Sei Investments Co (SEIC) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

126,325,000Shares Outstanding

89,038,080Shares held by institutions

$7,402,625,971Value of institutional holdings

70.48%Institutional ownership %

-1.65%Shares Changed QoQ

546No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Sei Investments Co (NASDAQ:SEIC) is held by 546 institutional investors per 13F filings through December 2025.

These investors collectively held 70.0% of Sei Investments's outstanding shares in December 2025, down from 73.1% in September 2025.
They decreased total shares held in Sei Investments by -2.02% from the prior quarter, while the number of investors in SEIC increased 2.44% year over year.
Among the 546 funds, 271 bought more Sei Investments shares, 191 sold down, and 84 held their ground.
In total, institutional investors held 88.38Mn shares in Sei Investments as of December 2025, down by 1.83Mn shares quarter on quarter, and down 10.04Mn shares year over year.
VANGUARD GROUP INC leads ownership in SEIC with 11.07Mn shares as of December 31, 2025, equal to 8.76% of outstanding shares.
Leading buyers of Sei Investments shares for the quarter ending December 2025 were NORGES BANK (652.87K), Clark Capital Management Group, Inc. (619.32K), PFA Pension, Forsikringsaktieselskab (519.31K), Goldman Sachs Group Inc (398.07K), BlackRock, Inc. (375.24K).
Top sellers of SEIC stock for the quarter ending December 2025 included Bank Of America Corp /De/ (3.32Mn), Morgan Stanley (518.56K), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (429.62K), Royal Bank Of Canada (339.91K), Jpmorgan Chase & Co (328.8K).
Business Quant data shows the 10 biggest positions in Sei Investments as of December 2025 are held by VANGUARD GROUP INC (11.07Mn), BlackRock, Inc. (9.64Mn), LOOMIS SAYLES & CO L P (8.74Mn), Morgan Stanley (5.08Mn), State Street Corp (4.28Mn), Bank Of America Corp /De/ (2.92Mn), GEODE CAPITAL MANAGEMENT, LLC (2.89Mn), LORD, ABBETT & CO. LLC (1.92Mn), Beutel, Goodman & Co Ltd. (1.88Mn), DIMENSIONAL FUND ADVISORS LP (1.85Mn).

546 Institutional Holders

89,038,080 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	11,071,365	-189,226	-1.68%	$908,073,358.00
BlackRock, Inc.	31 Dec, 2025	9,637,840	375,238	4.05%	$790,495,640.00
LOOMIS SAYLES & CO L P	31 Dec, 2025	8,744,634	-231,415	-2.58%	$717,234,871.00
Morgan Stanley	31 Dec, 2025	5,075,178	-518,564	-9.27%	$416,266,280.00
State Street Corp	31 Dec, 2025	4,283,065	-253,517	-5.59%	$353,493,250.00
Bank Of America Corp /De/	31 Dec, 2025	2,922,323	-3,319,811	-53.18%	$239,688,911.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	2,894,317	109,974	3.95%	$237,420,996.00
LORD, ABBETT & CO. LLC	31 Dec, 2025	1,917,370	308,988	19.21%	$157,263.00
Beutel, Goodman & Co Ltd.	31 Dec, 2025	1,882,427	-140,523	-6.95%	$154,396.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	1,853,144	-9,908	-0.53%	$152,003,225.00
FIRST TRUST ADVISORS LP	31 Dec, 2025	1,800,938	75,919	4.40%	$147,712,960.00
Invesco Ltd.	31 Dec, 2025	1,732,384	861	0.05%	$142,090,136.00
CAISSE DE DEPOT ET PLACEMENT DU QUEBEC	31 Dec, 2025	1,380,997	37,240	2.77%	$113,269,374.00
FMR LLC	31 Dec, 2025	1,343,174	-6,456	-0.48%	$110,167,174.00
Boston Trust Walden Corp	31 Dec, 2025	1,084,790	-20,619	-1.87%	$88,974,448.00
Bank of New York Mellon Corp	31 Dec, 2025	990,651	-23,260	-2.29%	$81,253,190.00
ROYCE & ASSOCIATES LP	31 Dec, 2025	906,339	2,756	0.31%	$74,337,925.00
Northern Trust Corp	31 Dec, 2025	891,476	-31,144	-3.38%	$73,118,862.00
Ameriprise Financial Inc	31 Dec, 2025	821,461	5,767	0.71%	$67,377,717.00
Franklin Resources Inc	31 Dec, 2025	818,694	180,208	28.22%	$67,149,282.00

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