SEIC · Sei Investments Co · Shareholders & Ownership
Every disclosed holder of SEIC in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns SEIC
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 90,404,011 | 75.32% |
| Insiders (Forms 3, 4, 5) | 9,520,886 | 7.93% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 20,094,285 | 16.74% |
| Registered funds (N-PORT, not summed) | 45,099,113 | 37.58% |
Shares outstanding: 120,019,182, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of SEIC
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
9,927,545 | ||
| 1.1 |
iShares Core S&P Mid-Cap ETF
Fund
S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
3,128,188 | ||
| 1.2 |
iShares Russell Mid-Cap ETF
Fund
S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
417,672 | ||
| 1.3 |
iShares S&P Mid-Cap 400 Growth ETF
Fund
S000004308 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
323,304 | ||
| 1.4 |
iShares Russell 1000 Value ETF
Fund
S000004345 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
227,631 | ||
| 1.5 |
iShares S&P Mid-Cap 400 Value ETF
Fund
S000004309 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
187,783 | ||
| 2 |
LOOMIS SAYLES & CO L P
13F
CIK 312348 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
8,482,052 | ||
| 2.1 |
LOOMIS SAYLES & CO L P
13G
CIK 312348 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(d), exempt investor, not summed
|
8,462,120 | ||
| 2.2 |
Loomis Sayles Growth Fund
Fund
S000006699 · Registered fund · Jun 30, 2026
LOOMIS SAYLES FUNDS II, not summed
|
2,138,725 | ||
| 2.3 |
Loomis Sayles Global Growth Fund
Fund
S000053353 · Registered fund · May 31, 2026
Natixis Funds Trust II, not summed
|
10,618 | ||
| 3 |
|
6,784,574 | ||
| 4 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,140,822 | ||
| 5 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,686,241 | ||
| 6 |
|
4,251,584 | ||
| 6.1 |
State Street(R) SPDR(R) S&P(R) Dividend ETF
Fund
S000006981 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
901,579 | ||
| 6.2 |
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund
S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
462,683 | ||
| 6.3 |
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Growth ETF
Fund
S000006987 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
83,428 | ||
| 6.4 |
State Street(R) SPDR(R) S&P(R) Capital Markets ETF
Fund
S000006978 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
75,629 | ||
| 6.5 |
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Value ETF
Fund
S000006988 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
57,432 | ||
| 7 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,119,203 | ||
| 7.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
41 | ||
| 8 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
3,435,336 | ||
| 9 |
Boston Partners
13F
CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,093,791 | ||
| 10 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,953,161 | ||
| 11 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,908,071 | ||
| 12 |
Eaton Vance Atlanta Capital SMID-Cap Fund
Fund
S000005198 · Registered fund · Jun 30, 2026
Eaton Vance Growth Trust, not summed
|
2,713,727 | ||
| 13 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,510,218 | ||
| 13.1 |
Fidelity Low-Priced Stock Fund
Fund
S000007152 · Registered fund · Jul 31, 2026
Fidelity Puritan Trust, not summed
|
892,010 | ||
| 13.2 |
Strategic Advisers Fidelity U.S. Total Stock Fund
Fund
S000061481 · Registered fund · May 31, 2026
Fidelity Rutland Square Trust II, not summed
|
531,064 | ||
| 13.3 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
477,972 | ||
| 13.4 |
Strategic Advisers U.S. Total Stock Fund
Fund
S000084926 · Registered fund · May 31, 2026
Fidelity Rutland Square Trust II, not summed
|
473,518 | ||
| 13.5 |
Fidelity Mid Cap Index Fund
Fund
S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
385,372 | ||
| 14 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
2,483,119 | ||
| 15 |
LORD, ABBETT & CO. LLC
13F
CIK 728100 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,309,004 | ||
| 15.1 |
LORD ABBETT AFFILIATED FUND INC
Fund
S000006806 · Registered fund · Jul 31, 2026
LORD ABBETT AFFILIATED FUND INC, not summed
|
1,036,912 | ||
| 15.2 |
Lord Abbett Fundamental Equity Fund
Fund
S000007138 · Registered fund · Jul 31, 2026
LORD ABBETT SECURITIES TRUST, not summed
|
471,006 | ||
| 15.3 |
Lord Abbett Value Opportunities Fund
Fund
S000007144 · Registered fund · Jul 31, 2026
LORD ABBETT SECURITIES TRUST, not summed
|
308,978 | ||
| 15.4 |
LORD ABBETT MID CAP STOCK FUND INC
Fund
S000001450 · Registered fund · Jun 30, 2026
LORD ABBETT MID CAP STOCK FUND INC, not summed
|
287,980 | ||
| 15.5 |
Growth and Income Portfolio
Fund
