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 |
|---|---|---|---|---|---|
| JPMorgan Chase & Co | 323,222 | $20.0M | 0.00% | +34,679+12.0% | Added |
| Prana Capital Management, LP | 334,018 | $20.7M | 1.41% | +71,139+27.1% | Added |
| Los Angeles Capital Management LLC | 335,352 | $20.8M | 0.09% | −304,683−47.6% | Reduced |
| First Trust Advisors LP | 338,983 | $21.0M | 0.02% | +70,968+26.5% | Added |
| Rhumbline Advisers | 340,255 | $21.1M | 0.03% | −5,961−1.7% | Reduced |
| Millennium Management LLC | 344,929 | $21.4M | 0.03% | +77,816+29.1% | Added |
| PGGM Investments | 346,225 | $21.5M | 0.09% | −964−0.3% | Reduced |
| ProShare Advisors LLC | 348,140 | $21.6M | 0.06% | +59,427+20.6% | Added |
| Nuveen Asset Management, LLC | 362,131 | $22.4M | 0.01% | −9,748−2.6% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 381,772 | $23.7M | 0.01% | −30,524−7.4% | Reduced |
| Arrowstreet Capital, Limited Partnership | 382,838 | $23.7M | 0.03% | +220,491+135.8% | Added |
| Parametric Portfolio Associates LLC | 387,926 | $24.0M | 0.01% | +6,491+1.7% | Added |
| Markel Group Inc.SuperinvestorMarkel Group | 427,200 | $26.5M | 0.34% | 00.0% | Unchanged |
| Principal Financial Group Inc | 444,687 | $27.6M | 0.02% | +12,222+2.8% | Added |
| Sunriver Management LLC | 460,542 | $28.5M | 4.86% | −221,771−32.5% | Reduced |
| Goldman Sachs Group Inc | 491,671 | $30.5M | 0.01% | +64,382+15.1% | Added |
| Invesco Ltd. | 542,875 | $33.6M | 0.01% | −24,112−4.3% | Reduced |
| Charles Schwab Investment Management Inc | 611,407 | $37.9M | 0.01% | +12,913+2.2% | Added |
| UBS Asset Management Americas Inc | 632,227 | $39.2M | 0.02% | −24,097−3.7% | Reduced |
| Natixis Advisors, L.P. | 655,929 | $40.6M | 0.19% | −11,443−1.7% | Reduced |
| American Capital Management Inc | 774,251 | $48.0M | 1.34% | −1,245−0.2% | Reduced |
| Boston Trust Walden Corp | 854,264 | $52.9M | 0.47% | +132,922+18.4% | Added |
| Legal & General Group Plc | 898,336 | $55.7M | 0.02% | −8,099−0.9% | Reduced |
| Norges Bank | 1,015,139 | $62.9M | 0.01% | −136,119−11.8% | Reduced |
| Dimensional Fund Advisors LP | 1,071,138 | $66.4M | 0.02% | +25,620+2.5% | Added |
| Northern Trust Corp | 1,199,236 | $74.3M | 0.01% | −39,933−3.2% | Reduced |
| Ameriprise Financial Inc | 1,227,494 | $76.1M | 0.02% | +30,933+2.6% | Added |
| Bank of New York Mellon Corp | 1,276,641 | $79.1M | 0.02% | −124,849−8.9% | Reduced |
| Great West Life Assurance Co | 1,301,472 | $80.6M | 0.18% | −96,790−6.9% | Reduced |
| Royce & Associates LP | 1,307,855 | $81.0M | 0.56% | +47,517+3.8% | Added |
| Schroder Investment Management Group | 1,351,933 | $83.8M | 0.11% | +61,064+4.7% | Added |
| Geode Capital Management, LLC | 1,943,076 | $120.4M | 0.02% | +41,235+2.2% | Added |
| Beutel, Goodman & Co Ltd. | 2,687,582 | $166.5M | 0.99% | +631,191+30.7% | Added |
| Bank of America Corp | 3,883,757 | $240.7M | 0.03% | +53,113+1.4% | Added |
| State Street Corp | 5,911,314 | $366.3M | 0.02% | +482,019+8.9% | Added |
| Atlanta Capital Management Co L L C | 6,862,271 | $425.3M | 1.47% | +1,258,552+22.5% | Added |
| BlackRock Inc. | 12,070,275 | $748.0M | 0.02% | −671,112−5.3% | Reduced |
| Vanguard Group Inc | 12,498,383 | $774.5M | 0.02% | +16,466+0.1% | Added |
| Loomis Sayles & Co L P | 13,875,828 | $859.9M | 1.04% | −589,276−4.1% | Reduced |
| Longfellow Investment Management Co LLC | 5 | – | – | 00.0% | Unchanged |
