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 — 2006

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2006-12-29$29.78$31.99498,400
2006-12-28$29.86$32.01333,400
2006-12-27$29.94$32.10485,600
2006-12-26$29.69$31.83301,800
2006-12-22$29.47$31.59532,600
2006-12-21$29.65$31.78711,800
2006-12-20$30.04$32.20520,200
2006-12-19$30.01$32.17518,000
2006-12-18$29.99$32.15807,800
2006-12-15$29.98$32.141,205,000
2006-12-14$29.85$32.00790,800
2006-12-13$29.61$31.74910,600
2006-12-12$29.55$31.68382,200
2006-12-11$29.68$31.82940,600
2006-12-08$29.83$31.99703,600
2006-12-07$29.65$31.79691,000
2006-12-06$29.79$31.94800,400
2006-12-05$29.50$31.63874,000
2006-12-04$29.64$31.77751,800
2006-12-01$29.04$31.13876,200
2006-11-30$29.09$31.19668,400
2006-11-29$29.35$31.47824,600
2006-11-28$29.12$31.21746,600
2006-11-27$28.83$30.91987,000
2006-11-24$29.41$31.53301,400
2006-11-22$29.72$31.86400,200
2006-11-21$29.62$31.75490,400
2006-11-20$29.83$31.98582,400
2006-11-17$29.71$31.85642,200
2006-11-16$29.62$31.75629,800
2006-11-15$29.40$31.52465,400
2006-11-14$29.16$31.26697,600
2006-11-13$28.81$30.88725,600
2006-11-10$28.66$30.72407,400
2006-11-09$28.36$30.411,216,200
2006-11-08$28.79$30.86769,400
2006-11-07$28.59$30.661,003,000
2006-11-06$28.47$30.521,342,600
2006-11-03$28.03$30.051,575,600
2006-11-02$27.79$29.791,355,400
2006-11-01$27.86$29.861,738,600
2006-10-31$28.14$30.17977,600
2006-10-30$28.20$30.23939,800
2006-10-27$28.12$30.151,145,400
2006-10-26$28.19$30.222,735,400
2006-10-25$28.38$30.421,153,000
2006-10-24$28.72$30.791,266,200
2006-10-23$29.01$31.101,257,800
2006-10-20$28.65$30.72772,000
2006-10-19$28.71$30.781,275,800
2006-10-18$29.10$31.201,940,800
2006-10-17$29.39$31.501,963,800
2006-10-16$29.88$32.031,213,600
2006-10-13$29.86$32.011,798,200
2006-10-12$30.26$32.441,586,200
2006-10-11$29.99$32.152,305,800
2006-10-10$29.45$31.571,805,600
2006-10-09$28.97$31.061,196,600
2006-10-06$28.45$30.501,573,400
2006-10-05$29.13$31.231,519,200
2006-10-04$29.00$31.091,542,200
2006-10-03$28.23$30.261,066,600
2006-10-02$28.09$30.121,258,000
2006-09-29$28.09$30.12884,600
2006-09-28$28.17$30.211,399,000
2006-09-27$28.23$30.261,453,600
2006-09-26$27.71$29.711,246,400
2006-09-25$27.13$29.081,058,600
2006-09-22$26.95$28.89570,200
2006-09-21$26.93$28.87899,200
2006-09-20$27.34$29.31938,200
2006-09-19$26.83$28.771,102,600
2006-09-18$26.84$28.781,052,600
2006-09-15$27.03$28.981,778,000
2006-09-14$27.14$29.101,354,800
2006-09-13$27.27$29.241,863,000
2006-09-12$26.86$28.791,352,000
2006-09-11$26.26$28.161,226,800
2006-09-08$26.01$27.891,387,600
2006-09-07$25.89$27.751,032,400
2006-09-06$26.03$27.901,647,600
2006-09-05$25.97$27.84630,800
2006-09-01$25.83$27.69708,000
2006-08-31$25.52$27.36640,200
2006-08-30$25.49$27.32884,200
2006-08-29$25.43$27.26821,800
2006-08-28$25.50$27.33599,600
2006-08-25$25.22$27.03796,400
2006-08-24$25.26$27.09743,800
2006-08-23$25.60$27.45355,800
2006-08-22$25.67$27.521,358,800
2006-08-21$25.93$27.811,061,600
2006-08-18$26.20$28.091,025,800
2006-08-17$26.25$28.14924,200
2006-08-16$25.96$27.832,356,600
2006-08-15$25.57$27.411,692,800
2006-08-14$24.81$26.59769,200
2006-08-11$24.43$26.20647,000
2006-08-10$24.63$26.40725,600
2006-08-09$24.49$26.25663,800
2006-08-08$24.56$26.33611,000
2006-08-07$24.73$26.51783,600
2006-08-04$24.92$26.721,793,000
2006-08-03$24.63$26.41902,400
2006-08-02$24.36$26.11755,600
2006-08-01$24.12$25.861,211,200
2006-07-31$24.43$26.19917,800
2006-07-28$24.32$26.07524,400
2006-07-27$23.73$25.441,449,000
2006-07-26$23.60$25.301,148,400
2006-07-25$23.43$25.121,337,400
2006-07-24$23.32$25.001,200,600
2006-07-21$22.95$24.611,902,600
2006-07-20$23.39$25.071,737,600
2006-07-19$23.55$25.241,721,000
2006-07-18$22.89$24.541,414,400
2006-07-17$22.68$24.321,069,200
2006-07-14$22.70$24.341,740,200
2006-07-13$22.75$24.402,336,400
2006-07-12$23.84$25.561,332,600
2006-07-11$24.13$25.871,159,000
2006-07-10$24.41$26.171,526,400
2006-07-07$24.55$26.321,929,200
2006-07-06$24.48$26.251,156,800
2006-07-05$24.06$25.801,239,000
2006-07-03$24.53$26.30524,600
2006-06-30$24.44$26.202,335,800
2006-06-29$23.63$25.331,302,400
2006-06-28$22.66$24.291,065,800
2006-06-27$22.42$24.04795,400
2006-06-26$22.55$24.18843,200
2006-06-23$22.33$23.951,041,400
2006-06-22$21.97$23.55903,800
2006-06-21$22.21$23.811,759,800
2006-06-20$22.08$23.671,688,800
2006-06-19$22.54$24.17913,000
2006-06-16$22.74$24.38833,600
2006-06-15$22.83$24.481,433,000
2006-06-14$21.78$23.35784,800
2006-06-13$21.75$23.321,524,200
2006-06-12$22.06$23.651,152,800
2006-06-09$22.83$24.48887,800
2006-06-08$22.64$24.27972,600
2006-06-07$22.70$24.331,139,800
2006-06-06$22.40$24.021,326,800
2006-06-05$22.40$23.951,022,000
2006-06-02$23.16$24.76808,000
2006-06-01$23.15$24.751,152,600
2006-05-31$22.70$24.27793,000
2006-05-30$22.30$23.84730,000
2006-05-26$22.61$24.17854,400
2006-05-25$22.29$23.83587,200
2006-05-24$21.90$23.421,206,600
2006-05-23$21.95$23.47841,400
2006-05-22$21.87$23.38805,800
2006-05-19$22.32$23.87645,200
2006-05-18$22.19$23.73921,400
2006-05-17$21.96$23.48798,800
2006-05-16$22.24$23.78936,400
2006-05-15$22.42$23.971,005,400
2006-05-12$22.73$24.301,001,200
2006-05-11$22.47$24.02944,200
2006-05-10$22.83$24.421,019,000
2006-05-09$22.82$24.40981,000
2006-05-08$22.57$24.131,065,000
2006-05-05$22.62$24.181,000,800
2006-05-04$22.23$23.761,683,400
2006-05-03$22.00$23.53918,200
2006-05-02$22.00$23.522,142,000
2006-05-01$20.99$22.44816,000
2006-04-28$21.47$22.96640,400
2006-04-27$21.50$22.99655,400
2006-04-26$21.39$22.87845,000
2006-04-25$21.10$22.56946,000
2006-04-24$21.04$22.50647,400
2006-04-21$21.04$22.501,390,000
2006-04-20$21.12$22.58732,000
2006-04-19$21.22$22.681,176,800
2006-04-18$20.90$22.35900,800
2006-04-17$20.26$21.67555,800
2006-04-13$20.12$21.51527,000
2006-04-12$20.01$21.40855,200
2006-04-11$19.86$21.241,704,000
2006-04-10$20.15$21.55531,600
2006-04-07$20.17$21.57378,000
2006-04-06$20.49$21.90422,400
2006-04-05$20.51$21.93836,200
2006-04-04$20.17$21.57673,000
2006-04-03$20.21$21.61970,400
2006-03-31$20.26$21.67607,400
2006-03-30$20.11$21.50509,400
2006-03-29$20.16$21.56696,800
2006-03-28$20.12$21.51538,600
2006-03-27$20.11$21.50646,200
2006-03-24$20.15$21.55666,400
2006-03-23$20.11$21.50499,400
2006-03-22$20.15$21.54732,200
2006-03-21$20.19$21.59560,200
2006-03-20$20.31$21.71718,600
2006-03-17$20.31$21.72745,400
2006-03-16$20.33$21.73836,600
2006-03-15$20.24$21.64520,800
2006-03-14$20.25$21.65577,800
2006-03-13$20.21$21.60642,200
2006-03-10$20.23$21.63432,600
2006-03-09$20.09$21.49444,800
2006-03-08$20.45$21.87610,600
2006-03-07$20.39$21.80468,400
2006-03-06$20.41$21.82361,200
2006-03-03$20.56$21.98686,600
2006-03-02$20.92$22.37517,800
2006-03-01$21.15$22.61603,600
2006-02-28$20.90$22.34464,800
2006-02-27$21.14$22.60692,600
2006-02-24$21.12$22.58563,400
2006-02-23$20.85$22.29462,000
2006-02-22$20.89$22.33658,000
2006-02-21$20.66$22.09565,400
2006-02-17$21.17$22.64457,400
2006-02-16$21.08$22.54630,400
2006-02-15$21.22$22.69580,600
2006-02-14$21.07$22.53663,400
2006-02-13$21.07$22.53448,200
2006-02-10$21.08$22.53482,200
2006-02-09$21.05$22.51429,200
2006-02-08$21.14$22.60755,200
2006-02-07$20.83$22.27842,000
2006-02-06$20.74$22.18549,400
2006-02-03$20.68$22.11862,400
2006-02-02$20.78$22.211,078,200
2006-02-01$21.14$22.601,402,800
2006-01-31$20.63$22.051,164,000
2006-01-30$20.25$21.651,121,400
2006-01-27$20.23$21.63773,800
2006-01-26$20.26$21.661,227,400
2006-01-25$20.00$21.391,672,600
2006-01-24$20.00$21.391,141,800
2006-01-23$19.36$20.70536,600
2006-01-20$19.22$20.55654,600
2006-01-19$19.60$20.96446,600
2006-01-18$19.31$20.65478,800
2006-01-17$19.36$20.70688,800
2006-01-13$19.57$20.92438,400
2006-01-12$19.79$21.16499,000
2006-01-11$19.95$21.33784,800
2006-01-10$19.93$21.31822,800
2006-01-09$19.68$21.04673,000
2006-01-06$19.53$20.88603,400
2006-01-05$19.14$20.47772,000
2006-01-04$19.22$20.551,272,800
2006-01-03$18.67$19.971,162,400