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 — 1987

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1987-12-31$0.71$0.71290,400
1987-12-30$0.69$0.691,284,000
1987-12-29$0.67$0.67825,600
1987-12-28$0.68$0.68410,400
1987-12-24$0.67$0.67319,200
1987-12-23$0.66$0.66393,600
1987-12-22$0.68$0.681,003,200
1987-12-21$0.66$0.66283,200
1987-12-18$0.63$0.621,084,800
1987-12-17$0.60$0.60364,800
1987-12-16$0.63$0.62806,400
1987-12-15$0.60$0.60288,000
1987-12-14$0.58$0.58374,400
1987-12-11$0.57$0.57194,400
1987-12-10$0.57$0.57103,200
1987-12-09$0.61$0.611,147,200
1987-12-08$0.60$0.601,034,400
1987-12-07$0.56$0.561,195,200
1987-12-04$0.53$0.53285,600
1987-12-03$0.55$0.55127,200
1987-12-02$0.57$0.57129,600
1987-12-01$0.56$0.561,958,400
1987-11-30$0.52$0.52604,800
1987-11-27$0.57$0.5736,000
1987-11-25$0.55$0.557,200
1987-11-24$0.56$0.56386,400
1987-11-23$0.56$0.56288,000
1987-11-20$0.57$0.57235,200
1987-11-19$0.58$0.58280,800
1987-11-18$0.58$0.58261,600
1987-11-17$0.55$0.55249,600
1987-11-16$0.58$0.58513,600
1987-11-13$0.58$0.58422,400
1987-11-12$0.59$0.591,404,000
1987-11-11$0.56$0.56364,800
1987-11-10$0.55$0.5572,000
1987-11-09$0.56$0.56240,000
1987-11-06$0.58$0.58314,400
1987-11-05$0.57$0.571,248,000
1987-11-04$0.56$0.563,360,000
1987-11-03$0.56$0.56439,200
1987-11-02$0.57$0.57667,200
1987-10-30$0.59$0.59532,800
1987-10-29$0.54$0.542,126,400
1987-10-28$0.49$0.491,108,800
1987-10-27$0.45$0.451,466,400
1987-10-26$0.45$0.453,326,400
1987-10-23$0.56$0.562,107,200
1987-10-22$0.58$0.584,694,400
1987-10-21$0.58$0.58888,000
1987-10-20$0.57$0.571,677,600
1987-10-19$0.56$0.562,181,600
1987-10-16$0.63$0.621,675,200
1987-10-15$0.65$0.65417,600
1987-10-14$0.67$0.67484,800
1987-10-13$0.71$0.71122,400
1987-10-12$0.70$0.70266,400
1987-10-09$0.70$0.70451,200
1987-10-08$0.71$0.71460,800
1987-10-07$0.72$0.72636,000
1987-10-06$0.73$0.731,257,600
1987-10-05$0.70$0.701,759,200
1987-10-02$0.66$0.661,344,000
1987-10-01$0.66$0.661,161,600
1987-09-30$0.68$0.68194,400
1987-09-29$0.66$0.66194,400
1987-09-28$0.66$0.6628,800
1987-09-25$0.68$0.68273,600
1987-09-24$0.68$0.6828,800
1987-09-23$0.67$0.67667,200
1987-09-22$0.68$0.68297,600
1987-09-21$0.68$0.68240,000
1987-09-18$0.68$0.68112,800
1987-09-17$0.69$0.69115,200
1987-09-16$0.69$0.69350,400
1987-09-15$0.69$0.6933,600
1987-09-14$0.71$0.71139,200
1987-09-11$0.69$0.691,161,600
1987-09-10$0.67$0.67717,600
1987-09-09$0.67$0.67283,200
1987-09-08$0.68$0.6826,400
1987-09-04$0.69$0.69148,800