| Confluence Investment Management LLC | 0 | $0 | 0.00% | −389,329−100.0% | Sold out |
| Duality Advisers, LP | 0 | $0 | 0.00% | −38,884−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −36,294−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −29,528−100.0% | Sold out |
| NN Investment Partners Holdings N.V. | 0 | $0 | 0.00% | −27,697−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −24,691−100.0% | Sold out |
| Bank of Nova Scotia | 0 | $0 | 0.00% | −21,200−100.0% | Sold out |
| Quantitative Systematic Strategies LLC | 0 | $0 | 0.00% | −18,907−100.0% | Sold out |
| Vident Investment Advisory, LLC | 0 | $0 | 0.00% | −16,903−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −16,867−100.0% | Sold out |
| Ossiam | 0 | $0 | 0.00% | −15,169−100.0% | Sold out |
| Cipher Capital LP | 0 | $0 | 0.00% | −15,049−100.0% | Sold out |
| Hussman Strategic Advisors, Inc. | 0 | $0 | 0.00% | −14,400−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −13,310−100.0% | Sold out |
| CIBC World Markets Corp | 0 | $0 | 0.00% | −12,790−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −11,000−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −10,600−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −8,283−100.0% | Sold out |
| WBI Investments | 0 | $0 | 0.00% | −8,012−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −7,978−100.0% | Sold out |
| WCM Investment Management, LLC | 0 | $0 | 0.00% | −7,654−100.0% | Sold out |
| ETF Managers Group, LLC | 0 | $0 | 0.00% | −7,133−100.0% | Sold out |
| Paloma Partners Management Co | 0 | $0 | 0.00% | −6,385−100.0% | Sold out |
| Summit Global Investments | 0 | $0 | 0.00% | −6,273−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −6,171−100.0% | Sold out |
| Wedbush Securities Inc | 0 | $0 | 0.00% | −6,079−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −6,070−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −5,774−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −5,698−100.0% | Sold out |
| LS Investment Advisors, LLC | 0 | $0 | 0.00% | −4,559−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −4,328−100.0% | Sold out |
| Gyon Technologies Capital Management, LP | 0 | $0 | 0.00% | −4,084−100.0% | Sold out |
| IBM Retirement Fund | 0 | $0 | 0.00% | −3,817−100.0% | Sold out |
| Oppenheimer & Co Inc | 0 | $0 | 0.00% | −3,304−100.0% | Sold out |
| Mirabella Financial Services LLP | 0 | $0 | 0.00% | −3,307−100.0% | Sold out |
| GVO Asset Management Ltd | 0 | $0 | 0.00% | −2,132−100.0% | Sold out |
| Ameritas Investment Company, LLC | 0 | $0 | 0.00% | −1,600−100.0% | Sold out |
| Wealthcare Advisory Partners LLC | 0 | $0 | 0.00% | −537−100.0% | Sold out |
| Eudaimonia Partners, LLC | 0 | $0 | 0.00% | −154−100.0% | Sold out |
| Exchange Traded Concepts, LLC | 0 | $0 | 0.00% | −139−100.0% | Sold out |
| Cutler Group LP | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Credential Qtrade Securities Inc. | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| WealthShield Partners, LLC | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Prime Capital Investment Advisors, LLC | 0 | $0 | 0.00% | −10−100.0% | Sold out |
| Atlas Private Wealth Advisors | 0 | $0 | 0.00% | −17−100.0% | Sold out |
| Amundi Asset Management US, Inc. | – | – | – | – | Not filed |
| BBVA USA Bancshares, Inc. | – | – | – | – | Not filed |
| CSat Investment Advisory, L.P. | – | – | – | – | Not filed |
| Bokf, NA | – | – | – | – | Not filed |