of Alabama | 318,820 | $19.8M | 0.07% | −1,057−0.3% | Reduced |
| Crestwood Advisors Group LLC | 299,494 | $18.6M | 0.54% | 00.0% | Unchanged |
| AQR Capital Management LLC | 297,732 | $18.4M | 0.03% | −11,282−3.7% | Reduced |
| AustralianSuper Pty Ltd | 294,360 | $18.2M | 0.13% | +74,597+33.9% | Added |
| JLB & Associates Inc | 288,799 | $17.9M | 2.79% | +1,475+0.5% | Added |
| Wells Fargo & Company | 288,352 | $17.9M | 0.00% | +114,634+66.0% | Added |
| UBS Group AG | 282,398 | $17.5M | 0.01% | +33,872+13.6% | Added |
| Eaton Vance Management | 280,987 | $17.4M | 0.02% | +981+0.4% | Added |
| Morgan Stanley | 279,332 | $17.3M | 0.00% | +13,842+5.2% | Added |
| Raymond James & Associates | 278,422 | $17.3M | 0.02% | +10,771+4.0% | Added |
| Schonfeld Strategic Advisors LLC | 268,610 | $16.6M | 0.19% | +64,310+31.5% | Added |
| New York State Common Retirement Fund | 255,902 | $15.9M | 0.02% | −82,198−24.3% | Reduced |
| California Public Employees Retirement System | 248,467 | $15.4M | 0.01% | −10,745−4.1% | Reduced |
| FMR LLC | 245,274 | $15.2M | 0.00% | +13,758+5.9% | Added |
| Victory Capital Management Inc | 240,664 | $14.9M | 0.01% | +18,234+8.2% | Added |
| Hendershot Investments Inc. | 237,535 | $14.7M | 3.20% | +5,838+2.5% | Added |
| Thrivent Financial for Lutherans | 232,571 | $14.4M | 0.03% | −904−0.4% | Reduced |
| Barclays PLC | 228,038 | $14.1M | 0.01% | +99,088+76.8% | Added |
| Torray LLC | 224,440 | $13.9M | 2.05% | 00.0% | Unchanged |
| Man Group plc | 222,519 | $13.8M | 0.05% | +23,448+11.8% | Added |
| Davis R M Inc | 221,762 | $13.7M | 0.35% | +23,090+11.6% | Added |
| Prudential Financial Inc | 217,387 | $13.5M | 0.02% | −169,259−43.8% | Reduced |
| Truist Financial Corp | 215,554 | $13.4M | 0.02% | −3,620−1.7% | Reduced |
| Envestnet Asset Management Inc | 211,390 | $13.1M | 0.01% | +6,489+3.2% | Added |
| American International Group, Inc. | 210,455 | $13.0M | 0.05% | −5,341−2.5% | Reduced |
| Hahn Capital Management LLC | 195,998 | $12.1M | 2.30% | +10,582+5.7% | Added |
| California State Teachers Retirement System | 186,963 | $11.6M | 0.01% | −37,075−16.5% | Reduced |
| Alliancebernstein L.P. | 186,686 | $11.6M | 0.00% | −4,210−2.2% | Reduced |
| Citigroup Inc | 186,322 | $11.5M | 0.01% | −476,551−71.9% | Reduced |
| Royal Bank of Canada | 178,162 | $11.0M | 0.00% | +10,416+6.2% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 175,229 | $10.9M | 0.06% | +3,538+2.1% | Added |
| Credit Suisse AG | 164,401 | $10.2M | 0.01% | −13,816−7.8% | Reduced |
| State Board of Administration of Florida Retirement System | 160,257 | $9.93M | 0.02% | +252+0.2% | Added |
| Brown Advisory Inc | 158,230 | $9.80M | 0.01% | +90,390+133.2% | Added |
| Deutsche Bank AG | 147,944 | $9.17M | 0.00% | −43,756−22.8% | Reduced |
| New York State Teachers Retirement System | 146,589 | $9.08M | 0.02% | +16,325+12.5% | Added |
| Robeco Institutional Asset Management B.V. | 146,218 | $9.06M | 0.02% | +28,003+23.7% | Added |
| Amundi | 135,984 | $8.43M | 0.01% | +135,984 | New |
| TD Asset Management Inc | 136,368 | $8.29M | 0.01% | +19,508+16.7% | Added |
| Manufacturers Life Insurance Company, The | 130,406 | $8.08M | 0.01% | −3,842−2.9% | Reduced |
| Andra AP-fonden | 128,800 | $7.98M | 0.16% | −2,400−1.8% | Reduced |
| Southernsun Asset Management, LLC | 122,799 | $7.61M | 0.83% | −735−0.6% | Reduced |
| Brandywine Global Investment Management, LLC | 122,001 | $7.56M | 0.06% | −4,819−3.8% | Reduced |
| Janney Montgomery Scott LLC | 116,985 | $7.25M | 0.03% | +11,192+10.6% | Added |
| RSM US Wealth Management LLC | 115,753 | $7.17M | 0.39% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 112,922 | $7.00M | 0.04% | −55,100−32.8% | Reduced |
| State of Wisconsin Investment Board | 111,930 | $6.94M | 0.01% | −2,635−2.3% | Reduced |
| State of Tennessee, Treasury Department | 107,818 | $6.68M | 0.03% | +10,000+10.2% | Added |
| Mirae Asset Global Investments Co., Ltd. | 107,343 | $6.65M | 0.02% | +616+0.6% | Added |
| Mutual of America Capital Management LLC | 104,926 | $6.50M | 0.06% | −2,602−2.4% | Reduced |
| Ensign Peak Advisors, Inc | 102,544 | $6.36M | 0.01% | −2,145−2.0% | Reduced |
| Court Place Advisors, LLC | 95,223 | $5.90M | 1.72% | −745−0.8% | Reduced |
| Caisse de Depot Et Placement du Quebec | 91,659 | $5.68M | 0.01% | +84,478+1,176.4% | Added |
| Amalgamated Bank | 91,567 | $5.67M | 0.05% | +77,447+548.5% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 91,191 | $5.65M | 0.01% | −9,760−9.7% | Reduced |
| Holocene Advisors, LP | 90,863 | $5.63M | 0.03% | −1,459−1.6% | Reduced |
| AMP Capital Investors Ltd | 88,468 | $5.48M | 0.03% | −18,140−17.0% | Reduced |
| Texas Permanent School Fund | 88,333 | $5.47M | 0.06% | −660−0.7% | Reduced |
| Bank of Montreal | 83,750 | $5.22M | 0.00% | +60,060+253.5% | Added |