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 — 1986

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1986-12-31$0.39$0.392,476,800
1986-12-30$0.38$0.38700,800
1986-12-29$0.39$0.39100,800
1986-12-26$0.38$0.38196,800
1986-12-24$0.38$0.3824,000
1986-12-23$0.38$0.38331,200
1986-12-22$0.39$0.39796,800
1986-12-19$0.39$0.39144,000
1986-12-18$0.38$0.38278,400
1986-12-17$0.38$0.3891,200
1986-12-16$0.38$0.381,497,600
1986-12-15$0.39$0.39796,800
1986-12-12$0.39$0.3962,400
1986-12-11$0.40$0.4043,200
1986-12-10$0.40$0.4038,400
1986-12-09$0.40$0.401,281,600
1986-12-08$0.40$0.40211,200
1986-12-05$0.40$0.40297,600
1986-12-04$0.40$0.40609,600
1986-12-03$0.40$0.40124,800
1986-12-02$0.40$0.401,536,000
1986-12-01$0.40$0.40268,800
1986-11-28$0.40$0.40417,600
1986-11-26$0.40$0.40696,000
1986-11-25$0.40$0.40417,600
1986-11-24$0.40$0.401,905,600
1986-11-21$0.40$0.40883,200
1986-11-20$0.40$0.4033,600
1986-11-19$0.40$0.40177,600
1986-11-18$0.40$0.40211,200
1986-11-17$0.40$0.409,600
1986-11-14$0.40$0.4062,400
1986-11-13$0.40$0.4019,200
1986-11-12$0.41$0.41513,600
1986-11-11$0.40$0.40220,800
1986-11-10$0.41$0.41892,800
1986-11-07$0.41$0.41148,800
1986-11-06$0.40$0.4062,400
1986-11-05$0.40$0.40192,000
1986-11-04$0.40$0.4086,400
1986-11-03$0.40$0.40172,800
1986-10-31$0.40$0.4038,400
1986-10-30$0.39$0.39110,400
1986-10-29$0.39$0.3957,600
1986-10-28$0.40$0.40700,800
1986-10-27$0.40$0.402,611,200
1986-10-24$0.40$0.40336,000
1986-10-23$0.40$0.402,467,200
1986-10-22$0.42$0.42532,800
1986-10-21$0.41$0.411,204,800
1986-10-20$0.42$0.42878,400
1986-10-17$0.42$0.42849,600
1986-10-16$0.42$0.42158,400
1986-10-15$0.41$0.41796,800
1986-10-14$0.40$0.40220,800
1986-10-13$0.39$0.3981,600
1986-10-10$0.39$0.39561,600
1986-10-09$0.38$0.3824,000
1986-10-08$0.38$0.3852,800
1986-10-07$0.36$0.3691,200
1986-10-06$0.36$0.3638,400
1986-10-03$0.36$0.36201,600
1986-10-02$0.36$0.3657,600
1986-10-01$0.35$0.351,737,600
1986-09-30$0.34$0.34576,000
1986-09-29$0.34$0.34235,200
1986-09-26$0.35$0.351,828,800
1986-09-25$0.34$0.3428,800
1986-09-24$0.35$0.351,320,000
1986-09-23$0.35$0.352,107,200
1986-09-22$0.35$0.351,046,400
1986-09-19$0.36$0.36331,200
1986-09-18$0.34$0.34772,800
1986-09-17$0.34$0.34763,200
1986-09-16$0.36$0.36158,400
1986-09-15$0.38$0.38628,800
1986-09-12$0.40$0.402,217,600
1986-09-11$0.41$0.41849,600
1986-09-10$0.40$0.40120,000
1986-09-09$0.40$0.40734,400
1986-09-08$0.41$0.4172,000
1986-09-05$0.40$0.40288,000
1986-09-04$0.41$0.41945,600
