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, Q3 2021
Institutional positions in SEI Investments Co as of Sep 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
- 446
- +12 vs. Q2 2021
- Shares held
- 96.7M
- −835.6K (−0.9%) vs. Q2 2021
- Total value
- $5.73B
- −$308.3M (−5.1%) vs. Q2 2021
- New holders
- 42
- 138 more added
- Sold out
- 30
- 160 more reduced
6 institutions that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2021
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Loomis Sayles & Co L P | 13,882,438 | $823.2M | 1.01% | +6,6100.0% | Added |
| Vanguard Group Inc | 11,958,144 | $709.1M | 0.02% | −540,239−4.3% | Reduced |
| BlackRock Inc. | 11,379,097 | $674.8M | 0.02% | −691,178−5.7% | Reduced |
| Atlanta Capital Management Co L L C | 6,393,770 | $379.2M | 1.35% | −468,501−6.8% | Reduced |
| State Street Corp | 5,654,705 | $335.3M | 0.02% | −256,609−4.3% | Reduced |
| Bank of America Corp | 3,844,244 | $228.0M | 0.03% | −39,513−1.0% | Reduced |
| Beutel, Goodman & Co Ltd. | 2,811,087 | $166.7M | 1.02% | +123,505+4.6% | Added |
| Geode Capital Management, LLC | 1,802,037 | $106.8M | 0.01% | −141,039−7.3% | Reduced |
| Great West Life Assurance Co | 1,571,435 | $93.8M | 0.22% | +269,963+20.7% | Added |
| Royce & Associates LP | 1,401,369 | $83.1M | 0.62% | +93,514+7.2% | Added |
| Natixis Advisors, L.P. | 1,221,115 | $72.4M | 0.30% | +565,186+86.2% | Added |
| Northern Trust Corp | 1,201,931 | $71.3M | 0.01% | +2,695+0.2% | Added |
| Bank of New York Mellon Corp | 1,195,288 | $70.9M | 0.01% | −81,353−6.4% | Reduced |
| Schroder Investment Management Group | 1,150,411 | $68.2M | 0.11% | −201,522−14.9% | Reduced |
| Ameriprise Financial Inc | 1,094,081 | $64.8M | 0.02% | −133,413−10.9% | Reduced |
| Dimensional Fund Advisors LP | 1,078,764 | $64.0M | 0.02% | +7,626+0.7% | Added |
| Norges Bank | 970,941 | $57.6M | 0.01% | −44,198−4.4% | Reduced |
| Boston Trust Walden Corp | 889,081 | $52.7M | 0.47% | +34,817+4.1% | Added |
| Legal & General Group Plc | 888,467 | $52.7M | 0.02% | −9,869−1.1% | Reduced |
| Millennium Management LLC | 773,559 | $45.9M | 0.06% | +428,630+124.3% | Added |
| American Capital Management Inc | 756,769 | $44.9M | 1.21% | −17,482−2.3% | Reduced |
| UBS Asset Management Americas Inc | 661,021 | $39.2M | 0.02% | +28,794+4.6% | Added |
| Goldman Sachs Group Inc | 628,014 | $37.2M | 0.01% | +136,343+27.7% | Added |
| Charles Schwab Investment Management Inc | 576,178 | $34.2M | 0.01% | −35,229−5.8% | Reduced |
| Invesco Ltd. | 529,972 | $31.4M | 0.01% | −12,903−2.4% | Reduced |
| AQR Capital Management LLC | 524,845 | $31.1M | 0.06% | +227,113+76.3% | Added |
| Arrowstreet Capital, Limited Partnership | 481,325 | $28.5M | 0.04% | +98,487+25.7% | Added |
| Markel Group Inc.SuperinvestorMarkel Group | 431,200 | $25.6M | 0.32% | +4,000+0.9% | Added |
| Parametric Portfolio Associates LLC | 407,491 | $24.2M | 0.01% | +19,565+5.0% | Added |
