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 |
|---|---|---|---|---|---|
| New York State Common Retirement Fund | 284,633 | $16.9M | 0.02% | +28,731+11.2% | Added |
| JLB & Associates Inc | 286,720 | $17.0M | 2.70% | −2,079−0.7% | Reduced |
| Wells Fargo & Company | 286,857 | $17.0M | 0.00% | −1,495−0.5% | Reduced |
| Eaton Vance Management | 290,609 | $17.2M | 0.02% | +9,622+3.4% | Added |
| Reinhart Partners, Inc. | 295,320 | $17.5M | 0.89% | −26,331−8.2% | Reduced |
| Raymond James & Associates | 295,894 | $17.5M | 0.02% | +17,472+6.3% | Added |
| UBS Group AG | 299,731 | $17.8M | 0.01% | +17,333+6.1% | Added |
| Retirement Systems of Alabama | 303,227 | $18.0M | 0.07% | −15,593−4.9% | Reduced |
| Rhumbline Advisers | 311,333 | $18.5M | 0.02% | −28,922−8.5% | Reduced |
| Goodnow Investment Group, LLC | 333,975 | $19.8M | 1.65% | +11,520+3.6% | Added |
| First Trust Advisors LP | 334,221 | $19.8M | 0.02% | −4,762−1.4% | Reduced |
| ProShare Advisors LLC | 334,680 | $19.8M | 0.06% | −13,460−3.9% | Reduced |
| Nuveen Asset Management, LLC | 335,587 | $19.9M | 0.01% | −26,544−7.3% | Reduced |
| PGGM Investments | 346,225 | $20.5M | 0.11% | 00.0% | Unchanged |
| Sumitomo Mitsui Trust Holdings, Inc. | 354,368 | $21.0M | 0.01% | −27,404−7.2% | Reduced |
| Principal Financial Group Inc | 388,124 | $23.0M | 0.02% | −56,563−12.7% | Reduced |
| Parametric Portfolio Associates LLC | 407,491 | $24.2M | 0.01% | +19,565+5.0% | Added |
| Markel Group Inc.SuperinvestorMarkel Group | 431,200 | $25.6M | 0.32% | +4,000+0.9% | Added |
| Arrowstreet Capital, Limited Partnership | 481,325 | $28.5M | 0.04% | +98,487+25.7% | Added |
| AQR Capital Management LLC | 524,845 | $31.1M | 0.06% | +227,113+76.3% | Added |
| Invesco Ltd. | 529,972 | $31.4M | 0.01% | −12,903−2.4% | Reduced |
| Charles Schwab Investment Management Inc | 576,178 | $34.2M | 0.01% | −35,229−5.8% | Reduced |
| Goldman Sachs Group Inc | 628,014 | $37.2M | 0.01% | +136,343+27.7% | Added |
| UBS Asset Management Americas Inc | 661,021 | $39.2M | 0.02% | +28,794+4.6% | Added |
| American Capital Management Inc | 756,769 | $44.9M | 1.21% | −17,482−2.3% | Reduced |
| Millennium Management LLC | 773,559 | $45.9M | 0.06% | +428,630+124.3% | Added |
| Legal & General Group Plc | 888,467 | $52.7M | 0.02% | −9,869−1.1% | Reduced |
| Boston Trust Walden Corp | 889,081 | $52.7M | 0.47% | +34,817+4.1% | Added |
| Norges Bank | 970,941 | $57.6M | 0.01% | −44,198−4.4% | Reduced |
| Dimensional Fund Advisors LP | 1,078,764 | $64.0M | 0.02% | +7,626+0.7% | Added |
| Ameriprise Financial Inc | 1,094,081 | $64.8M | 0.02% | −133,413−10.9% | Reduced |
| Schroder Investment Management Group | 1,150,411 | $68.2M | 0.11% | −201,522−14.9% | Reduced |
| Bank of New York Mellon Corp | 1,195,288 | $70.9M | 0.01% | −81,353−6.4% | Reduced |
| Northern Trust Corp | 1,201,931 | $71.3M | 0.01% | +2,695+0.2% | Added |
| Natixis Advisors, L.P. | 1,221,115 | $72.4M | 0.30% | +565,186+86.2% | Added |
| Royce & Associates LP | 1,401,369 | $83.1M | 0.62% | +93,514+7.2% | Added |
| Great West Life Assurance Co | 1,571,435 | $93.8M | 0.22% | +269,963+20.7% | Added |
| Geode Capital Management, LLC | 1,802,037 | $106.8M | 0.01% | −141,039−7.3% | Reduced |