S000007300 · Registered fund · Jun 30, 2026
LORD ABBETT SERIES FUND INC, not summed
|
107,371 | ||
| 16 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,962,762 | ||
| 16.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
331,411 | ||
| 16.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
274,160 | ||
| 16.3 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
213,389 | ||
| 16.4 |
U.S. CORE EQUITY 1 PORTFOLIO
Fund
S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
206,798 | ||
| 16.5 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
185,624 | ||
| 17 |
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund
S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,572,568 | ||
| 18 |
|
1,560,293 | ||
| 19 |
FIRST TRUST ADVISORS LP
13F
CIK 1125816 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,501,972 | ||
| 19.1 |
First Trust Value Line Dividend Index Fund
Fund
S000013817 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund, not summed
|
346,293 | ||
| 19.2 |
First Trust Financials AlphaDEX Fund
Fund
S000017699 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
154,436 | ||
| 19.3 |
FT Vest SMID Rising Dividend Achievers Target Income ETF
Fund
S000081275 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded Fund IV, not summed
|
65,008 | ||
| 19.4 |
First Trust/Dow Jones Dividend & Income Allocation Portfolio
Fund
S000036417 · Registered fund · Jun 30, 2026
First Trust Variable Insurance Trust, not summed
|
31,075 | ||
| 19.5 |
First Trust Nasdaq BuyWrite Income ETF
Fund
S000040305 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund VI, not summed
|
24,374 | ||
| 20 |
Beutel, Goodman & Co Ltd.
13F
CIK 1361974 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,494,684 | ||
| 21 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,110,829 | ||
| 21.1 |
Invesco S&P MidCap Quality ETF
Fund
S000013108 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
790,021 | ||
| 21.2 |
Invesco Russell 1000 Dynamic Multifactor ETF
Fund
S000064607 · Registered fund · May 31, 2026
Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
|
140,902 | ||
| 21.3 |
Invesco S&P MidCap Low Volatility ETF
Fund
S000030966 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
92,812 | ||
| 21.4 |
Invesco RAFI US 1000 ETF
Fund
S000011995 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
25,042 | ||
| 21.5 |
Invesco S&P MidCap 400 Revenue ETF
Fund
S000064595 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
13,568 | ||
| 22 |
ROYCE & ASSOCIATES LP
13F
CIK 906304 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,050,287 | ||
| 22.1 |
Royce Premier Fund
Fund
S000009505 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
361,661 | ||
| 22.2 |
Royce Small-Cap Fund
Fund
S000009507 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
274,408 | ||
| 22.3 |
Royce SMid-Cap Total Return Fund
Fund
S000009522 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
8,017 | ||
| 23 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,047,858 | ||
| 24 |
Caisse de depot et placement du Quebec
13F
CIK 898286 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,002,445 | ||
| 25 |
Boston Trust Walden Corp
13F
CIK 1534866 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
991,300 | ||
| 26 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
914,907 | ||
| 26.1 |
Mid Cap Index Fund
Fund
S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
59,404 | ||
| 26.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
3,753 | ||
| 27 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
894,194 | ||
| 27.1 |
BNY Mellon US Mid Cap Core Equity ETF
Fund
S000067261 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
|
16,003 | ||
| 28 |
NORGES BANK
13F
CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
887,116 | ||
| 29 |
|
825,215 | ||
| 30 |
First Trust SMID Cap Rising Dividend Achievers ETF
Fund
S000059604 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund VI, not summed
|
824,763 | ||
| 31 |
AMERICAN CAPITAL MANAGEMENT INC
13F
CIK 1320168 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
745,323 | ||
| 32 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
695,446 | ||
| 32.1 |
Schwab U.S. Mid-Cap ETF
Fund
S000026635 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
251,059 | ||
| 32.2 |
Schwab U.S. Large-Cap ETF
Fund
S000026632 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
100,085 | ||
| 32.3 |
Schwab Fundamental U.S. Large Company ETF
Fund
S000040877 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
68,176 | ||
| 32.4 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
54,833 | ||
| 32.5 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
54,638 | ||
| 33 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
660,498 | ||
| 34 |
Clark Capital Management Group, Inc.
