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 2025
Institutional positions in SEI Investments Co as of Sep 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
- 550
- −6 vs. Q2 2025
- Shares held
- 88.5M
- −812.5K (−0.9%) vs. Q2 2025
- Total value
- $7.51B
- −$521.0M (−6.5%) vs. Q2 2025
- New holders
- 60
- 209 more added
- Sold out
- 66
- 171 more reduced
8 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Amalgamated Bank | 45,763 | $3.88M | 0.03% | −132−0.3% | Reduced |
| Moran Wealth Management, LLC | 45,963 | $3.90M | 0.12% | −1,275−2.7% | Reduced |
| Janus Henderson Group PLC | 46,100 | $3.91M | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 46,210 | $3.92M | 0.03% | +6,537+16.5% | Added |
| Treasurer of the State of North Carolina | 46,766 | $3.97M | 0.01% | −139,563−74.9% | Reduced |
| KBC Group NV | 47,885 | $4.06M | 0.01% | +1,884+4.1% | Added |
| Pinebridge Investments, L.P. | 48,268 | $4.10M | 0.03% | −16,418−25.4% | Reduced |
| MetLife Investment Management | 48,458 | $4.11M | 0.02% | −2,643−5.2% | Reduced |
| Crestwood Advisors Group LLC | 48,797 | $4.14M | 0.07% | −152,396−75.7% | Reduced |
| Sanctuary Advisors, LLC | 49,000 | $4.16M | 0.02% | +7,883+19.2% | Added |
| Polar Asset Management Partners Inc. | 49,043 | $4.16M | 0.08% | +37,143+312.1% | Added |
| Holocene Advisors, LP | 49,163 | $4.17M | 0.01% | +49,163 | New |
| Prudential Financial Inc | 49,736 | $4.22M | 0.01% | +30,551+159.2% | Added |
| Mill Creek Capital Advisors, LLC | 49,971 | $4.24M | 0.09% | +49,971 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 50,795 | $4.31M | 0.01% | +7,552+17.5% | Added |
| ExodusPoint Capital Management, LP | 50,864 | $4.32M | 0.06% | +40,662+398.6% | Added |
| Magnetar Financial LLC | 51,675 | $4.38M | 0.03% | +38,601+295.3% | Added |
| CWM, LLC | 52,151 | $4.42M | 0.01% | −1,686−3.1% | Reduced |
| Ensign Peak Advisors, Inc | 52,473 | $4.45M | 0.01% | +1,830+3.6% | Added |
| APG Asset Management N.V. | 62,600 | $4.52M | 0.01% | 00.0% | Unchanged |
| Danske Bank A/S | 53,447 | $4.53M | 0.01% | −22,124−29.3% | Reduced |
| Court Place Advisors, LLC | 56,150 | $4.76M | 1.43% | 00.0% | Unchanged |
| HBK Sorce Advisory LLC | 57,910 | $4.78M | 0.12% | −240.0% | Reduced |
| IFG Advisory, LLC | 56,647 | $4.81M | 0.22% | +594+1.1% | Added |
| Vident Advisory, LLC | 56,656 | $4.81M | 0.05% | +37,996+203.6% | Added |
| Tudor Investment Corp Et Al | 56,699 | $4.81M | 0.03% | +56,699 | New |
| Mirae Asset Global Investments Co., Ltd. | 60,308 | $5.12M | 0.02% | +895+1.5% | Added |
| Prudential PLC | 61,633 | $5.23M | 0.04% | +57,953+1,574.8% | Added |
| Public Employees Retirement System of Ohio | 62,115 | $5.27M | 0.02% | −2,794−4.3% | Reduced |
| Amundi | 62,010 | $5.29M | 0.00% | −95,847−60.7% | Reduced |
| Horizon Investments, LLC | 62,493 | $5.30M | 0.07% | +24,952+66.5% | Added |
