Sei Investments CompanySEIC
13F holders, Q2 2026 (June 30)574holders +5
68new positions
61sold out
8famous investors
$87.70avg. 13F price*
At the end of Q2 2026, 574 institutions reported holding Sei Investments Company (SEIC) in their 13F filings, up 5 from Q1 2026. 68 opened new positions and 61 sold out. The largest holders were BlackRock, Inc. ($870.7M), Loomis Sayles & Co. L P ($744.0M) and Vanguard Portfolio Management LLC ($538.6M). 8 famous investors held it, including Tom Gayner (0.1% of Markel Group's portfolio), Ray Dalio (0.1% of Bridgewater Associates's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Sei Investments Company
- CUSIP
- 784117103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 68 | $97.8M |
| Exits | 61 | $84.0M |
All 13F filers, Q1 2026 → Q2 2026: 6,593,728 shares bought and 6,878,455 shares sold, net −284,727 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 574 holders
| BlackRock, Inc. | 0.01% | Reduce -1.8% | 9,927,545 | $870.7M |
| Loomis Sayles & Co. L P | 0.93% | Reduce -1.7% | 8,482,052 | $744.0M |
| Vanguard Portfolio Management LLC | 0.02% | Add +0.3% | 6,140,822 | $538.6M |
| Vanguard Capital Management LLC | 0.01% | Reduce -1.2% | 4,686,241 | $411.0M |
| State Street Corp. | 0.01% | Add +1.6% | 4,251,584 | $372.9M |
| Morgan Stanley | 0.02% | Reduce -14.1% | 4,119,203 | $361.3M |
| Boston Partners | 0.24% | Add +74.8% | 3,093,791 | $271.4M |
| Geode Capital Management, LLC | 0.01% | Add +4.3% | 2,953,161 | $259.1M |
| Bank of America Corp. | 0.02% | Reduce -0.4% | 2,908,071 | $255.1M |
| FMR LLC | 0.01% | Add +20.0% | 2,510,218 | $220.2M |
| Lord, Abbett & Co. LLC | 0.61% | Add +4.8% | 2,309,004 | $202.5M |
| Dimensional Fund Advisors LP | 0.03% | Add +4.8% | 1,962,762 | $172.1M |
| First Trust Advisors LP | 0.08% | Reduce -17.6% | 1,501,972 | $131.7M |
| Beutel, Goodman & Co Ltd. | 0.96% | Reduce -15.7% | 1,494,684 | $131.1M |
| Invesco Ltd. | 0.01% | Reduce -3.0% | 1,110,829 | $97.4M |
| Royce & Associates LP | 0.74% | Add +5.4% | 1,050,287 | $92.1M |
| Caisse de depot et placement du Quebec | 0.13% | Reduce -16.3% | 1,002,445 | $87.9M |
| Boston Trust Walden Corp | 0.66% | Reduce -4.7% | 991,300 | $86.9M |
| Northern Trust Corp. | 0.01% | Add +1.0% | 914,907 | $80.2M |
| Bank of New York Mellon Corp | 0.01% | Reduce -4.5% | 894,194 | $78.4M |
| Norges Bank | 0.01% | — | 887,116 | $77.8M |
| Barclays PLC | 0.02% | Add +116.6% | 825,215 | $72.4M |
| American Capital Management Inc. | 2.93% | Reduce -3.0% | 745,323 | $65.4M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -0.1% | 695,446 | $61.0M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Add +16.3% | 660,498 | $57.9M |
| Clark Capital Management Group, Inc. | 0.31% | Reduce -23.7% | 638,934 | $56.0M |
| Vanguard Fiduciary Trust Co. | 0.01% | Add +0.4% | 592,612 | $52.0M |
| Raymond James Financial Inc. | 0.01% | Add +2.0% | 583,800 | $51.2M |
| Jane Street Group, LLC | 0.03% | Add +9087.3% | 578,801 | $50.8M |
| Ameriprise Financial Inc. | 0.01% | Reduce -33.5% | 578,420 | $50.8M |
| First Financial Bankshares Inc | 0.91% | Reduce -0.3% | 552,780 | $48.5M |
| Quantinno Capital Management LP | 0.06% | Add +39.2% | 532,381 | $46.7M |
| Voloridge Investment Management, LLC | 0.19% | Add +25.9% | 518,314 | $45.5M |
| Franklin Resources Inc. | 0.01% | Reduce -47.8% | 512,826 | $45.0M |
| Envestnet Asset Management Inc. | 0.01% | Reduce -4.0% | 478,365 | $42.0M |
| Natixis Advisors, LLC | 0.05% | Reduce -1.7% | 461,891 | $40.5M |
| Goldman Sachs Group Inc. | 0.00% | Add +42.3% | 461,227 | $40.5M |
| Azora Capital LP | 1.64% | New | 443,189 | $38.9M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.07% | Add +22.9% | 421,046 | $36.9M |
| JPMorgan Chase & Co. | 0.00% | Reduce -18.7% | 375,392 | $32.9M |
| AQR Capital Management | 0.01% | Reduce -20.4% | 334,349 | $29.3M |
| Thrivent Financial for Lutherans | 0.05% | Reduce -0.3% | 324,567 | $28.5M |
| ProShare Advisors LLC | 0.04% | Add +6.2% | 319,375 | $28.0M |
| Arbejdsmarkedets Tillaegspension | 0.60% | Reduce -3.0% | 313,600 | $27.5M |
