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 |
|---|---|---|---|---|---|
| Principal Financial Group Inc | 208,988 | $17.7M | 0.01% | −5,920−2.8% | Reduced |
| Martingale Asset Management L P | 216,904 | $18.4M | 0.46% | −11,100−4.9% | Reduced |
| Legal & General Group Plc | 229,985 | $19.5M | 0.00% | −11,546−4.8% | Reduced |
| Nuveen, LLC | 236,113 | $20.0M | 0.01% | −663−0.3% | Reduced |
| Alps Advisors Inc | 236,376 | $20.1M | 0.11% | −40,073−14.5% | Reduced |
| Goldman Sachs Group Inc | 240,350 | $20.4M | 0.00% | −183,544−43.3% | Reduced |
| Thrivent Financial for Lutherans | 252,231 | $21.4M | 0.04% | +147,938+141.8% | Added |
| Bridgewater Associates, LP | 262,502 | $22.3M | 0.09% | +132,915+102.6% | Added |
| JLB & Associates Inc | 266,544 | $22.6M | 2.97% | −1,717−0.6% | Reduced |
| Jupiter Asset Management Ltd | 277,462 | $23.5M | 0.20% | −139,743−33.5% | Reduced |
| Retirement Systems of Alabama | 289,851 | $24.6M | 0.08% | +15,222+5.5% | Added |
| Man Group plc | 314,194 | $26.7M | 0.05% | +91,241+40.9% | Added |
| Rhumbline Advisers | 326,240 | $27.7M | 0.02% | +9,859+3.1% | Added |
| Arrowstreet Capital, Limited Partnership | 329,970 | $28.0M | 0.02% | −36,772−10.0% | Reduced |
| Envestnet Asset Management Inc | 361,436 | $30.7M | 0.01% | +5,399+1.5% | Added |
| JPMorgan Chase & Co | 381,134 | $32.3M | 0.00% | +9,106+2.4% | Added |
| Renaissance Technologies LLC | 386,926 | $32.8M | 0.04% | −35,000−8.3% | Reduced |
| ProShare Advisors LLC | 389,621 | $33.1M | 0.07% | −62,533−13.8% | Reduced |
| Voloridge Investment Management, LLC | 406,237 | $34.5M | 0.12% | +120,540+42.2% | Added |
| UBS Group AG | 443,722 | $37.6M | 0.01% | +62,628+16.4% | Added |
| AQR Capital Management LLC | 467,344 | $39.7M | 0.03% | +74,839+19.1% | Added |
| Natixis Advisors, L.P. | 511,066 | $43.4M | 0.06% | −18,568−3.5% | Reduced |
| Raymond James Financial Inc | 528,314 | $44.8M | 0.01% | −14,277−2.6% | Reduced |
| American Capital Management Inc | 565,117 | $48.0M | 1.91% | +101,341+21.9% | Added |
| Franklin Resources Inc | 638,486 | $54.2M | 0.01% | +93,127+17.1% | Added |
| Millennium Management LLC | 655,689 | $55.6M | 0.04% | +74,255+12.8% | Added |
| Charles Schwab Investment Management Inc | 662,458 | $56.2M | 0.01% | −4,123−0.6% | Reduced |
| Prana Capital Management, LP | 711,311 | $60.4M | 2.01% | +269,023+60.8% | Added |
| Qube Research & Technologies Ltd | 766,775 | $65.1M | 0.09% | +346,696+82.5% | Added |
| Ameriprise Financial Inc | 815,694 | $69.2M | 0.02% | +221,033+37.2% | Added |
| UBS Asset Management Americas Inc | 883,753 | $75.0M | 0.02% | +22,263+2.6% | Added |
| Royce & Associates LP | 903,583 | $76.7M | 0.76% | −323,169−26.3% | Reduced |
| Northern Trust Corp | 922,620 | $78.3M | 0.01% | +8,155+0.9% | Added |
| Royal Bank of Canada | 951,082 | $80.7M | 0.01% | −172,054−15.3% | Reduced |
| Bank of New York Mellon Corp | 1,013,911 | $86.0M | 0.02% | −6,428−0.6% | Reduced |
| Boston Trust Walden Corp | 1,105,409 | $93.8M | 0.69% | −264,265−19.3% | Reduced |
| Caisse de Depot Et Placement du Quebec | 1,343,757 | $114.0M | 0.21% | +317,703+31.0% | Added |
| FMR LLC | 1,349,630 | $114.5M | 0.01% | +511,552+61.0% | Added |
| Lord, Abbett & Co. LLC | 1,608,382 | $136.5M | 0.41% | +125,533+8.5% | Added |
| First Trust Advisors LP | 1,725,019 | $146.4M | 0.11% | −2,315−0.1% | Reduced |
| Invesco Ltd. | 1,731,523 | $146.9M | 0.02% | +68,873+4.1% | Added |
| Dimensional Fund Advisors LP | 1,863,052 | $158.1M | 0.03% | +31,953+1.7% | Added |
| Beutel, Goodman & Co Ltd. | 2,022,950 | $171.6M | 1.03% | −577,666−22.2% | Reduced |
| Geode Capital Management, LLC | 2,784,343 | $236.3M | 0.02% | +208,306+8.1% | Added |
| Bank of America Corp | 3,121,067 | $264.8M | 0.02% | −39,569−1.3% | Reduced |
| State Street Corp | 4,536,582 | $384.9M | 0.01% | −208,903−4.4% | Reduced |
