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, Q1 2026
Institutional positions in SEI Investments Co as of Mar 31, 2026. 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
- 569
- +16 vs. Q4 2025
- Shares held
- 90.0M
- +13.0M (+16.8%) vs. Q4 2025
- Total value
- $7.06B
- +$740.6M (+11.7%) vs. Q4 2025
- New holders
- 76
- 217 more added
- Sold out
- 60
- 179 more reduced
9 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding SEI Investments Co; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Credit Agricole S A | 34,621 | $2.72M | 0.01% | 00.0% | Unchanged |
| Diversified Trust Co | 35,492 | $2.79M | 0.05% | +1,783+5.3% | Added |
| Mutual of America Capital Management LLC | 35,599 | $2.79M | 0.03% | −3,128−8.1% | Reduced |
| Abn Amro Investment Solutions | 35,810 | $2.81M | 0.04% | −10,475−22.6% | Reduced |
| Allstate Corp | 36,312 | $2.85M | 0.03% | +36,312 | New |
| Third View Private Wealth, LLC | 36,505 | $2.86M | 0.39% | +2,276+6.6% | Added |
| Colony Group, LLC | 36,819 | $2.91M | 0.00% | +7,832+27.0% | Added |
| Johnson Investment Counsel Inc | 37,072 | $2.91M | 0.02% | +190+0.5% | Added |
| Wealth Alliance Advisory Group, LLC | 37,504 | $2.94M | 0.47% | 00.0% | Unchanged |
| Worldquant Millennium Advisors LLC | 37,536 | $2.95M | 0.01% | −682−1.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 37,708 | $2.96M | 0.01% | +6,885+22.3% | Added |
| Vanguard Global Advisers, LLC | 37,926 | $2.98M | 0.00% | +37,926 | New |
| Lazard Asset Management LLC | 38,037 | $2.98M | 0.00% | +17,504+85.2% | Added |
| Cetera Investment Advisers | 38,040 | $2.98M | 0.00% | +9,086+31.4% | Added |
| State of Tennessee, Treasury Department | 38,835 | $3.05M | 0.01% | 00.0% | Unchanged |
| Atria Investments LLC | 39,457 | $3.10M | 0.03% | −91−0.2% | Reduced |
| KBC Group NV | 39,715 | $3.12M | 0.01% | −6,912−14.8% | Reduced |
| Ingalls & Snyder LLC | 39,853 | $3.13M | 0.11% | +700+1.8% | Added |
| US Bancorp | 39,926 | $3.13M | 0.00% | +1,558+4.1% | Added |
| BNP Paribas Arbitrage, SA | 40,217 | $3.16M | 0.00% | +1,670+4.3% | Added |
| Bokf, NA | 40,387 | $3.17M | 0.05% | −722−1.8% | Reduced |
| Brandes Investment Partners, LP | 40,604 | $3.19M | 0.02% | +4,941+13.9% | Added |
| Oxbow Advisors, LLC | 41,842 | $3.28M | 0.28% | +41,842 | New |
| New York State Common Retirement Fund | 41,900 | $3.29M | 0.00% | −1,200−2.8% | Reduced |
| Citadel Advisors LLC | 41,969 | $3.29M | 0.00% | −110,307−72.4% | Reduced |
| Holocene Advisors, LP | 42,056 | $3.30M | 0.01% | −477−1.1% | Reduced |
| Zacks Investment Management | 42,459 | $3.33M | 0.03% | +6,796+19.1% | Added |
| Amalgamated Bank | 42,667 | $3.35M | 0.03% | +1,137+2.7% | Added |
| Moran Wealth Management, LLC | 42,956 | $3.37M | 0.10% | −1,198−2.7% | Reduced |
| Henshaw Capital LLC | 43,101 | $3.38M | 0.13% | +258+0.6% | Added |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 43,464 | $3.41M | 0.12% | +4,247+10.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 43,594 | $3.42M | 0.03% | +471+1.1% | Added |