1986-09-03$0.40$0.40504,000
1986-09-02$0.41$0.41268,800
1986-08-29$0.40$0.40753,600
1986-08-28$0.41$0.41480,000
1986-08-27$0.40$0.401,147,200
1986-08-26$0.42$0.42201,600
1986-08-25$0.42$0.42921,600
1986-08-22$0.39$0.391,118,400
1986-08-21$0.38$0.382,572,800
1986-08-20$0.38$0.3812,192,000
1986-08-19$0.33$0.33945,600
1986-08-18$0.34$0.343,744,000
1986-08-15$0.33$0.331,224,000
1986-08-14$0.33$0.33748,800
1986-08-13$0.34$0.341,420,800
1986-08-12$0.33$0.331,459,200
1986-08-11$0.33$0.33643,200
1986-08-08$0.32$0.32316,800
1986-08-07$0.33$0.33235,200
1986-08-06$0.33$0.33105,600
1986-08-05$0.32$0.32566,400
1986-08-04$0.32$0.32115,200
1986-08-01$0.32$0.323,595,200
1986-07-31$0.32$0.32321,600
1986-07-30$0.33$0.33110,400
1986-07-29$0.32$0.32969,600
1986-07-28$0.32$0.3267,200
1986-07-25$0.33$0.332,025,600
1986-07-24$0.33$0.33398,400
1986-07-23$0.33$0.33537,600
1986-07-22$0.33$0.331,555,200
1986-07-21$0.33$0.339,600
1986-07-18$0.33$0.33196,800
1986-07-17$0.33$0.332,337,600
1986-07-16$0.33$0.331,780,800
1986-07-15$0.34$0.349,120,000
1986-07-14$0.35$0.3533,600
1986-07-11$0.34$0.341,425,600
1986-07-10$0.32$0.32465,600
1986-07-09$0.34$0.34177,600
1986-07-08$0.35$0.35264,000
1986-07-07$0.36$0.36542,400
1986-07-03$0.38$0.381,598,400
1986-07-02$0.38$0.381,737,600
1986-07-01$0.37$0.37422,400
1986-06-30$0.37$0.37115,200
1986-06-27$0.38$0.381,228,800
1986-06-26$0.38$0.38652,800
1986-06-25$0.37$0.371,344,000
1986-06-24$0.37$0.37312,000
1986-06-23$0.37$0.3713,152,000
1986-06-20$0.38$0.38489,600
1986-06-19$0.38$0.38609,600
1986-06-18$0.39$0.39696,000
1986-06-17$0.40$0.401,420,800
1986-06-16$0.39$0.39667,200
1986-06-13$0.42$0.42235,200
1986-06-12$0.42$0.42120,000
1986-06-11$0.41$0.41153,600
1986-06-10$0.41$0.41340,800
1986-06-09$0.42$0.42345,600
1986-06-06$0.43$0.433,004,800
1986-06-05$0.45$0.456,600,000
1986-06-04$0.47$0.47350,400
1986-06-03$0.47$0.475,414,400
1986-06-02$0.46$0.46105,600
1986-05-30$0.46$0.461,060,800
1986-05-29$0.45$0.452,640,000
1986-05-28$0.49$0.491,041,600
1986-05-27$0.51$0.51220,800
1986-05-23$0.51$0.511,752,000
1986-05-22$0.50$0.503,316,800
1986-05-21$0.50$0.501,718,400
1986-05-20$0.51$0.5152,800
1986-05-19$0.49$0.499,600
1986-05-16$0.51$0.51129,600
1986-05-15$0.50$0.50427,200
1986-05-14$0.51$0.51355,200
1986-05-13$0.51$0.51326,400
1986-05-12$0.51$0.51379,200
1986-05-09$0.49$0.493,163,200
1986-05-08$0.49$0.49139,200
1986-05-07$0.49$0.491,267,200
1986-05-06$0.51$0.511,233,600
1986-05-05$0.51$0.51105,600
