SEI Investments Co

SEIC

Exchange: Nasdaq
Industry: Security Brokers, Dealers & Flotation Companies
SEC CIK: 0000350894

SEC filings (opens in a new tab)

In the last 90 days, SEI Investments Co insiders filed 0 open-market purchases and 10 sales; 575 institutions reported holding it in 13F filings for Q2 2026, worth $7.94B in total; Markel Group is the only superinvestor holding it.

13F holders, Q1 2021

Institutional positions in SEI Investments Co as of Mar 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 443; No complete 13F data for Q4 2020
Shares held: 98.1M; No complete 13F data for Q4 2020
Total value: $5.97B; No complete 13F data for Q4 2020

Holders and value by quarter

Institutions reporting SEIC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2021: 443 institutions

Value heldQ1 2021: $5.97B

Institutions holding SEIC and their total value by quarter
Quarter	Holders	Value
Q2 2026	575	$7.94B
Q1 2026	569	$7.06B
Q4 2025	562	$7.31B
Q3 2025	550	$7.51B
Q2 2025	564	$8.09B
Q1 2025	546	$7.27B
Q4 2024	540	$7.52B
Q3 2024	502	$6.35B
Q2 2024	493	$6.02B
Q1 2024	475	$6.77B
Q4 2023	491	$5.90B
Q3 2023	462	$5.63B
Q2 2023	458	$5.53B
Q1 2023	444	$5.36B
Q4 2022	446	$5.45B
Q3 2022	433	$4.63B
Q2 2022	456	$5.18B
Q1 2022	465	$5.81B
Q4 2021	472	$5.94B
Q3 2021	446	$5.73B
Q2 2021	440	$6.04B
Q1 2021	443	$5.97B

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding SEI Investments Co.

