As of October 29, 2026, SEI Investments had a market cap of $12.46 billion, which increased by 1.55% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.
Data updated: Oct 29, 2026, 4:00 PM ET
SEI Investments Co. (SEIC)
🌍 United States📈 NASDAQ🏭 Financial Services🏢 Capital Markets
Note: Each point on the chart represents the market capitalization at the end of the trading day. Source: Data compiled from
EDGAR filings,
Bloomberg
and Yahoo Finance.
📈 SEI Investments Market Cap History by Year and Month
SEI Investments Market Cap History by Year and Month
Year / Month
Market Cap
% Change
2026
$12.46B
▲ 24.10%
$12.46B
▲ 1.14%
$12.32B
▼ 7.51%
$13.32B
▲ 7.77%
$12.36B
▲ 17.05%
$10.56B
▼ 0.09%
$10.57B
▼ 3.12%
$10.91B
▲ 13.73%
$9.593B
▼ 3.50%
$9.941B
▼ 7.44%
$10.74B
▲ 6.97%
2025
$10.04B
▼ 4.03%
$10.04B
▲ 1.41%
$9.9B
▲ 0.30%
$9.87B
▼ 5.91%
$10.49B
▼ 3.85%
$10.91B
▲ 0.18%
$10.89B
▼ 2.03%
$11.116B
▲ 4.73%
$10.614B
▲ 8.91%
$9.746B
▲ 0.61%
$9.687B
▼ 4.67%
$10.162B
▼ 7.54%
$10.991B
▲ 5.06%
2024
$10.462B
▲ 25.10%
$10.462B
▼ 1.78%
$10.652B
▲ 10.53%
$9.637B
▲ 8.17%
$8.909B
▲ 1.42%
$8.784B
▼ 0.32%
$8.812B
▲ 3.67%
$8.5B
▼ 4.45%
$8.896B
▲ 2.67%
$8.665B
▼ 8.37%
$9.456B
▲ 7.05%
$8.833B
▲ 6.33%
$8.307B
▼ 0.67%
2023
$8.363B
▲ 6.39%
$8.363B
▲ 8.33%
$7.72B
▲ 9.33%
$7.061B
▼ 11.43%
$7.972B
▼ 2.95%
$8.214B
▼ 1.48%
$8.337B
▲ 5.75%
$7.884B
▲ 4.52%
$7.543B
▼ 3.95%
$7.853B
▲ 2.39%
$7.67B
▼ 5.18%
$8.089B
▼ 3.50%
$8.382B
▲ 6.63%
2022
$7.861B
▼ 6.83%
$7.861B
▼ 6.38%
$8.397B
▲ 14.70%
$7.321B
▲ 10.71%
$6.613B
▼ 10.77%
$7.411B
▼ 1.20%
$7.501B
▲ 2.49%
$7.319B
▼ 8.75%
$8.021B
▲ 4.86%
$7.649B
▼ 7.42%
$8.262B
▲ 1.94%
$8.105B
▼ 0.05%
$8.109B
▼ 3.89%
2021
$8.437B
▲ 2.38%
$8.437B
▲ 1.47%
$8.315B
▼ 5.41%
$8.791B
▲ 6.43%
$8.26B
▼ 6.78%
$8.861B
▲ 3.30%
$8.578B
▼ 1.85%
$8.74B
▼ 3.53%
$9.06B
▲ 3.26%
$8.774B
▲ 0.91%
$8.695B
▲ 8.19%
$8.037B
▲ 5.96%
$7.585B
▼ 7.96%
2020
$8.241B
▼ 15.95%
$8.241B
▲ 8.06%
$7.626B
▲ 7.32%
$7.106B
▼ 3.04%
$7.329B
▼ 4.46%
$7.671B
▲ 0.07%
$7.666B
▼ 4.78%