| Beutel, Goodman & Co Ltd. | 2,811,087 | $166.7M | 1.02% | +123,505+4.6% | Added |
| Bank of America Corp | 3,844,244 | $228.0M | 0.03% | −39,513−1.0% | Reduced |
| State Street Corp | 5,654,705 | $335.3M | 0.02% | −256,609−4.3% | Reduced |
| Atlanta Capital Management Co L L C | 6,393,770 | $379.2M | 1.35% | −468,501−6.8% | Reduced |
| BlackRock Inc. | 11,379,097 | $674.8M | 0.02% | −691,178−5.7% | Reduced |
| Vanguard Group Inc | 11,958,144 | $709.1M | 0.02% | −540,239−4.3% | Reduced |
| Loomis Sayles & Co L P | 13,882,438 | $823.2M | 1.01% | +6,6100.0% | Added |
| Longfellow Investment Management Co LLC | 5 | – | – | 00.0% | Unchanged |
| Pensionfund DSM Netherlands | 0 | $0 | 0.00% | −46,800−100.0% | Sold out |
| Torray LLC | 0 | $0 | 0.00% | −224,440−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −53,395−100.0% | Sold out |
| Forsta Ap-Fonden | 0 | $0 | 0.00% | −29,700−100.0% | Sold out |
| Clearbridge Investments, LLC | 0 | $0 | 0.00% | −14,279−100.0% | Sold out |
| Alphasimplex Group, LLC | 0 | $0 | 0.00% | −14,238−100.0% | Sold out |
| Marshall Wace North America L.P. | 0 | $0 | 0.00% | −13,734−100.0% | Sold out |
| Livingston Group Asset Management CO (operating as Southport Capital Management) | 0 | $0 | 0.00% | −11,800−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −10,761−100.0% | Sold out |
| Banco Bilbao Vizcaya Argentaria, S.A. | 0 | $0 | 0.00% | −7,610−100.0% | Sold out |
| Quantitative Investment Management, LLC | 0 | $0 | 0.00% | −7,042−100.0% | Sold out |
| GW Henssler & Associates Ltd | 0 | $0 | 0.00% | −6,508−100.0% | Sold out |
| Point72 Hong Kong Ltd | 0 | $0 | 0.00% | −5,871−100.0% | Sold out |
| L2 Asset Management, LLC | 0 | $0 | 0.00% | −5,022−100.0% | Sold out |
| BP PLC | 0 | $0 | 0.00% | −4,688−100.0% | Sold out |
| Teza Capital Management LLC | 0 | $0 | 0.00% | −4,499−100.0% | Sold out |
| JustInvest LLC | 0 | $0 | 0.00% | −4,219−100.0% | Sold out |
| Pearl River Capital, LLC | 0 | $0 | 0.00% | −4,134−100.0% | Sold out |
| Sciencast Management LP | 0 | $0 | 0.00% | −3,983−100.0% | Sold out |
| Blueshift Asset Management, LLC | 0 | $0 | 0.00% | −3,914−100.0% | Sold out |
| Cigna Investments Inc | 0 | $0 | 0.00% | −3,547−100.0% | Sold out |
| Venturi Wealth Management, LLC | 0 | $0 | 0.00% | −3,475−100.0% | Sold out |
| Legacy Advisors, LLC | 0 | $0 | 0.00% | −3,354−100.0% | Sold out |
| Mairs & Power Inc | 0 | $0 | 0.00% | −3,300−100.0% | Sold out |
| FORA Capital, LLC | 0 | $0 | 0.00% | −3,096−100.0% | Sold out |
| Shell Asset Management Co | 0 | $0 | 0.00% | −278−100.0% | Sold out |
| Parisi Gray Wealth Management | 0 | $0 | 0.00% | −162−100.0% | Sold out |
| GPS Wealth Strategies Group, LLC | 0 | $0 | 0.00% | −81−100.0% | Sold out |
| CVA Family Office, LLC | 0 | $0 | 0.00% | −30−100.0% | Sold out |
| Enterprise Financial Services Corp | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Pictet Asset Management Ltd | – | – | – | – | Not filed |
| Hoover Financial Advisors, Inc. | – | – | – | – | Not filed |
| PNC Managed Account Solutions, Inc. | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |
| Castleview Partners, LLC | – | – | – | – | Not filed |
| First Horizon Corp | – | – | – | – | Not filed |