| Principal Financial Group Inc | 388,124 | $23.0M | 0.02% | −56,563−12.7% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 354,368 | $21.0M | 0.01% | −27,404−7.2% | Reduced |
| PGGM Investments | 346,225 | $20.5M | 0.11% | 00.0% | Unchanged |
| Nuveen Asset Management, LLC | 335,587 | $19.9M | 0.01% | −26,544−7.3% | Reduced |
| ProShare Advisors LLC | 334,680 | $19.8M | 0.06% | −13,460−3.9% | Reduced |
| First Trust Advisors LP | 334,221 | $19.8M | 0.02% | −4,762−1.4% | Reduced |
| Goodnow Investment Group, LLC | 333,975 | $19.8M | 1.65% | +11,520+3.6% | Added |
| Rhumbline Advisers | 311,333 | $18.5M | 0.02% | −28,922−8.5% | Reduced |
| Retirement Systems of Alabama | 303,227 | $18.0M | 0.07% | −15,593−4.9% | Reduced |
| UBS Group AG | 299,731 | $17.8M | 0.01% | +17,333+6.1% | Added |
| Raymond James & Associates | 295,894 | $17.5M | 0.02% | +17,472+6.3% | Added |
| Reinhart Partners, Inc. | 295,320 | $17.5M | 0.89% | −26,331−8.2% | Reduced |
| Eaton Vance Management | 290,609 | $17.2M | 0.02% | +9,622+3.4% | Added |
| Wells Fargo & Company | 286,857 | $17.0M | 0.00% | −1,495−0.5% | Reduced |
| JLB & Associates Inc | 286,720 | $17.0M | 2.70% | −2,079−0.7% | Reduced |
| New York State Common Retirement Fund | 284,633 | $16.9M | 0.02% | +28,731+11.2% | Added |
| Man Group plc | 280,788 | $16.6M | 0.06% | +58,269+26.2% | Added |
| Los Angeles Capital Management LLC | 271,207 | $16.1M | 0.07% | −64,145−19.1% | Reduced |
| Brown Advisory Inc | 265,400 | $15.7M | 0.02% | +107,170+67.7% | Added |
| Sunriver Management LLC | 265,162 | $15.7M | 2.50% | −195,380−42.4% | Reduced |
| Morgan Stanley | 262,164 | $15.5M | 0.00% | −17,168−6.1% | Reduced |
| Crestwood Advisors Group LLC | 250,994 | $14.9M | 0.42% | −48,500−16.2% | Reduced |
| AustralianSuper Pty Ltd | 249,844 | $14.8M | 0.10% | −44,516−15.1% | Reduced |
| Thrivent Financial for Lutherans | 247,661 | $14.7M | 0.03% | +15,090+6.5% | Added |
| Hendershot Investments Inc. | 244,397 | $14.5M | 2.74% | +6,862+2.9% | Added |
| California Public Employees Retirement System | 242,031 | $14.4M | 0.01% | −6,436−2.6% | Reduced |
| Davis R M Inc | 235,225 | $13.9M | 0.35% | +13,463+6.1% | Added |
| Envestnet Asset Management Inc | 218,554 | $13.0M | 0.01% | +7,164+3.4% | Added |
| Truist Financial Corp | 213,849 | $12.7M | 0.02% | −1,705−0.8% | Reduced |
| Victory Capital Management Inc | 205,859 | $12.2M | 0.01% | −34,805−14.5% | Reduced |
| Barclays PLC | 205,779 | $12.2M | 0.01% | −22,259−9.8% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 203,600 | $12.1M | 0.06% | +28,371+16.2% | Added |
| HSBC Holdings PLC | 198,528 | $11.8M | 0.01% | +117,969+146.4% | Added |
| JPMorgan Chase & Co | 196,838 | $11.7M | 0.00% | −126,384−39.1% | Reduced |
| California State Teachers Retirement System | 193,143 | $11.5M | 0.01% | +6,180+3.3% | Added |
| Hahn Capital Management LLC | 190,681 | $11.3M | 2.21% | −5,317−2.7% | Reduced |