$8.051B
▲ 0.37%
$8.021B
▲ 6.39%
$7.539B
▲ 9.99%
$6.854B
▼ 16.47%
$8.205B
▼ 16.17%
$9.788B
▼ 0.17%
2019
$9.805B
▲ 38.14%
$9.805B
▲ 1.12%
$9.696B
▲ 7.69%
$9.004B
▲ 1.16%
$8.901B
▲ 2.49%
$8.685B
▼ 3.49%
$8.999B
▲ 5.18%
$8.556B
▲ 11.64%
$7.664B
▼ 7.72%
$8.305B
▲ 4.29%
$7.963B
▼ 1.78%
$8.107B
▲ 10.96%
$7.306B
▲ 2.93%
2018
$7.098B
▼ 37.27%
$7.098B
▼ 15.01%
$8.352B
▲ 0.46%
$8.314B
▼ 13.23%
$9.582B
▼ 3.14%
$9.893B
▲ 5.24%
$9.4B
▼ 4.89%
$9.883B
▼ 1.97%
$10.082B
▲ 0.87%
$9.995B
▼ 15.55%
$11.835B
▲ 3.32%
$11.455B
▼ 3.09%
$11.82B
▲ 4.45%
2017
$11.316B
▲ 43.28%
$11.316B
▲ 2.13%
$11.08B
▲ 9.08%
$10.158B
▲ 5.22%
$9.654B
▲ 4.45%
$9.243B
▲ 3.45%
$8.935B
▲ 5.15%
$8.497B
▲ 6.88%
$7.95B
▼ 1.22%
$8.048B
▲ 0.55%
$8.004B
▼ 0.14%
$8.015B
▲ 3.79%
$7.722B
▼ 2.23%
2016
$7.898B
▼ 7.94%
$7.898B
▲ 4.62%
$7.549B
▲ 6.43%
$7.093B
▼ 2.77%
$7.295B
▼ 1.91%
$7.437B
▲ 2.44%
$7.26B
▼ 6.38%
$7.755B
▼ 6.94%
$8.333B
▲ 7.00%
$7.788B
▲ 11.74%
$6.97B
▲ 11.57%
$6.247B
▼ 2.73%
$6.422B
▼ 25.14%
2015
$8.579B
▲ 28.54%
$8.579B
▼ 4.20%
$8.955B
▲ 4.96%
$8.532B
▲ 7.47%
$7.939B
▼ 5.39%
$8.391B
▼ 5.12%
$8.844B
▲ 8.76%
$8.132B
▲ 2.32%
$7.948B
▲ 4.77%
$7.586B
▲ 3.61%
$7.322B
▲ 1.98%
$7.18B
▲ 7.13%
$6.702B
▲ 0.42%
2014
$6.674B
▲ 13.54%
$6.674B
▲ 0.69%
$6.628B
▲ 2.52%
$6.465B
▲ 6.98%
$6.043B
▼ 4.95%
$6.358B
▲ 5.79%
$6.01B
▲ 9.37%
$5.495B
▼ 1.35%
$5.57B
▲ 1.70%
$5.477B
▼ 3.61%
$5.682B
▼ 0.14%
$5.69B
▼ 1.44%
$5.773B
▼ 1.79%
2013
$5.878B
▲ 46.22%
$5.878B
▲ 2.60%
$5.729B
▲ 1.17%
$5.663B
▲ 7.46%
$5.27B
▲ 3.09%
$5.112B
▼ 5.86%
$5.43B
▲ 10.79%
$4.901B
▼ 7.13%
$5.277B
▲ 6.80%
$4.941B
▼ 0.66%
$4.974B
▲ 1.91%
$4.881B
▲ 4.88%
$4.654B
▲ 15.77%
2012
$4.02B
▲ 29.59%
$4.02B
▲ 5.62%
$3.806B
▲ 0.74%
$3.778B
▲ 1.53%
$3.721B
▼ 1.43%
$3.775B
▲ 2.69%
$3.676B
▲ 5.30%
$3.491B
▲ 11.04%
$3.144B
▼ 11.34%
$3.546B
▼ 2.45%
$3.635B
▲ 4.21%
$3.488B
▲ 7.52%
$3.244B
▲ 4.58%
2011
$3.102B
▼ 29.95%
$3.102B
▲ 3.26%
$3.004B
▲ 3.80%
$2.894B
▲ 4.78%
$2.762B
▼ 11.59%
$3.124B
▼ 13.77%
$3.623B
▼ 12.13%
$4.123B
▼ 5.82%
$4.378B
▲ 5.90%
