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SEIC Institutional Ownership & 13F Holders | SmartMoneyDB

SEICSEI INVTS CO

COM · CUSIP 784117103

Smart Money Ownership

Of the 13 tracked institutions holding SEIC, 8 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +4.0pt. It's a gauge of who owns the name, not just how many.

SEIC (SEI INVTS CO) Institutional Ownership Summary

Among the 13 tracked institutional investors we monitor, SEIC (SEI INVTS CO) is held with a combined value of $2.31B across 28,960,899 shares. The largest holder is VANGUARD GROUP INC with a position worth $908.07M (0.01% of their portfolio). 4 funds increased their holdings. 7 funds reduced their position.

Total Institutional Value

$2.31B

Total Shares Held

28,960,899

Institutional Holders

% of Shares Outstanding

24.1%

of 120.27M shares · SEC 2026-04-10

Days to Cover

3.5-5.2%

2.39M shares short · FINRA 2026-07-15

Tracked 13F institutions hold 24.1% of SEIC's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-10), not a live float.

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

FMR LLC+56% shares~$58.8M BlackRock, Inc.+5% shares~$37.1M PRICE T ROWE ASSOCIATES INC /MD/+14% shares~$857.7K RENAISSANCE TECHNOLOGIES LLC+1% shares~$218.1K

Biggest Sellers

13F Institutional Holders

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AQR CAPITAL MANAGEMENT LLC

0.02% of book-7.0%

$32.96M

RENAISSANCE TECHNOLOGIES LLC

0.05% of book+0.7%

$31.37M

Bridgewater Associates, LP

MILLENNIUM MANAGEMENT LLC

0.00% of book-68.0%

$9.32M

PRICE T ROWE ASSOCIATES INC /MD/

0.00% of book+13.5%

$7.21M

#	Fund	Value↓	Shares	Portfolio %	Change
1	VANGUARD GROUP INC	$908.07M	11,071,365	0.01%	-1.7%
2	BlackRock, Inc.	$793.36M	10,110,337	0.01%	+4.9%
3	STATE STREET CORP	$328.41M	4,185,178	0.01%	-2.3%
4	FMR LLC	$164.20M	2,092,499	0.01%	+55.8%
5	AQR CAPITAL MANAGEMENT LLC	$32.96M	420,042	0.02%	-7.0%
6	RENAISSANCE TECHNOLOGIES LLC	$31.37M	399,826	0.05%	+0.7%
7	Bridgewater Associates, LP	$18.26M	232,675	0.08%	-32.7%
8	MARKEL GROUP INC.	$13.59M	173,200	0.11%	-
9	MILLENNIUM MANAGEMENT LLC	$9.32M	118,765	0.00%	-68.0%
10	PRICE T ROWE ASSOCIATES INC /MD/	$7.21M	91,883	0.00%	+13.5%

Frequently Asked Questions

Which institutional investors own the most SEIC stock?

As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of SEIC with a position worth $908.07M, representing 0.01% of their portfolio. In total, 13 institutional investors hold SEIC with a combined value of $2.31B.

What percentage of SEIC is owned by institutional investors?

Institutional investors hold $2.31B worth of SEIC stock across 13 positions. The largest institutional holder is VANGUARD GROUP INC with $908.07M in holdings.

What is a 13F filing and why does it matter for SEIC?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For SEIC, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track SEIC institutional moves

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