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 — 1989

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1989-12-29$0.74$0.75268,800
1989-12-28$0.73$0.74168,000
1989-12-27$0.73$0.74105,600
1989-12-26$0.71$0.72547,200
1989-12-22$0.72$0.7324,000
1989-12-21$0.72$0.73408,000
1989-12-20$0.72$0.73676,800
1989-12-19$0.69$0.70523,200
1989-12-18$0.71$0.72878,400
1989-12-15$0.74$0.75376,800
1989-12-14$0.76$0.77139,200
1989-12-13$0.77$0.78100,800
1989-12-12$0.77$0.7893,600
1989-12-11$0.76$0.77244,800
1989-12-08$0.77$0.771,980,000
1989-12-07$0.76$0.762,265,600
1989-12-06$0.76$0.76242,400
1989-12-05$0.76$0.767,046,400
1989-12-04$0.76$0.7648,000
1989-12-01$0.76$0.76441,600
1989-11-30$0.76$0.773,261,600
1989-11-29$0.77$0.777,200
1989-11-28$0.76$0.7688,800
1989-11-27$0.76$0.761,051,200
1989-11-24$0.76$0.77516,000
1989-11-22$0.76$0.7655,200
1989-11-21$0.76$0.76204,000
1989-11-20$0.77$0.77643,200
1989-11-17$0.77$0.78132,000
1989-11-16$0.76$0.7664,800
1989-11-15$0.76$0.7626,400
1989-11-14$0.76$0.766,326,400
1989-11-13$0.76$0.760
1989-11-10$0.76$0.76772,800
1989-11-09$0.76$0.77765,600
1989-11-08$0.76$0.7721,600
1989-11-07$0.77$0.77504,000
1989-11-06$0.77$0.77516,000
1989-11-03$0.78$0.7862,400
1989-11-02$0.77$0.7736,000
1989-11-01$0.77$0.78153,600
1989-10-31$0.77$0.774,408,800
1989-10-30$0.77$0.77290,400
1989-10-27$0.77$0.78535,200
1989-10-26$0.79$0.79110,400
1989-10-25$0.77$0.7864,800
1989-10-24$0.77$0.78264,000
1989-10-23$0.78$0.78213,600
1989-10-20$0.78$0.78343,200
1989-10-19$0.77$0.7824,000
1989-10-18$0.77$0.7848,000
1989-10-17$0.77$0.7855,200
1989-10-16$0.77$0.78708,000
1989-10-13$0.78$0.79516,000
1989-10-12$0.80$0.813,064,800
1989-10-11$0.81$0.823,386,400
1989-10-10$0.81$0.82292,800
1989-10-09$0.82$0.8257,600
1989-10-06$0.81$0.8221,600
1989-10-05$0.82$0.823,432,000
1989-10-04$0.81$0.8255,200
1989-10-03$0.81$0.8231,200
1989-10-02$0.83$0.8462,400
1989-09-29$0.82$0.82427,200
1989-09-28$0.82$0.8388,800
1989-09-27$0.82$0.82177,600
1989-09-26$0.83$0.84300,000
1989-09-25$0.80$0.80127,200
1989-09-22$0.80$0.80225,600
1989-09-21$0.80$0.81583,200
1989-09-20$0.80$0.80180,000
1989-09-19$0.80$0.80386,400
1989-09-18$0.81$0.81129,600
1989-09-15$0.80$0.8160,000
1989-09-14$0.80$0.812,066,400
1989-09-13$0.81$0.81732,000
1989-09-12$0.79$0.80343,200
1989-09-11$0.78$0.79225,600
1989-09-08$0.78$0.781,156,800
1989-09-07$0.78$0.78192,000
1989-09-06$0.78$0.79667,200
1989-09-05$0.78$0.79314,400
1989-09-01$0.78$0.78112,800
1989-08-31$0.78$0.790
1989-08-30$0.78$0.79650,400
1989-08-29$0.78$0.7833,600
1989-08-28$0.78$0.7816,800
1989-08-25$0.78$0.79787,200
1989-08-24$0.77$0.7876,800
1989-08-23$0.78$0.79549,600
1989-08-22$0.76$0.76391,200
1989-08-21$0.77$0.78384,000
1989-08-18$0.75$0.761,495,200
1989-08-17$0.75$0.76292,800
1989-08-16$0.76$0.772,265,600
1989-08-15$0.75$0.76854,400
1989-08-14$0.76$0.77259,200
1989-08-11$0.77$0.7728,800
1989-08-10$0.77$0.78801,600
1989-08-09$0.77$0.78780,000
1989-08-08$0.79$0.79103,200
1989-08-07$0.78$0.79609,600
1989-08-04$0.78$0.782,436,000
1989-08-03$0.79$0.7952,800
1989-08-02$0.78$0.78103,200
1989-08-01$0.78$0.78384,000
1989-07-31$0.78$0.78100,800
1989-07-28$0.77$0.78129,600
1989-07-27$0.78$0.781,080,000
1989-07-26$0.77$0.78902,400
1989-07-25$0.77$0.782,808,000
1989-07-24$0.78$0.782,968,800
1989-07-21$0.78$0.78307,200
1989-07-20$0.78$0.781,761,600
1989-07-19$0.76$0.76360,000
1989-07-18$0.74$0.75105,600
1989-07-17$0.74$0.751,766,400
1989-07-14$0.73$0.742,887,200
1989-07-13$0.73$0.741,197,600
1989-07-12$0.73$0.74693,600
1989-07-11$0.71$0.71576,000
1989-07-10$0.70$0.71139,200
1989-07-07$0.69$0.7067,200
1989-07-06$0.70$0.7116,800