| Treasurer of the State of North Carolina | 43,797 | $3.44M | 0.01% | +935+2.2% | Added |
| Engineers Gate Manager LP | 44,033 | $3.46M | 0.04% | −76,688−63.5% | Reduced |
| Nisa Investment Advisors, LLC | 44,127 | $3.46M | 0.01% | +275+0.6% | Added |
| Vident Advisory, LLC | 45,028 | $3.53M | 0.03% | −12,627−21.9% | Reduced |
| Janus Henderson Group PLC | 45,122 | $3.54M | 0.00% | 00.0% | Unchanged |
| Allianz Asset Management GmbH | 45,291 | $3.55M | 0.00% | −31,711−41.2% | Reduced |
| New Age Alpha Advisors, LLC | 45,556 | $3.57M | 0.17% | −1,597−3.4% | Reduced |
| MetLife Investment Management | 45,851 | $3.60M | 0.02% | +231+0.5% | Added |
| Y-Intercept (Hong Kong) Ltd | 46,201 | $3.63M | 0.07% | +46,201 | New |
| Morningstar Investment Management LLC | 46,245 | $3.63M | 0.22% | +10,091+27.9% | Added |
| Banco Santander, S.A. | 47,549 | $3.73M | 0.03% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 47,603 | $3.73M | 0.00% | −7,827−14.1% | Reduced |
| APG Asset Management N.V. | 54,829 | $3.73M | 0.01% | −3,992−6.8% | Reduced |
| Illinois Municipal Retirement Fund | 48,039 | $3.77M | 0.05% | −8,177−14.5% | Reduced |
| Sanctuary Advisors, LLC | 48,609 | $3.81M | 0.02% | −453−0.9% | Reduced |
| CWM Advisors, LLC | 49,401 | $3.88M | 0.23% | +11,884+31.7% | Added |
| ExodusPoint Capital Management, LP | 50,212 | $3.94M | 0.04% | −15,183−23.2% | Reduced |
| Mill Creek Capital Advisors, LLC | 51,309 | $4.03M | 0.08% | +1,325+2.7% | Added |
| MAI Capital Management | 53,987 | $4.24M | 0.02% | +1,427+2.7% | Added |
| Public Employees Retirement System of Ohio | 57,086 | $4.48M | 0.01% | −2,992−5.0% | Reduced |
| Capital Fund Management S.A. | 57,174 | $4.49M | 0.04% | −64,216−52.9% | Reduced |
| Schonfeld Strategic Advisors LLC | 57,890 | $4.54M | 0.04% | −89,410−60.7% | Reduced |
| Los Angeles Capital Management LLC | 58,357 | $4.58M | 0.02% | −9,385−13.9% | Reduced |
| HBK Sorce Advisory LLC | 51,788 | $4.72M | 0.10% | +78+0.2% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 61,302 | $4.81M | 0.01% | −5,816−8.7% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 63,199 | $4.96M | 0.01% | +148+0.2% | Added |
| TD Waterhouse Canada Inc. | 63,694 | $4.96M | 0.01% | +53,974+555.3% | Added |
| Modera Wealth Management, LLC | 66,355 | $5.21M | 0.06% | −4,255−6.0% | Reduced |
| Southernsun Asset Management, LLC | 67,403 | $5.29M | 0.77% | +913+1.4% | Added |
| Union Heritage Capital, LLC | 68,700 | $5.39M | 2.00% | 00.0% | Unchanged |
| BI Asset Management Fondsmaeglerselskab A/S | 70,449 | $5.53M | 0.06% | +70,449 | New |
| Manufacturers Life Insurance Company, The | 70,686 | $5.55M | 0.00% | −1,196−1.7% | Reduced |
| Great West Life Assurance Co | 71,136 | $5.58M | 0.01% | −1,504−2.1% | Reduced |
