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 — 1983

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1983-12-30$0.53$0.53508,800
1983-12-29$0.51$0.5167,200
1983-12-28$0.51$0.51153,600
1983-12-27$0.52$0.52168,000
1983-12-23$0.51$0.51177,600
1983-12-22$0.50$0.502,073,600
1983-12-21$0.51$0.512,006,400
1983-12-20$0.51$0.510
1983-12-19$0.51$0.51753,600
1983-12-16$0.51$0.519,600
1983-12-15$0.51$0.5152,800
1983-12-14$0.51$0.51340,800
1983-12-13$0.52$0.52403,200
1983-12-12$0.52$0.52316,800
1983-12-09$0.52$0.52129,600
1983-12-08$0.52$0.52355,200
1983-12-07$0.55$0.55268,800
1983-12-06$0.55$0.55124,800
1983-12-05$0.55$0.55302,400
1983-12-02$0.55$0.55561,600
1983-12-01$0.55$0.55686,400
1983-11-30$0.55$0.55523,200
1983-11-29$0.55$0.551,166,400
1983-11-28$0.54$0.541,910,400
1983-11-25$0.54$0.54196,800
1983-11-23$0.54$0.54926,400
1983-11-22$0.54$0.54648,000
1983-11-21$0.54$0.54254,400
1983-11-18$0.54$0.54129,600
1983-11-17$0.54$0.54139,200
1983-11-16$0.54$0.54350,400
1983-11-15$0.54$0.54302,400
1983-11-14$0.54$0.541,828,800
1983-11-11$0.51$0.511,267,200
1983-11-10$0.51$0.513,115,200
1983-11-09$0.51$0.51240,000
1983-11-08$0.53$0.531,507,200
1983-11-07$0.54$0.54547,200
1983-11-04$0.56$0.56585,600
1983-11-03$0.56$0.56259,200
1983-11-02$0.57$0.57571,200
1983-11-01$0.56$0.5691,200
1983-10-31$0.55$0.55283,200
1983-10-28$0.55$0.55264,000
1983-10-27$0.54$0.54888,000
1983-10-26$0.54$0.54532,800
1983-10-25$0.53$0.53744,000
1983-10-24$0.53$0.53744,000
1983-10-21$0.55$0.55556,800
1983-10-20$0.54$0.54614,400
1983-10-19$0.56$0.561,780,800
1983-10-18$0.64$0.64283,200
1983-10-17$0.65$0.65177,600
1983-10-14$0.64$0.64489,600
1983-10-13$0.65$0.65508,800
1983-10-12$0.66$0.6657,600
1983-10-11$0.66$0.66268,800
1983-10-10$0.67$0.67235,200
1983-10-07$0.67$0.67235,200
1983-10-06$0.67$0.67403,200
1983-10-05$0.66$0.66532,800
1983-10-04$0.66$0.66216,000
1983-10-03$0.66$0.66110,400
1983-09-30$0.67$0.67148,800
1983-09-29$0.67$0.674,219,200
1983-09-28$0.67$0.676,825,600
1983-09-27$0.67$0.672,179,200
1983-09-26$0.67$0.67801,600
1983-09-23$0.68$0.68278,400
1983-09-22$0.69$0.69432,000
1983-09-21$0.68$0.68979,200
1983-09-20$0.70$0.702,544,000
1983-09-19$0.67$0.671,310,400
1983-09-16$0.64$0.64249,600
1983-09-15$0.61$0.61696,000
1983-09-14$0.60$0.601,003,200
1983-09-13$0.61$0.611,224,000
1983-09-12$0.59$0.59950,400
1983-09-09$0.57$0.57259,200
1983-09-08$0.56$0.5643,200
1983-09-07$0.56$0.56768,000
1983-09-06$0.55$0.551,665,600
1983-09-02$0.52$0.52705,600
1983-09-01$0.52$0.52163,200
1983-08-31$0.52$0.521,041,600
1983-08-30$0.52$0.52417,600
1983-08-29$0.52$0.52182,400
1983-08-26$0.52$0.52115,200
1983-08-25$0.52$0.5248,000
1983-08-24$0.52$0.52192,000
1983-08-23$0.51$0.51897,600
1983-08-22$0.51$0.5148,000
1983-08-19$0.51$0.51360,000
1983-08-18$0.51$0.51888,000
1983-08-17$0.50$0.50345,600
1983-08-16$0.49$0.49206,400
1983-08-15$0.50$0.50350,400
1983-08-12$0.50$0.50249,600
1983-08-11$0.49$0.49264,000
1983-08-10$0.50$0.50801,600
1983-08-09$0.51$0.51216,000
1983-08-08$0.50$0.50576,000
1983-08-05$0.51$0.51321,600
1983-08-04$0.51$0.51484,800
1983-08-03$0.52$0.52379,200
1983-08-02$0.52$0.52513,600
1983-08-01$0.49$0.491,233,600
1983-07-29$0.48$0.48480,000
1983-07-28$0.55$0.550
1983-07-27$0.55$0.55422,400
1983-07-26$0.57$0.57710,400
1983-07-25$0.58$0.581,089,600
1983-07-22$0.58$0.581,382,400
1983-07-21$0.57$0.57216,000
1983-07-20$0.57$0.57504,000
1983-07-19$0.60$0.60408,000
1983-07-18$0.60$0.60480,000
1983-07-15$0.61$0.61187,200
1983-07-14$0.61$0.61292,800
1983-07-13$0.61$0.61124,800
1983-07-12$0.61$0.61350,400
1983-07-11$0.60$0.6072,000
1983-07-08$0.60$0.60192,000
1983-07-07$0.61$0.61336,000
1983-07-06$0.61$0.61278,400
