SEI Investments (SEIC) - Market capitalization

Market cap: £7.53 Billion

As of December 2025 SEI Investments has a market cap of £7.53 Billion. This makes SEI Investments the world's 1935th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of SEI Investments from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£7.53 B	-12.01%
2024	£8.56 B	30.46%
2023	£6.56 B	1.02%
2022	£6.49 B	3.95%
2021	£6.25 B	2.54%
2020	£6.09 B	-18.48%
2019	£7.47 B	33.72%
2018	£5.59 B	-33.22%
2017	£8.37 B	30.82%
2016	£6.40 B	10.55%
2015	£5.78 B	35.05%
2014	£4.28 B	20.3%
2013	£3.56 B	43.28%
2012	£2.48 B	24.61%
2011	£1.99 B	-30.43%
2010	£2.86 B	39.3%
2009	£2.05 B	0.8%
2008	£2.04 B	-35.11%
2007	£3.14 B	4.64%
2006	£3.00 B	42.25%
2005	£2.11 B	-5.22%
2004	£2.23 B	24.93%
2003	£1.78 B	-0.98%
2002	£1.80 B	-46.89%
2001	£3.39 B	-16.61%
2000	£4.07 B	212.21%
1999	£1.30 B	22.1%
1998	£1.06 B	134.99%
1997	£0.45 B	88.95%
1996	£0.24 B

End of Day market cap according to different sources

On Dec 4th, 2025 the market cap of SEI Investments was reported to be:

£7.46 Billion

by Nasdaq

£7.53 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Envestnet ENV	£2.62 B	-65.21%	🇺🇸 USA
Fidelity National Information Services FIS	£25.68 B	240.95%	🇺🇸 USA
Morningstar MORN	£6.86 B	-8.91%	🇺🇸 USA
BNY Mellon (Bank of New York Mellon) BK	£60.28 B	700.06%	🇺🇸 USA
Northern Trust NTRS	£19.05 B	152.85%	🇺🇸 USA
State Street Corporation STT	£25.93 B	244.21%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of SEI Investments (SEIC)

Market cap: £7.53 Billion