NASDAQ:SEIC | Historical Stock Price | SEI INVESTMENTS CO

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1981-03-25 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.18$0.70$2.72$10.58$41.07$159.491981-03-252026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2008

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2008-12-31$15.71$17.011,222,200
2008-12-30$15.28$16.54903,800
2008-12-29$14.44$15.63500,700
2008-12-26$14.76$15.98718,000
2008-12-24$14.54$15.74379,700
2008-12-23$14.78$16.00989,400
2008-12-22$14.86$16.091,181,900
2008-12-19$15.82$17.132,331,000
2008-12-18$14.98$16.221,490,700
2008-12-17$15.08$16.321,832,800
2008-12-16$14.62$15.831,835,000
2008-12-15$13.31$14.411,055,500
2008-12-12$13.68$14.811,340,300
2008-12-11$13.76$14.901,296,100
2008-12-10$14.38$15.571,303,600
2008-12-09$14.42$15.611,819,100
2008-12-08$15.53$16.811,627,200
2008-12-05$14.51$15.711,549,900
2008-12-04$13.85$14.991,204,600
2008-12-03$14.82$16.04881,400
2008-12-02$13.85$14.991,037,000
2008-12-01$13.20$14.291,177,300
2008-11-28$15.46$16.74448,300
2008-11-26$15.13$16.381,325,200
2008-11-25$14.20$15.371,460,400
2008-11-24$14.08$15.241,758,000
2008-11-21$13.14$14.221,273,700
2008-11-20$12.25$13.261,472,100
2008-11-19$13.63$14.76883,700
2008-11-18$15.43$16.70938,000
2008-11-17$15.30$16.56864,800
2008-11-14$15.67$16.96946,900
2008-11-13$16.56$17.931,007,500
2008-11-12$14.90$16.13789,300
2008-11-11$16.07$17.40752,300
2008-11-10$16.13$17.46635,500
2008-11-07$16.90$18.29719,500
2008-11-06$15.76$17.06892,100
2008-11-05$16.93$18.33647,400
2008-11-04$18.39$19.91783,800
2008-11-03$17.26$18.68795,600
2008-10-31$17.68$19.14685,400
2008-10-30$17.34$18.77851,400
2008-10-29$16.52$17.88897,900
2008-10-28$16.45$17.811,303,800
2008-10-27$13.95$15.10768,400
2008-10-24$14.57$15.771,174,800
2008-10-23$14.65$15.861,118,900
2008-10-22$15.77$17.071,069,100
2008-10-21$17.52$18.971,159,800
2008-10-20$18.49$20.02794,000
2008-10-17$17.15$18.57581,100
2008-10-16$17.30$18.731,439,000
2008-10-15$16.34$17.691,517,900
2008-10-14$17.38$18.811,663,800
2008-10-13$17.74$19.201,365,000
2008-10-10$15.41$16.681,858,600
2008-10-09$15.47$16.751,748,200
2008-10-08$17.82$19.29960,200
2008-10-07$18.40$19.92871,300
2008-10-06$19.70$21.33918,600
2008-10-03$21.20$22.95584,100
2008-10-02$21.85$23.65452,900
2008-10-01$23.77$25.73554,200
2008-09-30$22.20$24.03944,100
2008-09-29$18.95$20.511,097,600
2008-09-26$21.87$23.68556,200
2008-09-25$22.30$24.14545,600
2008-09-24$22.99$24.89944,400
2008-09-23$22.02$23.84850,200
2008-09-22$20.27$21.941,274,700
2008-09-19$21.38$23.143,690,400
2008-09-18$19.56$21.173,935,000
2008-09-17$20.34$22.021,914,200
2008-09-16$22.69$24.562,024,400
2008-09-15$22.70$24.571,441,900
2008-09-12$23.04$24.94654,300