1989-07-05$0.69$0.70614,400
1989-07-03$0.70$0.7188,800
1989-06-30$0.71$0.71192,000
1989-06-29$0.70$0.7062,400
1989-06-28$0.71$0.71331,200
1989-06-27$0.70$0.71391,200
1989-06-26$0.69$0.6936,000
1989-06-23$0.69$0.6950,400
1989-06-22$0.69$0.69328,800
1989-06-21$0.69$0.69379,200
1989-06-20$0.69$0.69698,400
1989-06-19$0.69$0.6979,200
1989-06-16$0.69$0.6969,600
1989-06-15$0.69$0.6928,800
1989-06-14$0.69$0.69948,000
1989-06-13$0.69$0.69544,800
1989-06-12$0.70$0.70146,400
1989-06-09$0.70$0.7098,400
1989-06-08$0.70$0.7043,200
1989-06-07$0.70$0.70592,800
1989-06-06$0.70$0.70182,400
1989-06-05$0.70$0.7124,000
1989-06-02$0.71$0.71588,000
1989-06-01$0.69$0.70465,600
1989-05-31$0.69$0.70192,000
1989-05-30$0.70$0.70621,600
1989-05-26$0.69$0.7072,000
1989-05-25$0.70$0.71156,000
1989-05-24$0.69$0.69115,200
1989-05-23$0.68$0.6936,000
1989-05-22$0.68$0.69103,200
1989-05-19$0.69$0.70705,600
1989-05-18$0.68$0.68676,800
1989-05-17$0.69$0.70398,400
1989-05-16$0.67$0.67120,000
1989-05-15$0.67$0.67501,600
1989-05-12$0.67$0.672,184,000
1989-05-11$0.67$0.67792,000
1989-05-10$0.67$0.67523,200
1989-05-09$0.66$0.6733,600
1989-05-08$0.66$0.67297,600
1989-05-05$0.68$0.68290,400
1989-05-04$0.68$0.68189,600
1989-05-03$0.68$0.687,200
1989-05-02$0.67$0.689,600
1989-05-01$0.67$0.6791,200
1989-04-28$0.67$0.684,413,600
1989-04-27$0.69$0.7048,000
1989-04-26$0.70$0.71160,800
1989-04-25$0.70$0.71192,000
1989-04-24$0.71$0.722,400
1989-04-21$0.70$0.7116,800
1989-04-20$0.70$0.711,252,800
1989-04-19$0.71$0.71614,400
1989-04-18$0.70$0.71408,000
1989-04-17$0.69$0.7021,600
1989-04-14$0.69$0.7040,800
1989-04-13$0.69$0.70103,200
1989-04-12$0.69$0.70264,000
1989-04-11$0.69$0.703,060,000
1989-04-10$0.70$0.7076,800
1989-04-07$0.71$0.71290,400
1989-04-06$0.69$0.702,335,200
1989-04-05$0.69$0.7072,000
1989-04-04$0.70$0.713,561,600
1989-04-03$0.70$0.71232,800
1989-03-31$0.71$0.71372,000
1989-03-30$0.69$0.70307,200
1989-03-29$0.69$0.70340,800
1989-03-28$0.70$0.71297,600
1989-03-27$0.69$0.69259,200
1989-03-23$0.69$0.69511,200
1989-03-22$0.70$0.701,303,200
1989-03-21$0.69$0.69722,400
1989-03-20$0.67$0.671,802,400
1989-03-17$0.67$0.68108,000
1989-03-16$0.68$0.681,425,600
1989-03-15$0.67$0.67163,200
1989-03-14$0.67$0.68868,800
1989-03-13$0.67$0.67230,400
1989-03-10$0.69$0.69350,400
1989-03-09$0.68$0.68266,400
1989-03-08$0.68$0.69324,000
1989-03-07$0.68$0.68583,200
1989-03-06$0.68$0.6872,000
1989-03-03$0.68$0.6816,800
1989-03-02$0.68$0.68180,000
1989-03-01$0.68$0.6857,600
1989-02-28$0.68$0.68158,400
1989-02-27$0.68$0.682,080,800
1989-02-24$0.69$0.691,207,200
1989-02-23$0.69$0.6928,800
1989-02-22$0.70$0.70696,000
1989-02-21$0.70$0.70228,000
1989-02-17$0.70$0.70813,600
1989-02-16$0.70$0.702,628,000
1989-02-15$0.70$0.70991,200
1989-02-14$0.69$0.69396,000
1989-02-13$0.68$0.692,133,600
1989-02-10$0.68$0.68129,600
1989-02-09$0.69$0.70196,800
1989-02-08$0.70$0.712,078,400
1989-02-07$0.70$0.712,899,200
1989-02-06$0.70$0.71417,600
1989-02-03$0.71$0.7160,000
1989-02-02$0.71$0.7124,000
1989-02-01$0.71$0.71472,800
1989-01-31$0.70$0.70602,400
1989-01-30$0.71$0.71580,800
1989-01-27$0.69$0.70931,200
1989-01-26$0.70$0.71163,200
1989-01-25$0.70$0.702,534,400
1989-01-24$0.71$0.71352,800
1989-01-23$0.69$0.69223,200
1989-01-20$0.69$0.6938,400
1989-01-19$0.70$0.7126,400
1989-01-18$0.69$0.69302,400
1989-01-17$0.70$0.7074,400
1989-01-16$0.69$0.69415,200
1989-01-13$0.68$0.6950,400
1989-01-12$0.68$0.68218,400
1989-01-11$0.69$0.69429,600
1989-01-10$0.68$0.682,510,400
1989-01-09$0.66$0.671,828,800
1989-01-06$0.70$0.70696,000
1989-01-05$0.71$0.724,665,600
1989-01-04$0.72$0.72741,600
1989-01-03$0.72$0.72991,200