| Balyasny Asset Management L.P. | 0.05% | Add +36.5% | 308,050 | $27.0M |
| UBS Group AG | 0.00% | Reduce -2.9% | 307,430 | $27.0M |
| Rhumbline Advisers | 0.02% | Reduce -1.9% | 303,552 | $26.6M |
| Public Employees Retirement Association of Colorado | 0.09% | Add +37.0% | 300,935 | $26.4M |
| Renaissance Technologies | 0.03% | Reduce -28.8% | 284,726 | $25.0M |
| Victory Capital Management Inc. | 0.01% | Reduce -36.9% | 269,995 | $23.7M |
| Millennium Management | 0.02% | Add +124.2% | 266,217 | $23.3M |
| JLB & Associates Inc. | 3.07% | Add +0.9% | 261,576 | $22.9M |
| Retirement Systems of Alabama | 0.07% | Reduce -7.1% | 253,332 | $22.2M |
| Rockefeller Capital Management L.P. | 0.03% | Add +49.5% | 228,023 | $20.0M |
| Tidal Investments LLC | 0.05% | Add +40.4% | 226,700 | $19.9M |
| Interval Partners, LP | 0.64% | Add +65.9% | 226,022 | $19.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -52.6% | 216,054 | $19.0M |
| Principal Financial Group Inc. | 0.01% | Reduce -0.0% | 207,644 | $18.2M |
| California Public Employees Retirement System | 0.01% | Add +3.5% | 205,471 | $18.0M |
| Swiss National Bank | 0.01% | Reduce -1.7% | 202,400 | $17.8M |
| Alps Advisors Inc. | 0.08% | Reduce -6.0% | 201,072 | $17.6M |
| Crestwood Advisors Group, LLC | 0.26% | Add +0.5% | 197,095 | $17.3M |
| Amundi | 0.00% | Add +2.4% | 193,135 | $16.9M |
| Nuveen, LLC | 0.00% | Add +5.9% | 185,536 | $16.3M |
| Leith Wheeler Investment Counsel Ltd. | 1.16% | Reduce -11.1% | 174,506 | $15.3M |
| Markel Group | 0.12% | No change | 173,200 | $15.2M |
| Royal Bank of Canada | 0.00% | Reduce -61.4% | 161,039 | $14.1M |
| BI Asset Management Fondsmaeglerselskab A/S | 0.11% | Add +127.9% | 160,582 | $14.1M |
| Foyston, Gordon & Payne Inc | 2.98% | Add +0.1% | 157,958 | $13.9M |
| LPL Financial LLC | 0.00% | Reduce -5.9% | 156,953 | $13.8M |
| Bridgewater Associates | 0.05% | Reduce -37.9% | 144,423 | $12.7M |
| Osaic Holdings, Inc. | 0.01% | Reduce -6.6% | 141,682 | $12.4M |
| Prana Capital Management, LP | 0.37% | Reduce -70.0% | 139,223 | $12.2M |
| Legal & General Group Plc | 0.00% | Reduce -27.7% | 136,376 | $12.0M |
| Wells Fargo & Company | 0.00% | Add +16.2% | 130,780 | $11.5M |
| KLP Kapitalforvaltning As | 0.04% | No change | 127,800 | $11.2M |
| Wealth Enhancement Advisory Services, LLC | 0.02% | Add +813.6% | 119,448 | $11.1M |
| Two Sigma Investments, LP | 0.01% | Add +518.0% | 118,660 | $10.4M |
| California State Teachers Retirement System | 0.01% | Reduce -6.8% | 117,300 | $10.3M |
| Bank of Montreal | 0.00% | Add +2.7% | 116,432 | $10.2M |
| King Luther Capital Management Corp. | 0.04% | Add +1.6% | 111,077 | $9.7M |
| Alliancebernstein L.P. | 0.00% | Reduce -5.7% | 119,244 | $9.4M |
| Truist Financial Corp. | 0.01% | Reduce -3.8% | 106,452 | $9.3M |
| Fideuram Asset Management (Ireland) dac | 0.17% | New | 113,187 | $9.1M |
| State Board of Administration of Florida Retirement System | 0.01% | Reduce -5.4% | 103,180 | $9.0M |
| Van Eck Associates Corp. | 0.01% | Reduce -3.1% | 102,923 | $9.0M |
| Corient Private Wealth LP | 0.01% | Add +11.1% | 102,534 | $9.0M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.01% | Add +13.2% | 101,909 | $8.9M |
| New York State Teachers Retirement System | 0.02% | Reduce -6.4% | 101,601 | $8.9M |
| American Century Companies Inc. | 0.00% | Add +6.6% | 101,518 | $8.9M |
| Kathmere Capital Management, LLC | 0.47% | Add +1.1% | 100,611 | $8.8M |
| Stifel Financial Corp. | 0.01% | Reduce -1.4% | 99,780 | $8.8M |
| T. Rowe Price Associates Inc. | 0.00% | Add +6.6% | 97,931 | $8.6M |
| Creative Planning | 0.00% | Reduce -17.8% | 95,983 | $8.4M |
| Citigroup Inc. | 0.00% | Add +174.1% | 93,051 | $8.2M |
| Citadel Advisors | 0.00% | Add +120.2% | 92,433 | $8.1M |
| Schonfeld Strategic Advisors LLC | 0.04% | Add +55.6% | 90,061 | $7.9M |
| Karl Kapital LLC | 4.64% | Add +23.1% | 88,816 | $7.8M |
| Man Group plc | 0.01% | Reduce -75.8% | 87,503 | $7.7M |
| Horizon Investments, LLC | 0.08% | Add +2701.7% | 86,966 | $7.6M |
"% of holder's portfolio" is SEIC's weight in each manager's 13F, not the share of Sei Investments Company the manager owns.