| CBOE Vest Financial, LLC | 62,543 | $5.31M | 0.07% | +8,217+15.1% | Added |
| Great West Life Assurance Co | 62,346 | $5.32M | 0.01% | −257−0.4% | Reduced |
| HSBC Holdings PLC | 63,316 | $5.35M | 0.00% | −3,245−4.9% | Reduced |
| Ashton Thomas Private Wealth, LLC | 63,902 | $5.42M | 0.14% | +49,676+349.2% | Added |
| Banco Santander, S.A. | 63,920 | $5.42M | 0.05% | 00.0% | Unchanged |
| Jain Global LLC | 64,248 | $5.45M | 0.07% | +50,833+378.9% | Added |
| Abn Amro Investment Solutions | 64,295 | $5.46M | 0.11% | −43,555−40.4% | Reduced |
| Summit Wealth Group LLC | 115,735 | $5.52M | 0.76% | +115,735 | New |
| Southernsun Asset Management, LLC | 66,497 | $5.64M | 0.73% | −453−0.7% | Reduced |
| Union Heritage Capital, LLC | 68,700 | $5.83M | 1.89% | 00.0% | Unchanged |
| RK Asset Management, LLC | 69,139 | $5.87M | 5.33% | −75−0.1% | Reduced |
| Illinois Municipal Retirement Fund | 69,971 | $5.94M | 0.08% | +23,018+49.0% | Added |
| Taylor Hoffman Capital Management LLC | 70,265 | $5.96M | 1.88% | +1,028+1.5% | Added |
| Susquehanna Portfolio Strategies, LLC | 71,629 | $6.08M | 0.10% | −28,967−28.8% | Reduced |
| Cerity Partners LLC | 72,036 | $6.11M | 0.01% | −10,397−12.6% | Reduced |
| Modera Wealth Management, LLC | 72,772 | $6.17M | 0.07% | −2,947−3.9% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 72,953 | $6.19M | 0.01% | +13,423+22.5% | Added |
| Manufacturers Life Insurance Company, The | 73,696 | $6.25M | 0.01% | −3,278−4.3% | Reduced |
| Umb Bank N A | 77,609 | $6.59M | 0.10% | +83+0.1% | Added |
| Price T Rowe Associates Inc | 77,852 | $6.61M | 0.00% | +5,548+7.7% | Added |
| Chevy Chase Trust Holdings, Inc. | 78,235 | $6.64M | 0.02% | −817−1.0% | Reduced |
| Thrive Wealth Management, LLC | 79,296 | $6.73M | 1.02% | +40,463+104.2% | Added |
| State of Wisconsin Investment Board | 85,681 | $7.27M | 0.02% | −6,782−7.3% | Reduced |
| Balyasny Asset Management LLC | 88,345 | $7.50M | 0.02% | +88,345 | New |
| Russell Investments Group, Ltd. | 91,796 | $7.79M | 0.01% | −53,207−36.7% | Reduced |
| Kathmere Capital Management, LLC | 93,022 | $7.89M | 0.56% | +19,000+25.7% | Added |
| Capital Fund Management S.A. | 95,285 | $8.08M | 0.08% | +47,683+100.2% | Added |
| Engineers Gate Manager LP | 97,094 | $8.24M | 0.09% | +9,977+11.5% | Added |
| California State Teachers Retirement System | 99,225 | $8.42M | 0.01% | −5,544−5.3% | Reduced |
| Schroder Investment Management Group | 99,697 | $8.52M | 0.01% | +13,545+15.7% | Added |
| Van Eck Associates Corp | 101,009 | $8.57M | 0.01% | −34,187−25.3% | Reduced |
| Teacher Retirement System of Texas | 102,295 | $8.68M | 0.03% | +7,584+8.0% | Added |
| Toroso Investments, LLC | 105,187 | $8.93M | 0.04% | +21,054+25.0% | Added |
| Bank of Montreal | 107,664 | $9.14M | 0.00% | −15,434−12.5% | Reduced |
| Hahn Capital Management LLC | 108,367 | $9.19M | 4.41% | −4,840−4.3% | Reduced |
