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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$1.08$1.101,634,400
1991-12-30$1.04$1.06974,400
1991-12-27$0.98$0.99206,400
1991-12-26$0.97$0.98271,200
1991-12-24$0.96$0.97448,800
1991-12-23$0.97$0.98590,400
1991-12-20$0.95$0.96379,200
1991-12-19$0.97$0.9872,000
1991-12-18$0.97$0.9869,600
1991-12-17$0.96$0.973,331,200
1991-12-16$0.96$0.971,420,800
1991-12-13$0.99$1.001,996,800
1991-12-12$0.95$0.9691,200
1991-12-11$0.94$0.9521,600
1991-12-10$0.94$0.9524,000
1991-12-09$0.94$0.9512,000
1991-12-06$0.96$0.97283,200
1991-12-05$0.94$0.957,255,200
1991-12-04$0.97$0.980
1991-12-03$0.97$0.9831,200
1991-12-02$0.97$0.981,322,400
1991-11-29$0.97$0.98127,200
1991-11-27$0.95$0.9750,400
1991-11-26$0.96$0.971,399,200
1991-11-25$0.96$0.971,936,800
1991-11-22$0.96$0.982,148,000
1991-11-21$0.96$0.9738,400
1991-11-20$0.97$0.9814,400
1991-11-19$0.95$0.97756,000
1991-11-18$0.97$0.98218,400
1991-11-15$0.97$0.98230,400
1991-11-14$0.99$1.00960,000
1991-11-13$0.97$0.981,874,400
1991-11-12$0.96$0.9812,156,000
1991-11-11$0.95$0.96218,400
1991-11-08$0.96$0.97715,200
1991-11-07$0.95$0.963,256,800
1991-11-06$0.95$0.971,034,400
1991-11-05$0.95$0.960
1991-11-04$0.95$0.964,435,200
1991-11-01$0.96$0.9757,600
1991-10-31$0.97$0.9836,000
1991-10-30$0.97$0.981,701,600
1991-10-29$0.97$0.983,280,800
1991-10-28$0.95$0.961,435,200
1991-10-25$0.96$0.974,884,000
1991-10-24$0.96$0.976,674,400
1991-10-23$0.97$0.9810,128,000
1991-10-22$0.89$0.901,236,000
1991-10-21$1.00$1.01276,000
1991-10-18$1.04$1.06436,800
1991-10-17$1.08$1.10314,400
1991-10-16$1.09$1.11823,200
1991-10-15$1.09$1.1131,200
1991-10-14$1.09$1.1169,600
1991-10-11$1.10$1.12417,600
1991-10-10$1.10$1.12388,800
1991-10-09$1.11$1.130
1991-10-08$1.11$1.13108,000
1991-10-07$1.13$1.14225,600
1991-10-04$1.14$1.1579,200
1991-10-03$1.15$1.16547,200
1991-10-02$1.11$1.13871,200
1991-10-01$1.13$1.14912,000
1991-09-30$1.15$1.16592,800
1991-09-27$1.13$1.1469,600
1991-09-26$1.13$1.14549,600
1991-09-25$1.13$1.141,161,600
1991-09-24$1.15$1.16218,400
1991-09-23$1.13$1.141,428,000
1991-09-20$1.10$1.1233,600
1991-09-19$1.10$1.1131,200
1991-09-18$1.10$1.12333,600
1991-09-17$1.07$1.0916,800
1991-09-16$1.07$1.0912,000
1991-09-13$1.09$1.11316,800
1991-09-12$1.09$1.1155,200
1991-09-11$1.09$1.10196,800
1991-09-10$1.06$1.080
1991-09-09$1.06$1.0840,800
1991-09-06$1.06$1.08120,000
1991-09-05$1.09$1.11460,800
1991-09-04$1.09$1.10112,800
1991-09-03$1.06$1.0864,800
1991-08-30$1.07$1.094,800
1991-08-29$1.08$1.10196,800
1991-08-28$1.05$1.07348,000
1991-08-27$1.05$1.0776,800
1991-08-26$1.06$1.07376,800
1991-08-23$1.03$1.05252,000
1991-08-22$1.04$1.061,190,400
1991-08-21$1.00$1.0196,000
1991-08-20$1.00$1.0160,000
1991-08-19$1.01$1.02316,800
1991-08-16$1.02$1.03424,800
1991-08-15$1.07$1.08484,800
1991-08-14$1.09$1.11112,800
1991-08-13$1.06$1.0872,000
1991-08-12$1.09$1.11312,000
1991-08-09$1.09$1.1128,800
1991-08-08$1.09$1.1119,200
1991-08-07$1.06$1.0836,000
1991-08-06$1.09$1.101,632,000
1991-08-05$1.05$1.07420,000
1991-08-02$1.09$1.112,448,000
1991-08-01$1.09$1.11194,400
1991-07-31$1.04$1.06765,600
1991-07-30$1.07$1.09453,600
1991-07-29$1.03$1.05144,000
1991-07-26$1.02$1.031,888,800
1991-07-25$1.02$1.0314,169,600
1991-07-24$1.04$1.06892,800
1991-07-23$1.06$1.082,474,400
1991-07-22$1.09$1.11763,200
1991-07-19$1.09$1.110
1991-07-18$1.09$1.1116,800
1991-07-17$1.06$1.0819,200
1991-07-16$1.09$1.11823,200
1991-07-15$1.07$1.0948,000
1991-07-12$1.08$1.097,200
1991-07-11$1.07$1.0912,000
1991-07-10$1.09$1.10427,200
1991-07-09$1.05$1.071,269,600
1991-07-08$1.06$1.08240,000
1991-07-05$1.08$1.1084,000