1983-07-05$0.61$0.6186,400
1983-07-01$0.62$0.62192,000
1983-06-30$0.62$0.62307,200
1983-06-29$0.60$0.60235,200
1983-06-28$0.60$0.60624,000
1983-06-27$0.60$0.60777,600
1983-06-24$0.61$0.61537,600
1983-06-23$0.60$0.601,627,200
1983-06-22$0.59$0.592,846,400
1983-06-21$0.59$0.59705,600
1983-06-20$0.57$0.57456,000
1983-06-17$0.59$0.59408,000
1983-06-16$0.59$0.591,142,400
1983-06-15$0.59$0.59441,600
1983-06-14$0.59$0.59720,000
1983-06-13$0.57$0.57494,400
1983-06-10$0.56$0.56624,000
1983-06-09$0.56$0.56724,800
1983-06-08$0.56$0.561,022,400
1983-06-07$0.58$0.58859,200
1983-06-06$0.60$0.60556,800
1983-06-03$0.62$0.62436,800
1983-06-02$0.62$0.62316,800
1983-06-01$0.64$0.64528,000
1983-05-31$0.64$0.64403,200
1983-05-27$0.67$0.67369,600
1983-05-26$0.68$0.68432,000
1983-05-25$0.69$0.69580,800
1983-05-24$0.70$0.70432,000
1983-05-23$0.69$0.691,070,400
1983-05-20$0.68$0.68384,000
1983-05-19$0.68$0.68216,000
1983-05-18$0.68$0.68542,400
1983-05-17$0.68$0.681,276,800
1983-05-16$0.68$0.68518,400
1983-05-13$0.68$0.68566,400
1983-05-12$0.67$0.67345,600
1983-05-11$0.67$0.67484,800
1983-05-10$0.67$0.67283,200
1983-05-09$0.67$0.67345,600
1983-05-06$0.67$0.67518,400
1983-05-05$0.67$0.67273,600
1983-05-04$0.67$0.67225,600
1983-05-03$0.67$0.67513,600
1983-05-02$0.67$0.67446,400
1983-04-29$0.67$0.67657,600
1983-04-28$0.65$0.65614,400
1983-04-27$0.65$0.65460,800
1983-04-26$0.65$0.651,329,600
1983-04-25$0.65$0.651,099,200
1983-04-22$0.60$0.602,352,000
1983-04-21$0.55$0.55787,200
1983-04-20$0.54$0.54753,600
1983-04-19$0.52$0.52662,400
1983-04-18$0.51$0.511,036,800
1983-04-15$0.52$0.52547,200
1983-04-14$0.49$0.49657,600
1983-04-13$0.49$0.49240,000
1983-04-12$0.49$0.49955,200
1983-04-11$0.49$0.49412,800
1983-04-08$0.48$0.48345,600
1983-04-07$0.49$0.49240,000
1983-04-06$0.49$0.49427,200
1983-04-05$0.49$0.49182,400
1983-04-04$0.49$0.49134,400
1983-03-31$0.49$0.49705,600
1983-03-30$0.49$0.49604,800
1983-03-29$0.49$0.49633,600
1983-03-28$0.48$0.481,761,600
1983-03-25$0.44$0.44590,400
1983-03-24$0.45$0.451,286,400
1983-03-23$0.45$0.451,228,800
1983-03-22$0.44$0.44182,400
1983-03-21$0.44$0.44432,000
1983-03-18$0.44$0.44336,000
1983-03-17$0.44$0.44240,000
1983-03-16$0.45$0.45139,200
1983-03-15$0.46$0.46619,200
1983-03-14$0.46$0.461,824,000
1983-03-11$0.48$0.48249,600
1983-03-10$0.49$0.49264,000
1983-03-09$0.49$0.49144,000
1983-03-08$0.49$0.49249,600
1983-03-07$0.49$0.49278,400
1983-03-04$0.49$0.49124,800
1983-03-03$0.50$0.501,339,200
1983-03-02$0.50$0.501,190,400
1983-03-01$0.49$0.49115,200
1983-02-28$0.49$0.49369,600
1983-02-25$0.51$0.51350,400
1983-02-24$0.51$0.51446,400
1983-02-23$0.51$0.51393,600
1983-02-22$0.51$0.51316,800
1983-02-18$0.51$0.51681,600
1983-02-17$0.51$0.51124,800
1983-02-16$0.52$0.52528,000
1983-02-15$0.52$0.52326,400
1983-02-14$0.51$0.51662,400
1983-02-11$0.51$0.51211,200
1983-02-10$0.52$0.52259,200
1983-02-09$0.51$0.51134,400
1983-02-08$0.51$0.511,392,000
1983-02-07$0.52$0.52547,200
1983-02-04$0.51$0.511,228,800
1983-02-03$0.51$0.51326,400
1983-02-02$0.51$0.51451,200
1983-02-01$0.51$0.511,200,000
1983-01-31$0.50$0.503,619,200
1983-01-28$0.45$0.453,897,600
1983-01-27$0.44$0.442,630,400
1983-01-26$0.42$0.42124,800
1983-01-25$0.42$0.42816,000
1983-01-24$0.42$0.42595,200
1983-01-21$0.43$0.43172,800
1983-01-20$0.44$0.44182,400
1983-01-19$0.44$0.44537,600
1983-01-18$0.45$0.451,257,600
1983-01-17$0.45$0.45643,200
1983-01-14$0.44$0.44729,600
1983-01-13$0.44$0.44604,800
1983-01-12$0.44$0.44268,800
1983-01-11$0.44$0.441,171,200
1983-01-10$0.44$0.44595,200
1983-01-07$0.43$0.43288,000
1983-01-06$0.43$0.431,008,000
1983-01-05$0.40$0.40739,200
1983-01-04$0.40$0.40355,200
1983-01-03$0.40$0.40153,600