Latest Period
Q1 2026
Security Snapshot
SEI INVESTMENTS CO - Common Stock (SEIC) Institutional Ownership
CUSIP: 784117103
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
564
Shares (Excl. Options)
89,963,097
Price
$78.47
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- Security type / class
- Equity / Common Stock
- Symbol
- SEIC on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 89,963,097
- Total 13F value
- $7,059,166,879
- Portfolio coverage rank
- 0.01%
- Share change
- +642,065
- Value change
- +$44,134,722
- Number of holders
- 564
- Shares outstanding
- 122,303,095
- SEC-reported price per share
- $92.29
- Insider filing price
- $92.29
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SEIC - SEI INVESTMENTS CO - Common Stock is tracked under CUSIP 784117103.
- 564 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 558 to 564 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $7,308,149,236 to $7,059,166,879.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 564 institutions filings for Q1 2026.
Security key
784117103
Latest holder period
Q1 2026
13F holders
564
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
SEIC full holder history
SEI INVESTMENTS CO SEC filings
SEI INVESTMENTS CO company facts
SEI INVESTMENTS CO insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 784117103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
SEIC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| LOOMIS SAYLES & CO L P | 7.1% | -1.3% | $684,261,359 | -$9,875,610 | 8,683,520 | -1.4% | Loomis, Sayles & Co., L.P. | 31 Mar 2026 |
| BlackRock, Inc. | 6.8% | $763,130,029 | 8,492,433 | BlackRock, Inc. | 30 Jun 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5% | $481,650,979 | 6,138,027 | Vanguard Portfolio Management | 31 Mar 2026 |
As of 31 Mar 2026, 564 institutional investors reported holding 89,963,097 shares of SEI INVESTMENTS CO - Common Stock (SEIC). This represents 74% of the company’s total 122,303,095 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
54%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.3% | 10,110,337 | +4.9% | 0.01% | $793,358,144 |
| LOOMIS SAYLES & CO L P | 7.1% | 8,628,879 | -1.3% | 0.92% | $677,108,102 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5% | 6,125,643 | 0% | 0.03% | $480,679,206 |
| MORGAN STANLEY | 3.9% | 4,792,279 | -5.6% | 0.02% | $376,050,359 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9% | 4,741,716 | 0% | 0.01% | $372,082,455 |
| STATE STREET CORP | 3.4% | 4,185,178 | -2.3% | 0.01% | $328,410,918 |
| BANK OF AMERICA CORP /DE/ | 2.4% | 2,920,506 | -0.06% | 0.02% | $229,172,087 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 2,830,332 | -2.2% | 0.01% | $222,125,134 |
| LORD, ABBETT & CO. LLC | 1.8% | 2,204,379 | +15% | 0.57% | $172,978,000 |
| FMR LLC | 1.7% | 2,092,499 | +56% | 0.01% | $164,198,460 |
| DIMENSIONAL FUND ADVISORS LP | 1.5% | 1,873,198 | +1.1% | 0.03% | $146,983,892 |
| FIRST TRUST ADVISORS LP | 1.5% | 1,822,669 | +1.2% | 0.1% | $143,024,791 |
| Beutel, Goodman & Co Ltd. | 1.4% | 1,773,154 | -5.8% | 0.94% | $139,139,000 |
| Boston Partners | 1.4% | 1,770,039 | 0.15% | $138,887,658 | |
| Caisse de depot et placement du Quebec | 0.98% | 1,198,089 | -13% | 0.15% | $94,014,044 |
| Invesco Ltd. | 0.94% | 1,145,404 | -34% | 0.01% | $89,879,852 |
| Boston Trust Walden Corp | 0.85% | 1,039,731 | -4.2% | 0.67% | $81,587,687 |
| ROYCE & ASSOCIATES LP | 0.81% | 996,456 | +9.9% | 0.77% | $78,191,902 |
| FRANKLIN RESOURCES INC | 0.8% | 983,113 | +20% | 0.02% | $77,144,877 |
| Bank of New York Mellon Corp | 0.77% | 936,302 | -5.5% | 0.01% | $73,471,656 |
| NORTHERN TRUST CORP | 0.74% | 905,607 | +1.6% | 0.01% | $71,062,981 |
| AMERIPRISE FINANCIAL INC | 0.71% | 869,549 | +5.9% | 0.02% | $68,235,990 |
| Clark Capital Management Group, Inc. | 0.69% | 837,845 | +30% | 0.41% | $65,745,661 |
| AMERICAN CAPITAL MANAGEMENT INC | 0.63% | 768,615 | +34% | 3.2% | $60,313,219 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.57% | 696,473 | +4.8% | 0.01% | $54,652,236 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 89,963,097 | $7,059,166,879 | +$44,134,722 | $78.47 | 564 |
| 2025 Q4 | 89,065,067 | $7,308,149,236 | -$25,671,443 | $82.02 | 558 |
| 2025 Q3 | 88,500,358 | $7,504,542,530 | -$142,914,171 | $84.85 | 543 |
| 2025 Q2 | 89,996,791 | $8,086,749,486 | -$241,304,437 | $89.86 | 560 |
| 2025 Q1 | 93,078,509 | $7,221,081,350 | +$135,974,270 | $77.63 | 540 |
| 2024 Q4 | 90,860,819 | $7,496,265,900 | -$84,798,545 | $82.48 | 535 |
| 2024 Q3 | 91,408,967 | $6,326,418,115 | -$89,117,798 | $69.19 | 494 |
| 2024 Q2 | 92,827,829 | $6,005,002,909 | -$72,432,990 | $64.69 | 488 |
| 2024 Q1 | 93,963,846 | $6,750,927,822 | +$91,087,323 | $71.90 | 470 |
| 2023 Q4 | 92,671,469 | $5,889,760,642 | -$43,838,780 | $63.55 | 486 |
| 2023 Q3 | 93,440,911 | $5,627,046,231 | +$39,881,264 | $60.23 | 453 |
| 2023 Q2 | 92,699,611 | $5,525,502,035 | -$5,689,252 | $59.62 | 451 |
| 2023 Q1 | 92,989,428 | $5,350,400,582 | -$21,158,711 | $57.55 | 435 |
| 2022 Q4 | 93,328,471 | $5,446,090,348 | +$313,819,699 | $58.30 | 439 |
| 2022 Q3 | 94,253,545 | $4,625,052,598 | -$103,218,911 | $49.05 | 422 |
| 2022 Q2 | 95,708,791 | $5,170,371,695 | -$474,050 | $54.02 | 442 |
| 2022 Q1 | 96,287,080 | $5,803,728,067 | -$63,861,826 | $60.21 | 449 |
| 2021 Q4 | 97,405,421 | $5,938,118,719 | +$30,926,527 | $60.94 | 464 |
| 2021 Q3 | 96,609,015 | $5,729,571,656 | -$53,360,996 | $59.30 | 436 |
| 2021 Q2 | 97,510,206 | $6,041,796,603 | -$29,237,166 | $61.97 | 432 |
| 2021 Q1 | 98,014,219 | $5,970,919,170 | +$17,213,923 | $60.93 | 434 |
| 2020 Q4 | 97,723,072 | $5,615,781,729 | -$101,198,397 | $57.47 | 431 |
| 2020 Q3 | 101,188,427 | $5,128,751,863 | -$239,316,375 | $50.72 | 416 |
| 2020 Q2 | 104,231,279 | $5,727,336,107 | -$294,400,930 | $54.98 | 415 |
| 2020 Q1 | 110,089,700 | $5,103,615,060 | -$81,271,655 | $46.34 | 404 |