| American International Group, Inc. | 184,666 | $11.0M | 0.06% | −25,789−12.3% | Reduced |
| FMR LLC | 184,396 | $10.9M | 0.00% | −60,878−24.8% | Reduced |
| Prudential Financial Inc | 180,100 | $10.7M | 0.01% | −37,287−17.2% | Reduced |
| Renaissance Technologies LLC | 176,526 | $10.5M | 0.01% | +129,500+275.4% | Added |
| Alliancebernstein L.P. | 175,123 | $10.4M | 0.00% | −11,563−6.2% | Reduced |
| Schonfeld Strategic Advisors LLC | 175,000 | $10.4M | 0.12% | −93,610−34.8% | Reduced |
| Citigroup Inc | 165,106 | $9.79M | 0.01% | −21,216−11.4% | Reduced |
| Credit Suisse AG | 162,806 | $9.66M | 0.01% | −1,595−1.0% | Reduced |
| Royal Bank of Canada | 159,769 | $9.47M | 0.00% | −18,393−10.3% | Reduced |
| State Board of Administration of Florida Retirement System | 157,791 | $9.36M | 0.02% | −2,466−1.5% | Reduced |
| Prana Capital Management, LP | 157,717 | $9.35M | 0.82% | −176,301−52.8% | Reduced |
| Robeco Institutional Asset Management B.V. | 155,592 | $9.23M | 0.02% | +9,374+6.4% | Added |
| HRT Financial LP | 154,537 | $9.16M | 0.06% | +112,153+264.6% | Added |
| Deutsche Bank AG | 150,827 | $8.94M | 0.00% | +2,883+1.9% | Added |
| Caisse de Depot Et Placement du Quebec | 149,171 | $8.85M | 0.02% | +57,512+62.7% | Added |
| New York State Teachers Retirement System | 143,683 | $8.52M | 0.02% | −2,906−2.0% | Reduced |
| TD Asset Management Inc | 135,604 | $8.04M | 0.01% | −764−0.6% | Reduced |
| Andra AP-fonden | 128,800 | $7.64M | 0.16% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 124,320 | $7.37M | 0.01% | −6,086−4.7% | Reduced |
| Janney Montgomery Scott LLC | 123,514 | $7.33M | 0.03% | +6,529+5.6% | Added |
| Southernsun Asset Management, LLC | 122,852 | $7.29M | 0.77% | +530.0% | Added |
| D. E. Shaw & Co., Inc. | 117,436 | $6.96M | 0.01% | +102,845+704.9% | Added |
| Amundi | 117,180 | $6.95M | 0.00% | −18,804−13.8% | Reduced |
| AMP Capital Investors Ltd | 115,651 | $6.87M | 0.04% | +27,183+30.7% | Added |
| RSM US Wealth Management LLC | 115,753 | $6.86M | 0.37% | 00.0% | Unchanged |
| Brandywine Global Investment Management, LLC | 114,461 | $6.79M | 0.05% | −7,540−6.2% | Reduced |
| Teacher Retirement System of Texas | 111,871 | $6.63M | 0.04% | −1,051−0.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 107,643 | $6.38M | 0.02% | +300+0.3% | Added |
| Russell Investments Group, Ltd. | 107,452 | $6.38M | 0.01% | +28,404+35.9% | Added |
| Ensign Peak Advisors, Inc | 102,544 | $6.08M | 0.01% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 102,466 | $6.08M | 0.01% | −9,464−8.5% | Reduced |
| Bank of Montreal | 93,289 | $5.63M | 0.00% | +9,539+11.4% | Added |
| Mutual of America Capital Management LLC | 94,676 | $5.61M | 0.06% | −10,250−9.8% | Reduced |
| Court Place Advisors, LLC | 93,983 | $5.57M | 1.65% | −1,240−1.3% | Reduced |
| Cubist Systematic Strategies, LLC | 91,740 | $5.44M | 0.07% | +31,595+52.5% | Added |