$4.134B
▼ 6.45%
$4.419B
▲ 3.20%
$4.282B
▼ 0.60%
$4.308B
▼ 2.71%
2010
$4.428B
▲ 32.89%
$4.428B
▲ 4.85%
$4.223B
▲ 1.96%
$4.142B
▲ 9.00%
$3.8B
▲ 13.91%
$3.336B
▼ 7.72%
$3.615B
▼ 5.88%
$3.841B
▼ 4.07%
$4.004B
▼ 6.10%
$4.264B
▲ 2.35%
$4.166B
▲ 24.62%
$3.343B
▼ 0.77%
$3.369B
▲ 1.11%
2009
$3.332B
▲ 11.29%
$3.332B
▼ 0.09%
$3.335B
▲ 0.21%
$3.328B
▼ 11.25%
$3.75B
▲ 6.44%
$3.523B
▼ 2.44%
$3.611B
▲ 4.82%
$3.445B
▲ 16.98%
$2.945B
▲ 9.97%
$2.678B
▲ 14.69%
$2.335B
▲ 3.14%
$2.264B
▼ 6.25%
$2.415B
▼ 19.34%
2008
$2.994B
▼ 52.13%
$2.994B
▲ 1.59%
$2.947B
▼ 12.99%
$3.387B
▼ 20.34%
$4.252B
▼ 6.01%
$4.524B
▲ 2.56%
$4.411B
▼ 2.11%
$4.506B
▼ 3.16%
$4.653B
▲ 3.75%
$4.485B
▼ 5.76%
$4.759B
▼ 2.14%
$4.863B
▼ 9.71%
$5.386B
▼ 13.89%
2007
$6.255B
▲ 6.20%
$6.255B
▲ 3.75%
$6.029B
▼ 1.89%
$6.145B
▲ 15.03%
$5.342B
▲ 7.53%
$4.968B
▼ 6.93%
$5.338B
▼ 7.28%
$5.757B
▼ 5.84%
$6.114B
▲ 1.07%
$6.049B
▲ 1.39%
$5.966B
▼ 0.37%
$5.988B
▼ 2.93%
$6.169B
▲ 4.74%
2006
$5.89B
▲ 60.40%
$5.89B
▲ 2.35%
$5.755B
▲ 3.40%
$5.566B
▲ 0.58%
$5.534B
▲ 10.09%
$5.027B
▲ 4.47%
$4.812B
▲ 0.12%
$4.806B
▲ 7.52%
$4.47B
▲ 5.97%
$4.218B
▲ 5.93%
$3.982B
▼ 3.35%
$4.12B
▲ 1.33%
$4.066B
▲ 10.73%
2005
$3.672B
▼ 14.29%
$3.672B
▼ 9.42%
$4.054B
▲ 5.30%
$3.85B
▲ 3.36%
$3.725B
▲ 2.82%
$3.623B
▼ 6.48%
$3.874B
▲ 3.56%
$3.741B
▲ 6.49%
$3.513B
▲ 5.94%
$3.316B
▼ 9.25%
$3.654B
▼ 2.92%
$3.764B
▼ 1.39%
$3.817B
▼ 10.90%
2004
$4.284B
▲ 34.08%
$4.284B
▲ 6.86%
$4.009B
▲ 8.67%
$3.689B
▲ 6.80%
$3.454B
▲ 2.52%
$3.369B
▲ 6.72%
$3.157B
▲ 5.62%
$2.989B
▼ 2.10%
$3.053B
▼ 0.10%
$3.056B
▼ 11.09%
$3.437B
▼ 8.30%
$3.748B
▲ 5.46%
$3.554B
▲ 11.24%
2003
$3.195B
▲ 10.71%
$3.195B
▲ 7.50%
$2.972B
▼ 3.13%
$3.068B
▼ 10.55%
$3.43B
▼ 6.23%
$3.658B
▼ 0.25%
$3.667B
▲ 9.33%
$3.354B
▲ 10.18%
$3.044B
▲ 10.41%
$2.757B
▲ 0.22%
$2.751B
▲ 3.38%
$2.661B
▼ 1.74%
$2.708B
▼ 6.17%
2002
$2.886B
▼ 41.40%
$2.886B
▼ 14.59%
$3.379B
▲ 19.40%
$2.83B
▲ 10.94%
$2.551B
▼ 18.65%
$3.136B
▲ 10.23%
$2.845B
▼ 7.96%
$3.091B
▼ 14.64%
$3.621B
▼ 2.03%
$3.696B
▼ 21.11%
$4.685B