| Morgan Stanley | 5,593,742 | $474.6M | 0.03% | −40,586−0.7% | Reduced |
| Loomis Sayles & Co L P | 8,976,049 | $761.6M | 0.91% | +134,800+1.5% | Added |
| BlackRock, Inc. | 9,262,602 | $785.9M | 0.01% | +60,582+0.7% | Added |
| Vanguard Group Inc | 11,260,591 | $955.5M | 0.01% | +30,970+0.3% | Added |
| Erste Asset Management GmbH | 0 | $0 | 0.00% | −11,400−100.0% | Sold out |
| Azora Capital LP | 0 | $0 | 0.00% | −777,952−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −249,399−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −145,566−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −133,094−100.0% | Sold out |
| Bank of Nova Scotia | 0 | $0 | 0.00% | −117,000−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −103,030−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −67,666−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −57,884−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −56,147−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −53,278−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −47,985−100.0% | Sold out |
| Maltese Capital Management LLC | 0 | $0 | 0.00% | −45,000−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −40,700−100.0% | Sold out |
| Kingsview Wealth Management, LLC | 0 | $0 | 0.00% | −38,452−100.0% | Sold out |
| Point72 Hong Kong Ltd | 0 | $0 | 0.00% | −25,260−100.0% | Sold out |
| Investment Management Corp of Ontario | 0 | $0 | 0.00% | −23,434−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −20,570−100.0% | Sold out |
| ISAM Funds (UK) Ltd | 0 | $0 | 0.00% | −20,072−100.0% | Sold out |
| Ontario Teachers Pension Plan Board | 0 | $0 | 0.00% | −19,640−100.0% | Sold out |
| Lecap Asset Management Ltd | 0 | $0 | 0.00% | −19,523−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −17,934−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −15,307−100.0% | Sold out |
| Grantham, Mayo, Van Otterloo & Co. LLC | 0 | $0 | 0.00% | −13,224−100.0% | Sold out |
| 1832 Asset Management L.P. | 0 | $0 | 0.00% | −11,043−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −10,667−100.0% | Sold out |
| 111 Capital | 0 | $0 | 0.00% | −10,467−100.0% | Sold out |
| NewEdge Wealth, LLC | 0 | $0 | 0.00% | −7,861−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −7,123−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −7,037−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −6,652−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −6,644−100.0% | Sold out |
| Fullerton Fund Management Co Ltd. | 0 | $0 | 0.00% | −6,415−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −5,559−100.0% | Sold out |
| Standard Life Aberdeen plc | 0 | $0 | 0.00% | −5,064−100.0% | Sold out |
| Harvest Investment Services, LLC | 0 | $0 | 0.00% | −5,021−100.0% | Sold out |
| Financial Advocates Investment Management | 0 | $0 | 0.00% | −4,569−100.0% | Sold out |
| TownSquare Capital, LLC | 0 | $0 | 0.00% | −4,333−100.0% | Sold out |
| Oxford Asset Management LLP | 0 | $0 | 0.00% | −4,048−100.0% | Sold out |
| Par Capital Management Inc | 0 | $0 | 0.00% | −3,500−100.0% | Sold out |
| Applied Finance Capital Management, LLC | 0 | $0 | 0.00% | −3,238−100.0% | Sold out |
| M&T Bank Corp | 0 | $0 | 0.00% | −3,217−100.0% | Sold out |
| Change Path, LLC | 0 | $0 | 0.00% | −2,837−100.0% | Sold out |
| Pitcairn Co | 0 | $0 | 0.00% | −2,549−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −2,399−100.0% | Sold out |
| Koshinski Asset Management, Inc. | 0 | $0 | 0.00% | −2,346−100.0% | Sold out |
| Paces Ferry Wealth Advisors, LLC | 0 | $0 | 0.00% | −2,300−100.0% | Sold out |
| Chicago Partners Investment Group LLC | 0 | $0 | 0.00% | −2,282−100.0% | Sold out |
| Meiji Yasuda Asset Management Co Ltd. | 0 | $0 | 0.00% | −2,269−100.0% | Sold out |
| Claro Advisors LLC | 0 | $0 | 0.00% | −2,241−100.0% | Sold out |