2008-09-11$22.80$24.68802,200
2008-09-10$22.68$24.55920,800
2008-09-09$22.63$24.501,472,900
2008-09-08$24.22$26.221,663,400
2008-09-05$23.15$25.061,018,700
2008-09-04$22.96$24.861,504,000
2008-09-03$23.73$25.69919,500
2008-09-02$23.97$25.95927,600
2008-08-29$23.62$25.57938,600
2008-08-28$23.64$25.591,056,700
2008-08-27$22.94$24.83529,000
2008-08-26$22.99$24.89651,300
2008-08-25$22.67$24.54551,200
2008-08-22$23.04$24.94490,000
2008-08-21$22.56$24.42645,100
2008-08-20$22.98$24.88650,800
2008-08-19$22.70$24.57782,500
2008-08-18$23.34$25.27658,900
2008-08-15$24.09$26.08815,900
2008-08-14$24.06$26.05860,000
2008-08-13$23.98$25.96918,400
2008-08-12$23.95$25.931,080,700
2008-08-11$24.48$26.50724,800
2008-08-08$24.11$26.10897,900
2008-08-07$23.02$24.921,095,200
2008-08-06$23.23$25.151,158,900
2008-08-05$23.51$25.451,677,500
2008-08-04$23.28$25.201,102,300
2008-08-01$23.50$25.441,161,900
2008-07-31$23.03$24.931,425,700
2008-07-30$23.53$25.471,389,800
2008-07-29$23.41$25.341,335,000
2008-07-28$22.16$23.991,298,000
2008-07-25$22.57$24.431,128,800
2008-07-24$22.79$24.672,263,500
2008-07-23$23.29$25.212,746,400
2008-07-22$23.47$25.411,258,900
2008-07-21$22.41$24.26816,300
2008-07-18$22.97$24.871,039,900
2008-07-17$22.74$24.622,039,500
2008-07-16$22.90$24.791,375,000
2008-07-15$21.31$23.071,253,700
2008-07-14$21.35$23.111,493,900
2008-07-11$22.54$24.401,071,100
2008-07-10$22.65$24.521,056,800
2008-07-09$22.30$24.141,411,000
2008-07-08$23.35$25.281,298,200
2008-07-07$22.44$24.291,498,700
2008-07-03$22.53$24.39853,100
2008-07-02$23.21$25.13914,900
2008-07-01$23.90$25.871,347,000
2008-06-30$23.52$25.461,469,600
2008-06-27$23.75$25.711,563,700
2008-06-26$24.18$26.181,131,100
2008-06-25$25.40$27.50889,000
2008-06-24$25.51$27.62895,000
2008-06-23$25.51$27.62736,100
2008-06-20$25.55$27.661,327,300
2008-06-19$26.39$28.57935,500
2008-06-18$25.99$28.141,235,600
2008-06-17$25.50$27.601,048,000
2008-06-16$25.73$27.85969,000
2008-06-13$25.59$27.701,435,600
2008-06-12$25.11$27.101,439,300
2008-06-11$24.81$26.771,383,900
2008-06-10$25.43$27.441,853,900
2008-06-09$24.62$26.571,549,700
2008-06-06$24.54$26.481,355,700
2008-06-05$25.55$27.571,850,600
2008-06-04$24.12$26.031,063,000
2008-06-03$23.98$25.881,476,800
2008-06-02$23.75$25.63963,200
2008-05-30$24.12$26.031,109,300
2008-05-29$24.16$26.07833,800
2008-05-28$23.45$25.30737,900
2008-05-27$23.45$25.30621,200
2008-05-23$23.23$25.071,203,700
2008-05-22$23.87$25.761,636,000
2008-05-21$22.89$24.70708,800
2008-05-20$23.37$25.221,182,800
2008-05-19$23.81$25.69826,100
2008-05-16$24.15$26.06705,100
2008-05-15$24.28$26.20825,600
2008-05-14$24.07$25.972,458,600
2008-05-13$23.41$25.261,234,600
2008-05-12$23.47$25.331,019,700
2008-05-09$23.45$25.30902,300
2008-05-08$23.10$24.931,413,300
