Latest Period
Q2 2026
Security Snapshot
SEI Investments Co - Common Stock (SEIC) Institutional Ownership
CUSIP: 784117103
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
419
Shares (Excl. Options)
49,124,354
Price
$87.71
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- Security type / class
- Equity / Common Stock
- Symbol
- SEIC on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 49,124,354
- Total 13F value
- $4,309,309,280
- Portfolio coverage rank
- 0%
- Share change
- -673,305
- Value change
- -$51,946,674
- Number of holders
- 419
- Shares outstanding
- 120,200,577
- SEC-reported price per share
- $95.45
- Insider filing price
- $95.45
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.
- 419 institutions reported positions in Q2 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 567 to 419 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $7,060,379,524 to $4,309,309,280.
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 419 institutions filings for Q2 2026.
Security key
784117103
Latest holder period
Q2 2026
13F holders
419
13D/G owners
3
CIK / CUSIP context first
Open Q2 2026 holders
SEIC full holder history
SEI INVESTMENTS CO SEC filings
SEI INVESTMENTS CO company facts
SEI INVESTMENTS CO insider transactions
SEI INVESTMENTS CO 13D/G history
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 |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 6.8% | $763,130,029 | 8,492,433 | BlackRock, Inc. | 30 Jun 2025 | |||
| LOOMIS SAYLES & CO L P | 7% | -0.86% | $807,709,415 | -$21,132,535 | 8,462,121 | -2.5% | Loomis, Sayles & Co., L.P. | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5% | $481,650,979 | 6,138,027 | Vanguard Portfolio Management | 31 Mar 2026 |
As of 30 Jun 2026, 419 institutional investors reported holding 49,124,354 shares of SEI Investments Co - Common Stock (SEIC). This represents 41% of the company’s total 120,200,577 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
55%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.3% | 9,927,545 | -1.8% | 0.01% | $870,744,969 |
| LOOMIS SAYLES & CO L P | 7.1% | 8,482,052 | -1.7% | 0.94% | $743,960,791 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.1% | 6,140,822 | +0.25% | 0.02% | $538,611,498 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9% | 4,686,241 | -1.2% | 0.01% | $411,030,198 |
| STATE STREET CORP | 3.5% | 4,251,584 | +1.6% | 0.01% | $372,906,433 |
| MORGAN STANLEY | 3.4% | 4,119,203 | -14% | 0.02% | $361,295,681 |
| Boston Partners | 2.6% | 3,093,791 | +75% | 0.24% | $271,416,767 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 2,953,161 | +4.3% | 0.01% | $259,058,027 |
| BANK OF AMERICA CORP /DE/ | 2.4% | 2,908,071 | -0.43% | 0.02% | $255,066,900 |
| FMR LLC | 2.1% | 2,510,218 | +20% | 0.01% | $220,171,260 |
| LORD, ABBETT & CO. LLC | 1.9% | 2,309,004 | +4.7% | 0.58% | $202,523,000 |
| DIMENSIONAL FUND ADVISORS LP | 1.6% | 1,962,762 | +4.8% | 0.03% | $172,145,570 |
| FIRST TRUST ADVISORS LP | 1.2% | 1,501,972 | -18% | 0.08% | $131,737,928 |
| Beutel, Goodman & Co Ltd. | 1.2% | 1,494,684 | -16% | 0.96% | $131,098,000 |
| Invesco Ltd. | 0.92% | 1,110,829 | -3% | 0.01% | $97,430,811 |
| ROYCE & ASSOCIATES LP | 0.87% | 1,050,287 | +5.4% | 0.74% | $92,120,673 |
| Caisse de depot et placement du Quebec | 0.83% | 1,002,445 | -16% | 0.13% | $87,924,451 |
| Boston Trust Walden Corp | 0.82% | 991,300 | -4.7% | 0.66% | $86,946,942 |
| NORTHERN TRUST CORP | 0.76% | 914,907 | +1% | 0.01% | $80,246,493 |
| Bank of New York Mellon Corp | 0.74% | 894,194 | -4.5% | 0.01% | $78,429,805 |
| NORGES BANK | 0.74% | 887,116 | 0.01% | $77,808,944 | |
| BARCLAYS PLC | 0.69% | 825,215 | +117% | 0.02% | $72,379,606 |
| AMERICAN CAPITAL MANAGEMENT INC | 0.62% | 745,323 | -3% | 2.9% | $65,372,280 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.58% | 695,446 | -0.15% | 0.01% | $60,997,569 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.55% | 660,498 | +16% | 0.03% | $57,932,280 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 49,124,354 | $4,309,309,280 | -$51,946,674 | $87.71 | 419 |
| 2026 Q1 | 89,978,545 | $7,060,379,524 | +$44,982,384 | $78.47 | 567 |
| 2025 Q4 | 89,065,117 | $7,308,153,337 | -$25,671,443 | $82.02 | 559 |
| 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 |