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding SEIC in Q1 2021
Institution	Shares	Value	% of portfolio	Change in shares	Action
Illinois Municipal Retirement Fund	11,822	$720.0K	0.03%	–	–
Wellington Shields & Co., LLC	12,000	$731.0K	0.26%	–	–
HBK Sorce Advisory LLC	12,346	$752.0K	0.04%	–	–
Standard Life Aberdeen plc	12,359	$753.0K	0.00%	–	–
DekaBank Deutsche Girozentrale	12,255	$756.0K	0.00%	–	–
Xponance, Inc.	12,541	$764.0K	0.02%	–	–
Pacer Advisors, Inc.	12,701	$774.0K	0.01%	–	–
CIBC World Markets Corp	12,790	$779.0K	0.00%	–	–
Jane Street Group, LLC	12,787	$779.0K	0.00%	–	–
Zeke Capital Advisors, LLC	12,803	$780.0K	0.05%	–	–
Clearbridge Investments, LLC	12,862	$784.0K	0.00%	–	–
Magnetar Financial LLC	13,310	$811.0K	0.01%	–	–
DnB Asset Management AS	13,498	$822.4K	0.01%	–	–
Amalgamated Bank	14,120	$860.0K	0.03%	–	–
Hussman Strategic Advisors, Inc.	14,400	$877.0K	0.18%	–	–
CSat Investment Advisory, L.P.	14,392	$877.0K	0.74%	–	–
Nissay Asset Management Corp	14,468	$882.0K	0.01%	–	–
Susquehanna International Group, LLP	14,468	$882.0K	0.00%	–	–
AlphaCrest Capital Management LLC	14,470	$882.0K	0.05%	–	–
Cipher Capital LP	15,049	$917.0K	0.11%	–	–
Ossiam	15,169	$924.0K	0.03%	–	–
IFM Investors Pty Ltd	15,409	$939.0K	0.03%	–	–
Mackenzie Financial Corp	15,420	$940.0K	0.00%	–	–
Baird Financial Group, Inc.	15,531	$946.0K	0.00%	–	–
Tower Research Capital LLC (TRC)	15,757	$960.0K	0.02%	–	–
SG Americas Securities, LLC	16,466	$1.00M	0.01%	–	–
First Republic Investment Management, Inc.	16,606	$1.01M	0.00%	–	–
Macquarie Group Ltd	16,779	$1.02M	0.00%	–	–
Meristem Family Wealth, LLC	16,835	$1.03M	0.21%	–	–
Engineers Gate Manager LP	16,867	$1.03M	0.05%	–	–
Vident Investment Advisory, LLC	16,903	$1.03M	0.03%	–	–
Winton Group Ltd	17,158	$1.04M	0.06%	–	–
Lafayette Investments, Inc.	17,256	$1.05M	0.34%	–	–
Moody Aldrich Partners LLC	17,735	$1.08M	0.16%	–	–
Alphasimplex Group, LLC	17,750	$1.08M	0.45%	–	–
Teachers Retirement System of the State of Kentucky	18,005	$1.10M	0.01%	–	–
Stifel Financial Corp	18,482	$1.13M	0.00%	–	–
Public Employees Retirement Association of Colorado	18,701	$1.14M	0.01%	–	–
Grantham, Mayo, Van Otterloo & Co. LLC	18,817	$1.15M	0.01%	–	–
Quantitative Systematic Strategies LLC	18,907	$1.15M	0.18%	–	–
Skandinaviska Enskilda Banken AB (publ)	19,000	$1.16M	0.01%	–	–
Advisory Services Network, LLC	19,043	$1.16M	0.04%	–	–
Moors & Cabot, Inc.	19,396	$1.18M	0.09%	–	–
Unigestion Holding SA	19,509	$1.19M	0.04%	–	–
Northwestern Mutual Investment Management Company, LLC	19,870	$1.21M	0.02%	–	–
Tiedemann Advisors, LLC	20,057	$1.22M	0.05%	–	–
British Columbia Investment Management Corp	20,167	$1.23M	0.01%	–	–
Globeflex Capital L P	20,571	$1.25M	0.23%	–	–
Nomura Asset Management Co Ltd	20,800	$1.27M	0.01%	–	–
Davenport & Co LLC	20,959	$1.28M	0.01%	–	–
Arnhold LLC	21,045	$1.28M	0.15%	–	–
Bank of Nova Scotia	21,200	$1.29M	0.00%	–	–
New Mexico Educational Retirement Board	21,300	$1.30M	0.05%	–	–
Canada Pension Plan Investment Board	21,410	$1.30M	0.00%	–	–
Utah Retirement Systems	21,674	$1.32M	0.02%	–	–
Panagora Asset Management Inc	22,228	$1.35M	0.01%	–	–
Metropolitan Life Insurance Co	22,396	$1.36M	0.02%	–	–
Oliver Luxxe Assets LLC	22,570	$1.38M	0.41%	–	–
Federated Hermes, Inc.	22,742	$1.39M	0.00%	–	–
Gulf International Bank (UK) Ltd	23,880	$1.46M	0.02%	–	–
Bank of Montreal	23,690	$1.49M	0.00%	–	–
Balyasny Asset Management LLC	24,691	$1.50M	0.01%	–	–
Morris Capital Advisors, LLC	25,801	$1.57M	1.28%	–	–
The PNC Financial Services Group, Inc.	26,312	$1.60M	0.00%	–	–
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.	26,307	$1.60M	0.01%	–	–
Bright Rock Capital Management, LLC	27,600	$1.68M	0.43%	–	–
NN Investment Partners Holdings N.V.	27,697	$1.69M	0.01%	–	–
Westwood Holdings Group Inc.	27,837	$1.70M	0.02%	–	–
Raymond James Financial Services Advisors, Inc.	28,387	$1.73M	0.00%	–	–
Korea Investment CORP	29,000	$1.77M	0.01%	–	–
Qube Research & Technologies Ltd	29,410	$1.79M	0.03%	–	–
Natixis	29,528	$1.80M	0.01%	–	–
Henshaw Capital LLC	30,377	$1.85M	0.12%	–	–
Johnson Investment Counsel Inc	30,771	$1.88M	0.03%	–	–
Louisiana State Employees Retirement System	31,000	$1.89M	0.05%	–	–
Pensionfund Sabic	32,000	$1.95M	0.45%	–	–
Atria Investments LLC	33,708	$2.05M	0.05%	–	–
Boston Financial Mangement LLC	35,030	$2.13M	0.09%	–	–
NJ State Employees Deferred Compensation Plan	35,400	$2.16M	0.31%	–	–
Arizona State Retirement System	35,431	$2.16M	0.02%	–	–
Zurcher Kantonalbank (Zurich Cantonalbank)	35,739	$2.18M	0.01%	–	–
Two Sigma Investments, LP	36,294	$2.21M	0.01%	–	–
APG Asset Management N.V.	43,353	$2.25M	0.00%	–	–
Wealth Alliance Advisory Group, LLC	37,504	$2.29M	1.17%	–	–
Aviva PLC	37,601	$2.29M	0.01%	–	–
Taylor Hoffman Wealth Management	37,638	$2.29M	1.05%	–	–
Toronto Dominion Bank	38,058	$2.32M	0.00%	–	–
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	38,443	$2.34M	0.01%	–	–
Forsta Ap-Fonden	38,500	$2.35M	0.03%	–	–
Handelsbanken Fonder AB	38,673	$2.36M	0.01%	–	–
Duality Advisers, LP	38,884	$2.37M	0.21%	–	–
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	39,739	$2.42M	0.03%	–	–
Treasurer of the State of North Carolina	41,339	$2.52M	0.02%	–	–
Russell Investments Group, Ltd.	42,203	$2.57M	0.00%	–	–
Oppenheimer Asset Management Inc.	43,829	$2.67M	0.04%	–	–
State of Alaska, Department of Revenue	44,082	$2.69M	0.03%	–	–
Ameritas Investment Partners, Inc.	44,859	$2.69M	0.10%	–	–
West Coast Financial LLC	44,356	$2.70M	0.47%	–	–
Royal London Asset Management Ltd	44,725	$2.73M	0.01%	–	–
South Dakota Investment Council	45,761	$2.79M	0.05%	–	–