| Karl Kapital LLC | 72,140 | $5.66M | 3.92% | +29,068+67.5% | Added |
| Chevy Chase Trust Holdings, Inc. | 72,251 | $5.67M | 0.02% | −3,743−4.9% | Reduced |
| Taylor Hoffman Capital Management LLC | 72,405 | $5.68M | 1.75% | +1,183+1.7% | Added |
| Thrive Wealth Management, LLC | 76,779 | $6.02M | 0.90% | −4,390−5.4% | Reduced |
| CBOE Vest Financial, LLC | 82,571 | $6.48M | 0.08% | +11,747+16.6% | Added |
| HSBC Holdings PLC | 83,464 | $6.57M | 0.00% | −97,252−53.8% | Reduced |
| Hahn Capital Management LLC | 84,374 | $6.62M | 4.16% | −17,503−17.2% | Reduced |
| Martingale Asset Management L P | 85,530 | $6.71M | 0.17% | −237−0.3% | Reduced |
| State of Wisconsin Investment Board | 86,845 | $6.81M | 0.02% | −1,595−1.8% | Reduced |
| Vanguard Asset Management, Ltd | 90,046 | $7.07M | 0.01% | +90,046 | New |
| CI Private Wealth, LLC | 92,288 | $7.18M | 0.01% | +74,117+407.9% | Added |
| Price T Rowe Associates Inc | 91,883 | $7.21M | 0.00% | +10,915+13.5% | Added |
| American Century Companies Inc | 95,230 | $7.47M | 0.00% | −33,277−25.9% | Reduced |
| Kathmere Capital Management, LLC | 99,485 | $7.81M | 0.48% | +6,551+7.0% | Added |
| Stifel Financial Corp | 101,218 | $7.94M | 0.01% | +4,533+4.7% | Added |
| Teacher Retirement System of Texas | 103,241 | $8.10M | 0.03% | −17,684−14.6% | Reduced |
| Robeco Institutional Asset Management B.V. | 104,774 | $8.22M | 0.01% | +16,988+19.4% | Added |
| Van Eck Associates Corp | 106,220 | $8.34M | 0.01% | +3,830+3.7% | Added |
| TD Asset Management Inc | 107,556 | $8.44M | 0.01% | −2,644−2.4% | Reduced |
| New York State Teachers Retirement System | 108,584 | $8.52M | 0.02% | −3,245−2.9% | Reduced |
| State Board of Administration of Florida Retirement System | 109,091 | $8.56M | 0.02% | −7,279−6.3% | Reduced |
| King Luther Capital Management Corp | 109,370 | $8.58M | 0.04% | −28,069−20.4% | Reduced |
| Truist Financial Corp | 110,666 | $8.68M | 0.01% | −629−0.6% | Reduced |
| Vestcor Inc | 111,618 | $8.76M | 0.24% | −62,719−36.0% | Reduced |
| Wells Fargo & Company | 112,519 | $8.83M | 0.00% | +5,047+4.7% | Added |
| Bank of Montreal | 113,367 | $8.90M | 0.00% | +7,290+6.9% | Added |
| Creative Planning | 116,827 | $9.17M | 0.01% | +6,786+6.2% | Added |
| Millennium Management LLC | 118,765 | $9.32M | 0.01% | −252,870−68.0% | Reduced |
| Qube Research & Technologies Ltd | 124,992 | $9.81M | 0.01% | −438,220−77.8% | Reduced |
| California State Teachers Retirement System | 125,866 | $9.88M | 0.01% | +26,839+27.1% | Added |
| KLP Kapitalforvaltning AS | 127,800 | $10.0M | 0.04% | +600+0.5% | Added |
| Alliancebernstein L.P. | 126,476 | $10.4M | 0.00% | +1,490+1.2% | Added |
| Janney Montgomery Scott LLC | 132,908 | $10.4M | 0.03% | −16,003−10.7% | Reduced |
| Interval Partners, LP | 136,227 | $10.7M | 0.37% | −48,669−26.3% | Reduced |
| Advisor Group Holdings, Inc. | 151,682 | $11.9M | 0.02% | +1,606+1.1% | Added |