13F
CIK 1352187 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
638,934 | ||
| 35 |
|
618,802 | ||
| 36 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
592,612 | ||
| 37 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
583,800 | ||
| 38 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
578,801 | ||
| 39 |
AMERIPRISE FINANCIAL INC
13F
CIK 820027 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
578,420 | ||
| 39.1 |
Multi-Manager Large Cap Growth Strategies Fund
Fund
S000091548 · Registered fund · Jun 30, 2026
COLUMBIA FUNDS SERIES TRUST I, not summed
|
187,644 | ||
| 39.2 |
Columbia Mid Cap Index Fund
Fund
S000010826 · Registered fund · May 31, 2026
COLUMBIA FUNDS SERIES TRUST, not summed
|
66,352 | ||
| 39.3 |
Columbia Research Enhanced Core ETF
Fund
S000066076 · Registered fund · Jul 31, 2026
Columbia ETF Trust I, not summed
|
31,478 | ||
| 39.4 |
Columbia Integrated Large Cap Growth Fund
Fund
S000074120 · Registered fund · Feb 28, 2026
Columbia Funds Series Trust II, not summed
|
21,422 | ||
| 39.5 |
Columbia Integrated Large Cap Growth Fund II
Fund
S000036204 · Registered fund · Jun 30, 2026
COLUMBIA FUNDS SERIES TRUST I, not summed
|
9,176 | ||
| 40 |
First Financial Bankshares Inc
13F
CIK 36029 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
552,780 | ||
| 41 |
Quantinno Capital Management LP
13F
CIK 1759654 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
532,381 | ||
| 42 |
VOLORIDGE INVESTMENT MANAGEMENT, LLC
13F
CIK 1556921 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
518,314 | ||
| 43 |
VANGUARD DIVIDEND APPRECIATION INDEX FUND
Fund
S000011322 · Registered fund · Jul 31, 2026
VANGUARD SPECIALIZED FUNDS, not summed
|
517,183 | ||
| 44 |
FRANKLIN RESOURCES INC
13F
CIK 38777 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
512,826 | ||
| 44.1 |
Franklin Global Allocation Fund
Fund
S000007241 · Registered fund · Jun 30, 2026
Franklin Fund Allocator Series, not summed
|
94,673 | ||
| 44.2 |
Franklin U.S. Mid Cap Multifactor Index ETF
Fund
S000057201 · Registered fund · Jun 30, 2026
Franklin Templeton ETF Trust, not summed
|
66,780 | ||
| 44.3 |
Franklin U.S. Core Equity (IU) Fund
Fund
S000066093 · Registered fund · Jul 31, 2026
Franklin Fund Allocator Series, not summed
|
31,257 | ||
| 44.4 |
Franklin U.S. Large Cap Multifactor Index ETF
Fund
S000057200 · Registered fund · Jun 30, 2026
Franklin Templeton ETF Trust, not summed
|
23,188 | ||
| 45 |
ENVESTNET ASSET MANAGEMENT INC
13F
CIK 1407543 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
478,365 | ||
| 46 |
NATIXIS ADVISORS, LLC
13F
CIK 1018331 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
461,891 | ||
| 46.1 |
Natixis U.S. Equity Opportunities Fund
Fund
S000006658 · Registered fund · Jun 30, 2026
Natixis Funds Trust I, not summed
|
71,863 | ||
| 47 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
461,227 | ||
| 47.1 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Aug 31, 2026
GOLDMAN SACHS TRUST, not summed
|
5,126 | ||
| 47.2 |
Goldman Sachs MarketBeta U.S. 1000 Equity ETF
Fund
S000075322 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust II, not summed
|
3,156 | ||
| 47.3 |
Goldman Sachs MarketBeta(R) Russell 1000 Value Equity ETF
Fund
S000083006 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
1,246 | ||
| 48 |
Azora Capital LP
13F
CIK 1700272 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
443,189 | ||
| 49 |
Connor, Clark & Lunn Investment Management Ltd.
13F
CIK 1596800 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
421,046 | ||
| 50 |
VANGUARD HIGH DIVIDEND YIELD INDEX FUND
Fund
S000014011 · Registered fund · Jul 31, 2026
VANGUARD WHITEHALL FUNDS, not summed
|
409,254 |
93 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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