1987-09-03$0.66$0.66861,600
1987-09-02$0.67$0.67612,000
1987-09-01$0.68$0.681,543,200
1987-08-31$0.71$0.714,848,000
1987-08-28$0.72$0.72314,400
1987-08-27$0.73$0.73232,800
1987-08-26$0.70$0.702,083,200
1987-08-25$0.71$0.713,933,600
1987-08-24$0.71$0.712,743,200
1987-08-21$0.70$0.701,068,000
1987-08-20$0.69$0.691,368,000
1987-08-19$0.69$0.691,288,800
1987-08-18$0.72$0.72307,200
1987-08-17$0.73$0.73218,400
1987-08-14$0.73$0.731,682,400
1987-08-13$0.74$0.74854,400
1987-08-12$0.71$0.71259,200
1987-08-11$0.72$0.72988,800
1987-08-10$0.71$0.71880,800
1987-08-07$0.68$0.682,856,000
1987-08-06$0.66$0.66316,800
1987-08-05$0.66$0.66434,400
1987-08-04$0.66$0.665,294,400
1987-08-03$0.66$0.66784,800
1987-07-31$0.68$0.681,838,400
1987-07-30$0.63$0.62496,800
1987-07-29$0.66$0.66386,400
1987-07-28$0.69$0.69228,000
1987-07-27$0.70$0.70268,800
1987-07-24$0.71$0.71518,400
1987-07-23$0.69$0.69504,000
1987-07-22$0.70$0.701,116,000
1987-07-21$0.69$0.6986,400
1987-07-20$0.71$0.711,041,600
1987-07-17$0.69$0.69715,200
1987-07-16$0.71$0.71153,600
1987-07-15$0.71$0.7179,200
1987-07-14$0.70$0.701,682,400
1987-07-13$0.71$0.711,776,000
1987-07-10$0.71$0.71482,400
1987-07-09$0.72$0.721,396,800
1987-07-08$0.73$0.731,792,800
1987-07-07$0.73$0.73904,800
1987-07-06$0.71$0.713,492,000
1987-07-02$0.71$0.71657,600
1987-07-01$0.71$0.71184,800
1987-06-30$0.70$0.70758,400
1987-06-29$0.71$0.71576,000
1987-06-26$0.70$0.701,740,000
1987-06-25$0.70$0.70184,800
1987-06-24$0.69$0.691,053,600
1987-06-23$0.69$0.69187,200
1987-06-22$0.70$0.70201,600
1987-06-19$0.69$0.691,056,000
1987-06-18$0.67$0.67480,000
1987-06-17$0.66$0.66475,200
1987-06-16$0.67$0.6791,200
1987-06-15$0.67$0.6786,400
1987-06-12$0.66$0.6672,000
1987-06-11$0.66$0.6672,000
1987-06-10$0.66$0.66537,600
1987-06-09$0.66$0.66753,600
1987-06-08$0.67$0.67417,600
1987-06-05$0.67$0.67384,000
1987-06-04$0.66$0.66484,800
1987-06-03$0.67$0.67950,400
1987-06-02$0.69$0.69460,800
1987-06-01$0.69$0.69398,400
1987-05-29$0.70$0.701,752,000
1987-05-28$0.69$0.691,243,200
1987-05-27$0.69$0.69153,600
1987-05-26$0.69$0.69609,600
1987-05-22$0.67$0.671,108,800
1987-05-21$0.66$0.66825,600
1987-05-20$0.63$0.621,291,200
1987-05-19$0.64$0.64192,000
1987-05-18$0.65$0.651,560,000
1987-05-15$0.68$0.68796,800
1987-05-14$0.67$0.67676,800
1987-05-13$0.64$0.64460,800
1987-05-12$0.63$0.631,166,400
1987-05-11$0.64$0.641,430,400
1987-05-08$0.63$0.63518,400
1987-05-07$0.63$0.62230,400
1987-05-06$0.63$0.635,889,600
1987-05-05$0.61$0.612,515,200