1991-07-03$1.10$1.12146,400
1991-07-02$1.09$1.11612,000
1991-07-01$1.11$1.12633,600
1991-06-28$1.09$1.11160,800
1991-06-27$1.09$1.11487,200
1991-06-26$1.09$1.11184,800
1991-06-25$1.06$1.082,337,600
1991-06-24$1.07$1.0952,800
1991-06-21$1.09$1.110
1991-06-20$1.09$1.111,315,200
1991-06-19$1.07$1.0945,600
1991-06-18$1.07$1.09220,800
1991-06-17$1.06$1.08122,400
1991-06-14$1.06$1.08384,000
1991-06-13$1.14$1.1538,400
1991-06-12$1.10$1.12187,200
1991-06-11$1.11$1.13523,200
1991-06-10$1.06$1.08698,400
1991-06-07$1.07$1.090
1991-06-06$1.07$1.09626,400
1991-06-05$1.09$1.114,252,800
1991-06-04$1.09$1.11141,600
1991-06-03$1.09$1.11907,200
1991-05-31$1.06$1.08136,800
1991-05-30$1.07$1.09940,800
1991-05-29$1.07$1.090
1991-05-28$1.07$1.0936,000
1991-05-24$1.05$1.0750,400
1991-05-23$1.03$1.0414,400
1991-05-22$1.04$1.0533,600
1991-05-21$1.03$1.04336,000
1991-05-20$1.06$1.0876,800
1991-05-17$1.05$1.07309,600
1991-05-16$1.05$1.0712,000
1991-05-15$1.03$1.04460,800
1991-05-14$1.05$1.07796,800
1991-05-13$1.04$1.05400,800
1991-05-10$1.04$1.05660,000
1991-05-09$1.04$1.05336,000
1991-05-08$1.00$1.012,400
1991-05-07$1.00$1.0131,200
1991-05-06$1.02$1.03948,000
1991-05-03$1.02$1.0364,800
1991-05-02$1.01$1.02825,600
1991-05-01$1.01$1.021,238,400
1991-04-30$1.00$1.01379,200
1991-04-29$1.02$1.030
1991-04-26$1.02$1.039,600
1991-04-25$1.00$1.01100,800
1991-04-24$1.00$1.01331,200
1991-04-23$1.01$1.02364,800
1991-04-22$0.99$1.0040,800
1991-04-19$1.00$1.01218,400
1991-04-18$0.99$1.012,479,200
1991-04-17$1.00$1.01151,200
1991-04-16$0.99$1.0043,200
1991-04-15$0.98$0.991,555,200
1991-04-12$1.00$1.01228,000
1991-04-11$0.96$0.9712,000
1991-04-10$0.99$1.0081,600
1991-04-09$0.99$1.00453,600
1991-04-08$1.02$1.0340,800
1991-04-05$1.02$1.03295,200
1991-04-04$1.03$1.0416,800
1991-04-03$1.06$1.0812,000
1991-04-02$1.04$1.05504,000
1991-04-01$1.03$1.043,693,600
1991-03-28$1.03$1.04672,000
1991-03-27$1.05$1.07808,800
1991-03-26$1.06$1.082,556,000
1991-03-25$1.02$1.03988,800
1991-03-22$1.03$1.04319,200
1991-03-21$1.02$1.031,296,000
1991-03-20$1.03$1.04170,400
1991-03-19$1.03$1.04218,400
1991-03-18$1.04$1.0557,600
1991-03-15$1.02$1.03148,800
1991-03-14$1.03$1.044,855,200
1991-03-13$1.03$1.041,104,000
1991-03-12$1.01$1.02312,000
1991-03-11$1.02$1.03292,800
1991-03-08$1.01$1.02484,800
1991-03-07$1.00$1.0131,200
1991-03-06$1.03$1.041,440,000
1991-03-05$1.00$1.01928,800
1991-03-04$0.98$0.9948,000
1991-03-01$0.97$0.98400,800
1991-02-28$0.97$0.983,576,000
1991-02-27$0.96$0.97324,000
1991-02-26$0.98$0.995,008,800
1991-02-25$0.97$0.98158,400
1991-02-22$0.94$0.95345,600
1991-02-21$0.95$0.965,304,000
1991-02-20$0.95$0.96561,600
1991-02-19$1.00$1.01100,800
1991-02-15$0.96$0.97780,000
1991-02-14$0.95$0.96408,000
1991-02-13$0.96$0.97679,200
1991-02-12$0.96$0.97235,200
1991-02-11$0.95$0.961,605,600
1991-02-08$0.95$0.96326,400
1991-02-07$0.93$0.94240,000
1991-02-06$0.95$0.961,226,400
1991-02-05$0.94$0.951,771,200
1991-02-04$0.83$0.846,456,000
1991-02-01$0.83$0.841,536,000
1991-01-31$0.80$0.8126,400
1991-01-30$0.82$0.83770,400
1991-01-29$0.79$0.802,584,800
1991-01-28$0.76$0.77134,400
1991-01-25$0.79$0.8043,200
1991-01-24$0.77$0.783,067,200
1991-01-23$0.77$0.78144,000
1991-01-22$0.79$0.80720,000
1991-01-21$0.75$0.76112,800
1991-01-18$0.75$0.7698,400
1991-01-17$0.77$0.78904,800
1991-01-16$0.77$0.781,526,400
1991-01-15$0.76$0.7721,600
1991-01-14$0.78$0.79108,000
1991-01-11$0.80$0.8136,000
1991-01-10$0.78$0.7984,000
1991-01-09$0.76$0.77408,000
1991-01-08$0.77$0.78410,400
1991-01-07$0.78$0.791,576,800
1991-01-04$0.79$0.802,328,000
1991-01-03$0.86$0.881,147,200
1991-01-02$0.90$0.91228,000