▲ 7.83%
$4.345B
▼ 1.45%
$4.409B
▼ 10.48%
2001
$4.925B
▼ 17.55%
$4.925B
▲ 12.57%
$4.375B
▲ 31.70%
$3.322B
▼ 4.70%
$3.486B
▼ 22.03%
$4.471B
▼ 14.37%
$5.221B
▲ 1.50%
$5.144B
▲ 16.27%
$4.424B
▲ 1.63%
$4.353B
▲ 28.48%
$3.388B
▼ 27.00%
$4.641B
▲ 3.48%
$4.485B
▼ 24.91%
2000
$5.973B
▲ 183.48%
$5.973B
▲ 25.75%
$4.75B
▼ 1.86%
$4.84B
▲ 28.62%
$3.763B
▲ 11.43%
$3.377B
▲ 15.97%
$2.912B
▲ 37.49%
$2.118B
▼ 14.46%
$2.476B
▲ 17.40%
$2.109B
▲ 5.24%
$2.004B
▲ 27.24%
$1.575B
▼ 14.68%
$1.846B
▼ 12.39%
1999
$2.107B
▲ 18.57%
$2.107B
▲ 17.06%
$1.8B
▲ 4.05%
$1.73B
▲ 9.22%
$1.584B
▼ 2.70%
$1.628B
▼ 4.96%
$1.713B
▲ 9.60%
$1.563B
▼ 13.50%
$1.807B
▲ 7.37%
$1.683B
▲ 2.68%
$1.639B
▼ 7.40%
$1.77B
▼ 13.99%
$2.058B
▲ 15.81%
1998
$1.777B
▲ 137.88%
$1.777B
▲ 7.83%
$1.648B
▲ 11.35%
$1.48B
▲ 19.26%
$1.241B
▲ 12.00%
$1.108B
▼ 16.94%
$1.334B
▲ 20.94%
$1.103B
▼ 7.70%
$1.195B
▼ 9.67%
$1.323B
▲ 8.27%
$1.222B
▲ 16.49%
$1.049B
▲ 22.83%
$0.854B
▲ 14.32%
1997
$0.747B
▲ 81.31%
$0.747B
▼ 0.66%
$0.752B
▼ 2.59%
$0.772B
▲ 29.10%
$0.598B
▲ 12.20%
$0.533B
▼ 0.37%
$0.535B
▲ 20.77%
$0.443B
▲ 6.24%
$0.417B
▲ 6.92%
$0.39B
— 0.00%
$0.39B
▼ 5.11%
$0.411B
▲ 11.08%
$0.37B
▼ 10.19%
1996
$0.412B
▲ 3.00%
$0.412B
▲ 0.24%
$0.411B
▲ 10.48%
$0.372B
▼ 12.88%
$0.427B
▲ 6.75%
$0.4B
▲ 6.67%
$0.375B
▼ 5.06%
$0.395B
▼ 2.71%
$0.406B
▼ 7.94%
$0.441B
▲ 5.76%
$0.417B
▼ 1.18%
$0.422B
▲ 1.69%
$0.415B
▲ 3.75%
1995
$0.4B
▲ 23.46%
$0.4B
▲ 1.01%
$0.396B
▲ 1.28%
$0.391B
▲ 1.03%
$0.387B
▼ 7.19%
$0.417B
▲ 2.21%
$0.408B
▼ 3.77%
$0.424B
▲ 16.80%
$0.363B
▲ 2.83%
$0.353B
▼ 1.40%
$0.358B
▲ 0.28%
$0.357B
▲ 8.51%
$0.329B
▲ 1.54%
1994
$0.324B
▼ 40.88%
$0.324B
▼ 9.24%
$0.357B
▼ 9.39%
$0.394B
▼ 2.48%
$0.404B
▲ 1.00%
$0.4B
▲ 23.46%
$0.324B
▼ 5.54%
$0.343B
▲ 3.31%
$0.332B
▼ 26.22%
$0.45B
▼ 1.10%
$0.455B
▼ 11.99%
$0.517B
▲ 0.98%
$0.512B
▼ 6.57%
1993
$0.548B
▲ 75.64%
$0.548B
▲ 15.61%
$0.474B
▲ 4.18%
$0.455B
▲ 19.42%
$0.381B
▲ 9.48%
$0.348B
▲ 5.78%
$0.329B
▲ 11.53%
$0.295B
▼ 5.14%
$0.311B
▲ 13.09%
$0.275B
▼ 1.43%
$0.279B
▲ 0.36%