1987-05-04$0.60$0.601,070,400
1987-05-01$0.61$0.61700,800
1987-04-30$0.58$0.581,776,000
1987-04-29$0.57$0.571,598,400
1987-04-28$0.58$0.58254,400
1987-04-27$0.57$0.57360,000
1987-04-24$0.57$0.57336,000
1987-04-23$0.58$0.58432,000
1987-04-22$0.59$0.59134,400
1987-04-21$0.59$0.59619,200
1987-04-20$0.60$0.601,910,400
1987-04-16$0.58$0.58729,600
1987-04-15$0.55$0.552,496,000
1987-04-14$0.50$0.502,337,600
1987-04-13$0.57$0.571,036,800
1987-04-10$0.60$0.60576,000
1987-04-09$0.61$0.61158,400
1987-04-08$0.62$0.621,267,200
1987-04-07$0.63$0.635,236,800
1987-04-06$0.63$0.626,259,200
1987-04-03$0.59$0.5911,529,600
1987-04-02$0.56$0.565,544,000
1987-04-01$0.54$0.54288,000
1987-03-31$0.54$0.54489,600
1987-03-30$0.54$0.54292,800
1987-03-27$0.54$0.5448,000
1987-03-26$0.54$0.541,449,600
1987-03-25$0.53$0.532,203,200
1987-03-24$0.53$0.53192,000
1987-03-23$0.54$0.54676,800
1987-03-20$0.53$0.53734,400
1987-03-19$0.53$0.5386,400
1987-03-18$0.53$0.53331,200
1987-03-17$0.53$0.53494,400
1987-03-16$0.53$0.53460,800
1987-03-13$0.55$0.55508,800
1987-03-12$0.54$0.541,262,400
1987-03-11$0.54$0.541,132,800
1987-03-10$0.53$0.531,089,600
1987-03-09$0.52$0.52148,800
1987-03-06$0.52$0.521,363,200
1987-03-05$0.52$0.52124,800
1987-03-04$0.52$0.527,036,800
1987-03-03$0.52$0.52518,400
1987-03-02$0.51$0.511,651,200
1987-02-27$0.50$0.501,166,400
1987-02-26$0.49$0.49259,200
1987-02-25$0.49$0.49201,600
1987-02-24$0.50$0.50216,000
1987-02-23$0.50$0.50163,200
1987-02-20$0.51$0.51619,200
1987-02-19$0.51$0.512,467,200
1987-02-18$0.51$0.51494,400
1987-02-17$0.50$0.501,531,200
1987-02-13$0.50$0.50393,600
1987-02-12$0.49$0.49331,200
1987-02-11$0.48$0.48484,800
1987-02-10$0.48$0.48268,800
1987-02-09$0.48$0.4816,924,800
1987-02-06$0.51$0.5122,872,000
1987-02-05$0.51$0.51283,200
1987-02-04$0.52$0.521,483,200
1987-02-03$0.51$0.514,684,800
1987-02-02$0.51$0.51244,800
1987-01-30$0.51$0.515,817,600
1987-01-29$0.50$0.50614,400
1987-01-28$0.49$0.49614,400
1987-01-27$0.48$0.48806,400
1987-01-26$0.47$0.471,281,600
1987-01-23$0.46$0.46782,400
1987-01-22$0.46$0.461,075,200
1987-01-21$0.46$0.46604,800
1987-01-20$0.46$0.464,190,400
1987-01-19$0.47$0.475,356,800
1987-01-16$0.47$0.47427,200
1987-01-15$0.47$0.471,329,600
1987-01-14$0.45$0.451,512,000
1987-01-13$0.44$0.441,315,200
1987-01-12$0.42$0.421,780,800
1987-01-09$0.41$0.41844,800
1987-01-08$0.42$0.423,216,000
1987-01-07$0.41$0.4119,200
1987-01-06$0.41$0.411,147,200
1987-01-05$0.40$0.40115,200
1987-01-02$0.39$0.39134,400