2008-05-07$23.72$25.601,207,000
2008-05-06$24.50$26.44704,800
2008-05-05$24.65$26.60729,400
2008-05-02$24.71$26.66910,800
2008-05-01$24.73$26.691,602,000
2008-04-30$23.27$25.112,074,000
2008-04-29$23.85$25.741,685,500
2008-04-28$23.94$25.831,219,200
2008-04-25$24.27$26.191,081,400
2008-04-24$24.53$26.471,494,900
2008-04-23$24.34$26.272,794,300
2008-04-22$23.77$25.651,294,300
2008-04-21$24.69$26.64520,200
2008-04-18$25.00$26.98784,100
2008-04-17$24.84$26.80686,700
2008-04-16$24.65$26.60848,700
2008-04-15$24.07$25.97854,500
2008-04-14$23.96$25.86525,300
2008-04-11$24.05$25.95763,700
2008-04-10$24.91$26.881,093,600
2008-04-09$25.17$27.16702,100
2008-04-08$25.93$27.98452,800
2008-04-07$26.32$28.40505,700
2008-04-04$26.20$28.27526,100
2008-04-03$26.52$28.62681,400
2008-04-02$26.68$28.791,112,200
2008-04-01$26.16$28.23822,000
2008-03-31$24.69$26.64705,500
2008-03-28$24.43$26.36672,100
2008-03-27$24.68$26.63693,500
2008-03-26$25.06$27.04716,700
2008-03-25$26.24$28.32817,300
2008-03-24$25.80$27.84717,300
2008-03-20$25.44$27.45780,100
2008-03-19$24.41$26.34785,100
2008-03-18$25.27$27.271,040,800
2008-03-17$23.93$25.821,208,200
2008-03-14$24.15$26.06994,600
2008-03-13$24.97$26.941,094,500
2008-03-12$24.46$26.391,152,300
2008-03-11$25.18$27.171,393,900
2008-03-10$23.21$25.051,962,400
2008-03-07$24.11$26.021,272,200
2008-03-06$24.73$26.69726,000
2008-03-05$25.49$27.511,055,900
2008-03-04$25.47$27.481,301,900
2008-03-03$25.04$27.02752,600
2008-02-29$25.01$26.99814,800
2008-02-28$25.76$27.80915,000
2008-02-27$26.43$28.52821,100
2008-02-26$25.74$27.781,145,800
2008-02-25$25.42$27.431,127,300
2008-02-22$24.76$26.721,031,300
2008-02-21$24.87$26.84730,000
2008-02-20$25.21$27.201,316,400
2008-02-19$24.76$26.72645,700
2008-02-15$25.32$27.32966,200
2008-02-14$25.50$27.521,050,600
2008-02-13$26.28$28.361,259,400
2008-02-12$25.65$27.681,680,400
2008-02-11$25.58$27.601,572,500
2008-02-08$26.24$28.321,225,100
2008-02-07$26.31$28.392,243,100
2008-02-06$26.58$28.681,118,100
2008-02-05$27.67$29.861,650,600
2008-02-04$28.48$30.731,663,900
2008-02-01$28.46$30.711,774,300
2008-01-31$27.70$29.891,279,700
2008-01-30$28.50$30.751,713,000
2008-01-29$28.65$30.921,289,500
2008-01-28$27.89$30.101,150,200
2008-01-25$26.69$28.801,291,600
2008-01-24$27.27$29.431,175,400
2008-01-23$26.86$28.981,642,600
2008-01-22$26.30$28.381,121,500
2008-01-18$26.33$28.411,160,700
2008-01-17$26.21$28.281,287,900
2008-01-16$27.16$29.311,432,500
2008-01-15$27.39$29.561,227,800
2008-01-14$28.45$30.70704,700
2008-01-11$28.17$30.401,114,600
2008-01-10$28.85$31.13726,100
2008-01-09$27.86$30.061,691,200
2008-01-08$27.50$29.672,237,200
2008-01-07$29.12$31.421,025,200
2008-01-04$29.22$31.531,058,000
2008-01-03$30.14$32.521,005,100
2008-01-02$30.49$32.901,055,000