1986-05-02$0.51$0.5128,800
1986-05-01$0.51$0.515,601,600
1986-04-30$0.51$0.51705,600
1986-04-29$0.53$0.531,790,400
1986-04-28$0.53$0.53168,000
1986-04-25$0.53$0.5362,400
1986-04-24$0.52$0.52182,400
1986-04-23$0.52$0.52331,200
1986-04-22$0.52$0.521,089,600
1986-04-21$0.53$0.5381,600
1986-04-18$0.53$0.532,452,800
1986-04-17$0.52$0.52801,600
1986-04-16$0.52$0.52691,200
1986-04-15$0.51$0.51120,000
1986-04-14$0.52$0.52115,200
1986-04-11$0.51$0.511,622,400
1986-04-10$0.51$0.512,001,600
1986-04-09$0.52$0.522,227,200
1986-04-08$0.51$0.517,401,600
1986-04-07$0.52$0.521,142,400
1986-04-04$0.52$0.52998,400
1986-04-03$0.53$0.53129,600
1986-04-02$0.52$0.5286,400
1986-04-01$0.51$0.511,012,800
1986-03-31$0.50$0.50278,400
1986-03-27$0.50$0.502,409,600
1986-03-26$0.47$0.472,702,400
1986-03-25$0.47$0.47316,800
1986-03-24$0.48$0.48196,800
1986-03-21$0.48$0.482,952,000
1986-03-20$0.49$0.49921,600
1986-03-19$0.49$0.495,572,800
1986-03-18$0.51$0.51345,600
1986-03-17$0.52$0.52513,600
1986-03-14$0.53$0.531,132,800
1986-03-13$0.53$0.53868,800
1986-03-12$0.54$0.542,630,400
1986-03-11$0.53$0.53254,400
1986-03-10$0.54$0.5467,200
1986-03-07$0.54$0.54264,000
1986-03-06$0.54$0.5420,476,800
1986-03-05$0.54$0.54134,400
1986-03-04$0.55$0.55216,000
1986-03-03$0.56$0.56921,600
1986-02-28$0.57$0.574,396,800
1986-02-27$0.56$0.56163,200
1986-02-26$0.56$0.562,078,400
1986-02-25$0.54$0.545,169,600
1986-02-24$0.52$0.52417,600
1986-02-21$0.52$0.52273,600
1986-02-20$0.50$0.501,075,200
1986-02-19$0.51$0.51206,400
1986-02-18$0.51$0.51566,400
1986-02-14$0.51$0.51556,800
1986-02-13$0.51$0.5119,200
1986-02-12$0.51$0.5167,200
1986-02-11$0.50$0.50211,200
1986-02-10$0.51$0.51859,200
1986-02-07$0.51$0.51225,600
1986-02-06$0.50$0.50384,000
1986-02-05$0.50$0.50417,600
1986-02-04$0.50$0.50360,000
1986-02-03$0.51$0.51105,600
1986-01-31$0.49$0.49115,200
1986-01-30$0.50$0.502,793,600
1986-01-29$0.50$0.50182,400
1986-01-28$0.51$0.5172,000
1986-01-27$0.51$0.51196,800
1986-01-24$0.50$0.50110,400
1986-01-23$0.50$0.50292,800
1986-01-22$0.51$0.51235,200
1986-01-21$0.51$0.51686,400
1986-01-20$0.52$0.52748,800
1986-01-17$0.53$0.533,081,600
1986-01-16$0.54$0.5417,899,200
1986-01-15$0.53$0.53571,200
1986-01-14$0.53$0.533,883,200
1986-01-13$0.53$0.531,833,600
1986-01-10$0.53$0.53547,200
1986-01-09$0.52$0.522,097,600
1986-01-08$0.52$0.523,883,200
1986-01-07$0.52$0.527,252,800
1986-01-06$0.50$0.50590,400
1986-01-03$0.49$0.49336,000
1986-01-02$0.49$0.495,400,000