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SEI Investments Co (SEIC) stock

SEICNasdaqSecurity Brokers, Dealers & Flotation CompaniesFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Oct 26, 2026Score 17/3022% above fair value
$103.42−1.31 (-1.25%)

Close on Oct 30, 2026Market cap $12.41BP/E 18.2Yield 0.98%

Price history

SEI Investments share prices for every trading day, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$103.42
-1.25% on the day
52-week range
$75.08 – $112.15
-7.8% from the high
Change over 52 weeks
+28.0%
From $80.80 on Oct 30, 2025
Average volume
770,586
Shares a day, last 90 sessions
DateOpenHighLowCloseChangeVolume
Oct 30, 2026$105.22$105.22$102.59$103.42-1.25%764,259
Oct 29, 2026$104.46$105.00$103.63$104.73+1.48%675,040
Oct 28, 2026$102.89$103.58$102.09$103.20+0.31%656,430
Oct 27, 2026$103.50$103.86$102.49$102.88-0.45%771,185
Oct 26, 2026$102.78$103.94$102.78$103.34+1.02%912,185
Oct 23, 2026$104.34$105.27$102.01$102.30-2.11%1,112,225
Oct 22, 2026$108.60$110.00$104.45$104.50-3.62%1,510,443
Oct 21, 2026$107.59$108.53$105.96$108.43+1.19%647,529
Oct 20, 2026$104.79$107.22$104.78$107.15+2.25%904,041
Oct 19, 2026$104.42$105.44$104.39$104.79+0.37%644,136
Oct 16, 2026$106.00$106.81$103.96$104.40-0.83%671,914
Oct 15, 2026$105.69$105.72$102.90$105.270.00%1,026,638
Oct 14, 2026$105.31$105.95$104.47$105.27-0.23%892,760
Oct 13, 2026$105.90$105.90$104.00$105.51+0.49%925,647
Oct 12, 2026$104.70$105.51$104.50$105.00+0.29%633,986
Oct 9, 2026$103.60$105.03$102.62$104.70+1.40%961,748
Oct 8, 2026$102.07$103.79$101.40$103.25+1.16%440,919
Oct 7, 2026$102.84$102.84$100.87$102.07-0.77%546,531
Oct 6, 2026$103.08$103.94$102.54$102.86-0.39%748,509
Oct 5, 2026$102.16$104.04$101.24$103.26+0.81%834,577
Oct 2, 2026$104.57$105.07$102.40$102.43-1.39%619,149
Oct 1, 2026$102.37$103.96$98.45$103.87+1.18%662,555
Sep 30, 2026$103.51$104.38$102.65$102.66-0.67%598,992
Sep 29, 2026$104.48$105.35$103.17$103.35-1.40%552,502
Sep 28, 2026$105.75$105.75$104.09$104.82-0.79%681,702
Sep 25, 2026$105.00$106.12$105.00$105.65+0.83%666,425
Sep 24, 2026$104.99$105.50$103.54$104.78-0.05%923,531
Sep 23, 2026$103.26$105.27$103.26$104.83+1.03%694,088
Sep 22, 2026$105.58$105.94$101.47$103.76-1.54%1,695,224
Sep 21, 2026$106.25$106.25$105.00$105.38+0.17%812,459

Seasonality

SEIC return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.2%-1.1%-0.6%0.3%1.1%2.1%2.9%1.4%-2.7%0.1%6.0%1.1%
Months up5 of 104 of 105 of 107 of 106 of 106 of 106 of 106 of 103 of 106 of 108 of 97 of 9
20267.1%-7.4%-3.5%15.6%-3.1%0.4%17.4%7.8%-7.5%0.7%
20255.0%-7.5%-3.0%0.9%8.9%6.0%-1.9%0.2%-3.9%-5.0%0.3%2.1%
2024-0.5%6.3%6.9%-8.3%2.7%-3.8%4.9%-0.3%2.3%8.1%10.5%0.4%
20237.1%-3.5%-4.5%2.4%-4.0%6.1%5.7%-1.5%-2.9%-10.9%9.3%9.1%
2022-3.8%-0.1%2.8%-7.5%4.9%-6.9%2.5%-1.2%-10.3%10.7%14.7%-5.7%
2021-8.0%6.0%8.8%0.8%3.3%-1.7%-1.9%3.3%-5.6%6.3%-5.4%2.9%
2020-0.3%-16.2%-15.3%10.0%6.4%2.0%-4.8%0.1%-3.1%-3.1%7.3%9.7%
20192.9%11.0%-0.9%4.2%-7.7%12.3%6.2%-3.5%3.0%1.1%7.7%2.0%
20184.6%-3.1%2.9%-15.6%0.9%-1.5%-4.1%5.2%-3.1%-12.5%0.5%-13.3%
2017-1.7%3.8%0.2%0.5%-1.2%8.0%5.1%3.5%4.4%5.7%9.1%2.6%