| Truist Financial Corp | 108,625 | $9.22M | 0.01% | −6,528−5.7% | Reduced |
| Acadian Asset Management LLC | 109,183 | $9.26M | 0.02% | +4,496+4.3% | Added |
| Jane Street Group, LLC | 110,316 | $9.36M | 0.01% | −268,056−70.8% | Reduced |
| TD Asset Management Inc | 111,238 | $9.44M | 0.01% | −14,438−11.5% | Reduced |
| American Century Companies Inc | 112,137 | $9.51M | 0.00% | −4,024−3.5% | Reduced |
| LPL Financial LLC | 112,555 | $9.55M | 0.00% | +13,500+13.6% | Added |
| New York State Teachers Retirement System | 116,155 | $9.86M | 0.02% | −1,346−1.1% | Reduced |
| Wells Fargo & Company | 119,567 | $10.1M | 0.00% | +23,900+25.0% | Added |
| Rockefeller Capital Management L.P. | 119,886 | $10.2M | 0.02% | +19,849+19.8% | Added |
| M&G Plc | 122,508 | $10.4M | 0.06% | +122,508 | New |
| King Luther Capital Management Corp | 124,726 | $10.6M | 0.04% | −13,539−9.8% | Reduced |
| State Board of Administration of Florida Retirement System | 124,830 | $10.6M | 0.02% | −12,299−9.0% | Reduced |
| KLP Kapitalforvaltning AS | 126,900 | $10.8M | 0.04% | −28,600−18.4% | Reduced |
| Alliancebernstein L.P. | 129,975 | $11.0M | 0.00% | +3,442+2.7% | Added |
| Robeco Institutional Asset Management B.V. | 131,252 | $11.1M | 0.02% | +54,067+70.0% | Added |
| Victory Capital Management Inc | 135,162 | $11.5M | 0.01% | −18,374−12.0% | Reduced |
| Janney Montgomery Scott LLC | 139,287 | $11.8M | 0.03% | +3,776+2.8% | Added |
| Advisor Group Holdings, Inc. | 144,219 | $12.7M | 0.02% | +4,565+3.3% | Added |
| Quantinno Capital Management LP | 151,920 | $12.9M | 0.04% | +48,914+47.5% | Added |
| Schonfeld Strategic Advisors LLC | 155,388 | $13.2M | 0.09% | +11,703+8.1% | Added |
| Barclays PLC | 155,403 | $13.2M | 0.00% | +1,325+0.9% | Added |
| Foyston, Gordon, & Payne Inc | 155,513 | $13.2M | 2.88% | +4,032+2.7% | Added |
| Brandywine Global Investment Management, LLC | 166,317 | $14.1M | 0.10% | +11,740+7.6% | Added |
| Markel Group Inc.SuperinvestorMarkel Group | 173,200 | $14.7M | 0.12% | 00.0% | Unchanged |
| Allianz Asset Management GmbH | 174,266 | $14.8M | 0.02% | +30,411+21.1% | Added |
| Vestcor Inc | 174,337 | $14.8M | 0.44% | −135−0.1% | Reduced |
| Public Employees Retirement Association of Colorado | 178,435 | $15.1M | 0.06% | +174,290+4,204.8% | Added |
| Los Angeles Capital Management LLC | 194,201 | $16.5M | 0.06% | +123,701+175.5% | Added |
| State of Alaska, Department of Revenue | 198,116 | $16.8M | 0.17% | −549−0.3% | Reduced |
| California Public Employees Retirement System | 199,122 | $16.9M | 0.01% | +20,661+11.6% | Added |
| Leith Wheeler Investment Counsel Ltd. | 203,305 | $17.3M | 1.17% | +2,896+1.4% | Added |
| Interval Partners, LP | 203,914 | $17.3M | 0.37% | −25,839−11.2% | Reduced |
| Swiss National Bank | 205,100 | $17.4M | 0.01% | +1,000+0.5% | Added |
| Citadel Advisors LLC | 206,698 | $17.5M | 0.01% | +4,122+2.0% | Added |