$0.278B
▼ 0.71%
$0.28B
▼ 10.26%
1992
$0.312B
▲ 18.63%
$0.312B
▲ 5.41%
$0.296B
▲ 8.03%
$0.274B
▲ 7.87%
$0.254B
▲ 7.17%
$0.237B
▼ 0.84%
$0.239B
▲ 1.27%
$0.236B
▼ 17.19%
$0.285B
▲ 3.26%
$0.276B
▼ 7.07%
$0.297B
▼ 8.33%
$0.324B
▲ 5.88%
$0.306B
▲ 16.35%
1991
$0.263B
▲ 11.91%
$0.263B
▲ 5.20%
$0.25B
— 0.00%
$0.25B
▼ 15.54%
$0.296B
▲ 6.47%
$0.278B
▲ 2.96%
$0.27B
▼ 4.26%
$0.282B
▲ 2.92%
$0.274B
▲ 6.20%
$0.258B
▼ 2.27%
$0.264B
▲ 6.45%
$0.248B
▲ 20.98%
$0.205B
▼ 12.77%
1990
$0.235B
▲ 25.67%
$0.235B
▲ 20.51%
$0.195B
▲ 12.07%
$0.174B
▲ 6.10%
$0.164B
▼ 17.17%
$0.198B
▼ 10.81%
$0.222B
▲ 3.26%
$0.215B
▲ 5.39%
$0.204B
▲ 0.99%
$0.202B
▲ 8.60%
$0.186B
▲ 14.11%
$0.163B
▲ 5.16%
$0.155B
▼ 17.11%
1989
$0.187B
▼ 8.78%
$0.187B
▼ 3.11%
$0.193B
▼ 0.52%
$0.194B
▼ 8.49%
$0.212B
▲ 4.95%
$0.202B
▲ 0.50%
$0.201B
▲ 9.24%
$0.184B
▼ 5.64%
$0.195B
▲ 3.17%
$0.189B
▼ 5.03%
$0.199B
▲ 4.19%
$0.191B
▼ 2.55%
$0.196B
▼ 4.39%
1988
$0.205B
▲ 3.02%
$0.205B
▲ 1.49%
$0.202B
— 0.00%
$0.202B
▼ 8.18%
$0.22B
▼ 1.35%
$0.223B
▲ 1.36%
$0.22B
▼ 10.57%
$0.246B
▲ 23.62%
$0.199B
▼ 2.93%
$0.205B
▲ 6.22%
$0.193B
▲ 6.04%
$0.182B
— 0.00%
$0.182B
▼ 8.54%
1987
$0.199B
▲ 82.57%
$0.199B
▲ 35.37%
$0.147B
▼ 11.98%
$0.167B
▼ 12.57%
$0.191B
▼ 4.02%
$0.199B
▲ 4.19%
$0.191B
▼ 2.55%
$0.196B
▼ 1.51%
$0.199B
▲ 20.61%
$0.165B
▲ 7.14%
$0.154B
▲ 8.45%
$0.142B
▼ 0.70%
$0.143B
▲ 31.19%
1986
$0.109B
▼ 19.85%
$0.109B
▼ 2.68%
$0.112B
— 0.00%
$0.112B
▲ 15.28%
$97.151M
▼ 14.03%
$0.113B
▲ 24.28%
$90.921M
▼ 12.58%
$0.104B
▼ 17.46%
$0.126B
▼ 10.64%
$0.141B
▲ 2.17%
$0.138B
▼ 12.66%
$0.158B
▲ 15.33%
$0.137B
▲ 0.74%
1985
$0.136B
▲ 66.83%
$0.136B
▲ 5.43%
$0.129B
▲ 15.18%
$0.112B
▲ 6.67%
$0.105B
▲ 0.96%
$0.104B
▼ 1.89%
$0.106B
▲ 1.92%
$0.104B
▲ 5.76%
$98.336M
▼ 2.64%
$0.101B
▼ 2.88%
$0.104B
▲ 1.96%
$0.102B
▲ 10.57%
$92.251M
▲ 13.17%
All market cap values reflect closing prices for the period shown.
📊 SEI Investments Market Cap and Other Industry Peers
Below are selected companies from the Financial Services sector / subsector: