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 — 1988

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1988-12-30$0.73$0.735,217,600
1988-12-29$0.73$0.74787,200
1988-12-28$0.73$0.732,620,800
1988-12-27$0.73$0.73153,600
1988-12-23$0.74$0.74434,400
1988-12-22$0.73$0.737,065,600
1988-12-21$0.74$0.752,284,800
1988-12-20$0.73$0.73559,200
1988-12-19$0.73$0.74772,800
1988-12-16$0.73$0.731,461,600
1988-12-15$0.73$0.73962,400
1988-12-14$0.72$0.73340,800
1988-12-13$0.72$0.721,108,800
1988-12-12$0.72$0.72199,200
1988-12-09$0.73$0.73259,200
1988-12-08$0.74$0.741,274,400
1988-12-07$0.72$0.72127,200
1988-12-06$0.72$0.721,488,000
1988-12-05$0.73$0.73900,000
1988-12-02$0.72$0.72748,800
1988-12-01$0.72$0.724,324,800
1988-11-30$0.72$0.723,170,400
1988-11-29$0.72$0.73799,200
1988-11-28$0.72$0.72892,800
1988-11-25$0.72$0.72739,200
1988-11-23$0.73$0.73249,600
1988-11-22$0.72$0.73890,400
1988-11-21$0.73$0.73506,400
1988-11-18$0.74$0.74304,800
1988-11-17$0.73$0.73698,400
1988-11-16$0.71$0.72415,200
1988-11-15$0.74$0.741,046,400
1988-11-14$0.72$0.721,320,000
1988-11-11$0.72$0.72652,800
1988-11-10$0.74$0.74357,600
1988-11-09$0.74$0.74357,600
1988-11-08$0.74$0.741,749,600
1988-11-07$0.74$0.74669,600
1988-11-04$0.74$0.743,741,600
1988-11-03$0.74$0.744,142,400
1988-11-02$0.73$0.732,632,800
1988-11-01$0.72$0.721,728,000
1988-10-31$0.72$0.721,176,000
1988-10-28$0.71$0.71417,600
1988-10-27$0.72$0.72326,400
1988-10-26$0.72$0.7260,000
1988-10-25$0.71$0.72278,400
1988-10-24$0.71$0.715,565,600
1988-10-21$0.70$0.701,701,600
1988-10-20$0.70$0.701,077,600
1988-10-19$0.68$0.682,606,400
1988-10-18$0.68$0.682,553,600
1988-10-17$0.68$0.683,002,400
1988-10-14$0.75$0.751,636,800
1988-10-13$0.79$0.791,185,600
1988-10-12$0.78$0.78300,000
1988-10-11$0.80$0.80357,600
1988-10-10$0.79$0.79292,800
1988-10-07$0.78$0.78710,400
1988-10-06$0.78$0.78266,400
1988-10-05$0.76$0.7636,000
1988-10-04$0.76$0.76516,000
1988-10-03$0.78$0.781,516,800
1988-09-30$0.78$0.78607,200
1988-09-29$0.78$0.78787,200
1988-09-28$0.78$0.78103,200
1988-09-27$0.78$0.7855,200
1988-09-26$0.80$0.801,096,800
1988-09-23$0.79$0.79105,600
1988-09-22$0.79$0.79871,200
1988-09-21$0.79$0.791,003,200
1988-09-20$0.80$0.802,532,000
1988-09-19$0.80$0.805,700,000
1988-09-16$0.79$0.79614,400
1988-09-15$0.79$0.79513,600
1988-09-14$0.79$0.79472,800
1988-09-13$0.79$0.79297,600
1988-09-12$0.77$0.77969,600
1988-09-09$0.77$0.771,569,600
1988-09-08$0.79$0.79446,400
1988-09-07$0.78$0.781,240,800
1988-09-06$0.80$0.801,425,600
1988-09-02$0.79$0.79156,000
1988-09-01$0.79$0.791,120,800
1988-08-31$0.79$0.79928,800
1988-08-30$0.79$0.79784,800
1988-08-29$0.80$0.80794,400
1988-08-26$0.79$0.7996,000
1988-08-25$0.80$0.80585,600
1988-08-24$0.81$0.81180,000
1988-08-23$0.81$0.811,272,000
1988-08-22$0.81$0.81492,000
1988-08-19$0.81$0.81355,200
1988-08-18$0.82$0.8364,800
1988-08-17$0.82$0.83808,800
1988-08-16$0.80$0.801,056,000
1988-08-15$0.78$0.78559,200
1988-08-12$0.79$0.791,468,800
1988-08-11$0.78$0.781,941,600
1988-08-10$0.78$0.78669,600
1988-08-09$0.79$0.791,497,600
1988-08-08$0.78$0.78206,400
1988-08-05$0.78$0.78772,800
1988-08-04$0.78$0.781,711,200
1988-08-03$0.79$0.791,766,400
1988-08-02$0.80$0.80326,400
1988-08-01$0.79$0.79168,000
1988-07-29$0.78$0.78283,200
1988-07-28$0.75$0.75297,600
1988-07-27$0.76$0.76513,600
1988-07-26$0.76$0.761,094,400
1988-07-25$0.75$0.75504,000
1988-07-22$0.77$0.77297,600
1988-07-21$0.79$0.79268,800
1988-07-20$0.77$0.7714,400
1988-07-19$0.79$0.7993,600
1988-07-18$0.79$0.79117,600
1988-07-15$0.77$0.77374,400
1988-07-14$0.78$0.78772,800
1988-07-13$0.77$0.77110,400
1988-07-12$0.78$0.78984,000
1988-07-11$0.80$0.801,857,600
1988-07-08$0.82$0.831,545,600
1988-07-07$0.83$0.84981,600
1988-07-06$0.85$0.86348,000
1988-07-05$0.88$0.88840,000
1988-07-01$0.88$0.88422,400
1988-06-30$0.88$0.885,054,400
1988-06-29$0.89$0.894,891,200
1988-06-28$0.89$0.89458,400
1988-06-27$0.83$0.84374,400
1988-06-24$0.84$0.85403,200
1988-06-23$0.84$0.85256,800
1988-06-22$0.83$0.841,545,600
1988-06-21$0.82$0.833,393,600
1988-06-20$0.81$0.81768,000
1988-06-17$0.82$0.825,289,600
1988-06-16$0.80$0.801,216,800
1988-06-15$0.79$0.792,200,800
1988-06-14$0.77$0.772,236,800
1988-06-13$0.78$0.78902,400
1988-06-10$0.77$0.771,140,000
1988-06-09$0.79$0.79732,000
1988-06-08$0.77$0.771,236,000
1988-06-07$0.75$0.75669,600
1988-06-06$0.74$0.74996,000
1988-06-03$0.73$0.7384,000
1988-06-02$0.74$0.74208,800
1988-06-01$0.73$0.73523,200
1988-05-31$0.71$0.71484,800
1988-05-27$0.72$0.721,545,600
1988-05-26$0.73$0.73967,200
1988-05-25$0.71$0.711,440,000
1988-05-24$0.71$0.71489,600
1988-05-23$0.71$0.711,605,600
1988-05-20$0.70$0.701,368,000
1988-05-19$0.70$0.702,107,200
1988-05-18$0.73$0.731,720,800
1988-05-17$0.74$0.74880,800
1988-05-16$0.73$0.73612,000
1988-05-13$0.73$0.73208,800
1988-05-12$0.72$0.72151,200
1988-05-11$0.72$0.7248,000
1988-05-10$0.72$0.72216,000
1988-05-09$0.72$0.72460,800
1988-05-06$0.72$0.72163,200
1988-05-05$0.74$0.7496,000
1988-05-04$0.72$0.72249,600
1988-05-03$0.72$0.721,024,800
1988-05-02$0.72$0.72139,200
1988-04-29$0.73$0.731,015,200
1988-04-28$0.74$0.74220,800
1988-04-27$0.75$0.751,296,000
1988-04-26$0.77$0.77921,600
1988-04-25$0.76$0.761,149,600
1988-04-22$0.74$0.74158,400
1988-04-21$0.74$0.741,190,400
1988-04-20$0.76$0.761,207,200
1988-04-19$0.76$0.761,406,400
1988-04-18$0.75$0.751,029,600
1988-04-15$0.71$0.7198,400
1988-04-14$0.71$0.71768,000
1988-04-13$0.73$0.731,428,000
1988-04-12$0.72$0.722,054,400
1988-04-11$0.72$0.72247,200
1988-04-08$0.71$0.71955,200
1988-04-07$0.72$0.722,419,200
1988-04-06$0.71$0.71153,600
1988-04-05$0.70$0.70547,200
1988-04-04$0.68$0.68412,800
1988-03-31$0.69$0.69768,000
1988-03-30$0.69$0.69127,200
1988-03-29$0.70$0.70230,400
1988-03-28$0.69$0.6957,600
1988-03-25$0.68$0.68268,800
1988-03-24$0.68$0.68256,800
1988-03-23$0.72$0.72367,200
1988-03-22$0.71$0.713,074,400
1988-03-21$0.71$0.71432,000
1988-03-18$0.72$0.724,435,200
1988-03-17$0.74$0.742,452,800
1988-03-16$0.70$0.703,038,400
1988-03-15$0.68$0.68806,400
1988-03-14$0.66$0.66554,400
1988-03-11$0.69$0.6979,200
1988-03-10$0.69$0.69218,400
1988-03-09$0.68$0.681,144,800
1988-03-08$0.67$0.67285,600
1988-03-07$0.69$0.69914,400
1988-03-04$0.68$0.68362,400
1988-03-03$0.68$0.68475,200
1988-03-02$0.69$0.691,236,000
1988-03-01$0.70$0.702,277,600
1988-02-29$0.65$0.65158,400
1988-02-26$0.66$0.661,029,600
1988-02-25$0.63$0.622,025,600
1988-02-24$0.63$0.6216,800
1988-02-23$0.64$0.64710,400
1988-02-22$0.63$0.62230,400
1988-02-19$0.63$0.621,473,600
1988-02-18$0.61$0.61278,400
1988-02-17$0.60$0.6021,600
1988-02-16$0.60$0.6067,200
1988-02-12$0.61$0.611,104,000
1988-02-11$0.61$0.611,372,800
1988-02-10$0.59$0.59789,600
1988-02-09$0.60$0.60124,800
1988-02-08$0.60$0.601,286,400
1988-02-05$0.61$0.61955,200
1988-02-04$0.61$0.61799,200
1988-02-03$0.63$0.6262,400
1988-02-02$0.64$0.642,191,200
1988-02-01$0.65$0.651,034,400
1988-01-29$0.65$0.65146,400
1988-01-28$0.65$0.65187,200
1988-01-27$0.64$0.64228,000
1988-01-26$0.63$0.62144,000
1988-01-25$0.64$0.6479,200
1988-01-22$0.63$0.6240,800
1988-01-21$0.61$0.61468,000
1988-01-20$0.65$0.65724,800
1988-01-19$0.66$0.66854,400
1988-01-18$0.63$0.62770,400
1988-01-15$0.63$0.62151,200
1988-01-14$0.63$0.6233,600
1988-01-13$0.65$0.6512,000
1988-01-12$0.64$0.64393,600
1988-01-11$0.61$0.61681,600
1988-01-08$0.60$0.60460,800
1988-01-07$0.66$0.66312,000
1988-01-06$0.66$0.661,111,200
1988-01-05$0.69$0.693,264,000
1988-01-04$0.73$0.7391,200